NRT2 NRT Power Reflection Meter
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PRODUCT INFORMATION
SPECIFICATIONS
- Power Measurement Range: 0.006 W to 120 W (average), 300 W
(peak) - Frequency Range: 25 MHz to 4 GHz
- SWR (Referenced to 50Ω): 1.06 to 1.12
- Insertion Loss: Varies based on frequency range
- Directivity: 30 dB
PRODUCT USAGE INSTRUCTIONS
Forward Measurement Function
The forward measurement function displays average power, average
burst power, peak envelope power (PEP), and peak-to-average power
ratio (crest factor). It also shows absorption average power,
absorption burst power, absorption PEP, and amplitude distribution
for modulated signals.
Reflection Measurement Function
The reflection measurement function shows average power, return
loss, SWR, reflection coefficient, and reflection ratio in %.
Analog Bargraph and Autoscale
Measurements can be shown as numeric values or in an analog
bargraph. The autoscale function optimally adjusts the analog
measuring range to the measured signal.
Visual Limit Monitoring
Each measurement can be visually monitored with values outside
defined limits highlighted in red. The analog bargraph graphically
displays the defined limits in red.
Average Power (RMS Value)
Returns the average value of power for any test signal with a
measurement range of 35 dB to 40 dB and high accuracy.
Peak Envelope Power (PEP) and Crest Factor
Provides information on peak power of a modulated envelope and
overdrive characteristics of transmitter output stages. Crest
factor measurement is referenced to average power.
Average Burst Power
Measures modulated and unmodulated bursts based on average power
and duty cycle.
Complementary Cumulative Distribution Function (CCDF)
Measures the probability of peak envelope power exceeding a
preset threshold to determine signal amplitude distribution.
FREQUENTLY ASKED QUESTIONS (FAQ)
Q: What is the maximum power measurement range of the
product?
A: The maximum power measurement range is 0.006 W to 120 W for
average power and 300 W for peak power.
Q: What is the frequency range covered by the product?
A: The product covers a frequency range from 25 MHz to 4
GHz.
Q: Can the product measure both forward and reverse power
simultaneously?
A: Yes, the product can display forward and reverse power
simultaneously.
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R&S®NRT POWER REFLECTION METER FAMILY
R&S®NRT2, R&S®NRT-Z14 and R&S®NRT-Z44
Product Brochure Version 05.00 Product Brochure Version 05.00
AT A GLANCE
Directional power sensors measure forward and reverse power under operating conditions. These measurements are required when installing, servicing and monitoring transmitters, antennas and RF generators. The R&S®NRT family consists of the R&S®NRT2 power reflection meter and various R&S®NRT-Zxx directional power sensors. Thanks to their wide range of measurement functions and high accuracy, they are suitable for use in research, development and production.
The R&S®NRT-Zxx directional power sensors are self-contained measuring instruments. They can be connected directly to the R&S®NRT2 or, via the R&S®NRT-Z5 USB interface adapter, to the PC.
The compact R&S®NRT2 power reflection meter supports all the measurement functions of the R&S®NRT-Zxx directional power sensors. The large, user-friendly touchscreen simultaneously displays the forward and reverse power. The base unit is exceptionally easy and intuitive to use and can be remotely controlled via LAN, GPIB (R&S®NRT2-B8 option) or USB.
Key facts Simultaneous display of forward and reverse power Measurement of average power, average burst power,
peak power, crest factor, CCDF and mismatch 5″ color touchscreen Direct operation of the R&S®NRT-Zxx directional power
sensors from a PC Frequency range from 25 MHz to 4 GHz
(sensor-dependent)
2
BENEFITS
R&S®NRT2 power reflection meter Simple touchscreen operation Simultaneous display of forward and reverse power Analog bargraph and autoscale Visual limit monitoring 100 % code compatibility with predecessor model page 4
R&S®NRT-Zxx directional power sensors Various sensor models Diverse measurement functions Direct power monitoring on a PC page 5
Versatile applications Continuous monitoring of transmitter systems Power measurements with digital modulation page 7
3
Rohde & Schwarz R&S®NRT Power Reflection Meter Family 3
R&S®NRT2 POWER REFLECTION METER
Analog bar graph with configurable limits Forward measurement function Reflection measurement function
Simple touchscreen operation Thanks to intelligent menus, the compact R&S®NRT2 base unit with a state-of-the-art 5″ touchscreen is extremely easy to operate. On the top menu level, users can switch between the most important measurements. Additional parameters can be set in clearly structured submenus. Important functions such as setting frequencies, zeroing and creating screenshots can be accessed at the push of a button.
Simultaneous display of forward and reverse power The R&S®NRT-Z14 and R&S®NRT-Z44 directional power sensors simultaneously measure forward and reverse power and calculate additional parameters such as load matching. The R&S®NRT2 power reflection meter then displays one forward and one reverse parameter at the same time.
The forward measurement function shows the average power, average burst power, peak envelope power (PEP) and the peak-to-average power ratio (crest factor). The calculated absorption average power (forward minus reverse), absorption burst power, absorption PEP and amplitude distribution (CCDF) for modulated signals can also be displayed.
The reflection measurement function displays the average power, return loss, SWR, reflection coefficient and reflection ratio in %.
Analog bargraph and autoscale Measurements can be shown as numeric values or in an analog bargraph. To define the analog measuring range, the user starts the autoscale function by simply pressing a button. The scale of the analog bargraph is optimally adjusted to the measured signal.
Visual limit monitoring Each measurement can be visually monitored. Values outside the defined limits are highlighted in red. The analog bargraph additionally graphically displays the defined limits in red.
100 % code compatibility with predecessor model The remote commands of the R&S®NRT2 are 100 % code compatible with the command set of the previous R&S®NRT model. This simplifies device replacement and integration into existing systems (no additional programming required). The R&S®NRT2 power reflection meter can be remote controlled via USB or LAN. The R&S®NRT2-B8 option adds remote control via GPIB (IEEE 488).
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R&S®NRT-ZXX DIRECTIONAL POWER SENSORS
Various sensor models The R&S®NRT-Z44 directional power sensor is tailor-made to meet the requirements of all common radiocommunications standards: The wide frequency range from 200/400 MHz to 4 GHz
covers all relevant frequency bands The measurement method is compatible with all
common analog and digital modulation standards
The R&S®NRT-Z14 directional power sensor (25 MHz to 1 GHz) can be used in traditional analog radio and broadcast frequency bands.
Diverse measurement functions The R&S®NRT-Z14 and R&S®NRT-Z44 power sensors support the following measurement functions.
Average power (RMS value) This function returns the average value of the power for any type of test signal (modulated, unmodulated or several carriers). It features a measurement range of 35 dB to 40 dB and high measurement accuracy.
Peak envelope power (PEP) and crest factor Both parameters provide information on the peak power of a modulated envelope and describe the overdrive characteristics of transmitter output stages. The result of the crest factor measurement is referenced to the average power and displayed in dB. Measurements are performed using a video bandwidth that is adjustable in several steps, so that even short-time and high-power peaks can be determined.
Average burst power This function can be used to measure modulated and unmodulated bursts based on the average power and the duty cycle. Both can be defined by the user or determined automatically by the power sensor.
Complementary cumulative distribution function (CCDF) This function measures the probability of the peak envelope power exceeding a preset threshold so that the amplitude distribution of signals with an unknown envelope can be determined.
Rohde & Schwarz R&S®NRT Power Reflection Meter Family 5
Direct power monitoring on a PC The R&S®NRT-Zxx directional power sensors are fully calibrated, independent measuring instruments that can also be used without the base unit. The R&S®NRT-Z5 USB interface adapter enables direct connection to a laptop/PC. The R&S®NRT-Z14 and R&S®NRT-Z44 power sensors make high-precision power and reflection measurements extremely cost-effective. Direct monitoring on a PC is very useful in applications where data needs to be collected (e.g. in development labs and for maintenance of base stations) as well as for purely remote controlled applications such as power monitoring in transmitter stations and EMC test systems. The R&S®Virtual-NRT Windows user interface (provided as a free download) allows users to define measurement functions and also display and store individual results and series of measurements.
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VERSATILE APPLICATIONS
Continuous monitoring of transmitter systems Many applications need continuous monitoring of power and reflection, e.g. to enable fast reaction times when an antenna is damaged. This requires a highly accurate measuring instrument that does not influence the SWR and attenuation of the antenna feeder and does not generate any interfering signals. The R&S®NRT-Z14 and R&S®NRT-Z44 directional power sensors feature good matching, low insertion loss and excellent intermodulation characteristics. When a multicarrier signal is applied, the sum power is displayed a feature rarely found in conventional directional power sensors. Since data is digitally transferred, the length of the connecting cable is not critical and the R&S®NRT-Z14 and R&S®NRT-Z44 directional power sensors can be installed where they measure most accurately at the antenna feed point.
Power measurements with digital modulation Conventional directional power meters only measure RF and microwave signals that have an unmodulated envelope. The R&S®NRT-Z14 and R&S®NRT-Z44 directional power sensors have been designed to also meet the requirements of digitally modulated signals. The key factor is their ability to correctly measure the average power (RMS value) of a signal irrespective of its envelope. The sensors behave like a thermal power meter and offer the best accuracy and measurement range (35 dB to 40 dB).
For TDMA systems, the average burst power function makes it possible to measure transmitter power in an active timeslot. If several timeslots are active (e.g. base stations), the average power function can determine the average power over all timeslots. The peak envelope power function can measure overshoots at the beginning of a timeslot or peak values caused by modulation down to a minimum duration of 200 ns (R&S®NRT-Z44) or 1.5 µs (R&S®NRT-Z14).
When measuring CDMA signals with the ¸NRT-Z44 directional power sensors, both the peak envelope power function and the average power function can be used. The peak envelope power function measures the shorttime peak values that are approx. 10 dB above the average value. This provides information about the overdrive capability of the transmitter output stage. The peak envelope power can be displayed as an absolute value in W or dBm or as a relative value in dB referenced to the average value (crest factor).
Rohde & Schwarz R&S®NRT Power Reflection Meter Family 7
SPECIFICATIONS
R&S®NRT-Z14/-Z44 directional power sensors
R&S®NRT-Z14
R&S®NRT-Z44
General data (max. power, see diagram)
Power measurement range 1)
0.006 W to 120 W (average), 300 W (peak)
0.003 W to 120 W (average), 300 W (peak)
Frequency range SWR (referenced to 50 ) Insertion loss Directivity 2)
25 MHz to 1 GHz 1.06 0.06 dB, typ. 0.04 dB 30 dB
200 MHz to 4 GHz
0.2 GHz to 3 GHz: 1.07 3 GHz to 4 GHz: 1.12
0.2 GHz to 1.5 GHz: 0.06 dB, typ. 0.04 dB 1.5 GHz to 4 GHz: 0.10 dB, typ. 0.07 dB
0.2 GHz to 3 GHz: 30 dB 3 GHz to 4 GHz: 26 dB
Average power measurement 3), 4)
Definition
Power measurement range 5) CF (crest factor): peak-to-average ratio
Modulation
mean value of carrier power, averaged over several modulation cycles (thermal equivalent, true RMS value in case of voltage measurement)
CW, FM, M, FSK or GMSK: 0.03 [0.006] W to 300 W
other modulation modes: 0.03 [0.006] W to 300 [50] W/CF 6)
CW, FM, M, FSK or GMSK: 0.03 [0.006] W to 300 W
other modulation modes: 0.03 [0.006] W to 300 [50] W/CF 6)
for all types of analog and digital modulation; lowest frequency component of signal envelope should exceed 7 Hz for steady indication
Measurement uncertainty 7) from +18 °C to +28 °C, CW signal
from 40 MHz to 1 GHz: 3.2 % of rdg (0.14 dB) 8) from 25 MHz to 40 MHz: 4.0 % of rdg (0.17 dB) 8)
plus zero offset
from 0.3 GHz to 4 GHz: 3.2 % of rdg (0.14 dB) 9) from 0.2 GHz to 0.3 GHz: 4.0 % of rdg (0.17 dB) 9)
plus zero offset
Modulated signal
same as CW signal, plus errors due to modulation
Zero offset
±0.004 [±0.0008] W 10)
±0.004 [±0.0004] W 10)
Typical errors due to modulation 11)
FM, M, FSK, GMSK: ±0 % of rdg (0 dB) AM (80 %): ±3 % of rdg (±0.13 dB) EDGE, TETRA 12): ±0.5 % of rdg (±0.02 dB) 2 CW carriers: ±2.0 % of rdg (±0.09 dB)
FM, M, FSK, GMSK: ±0 % of rdg (0 dB) AM (80 %): ±3 % of rdg (±0.13 dB) cdmaOne, DAB 12): ±1 % of rdg (±0.04 dB) CDMA2000® (3X) 13): ±2 % of rdg (±0.09 dB) EDGE 12): ±0.5 % of rdg (±0.02dB) WCDMA 14): ±2 % of rdg (±0.09 dB) DVB-T 12): ±2 % of rdg (±0.09 dB) /4 DQPSK: ±2 % of rdg (±0.09 dB) 2 CW carriers: ±2 % of rdg (±0.09 dB)
Temperature coefficient 15)
40 MHz to 1 GHz: 0.25 %/K (0.011 dB/K) 25 MHz to 40 MHz: 0.40 %/K (0.017 dB/K)
0.3 GHz to 4 GHz: 0.25 %/K (0.011 dB/K) 0.2 GHz to 0.3 GHz: 0.40 %/K (0.017 dB/K)
Measurement time/averaging factor 16) Values in ( ) for high resolution setting
0 W to 0.2 W: 1.31 (4.83) s/32 (128) 0.2 W to 2 W: 0.27 (1.31) s/4 (32) 2 W to 300 W: 0.18 (0.27) s/1 (4)
0 W to 0.2 W: 1.31 (4.83) s/32 (128) 0.2 W to 2 W: 0.27 (1.31) s/4 (32) 2 W to 300 W: 0.18 (0.27) s/1 (4)
Average burst power measurement 3), 4)
Video bandwidth settings in { }
average power value of periodic RF bursts based on the measurement of the average power under consideration
Definition
of burst width t and repetition rate 1/T: average burst power = average power × T/t t and T can be predefined (calculate mode) or measured (measure mode)
Power measurement range
Calculate mode 5)
Measure mode (only with forward direction 1 2) Values in ( ) for “FULL” video bandwidth setting
0.03 [0.006] W × (T/t) up to specified upper limit of average power measurement
same as calculate mode, but at least 2 (4) W
0.03 [0.003] W × (T/t) up to specified upper limit of average power measurement
same as calculate mode, but at least 2 (5) W
Burst width (t)
Calculate mode Measure mode Repetition rate (1/T)
0.2 µs to 150 ms
500 µs to 150 ms {4 kHz} 10 µs to 150 ms {200 kHz} 2 µs to 150 ms {“FULL”}
min. 7/s
0.2 µs to 150 ms
500 µs to 150 ms {4 kHz} 10 µs to 150 ms {200 kHz} 1 µs to 150 ms {“FULL”}
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R&S®NRT-Z14/-Z44 directional power sensors
R&S®NRT-Z14
R&S®NRT-Z44
Duty cycle t/T
Calculate mode
as defined by burst width and repetition rate
Measure mode
0.01 to 1
Measurement uncertainty from +18 °C to +28 °C
Calculate mode
same as for average power measurement; stated zero offset multiplied by T/t
Measure mode
same as for calculate mode plus 2 % of rdg (0.09 dB) at 0.1 duty cycle 17)
Temperature coefficient
same as for average power measurement
Measurement time/averaging factor 16)
Calculate mode
see average power measurement with corresponding average power value (average burst power multiplied by t/T)
Measure mode with 0.1 duty cycle Values in ( ) for high resolution setting
2 W to 20 W: 1.6 (9.5) s/4 (32) 20 W to 300 W: 0.75 (1.6) s/1 (4)
2 W to 20 W: 1.6 (9.5) s/4 (32) 20 W to 300 W: 0.75 (1.6) s/1 (4)
Crest factor measurement Definition
ratio of peak envelope power to average power in dB (only with 1 2 forward direction)
Power measurement range
see average power and peak envelope power specifications
Measurement uncertainty
approx. 4.3 dB × (measurement error of peak hold circuit in W divided by peak envelope power)
Measurement time/averaging factor see specifications for peak envelope power measurement with simultaneous reflection measurement
Peak envelope measurement (PEP) 3) Video bandwidth settings in { }
Definition
peak value of carrier power (only with 1 2 forward direction)
Power measurement range
Burst signals (repetition rate min. 20/s)
from 100 µs width {4 kHz}: 0.4 W to 300 W from 4 µs width {200 kHz}: 1 W to 300 W from 2 µs width {“FULL”}: 2 W to 300 W
cdmaOne, WCDMA, CDMA2000®, DAB, DVB-T
from 100 s width {4 kHz}: 0.4 W to 300 W from 4 s width {200 kHz}: 1 W to 300 W from 1 s width {“FULL”}: 2 W to 300 W from 0.5 µs width {“FULL”}: 8 W to 300 W
4 W to 300 W {“FULL” with modulation correction
switched on}
Other signal type
see burst signal of equivalent burst width
Measurement uncertainty from +18 °C to +28 °C Measurement error limits of peak hold circuit for burst signals with specified burst width, repetition rate > 100/s, duty cycle from 0.1 to 1 At repetition rates from 20/s to 100/s
At duty cycles from 0.001 to 0.1
Typical measurement errors of peak hold circuit with spreadspectrum signals 18)
Temperature coefficient 15)
Measurement time/averaging factor 16) Values in ( ) for high resolution setting
same as for average power measurement, plus measurement error of peak hold circuit
from 200 µs {4 kHz}: ±(3 % of rdg + 0.05 W) 10) from 4 µs {200 kHz}: ±(7 % of rdg + 0.2 W) 10) from 2 µs {“FULL”}: ±(7 % of rdg + 0.4 W) 10)
from 200 µs {4 kHz}: ±(3 % of rdg + 0.05 W) 10) from 4 µs {200 kHz}: ±(3 % of rdg + 0.2 W) 10) from 1 µs {“FULL”}: ±(7 % of rdg + 0.4 W) 10) from 0.5 s {“FULL”}: ±(12 % of rdg + 0.4 W) 10)
add ±(1.6 % of rdg + 0.15 W)
add ±(1.6 % of rdg + 0.15 W)
add ±0.10 W {200 kHz, “FULL”}
add ±0.10 W {200 kHz, “FULL”}
add ±0.05 W {4 kHz}
add ±0.05 W {4 kHz}
cdmaOne, DAB 12): ±(5 % of rdg + 0.4 W)
CDMA2000® (3X) 13), WCDMA 14), DVB-T:
±(15 % of rdg + 0.4 W)
40 MHz to 1 GHz: 0.35 %/K (0.015 dB/K) 25 MHz to 40 MHz: 0.50 %/K (0.022 dB/K)
0.3 GHz to 4 GHz: 0.35 %/K (0.015 dB/K) 0.2 GHz to 0.3 GHz: 0.50 %/K (0.022 dB/K)
PEP measurement only (not possible in combination with the R&S®NRT2): 0.17 (0.27) s/1 (4) {4 kHz, 200 kHz} 0.30 (0.44) s/4 (8) {“FULL”}
with simultaneous reflection measurement: 0.47 (1.14) s/1 (4) {4 kHz, 200 kHz} 1.14 (2.04) s/4 (8) {“FULL”}
Complementary cumulative distribution function measurement (CCDF)
Definition
probability in % of forward power envelope exceeding a specified threshold (only with 1 2 forward direction)
Measurement range
0 % to 100 %
Measurement uncertainty from +18 °C to +28 °C
0.2 % 20)
Threshold level range
1 W to 300 W
1 W to 300 W
Rohde & Schwarz R&S®NRT Power Reflection Meter Family 9
Forward power in W Forward power in W
Error limits in dB
R&S®NRT-Z14/-Z44 directional power sensors
R&S®NRT-Z14
R&S®NRT-Z44
Accuracy of threshold level at +18 °C to +28 °C
Measurement time/averaging factor 16) Values in ( ) for high resolution setting
±(5 % of threshold level in W + 0.5 W)
±(5 % of threshold level in W + 0.5 W)
CCDF measurement only 19): 0.26 (0.37) s/1 (4) with simultaneous reflection measurement (not possible in combination with the R&S®NRT2): 0.7 (1.6) s/1 (4)
Reflection measurement 4) Values in { }: 3 GHz to 4 GHz
Definition
measurement of load match in terms of SWR, return loss, or reflection coefficient
Reflection measurement range
Return loss
0 to 23 dB
0 dB to 23 {20} dB
SWR
1.15 to
1.15 {1.22} to
Reflection coefficient
0.07 to 1
0.07 {0.10} to 1
Min. forward power
0.06 [0.3] W (specs met from 0.4 [2] W)
0.03 [0.3] W (specs met from 0.2 [2] W)
Measurement uncertainty
see diagram
Measurement time/averaging factor same as measurement time of selected power measurement function, lowest with average power measurement
Figures
Maximum forward power of the R&S®NRT-Z44 directional power sensors (for both directions)
Maximum forward power of the R&S®NRT-Z14 directional power sensor (for both directions)
Measurement error limits (two standard deviations) for reflection measurements with the R&S®NRT-Z14/ -Z44 directional power sensors
1000
Peak (max. 10 ms), SWR 3
800
600
Avg 10 ºC to +35 ºC, SWR 1.5
400
Avg 10 ºC to +35 ºC, SWR 3
Avg 10 ºC to +50 ºC, SWR 3 200
1000
Avg 10 ºC to +35 ºC,
800
SWR 1.5
600
Avg 10 ºC to +35 ºC, SWR 3
400
Avg 10 ºC to +50 ºC, SWR 3 200
Peak
6
(max. 10 ms)
SWR 3
4
2
0
2
¸NRT-Z14 ¸NRT-Z44 ( 3 GHz)
¸NRT-Z44 (3 GHz to 4 GHz)
100 0.2
0.4
0.7 1
100
2
34
25 100
205
Frequency in GHz
4
0
5
10
15
20
25
400
600 800 1000
Return loss in dB
Frequency in MHz
Min. forward power (forward direction 1 2): R&S®NRT-Z14: 0.4 W;
R&S®NRT-Z44: 0.2 W
R&S®NRT-Z14/-Z44 directional power sensors
Measurement channels
Forward direction
1 2
2 1
Measurement functions
Power parameters
Reflection parameters Range selection
Video bandwidth
Frequency response correction Zero adjustment RF connectors
2 (for forward and reverse power)
standard for all measurement functions
only for measurement of average power and average burst power (at lower levels)
forward power and reflection
average power, average burst power, peak envelope power, peak-to-average ratio, complementary cumulative distribution function return loss, SWR, reflection coefficient, reverseto-forward power ratio in %, reverse power
automatic 4 kHz, 200 kHz and “FULL” (600 kHz for the R&S®NRT-Z14, 4 MHz for the R&S®NRT-Z44) for all power parameters except for the measurement of the average power on input of RF frequency, the stored correction factors are taken into account on remote command with RF power switched off, duration approx. 5 s
N (female) on both ends
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R&S®NRT-Z14/-Z44 directional power sensors Remote control
RS-422 serial interface
Command set Environmental conditions Temperature
operating temperature range permissible temperature range storage temperature range
Damp heat
Altitude Mechanical resistance
operating or nonoperating
Vibration
sinusoidal
random
Shock Product conformity Electromagnetic compatibility
RoHS General data Power supply Length of connecting cable Maximum length of extension cable
Cable plug
EU: in line with EMC Directive 2014/30/EU EU: in line with Directive 2011/65/EU on the restriction of the use of certain hazardous substances in electrical and electronic equipment
operation via R&S®NRT2 operation via R&S®NRT-Z5
Dimensions
Weight Calibration interval
W × H × D
4.8/9.6/19.2 kbit/s or 38.4 kbit/s, 1 start bit, 8 data bits, 1 stop bit, no parity, XON/XOFF handshake proprietary (not SCPI-compliant)
0 °C to +50 °C (unless otherwise stated) 10 °C to +55 °C 40 °C to +70 °C +25 °C/+40 °C, 95 % rel. humidity, cyclic, in line with EN 60068-2-30 with restrictions: noncondensing max. 4600 m
5 Hz to 55 Hz, 0.15 mm amplitude const., 55 Hz to 150 Hz, acceleration 0.5 g const., in line with EN 60068-2-6 10 Hz to 500 Hz, acceleration 1.9 g (RMS), in line with EN 60068-2-64 40 g shock spectrum, in line with MIL STD-810E, method 516.4, procedure I
applied harmonized standards: EN 61326-1 (industrial environment) EN 55011 (class B)
EN IEC 63000
6.5 V to 28 V, approx. 1.5 W 1.5 m 500 m (approx. 1640 ft) 21) 30 m (approx. 100 ft) LEMO S series, FFP model, size 2, 6-pole plug (1: RXD+, 2: RXD-, 3: V , 4: GND, 5: TXD-,
SUPPLY
6: TXD+) 120 mm × 95 mm × 39 mm (4.72 in × 3.74 in × 1.54 in) 0.65 kg (1.43 lb) 2 years
R&S®NRT2 power reflection meter Application Sensors Sensor input
Frequency range Power measurement range
connector
power reflection meter
R&S®NRT-Z14, R&S®NRT-Z43, R&S®NRT-Z44
one sensor input on front panel LEMO S series, ERA model, size 2, 6-pole receptacle (1: RXD+, 2: RXD-, 3: VSUPPLY, 4: GND, 5: TXD-, 6: TXD+) 25 MHz to 4 GHz (sensor-dependent) 0.0007 W to 120 W (average), max. 300 W (peak) (sensor-dependent)
Rohde & Schwarz R&S®NRT Power Reflection Meter Family 11
R&S®NRT2 power reflection meter Measurement functions
Power Forward power
Reflection Measurement conditioning and filtering Frequency response correction Zero adjustment Averaging filter
Maximum/minimum Measurement uncertainty Display Manual operation Remote control Systems Command set IEC/IEEE bus (R&S®NRT2-B8 option) USB
LAN
Measurement time Analog outputs and trigger I/O Out 1/Trig Out
Out 1/Trig Out (cont.)
parameters display
absolute relative parameters
automatic user-selectable
resolution
interface functions connector connector supported protocols connector supported protocols
Out 1 (analog output 1) output voltage range output resistance accuracy of no-load output voltage resolution update rate
Trig Out (trigger output) high-level output voltage low-level output voltage output impedance
connector
forward power or power absorbed by the load average power, average burst power, peak envelope power, peak-to-average ratio (crest factor), complementary cumulative distribution function
in W, dBm and dBµV in dB, as change in percent ( %) or as quotient SWR, return loss, reflection coefficient, reverseto-forward power ratio in %, reverse power
on input of RF frequency, the stored correction factors are taken into account selectable with RF power switched off, duration approx. 5 s automatic or user-selectable dependent on selected resolution of the measurement result and characteristics of the sensor 1, 2, 4, 8, 16, 32, 64, 128, 256 display of current maximum, minimum or difference (max. min.) see sensor specifications 127 mm (5″) TFT color display 800 × 480 pixel (WVGA) via capacitive touch panel and/or keypad
IEC 60625.1 (IEEE 488.1) IEC 60625.2 (IEEE 488.2) SCPI-1999.0 SH1, AH1, T6, L4, SR1, RL1, PP1, DC1, DT1, C0 24-pin Amphenol (female) USB 2.0 high-speed USB type B receptacle USBTMC via VISA 10/100/1000BASE-T RJ-45 modular socket VXI-11, HiSLIP, SCPI-RAW add 50 ms to sensor specifications
recorder output; user-definable linear relationship to measurement result 0 V to 2.5 V (no load) 600 (nom.) ±(0.4 % of output voltage + 4 mV) 16 bit same as result rate of sensor signaling output; user-definable logic levels for the PASS and FAIL states in the case of limit monitoring (5.1 ± 0.2) V ( 10 k load) 2.6 V (nom.) (50 load) 0 V to 0.4 V (meas.) (5 mA sink current) 50 (nom.) BNC (female)
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R&S®NRT2 power reflection meter
Trig In/Out 2
USB host ports
Firmware update Environmental conditions Temperature
Damp heat Altitude Mechanical resistance Vibration
Shock Power rating Rated voltage Rated frequency Rated current (including options, connected sensors, and connected USB devices) Product conformity Electromagnetic compatibility
Electrical safety
RoHS Dimensions Weight
Trig In (trigger input) input impedance absolute minimum voltage absolute maximum voltage low-to-high input threshold high-to-low input threshold
Out 2 (analog output 2) electrical characteristics
connector
connector
input for trigger signals to sensor (rising edge is translated to RTRG command) 10 k/50 (nom.) selectable -3 V 6 V (with 10 k input impedance) 4 V (with 50 input impedance) (1.8 ± 0.3) V
(1.15 ± 0.25) V
recorder output; user-definable linear relationship to measurement result
see Out 1
BNC (female)
two USB 2.0 high-speed host ports (one on front panel, one on rear panel)
USB type A receptacle
from the R&S®NRP toolkit via LAN or USBTMC using a Windows program; VISA installation is required
operating temperature range permissible temperature range storage temperature range
operating or nonoperating
0 °C to +50 °C (unless otherwise stated)
10 °C to +55 °C 40 °C to +70 °C +25 °C/+55 °C, 95 % rel. humidity, cyclic, in line with EN 60068-2-30 with restrictions: noncondensing max. 4600 m
sinusoidal random
5 Hz to 55 Hz, 0.15 mm amplitude const., 55 Hz to 150 Hz, acceleration 0.5 g const., in line with EN 60068-2-6
10 Hz to 500 Hz, acceleration 1.9 g (RMS), in line with EN 60068-2-64
40 g shock spectrum, in line with MIL-STD-810E, method 516.4, procedure I
nominal voltage voltage range nominal frequency frequency range
at 100 V AC
at 240 V AC
100 V to 240 V 90 V to 264 V 50 Hz to 60 Hz or 400 Hz 47 Hz to 63 Hz or 380 Hz to 420 Hz
max. 1.7 A
max. 0.8 A
EU: in line with EMC Directive 2014/30/EU
EU: in line with Low Voltage Directive 2014/35/EU USA Canada EU: in line with Directive 2011/65/EU on the restriction of the use of certain hazardous substances in electrical and electronic equipment
W × H × D
without any options installed
applied harmonized standards: EN 61326-1 (industrial environment) EN 61326-2-1 EN 55011 (class B) EN 61000-3-2 EN 61000-3-3
applied harmonized standard: EN 61010-1
UL 61010-1 CAN/CSA-C22.2 No. 61010-1
EN IEC 63000
234 mm × 106 mm × 272 mm (9.21 in × 4.17 in × 10.71 in) 2.35 kg (5.18 lb)
Rohde & Schwarz R&S®NRT Power Reflection Meter Family 13
R&S®NRT-Z5 USB interface adapter Application Sensor input
Environmental conditions Temperature
Damp heat Altitude Product conformity Electromagnetic compatibility
RoHS
Dimensions Weight
connector
for connecting an R&S®NRT power sensor to a PC via USB
one sensor input
LEMO S series, EBC model, size 2, 6-pole receptacle (1: RXD+, 2: RXD-, 3: VSUPPLY, 4: GND, 5: TXD-, 6: TXD+)
operating temperature range storage temperature range
operating or nonoperating
0 °C to +60 °C 40 °C to +70 °C max. 90 % rel. humidity, with restrictions: noncondensing max. 4600 m
EU: in line with EMC Directive 2014/30/EU
EU: in line with Directive 2011/65/EU on the restriction of the use of certain hazardous substances in electrical and electronic equipment W × H × D (without protruding sensor connector)
applied harmonized standards: EN 55022 (class B) EN 55024
EN IEC 63000
60 mm × 35 mm × 89 mm (2.36 in × 1.38 in × 3.50 in) 0.30 kg (0.66 lb)
ORDERING INFORMATION
Designation Base unit
Power reflection meter Options GPIB/IEEE488 interface Directional power sensors
120 (300) W, 25 MHz to 1 GHz 120 (300) W, 0.2 GHz to 4 GHz Acessories Extension cable for R&S®NRT-Zxx power sensors, length: 10 m Extension cable for R&S®NRT-Zxx power sensors, length: 30 m USB interface adapter 19″ rack adapter (for one R&S®NRT2 power reflection meter and one empty casing) 19″ rack adapter (for two R&S®NRT2 power reflection meters)
Type
R&S®NRT2
R&S®NRT2-B8
R&S®NRT-Z14 R&S®NRT-Z44
R&S®NRT-Z2 R&S®NRT-Z2 R&S®NRT-Z5 R&S®ZZA-KNA22 R&S®ZZA-KNA24
Order No.
1430.0509.02
1430.0105.02
1444.0006.02 1444.0012.02
1081.2505.10 1081.2505.30 1400.6909.02 1177.8184.00 1177.8149.00
Warranty
Base unit and power sensors All other items 1) Service options Extended warranty, one year Extended warranty, two years Extended warranty with calibration coverage, one year Extended warranty with calibration coverage, two years Extended warranty with accredited calibration coverage, one year Extended warranty with accredited calibration coverage, two years
R&S®WE1 R&S®WE2 R&S®CW1 R&S®CW2 R&S®AW1 R&S®AW2
3 years 1 year
Please contact your local Rohde & Schwarz sales office.
1) For options installed, the remaining base unit warranty applies if longer than 1 year. Exception: all batteries have a 1 year warranty.
14
1) Depends on measurement function and direction. 2) Ratio of measured forward and reverse power in dB with perfectly matched load. 3) Specifications apply to measurement of forward power. 4) Values in [ ]: 2 1 forward direction (if different from 1 2 forward direction). 5) Power measurement below the specified limits is possible at the expense of increased influence of zero offset. 6) Measurement of average power up to the CW limits is possible at the expense of increased measurement errors. 7) Increased uncertainty with a coverage factor of k = 2. For normal distribution, this coverage factor has a coverage probability of 95 %. 8) With matched load (SWR max. 1.2) under consideration of the carrier frequency which must be input for an accuracy of 1 %; measurement results referenced to the load
end of the sensor, averaging filter set to automatic mode (high resolution). The influence of the carrier harmonics can be ignored provided they are below -30 dBc up to 5 GHz. With an SWR of more than 1.2 on the load end, the influence of directivity on the measured forward power is to be considered. The associated increased uncertainty with a coverage factor of k = 2 is equal to 6 % of rdg (0.25 dB) × the load reflection coefficient. Example: a mismatched load with 3.0 SWR yields a 0.5 reflection coefficient, producing an additional uncertainty of 3 % of rdg (0.13 dB). The overall measurement uncertainty will be increased to 4.4 % of rdg (0.19 dB). 9) With matched load (SWR max. 1.2) under consideration of the carrier frequency which must be input for an accuracy of 1 %; measurement results referenced to the load end of the sensor, averaging filter set to automatic mode (high resolution). The influence of harmonics of the carrier can be neglected provided they are below -30 dBc up to 4 GHz, -35 dBc from 4 GHz to 10 GHz and -60 dBc above 10 GHz. With an SWR of more than 1.2 on the load end, the influence of directivity on measured forward power is to be considered. The associated increased uncertainty with a coverage factor of k = 2 equals 6 % of rdg (0.25 dB) × load reflection coefficient for carrier frequencies up to 3 GHz and 10 % of rdg (0.4 dB) × load reflection coefficient from 3 GHz to 4 GHz. Example: a mismatched load with 3.0 SWR yields a 0.5 reflection coefficient leading to an additional uncertainty of 3 % of rdg (0.13 dB) in the frequency range up to 3 GHz. Overall measurement uncertainty will be increased to 4.4 % of rdg (0.19 dB). 10) After zero adjustment. 11) In the temperature range from +18 °C to +28 °C; relative to a CW signal. The error depends on the modulation parameters for each case, e.g. the modulation frequency with AM and the individual sensor characteristics. The specified tolerances refer to 1 2 forward direction and a power of 120 W (R&S®NRT-Z44). With burst signals, the specified errors refer to an average burst power of 120 W (R&S®NRT-Z14/-Z44). Since errors due to modulation are proportional to power, they become smaller the lower the power: a WCDMA signal with an average power of 30 W, for example, will only cause a very small error of about ±0.5 % of the R&S®NRT-Z44 sensor with modulation correction switched on. 12) With modulation correction switched on. 13) With modulation correction switched on (same as WCDMA); chip rate set to 3.6864 Mchip/s. 14) Signal similar to test model 1 with 64 channels for downlink with 3.84 Mchip/s in line with 3GPP standard 3G TS 25.141 V3.1.0 (2000-03); modulation correction switched on, chip rate set according to test signal. 15) Statistically distributed with a mean value of 0 %/K, the stated temperature coefficients correspond to approximately two standard deviations. Temperature coefficients must be considered for calculation of measurement uncertainty below +18 °C and above +28 °C. Example: at +5 °C and 1 GHz, a temperature drift of (18 – 5) × 0.25 % = 3.25 % of rdg (0.14 dB) for average power measurement can be expected relative to +18 °C. Combined with the measurement uncertainty of 3.2 % from +18 °C to +28 °C, the overall uncertainty will be 4.6 % of rdg (0.19 dB). 16) Typical values; measured with R&S®NRT-Z5, average time of 100 measurements. Measurement results settled with power-dependent (automatic) averaging. Each measurement time is defined as the time from the input of the trigger command up to the termination of the return string (baud rate 38.4 kbit/s). All measurement results consist of two measured values: one for the forward power measurement function and one for the selected reflection parameter (SWR, return loss, reflection coefficient or reflected power). 17) After zero adjustment, unmodulated burst signal with rectangular envelope. The burst power must be at least 4 W for the R&S®NRT-Z14 and the R&S®NRT-Z44. For the R&S®NRT-Z44, the burst width must be > 2 ms {4 kHz}, > 40 µs {200 kHz} and > 5 µs {“FULL”}. For the R&S®NRT-Z14, the burst width must be > 2 ms {4 kHz}, > 40 µs {200 kHz} and > 10 µs {“FULL”}. Since the measurement uncertainty is inversely proportional to the burst width and the power, it may be smaller or higher for other waveforms. 18) In the temperature range from +18 °C to +28 °C; video bandwidth “FULL”, PEP defined as power with a CCDF value < 106. 19) Setting must be initiated with a “rev:pow” command in addition to the setting command for the forward measurement function via the remote interface of the sensor. Since the sensor measures average reverse power with this setting (a parameter normally not of interest in combination with any function other than average power measurement), the setting is denoted as “PEP measurement only” or “CCDF measurement only”. 20) After zero adjustment, unmodulated burst signal with rectangular envelope, threshold value set to half the burst power. The burst power must be at least 4 W for the R&S®NRT-Z44. For the R&S®NRT-Z44, the repetition rate must be < 50/s {4 kHz}, < 2500/s {200 kHz}, and < 20000/s {“FULL”}. For the R&S®NRT-Z14, the repetition rate must be < 50/s {4 kHz}, < 2500/s {200 kHz} and < 10000/s {“FULL”}. Since the measurement uncertainty is proportional to the repetition rate and inversely proportional to the power, it may be smaller or higher for other waveforms. For spread spectrum signals such as cdmaOne, CDMA2000®(3x), WCDMA, DAB and DVB-T, the measurement uncertainty is optimally described by an uncertainty for the threshold setting. This uncertainty is taken into account in addition to the specified value. With modulation correction switched on, this additional uncertainty is approx. 5 % of the power value in W for the aforementioned standards. 21) Using double-shielded twisted pair cable with a characteristic impedance of 100 and a cross section of 0.22 mm2 (24 AWG) for the data lines is recommended to achieve the advertised performance and electromagnetic immunity. Minimizing voltage drop can require a larger cross section of e.g. 0.5 mm2 (20 AWG) for the power supply lines.
CDMA2000® is a registered trademark of the Telecommunications Industry Association (TIA-USA).
Rohde & Schwarz R&S®NRT Power Reflection Meter Family 15
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5215098612
5215.0986.12 05.00 PDP/PDW 1 en
R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG
Trade names are trademarks of the owners
PD 5215.0986.12 | Version 05.00 | March 2022 (sk) R&S®NRT Power Reflection Meter Family
Data without tolerance limits is not binding | Subject to change © 2017 – 2022 Rohde & Schwarz GmbH & Co. KG | 81671 Munich, Germany
Documents / Resources
 |
ate corp NRT2 NRT Power Reflection Meter [pdf] Instruction Manual NRT2, NRT-Zxx, NRT2 NRT Power Reflection Meter, NRT2 NRT, Power Reflection Meter, Reflection Meter, Meter |