JUNTEK JDS2900 Series Dual-Channel Function Arbitrary DDS Signal Generator

 

INSTALLATION INSTRUCTIONS

Check
When you get a new JDS2900 series dual-channel signal generator, it is recommended that you follow the steps below to check the instrument.

Check the package
If the package is damaged, keep the damaged packaging or shockproof material until the goods have been fully inspected and the instrument has passed electrical and mechanical tests. If the instrument is damaged due to shipping, please contact the shipper and the carrier for compensation.

Check accessories
The contents of accessories are as follows. If the contents do not match or the instrument is damaged, contact the dealer or the company.

• Host: JDS2900 Series Dual Channel 1pcs
• Signal Generator
• Accessories: Power Adapter 1pcs
• USB cable 1pcs
• Signal connection cable 2pcs
• User manual 1pcs

Check the whole machine
If you find that the instrument is damaged, the instrument is not working properly, or fails the performance test, contact your dealer or our company.

Contact Us
If you have any problem or requirement when using our products or this manual, please contact JUNTEK.

• E-mail: junce@junteks.com
• Website: www.junteks.com
• Software and communication protocol download links:

Instrument introduction

JDS2900 series function generator can generate multiple waveforms such as sine wave, square wave, triangle wave, pulse wave, and arbitrary wave. The frequency range up to 60MHz, with duty cycle adjustment, sweep frequency, frequency signal frequency and counter function, and the output signal, amplitude, and frequency can be displayed simultaneously. The series signal generator has excellent amplitude and frequency characteristics, the appearance of this instrument is exquisite and beautiful. This instrument is widely used in factories, schools, research institutes and laboratories.

The model description
This series of instruments are divided into three models, the main difference is the maximum frequency of sine wave output, as described below:

Model	The max output frequency of sin wave
JDS2900-60M	60MHz
JDS2900-50M	50MHz
JDS2900-40M	40MHz
JDS2900-30M	30MHz
JDS2900-15M	15MHz

Technical parameters

Frequency characteristics
	JDS2900 -15M	JDS2900 -30M	JDS2900 -40M	JDS2900 -50M	JDS2900 -60M
Sine wave frequency range	0~15MHz	0~30MHz	0~40MHz	0~50MHz	0~60MHz
Square wave frequency range	0~15MHz	0-25MHz	0-25MHz	0-25MHz	0-25MHz
Triangle wave frequency range
Pulse wave frequency range	0~6MHz	0~6MHz	0~6MHz	0~6MHz	0~6MHz
TTL digital wave frequency range
Arbitrary frequency range
Pulse width adjustment range	100nS~4000S	50nS~4000S	40nS~4000S	30nS~4000S	25nS~4000S
Square wave rise time	≤25ns	≤15ns	≤10ns	≤10ns	≤10ns
Minimum frequency resolution	0.01uHz（0.00000001Hz）
Frequency accuracy	±20ppm
Frequency stability	±1ppm/3hours ±1ppm/3 hours

Waveform characteristics
Waveform type	Sine、Square、pulse (adjustable duty cycle, precise adjustment of pulse width and period), triangular wave, partial sine wave, CMOS wave, DC level (set DC amplitude by adjusting offset), half wave, full Wave, positive staircase wave, anti-ladder wave, noise wave, exponential rise, exponential drop, multisonic wave, Symplectic pulse and Lorenz pulse and 60 arbitrary waveforms
Wave length	2048 points
Waveform sampling rate	266MSa/s
Waveform vertical resolution	14-bits
Sine wave	Harmonic Suppression	≥45dBc(<1MHz); ≥40dBc(1MHz~20MHz)
	Total harmonic distortion	<1%(20Hz~20kHz,0dBm)
Square wave and pulse wave	Overshoot	≤5%
Pulse wave	Duty cycle adjustment range	0.1%~99.9%
Partial sine wave	Duty cycle adjustment range	0.1%~99.9%
Sawtooth wave	Linearity	≥98%(0.01Hz~10kHz)

Output characteristics
Sine wave amplitude range	Frequency ≤ 10MHz	10MHz ≤ Frequency ≤ 30MHz		30MHz ≤ Frequency
	2mVpp~20Vpp	2mVpp~10Vpp		2mVpp~5Vpp
Square wave 、Triangle wave amplitude range	Frequency ≤ 10MHz		10MHz ≤Frequency ≤25MHz
	2mVpp~20Vpp		2mVpp~5Vpp
Amplitude resolution	1mV
Amplitude stability	±0.5%/5 hours
Flatness of amplitude	±5%(<10MHz); ±10%(>10MHz)
Waveform output
Output impedance	50Ω±10% (typical)
Protection	All signal outputs can work within 60 when the load is short-circuited.
DC offset
Offset adjustment range	Output amplitude > 2V	0.2V <Output Range ≤ 2V		0<Output amplitude ≤0.2V
	-9.99V~9.99V	-2.5V~2.5V		-0.25V~0.25V

Offset resolution	0.01 V
Phase characteristics
Phase adjustment range	0~359.9o
Phase resolution	0.1o
TTL/CMOS output
Low level	<0.3V
High level	1V~10V
Level rise/fall time	≤20ns
External measurement function
Frequency meter function	Frequency measurement range	1Hz~100MHz
	Measurement accuracy	Gate time 0.01S~10s continuous adjustment
Counter function	Counting range	0-4294967295
	Coupling method	DC and AC coupling methods

	Counting method	Manually
Input signal voltage range	2Vpp~20Vpp
Pulse width measurement	0.01us resolution, maximum measurable 20s
Period measurement	0.01us resolution, maximum measurable 20s
Sweep function
Sweep channel	CH1 or CH2
Sweep type	Linear sweep, logarithmic sweep
Sweep time	0.1s~999.9s
Setting range	Any setting between the maximum output frequency of the corresponding model of the starting point (0.01Hz) and the end point
Sweep direction	Forward, reverse and round trip
Bursting function
Number of pulses	1-1048575
Burst mode	Manual burst, CH2 burst, external burst (AC), external burst (DC)
General specifications

Display	Display type	2.4 inch TFT color LCD display
Store and load	Quantity	100
	Position	00 to 99 (00 memory location parameter is loaded by default as power on)
Arbitrary wave	Quantity	1 to 60 total 60 groups (15 groups by default as power on)
Interface	Interface mode	USB to serial interface
	Extension interface	With TTL level mode serial interface for user secondary development
	Communicat ion speed	Adopt standard 115200bps
	Protocol	Using the command line, the protocol is made public
Power supply	Voltage range	DC5V±0.5V
Manufacturing technology	Surface mount technology, large-scale integrated circuits, high reliability, long service life
Prompt tone	Users can turn on or off by setting program
Operating characteristics	All key operations, knob continuous adjustment
Environmental conditions	Temperature: 0~40 oC Humidity: <80%

Instrument Description

The front panel overview

The display interface description

1. CH1 pa,~ler
2. CH2 par-ter
3. Wavefor■ Display
4. Cunent Channel Output Stalus
5. Soft – key •mu bar
6. The phase d iffe.rence between CH1 a.nd Cff2

The key function description

Item	Instructions
Function soft keys	Function soft-key activates the corresponding function on the screen
(wA	Press(w  A     button to display main interface or waveform selection and cancel
(MEAS]	Fast switching between measurement mode interface and main interface
	Fast switching between modulation mode interface and main interface
§]	Fast switching between system setting interface and main interface
(OK ]	The main interface is used to control the simultaneous output of channel 1 and channel 2, and in other interface,  [   OK]   key is used to control (ON/OFF).
mw	When setting parameters, you can use left and right keys to move the cursor position.
( CHl )	Select the CH1 channel to control the output of CH1, long press to set CH1 as the main display.
( CH2)	Select the CH2 channel to control the output of CH2, long press to set CH2 as the main display.

Operation Instructions

After power on, first enter the welcome interface and then jump to the language selection interface. Press the corresponding soft key to select the language and finally enter the main interface. After you turn on the computer again, you do not need to repeat the language selection and go directly to the main interface.

Set the parameters in the main interface and output waveform

• Press button to turn the output on or off simultaneously for both channels.
• Output channel selection: The front panel , keys are used to switch the currently selected channel (CH1 or CH2). Pressing , keys again in the currently selected channel can turn on/off the output of the channel, and long press to place the current channel on the main display of the screen. (upper part).
• Set the waveform: press the front panel key to activate the waveform switching of the current channel. In the active state of the waveform, the knob can be quickly switched, and the direction key can be used to quickly switch between the arbitrary waveform and the preset waveform.
• Set Frequency: Press the soft key to highlight the “Frequency” parameter. At this time, use the direction keys to move the cursor to select the bit to be edited. Then turn the knob to change the value. Press and hold the soft key to change the frequency unit (MHz, KHz, Hz, mHz). , uHz).
• Press and hold the duty cycle, offset, and phase soft－keys to initialize to default values.

MEAS measurement mode interface parameter settings
Press and press the soft key in the measurement mode interface to switch between the measurement function and the count function. You can also rotate the encoder to switch.

Measurement function
The input signal frequency, period, positive pulse width, negative pulse width, duty cycle and other parameters can be measured, the measurement frequency range 1Hz-100MHz, the measurement signal amplitude range is 2mVpp-20Vpp, the input interface is Ex

• Coupling setting: Press to switch the coupling mode to AC or DC.
• Gate time setting: Pressto set the gate time (0.01S-10S), use the arrow keys to move the cursor to select the bit to be edited, then turn the knob to adjust the value.
• Measurement mode setting: Press to switch between the two options of counting frequency and counting period via the encoder.
• Measurement parameters: frequency, period, positive pulse width, negative pulse width, duty cycle.

Counting function

The period number of the input signal can be calculated in real time

• Coupling setting: Press to switch the coupling mode to AC or DC.
• After setting all the items, press the soft key to start the counting function

MOD modulation mode interface parameter settings

• Press to enter the modulation mode, press the soft key in the modulation mode interface to switch between the sweep function (CH1 channel / CH2 channel), pulse function (CH1 channel) and burst function (CH1 channel).

Sweep function
Sweep frequency, you can set any starting point frequency and end point frequency in the signal generator output frequency range, sweep time 0.1s~999.9s, sweep type is linear scan, logarithm scan two scan methods, sweep frequency direction is positive , Reverse and Round Trip Three Sweep Directions;

• In the sweep function (CH1 channel), press the soft key to select the starting point frequency, end point frequency, sweep time, sweep direction and sweep mode. After the item is highlighted, use the arrow keys (or press the soft
  • key ) and the knob to edit the item’s parameters.
• After setting all the items, press the soft key press the key to start the sweep function and to stop.

pulse function
You can adjust pulse wave pulse width and pulse period time digitally, which is more accurate than adjusting the duty cycle;

• In the pulse function (CH1 channel), press the soft key to select the pulse width, period, offset, and amplitude. After this item is highlighted, edit the item parameters by pressing the arrow keys (or press the soft key ) and rotating the knob. , pulse width and period units can be switched between ns and us by pressing the key when the item is highlighted.
• After setting all the items, press the soft key to start the sweep function and press the key to stop

Bursting function
The pulse train can be set to output 1-108575 periods. The burst mode is divided into internal CH2 channel bursts, external input signal bursts, and manual bursts. It should be noted that the period time of the burst train is less than the burst signal period time.

• In the burst function (CH1 channel), press the soft key to select the number of pulses and the burst mode. After this item is highlighted, use the arrow keys (or press the soft key ) and the knob to edit the item parameters.
• After setting all the items, press the soft key to start the sweep function and press the key to stop.

System settings and interface parameter settings
Press the key to enter the system setting interface. Press the soft key to select the parameters for the in/out position, sound setting, brightness adjustment, language setting, synchronization function setting, and arbitrary wave display quantity setting.

• Call Out & Save: Save/recall the current waveform parameters to the specified position, rotate the knob to adjust to the specified position. Press the corresponding soft key when you want to recall, save, or clear.
• Sound settings: Sounds can be turned on and off with keys 、.
• Brightness adjustment: Brightness adjustable from 0 to 12 levels can be quickly adjusted by rotating encoder.
•  Language setting: Available by pressing 、to select English and Chinese display.
•  Synchronization: The CH1 channel is used as the operation target during synchronization. The parameters of the CH2 channel change following the CH1 channel parameters. When the synchronization item is highlighted, press the key or rotate knob to select the item to be synchronized (frequency, waveform, amplitude, duty cycle, offset), press the soft key to select it, and press the soft key to cancel.
• Arbitrary waveform number setting: The number of arbitrary waveforms of the main interface waveform can be quickly adjusted by rotating the encoder (1-60).

Documents / Resources

JUNTEK JDS2900 Series Dual-Channel Function Arbitrary DDS Signal Generator [pdf] User Guide JDS2900, Series Dual-Channel Function Arbitrary DDS Signal Generator

References

• User Manual