FCC Test Report

Issued For

Issued By: Flux Compliance Service Laboratory
Add: Room 105 Floor Bao hao Technology Building 1 NO.15 Gong ye West Road Hi-Tech Industrial, Song shan lake Dongguan
Tel: 769-27280901 Fax: 769-27280901 http://www.fcs-lab.com

Test Result Certification

This report certifies that the Xtuga E-COMMERCE CORP. wired microphone converter (Model: SF-1) has been tested by Flux Compliance Service Laboratory and found to be in compliance with FCC Rules and Regulations Part 15 Subpart C section 15.236 and ANSI C63.10:2013 requirements. The test results are applicable only to the tested sample identified in this report. This document may not be reproduced in full without written approval from FCS.

Product Description

Test Details

Summary of Test Results

The following table summarizes the compliance status of the Xtuga SF-1 wired microphone converter with FCC Part 15 Subpart C section 15.236 requirements:

Note: (1) "N/A" denotes test is not applicable in this Test Report. (2) All tests are according to ANSI C63.10:2013.

General Information of the EUT

The EUT (Equipment Under Test) is a wired microphone converter, model SF-1, manufactured by Xtuga E-COMMERCE CORP. It operates within the frequency range of 572MHz-596MHz using FM modulation. The device features a spring antenna with a gain of -2.71 dBi and is powered by a DC 3.7V 800mAh battery.

Channel List

The following channels are available for operation:

Description of the Test Modes

To investigate the maximum EMI emission characteristics, the EUT was pre-scanned based on various operation and test configuration modes. The test software used was "FCC tools" to control the EUT in continuous TX mode and select test channels. All test modes were evaluated, and only the worst-case results are recorded in this report. A new battery was used during testing.

Necessary Accessories and Support Units

The EUT was tested as an independent unit with the following accessories and support units:

Necessary Accessories

Support Units

No specific support units were listed beyond the adapter for testing purposes.

Equipments List

The following equipment was used for radiation, conduction, and RF connected tests, with calibration dates ensuring validity until August 28, 2024.

Radiation Test Equipment

Conduction Test Equipment

RF Connected Test Equipment

Maximum Radiated Power

Limit

As per FCC 15.236(d), in the bands allocated and assigned for broadcast television and in the 600 MHz service band, the Equivalent Isotropically Radiated Power (EIRP) shall not exceed 50 mW.

Test Procedure

The EUT's antenna output was connected to a power sensor via an RF cable and attenuator.

Test Setup

A diagram illustrates the test setup: The EUT is connected to a power meter. This setup is used to measure the radiated power directly from the EUT's antenna output.

Test Results (ANT 1)

Occupied Bandwidth

Limit

One or more adjacent 25KHz segments within the assignable frequencies may be combined to form a channel whose maximum bandwidth shall not exceed 200 kHz. The operating bandwidth shall not exceed 200 kHz.

Test Procedure

The test procedure involved setting the spectrum analyzer parameters as follows: Detector: Peak/AV, Sweep time: Auto, Resolution bandwidth: 1% to 5% of the occupied bandwidth, Video bandwidth: 3 x resolution bandwidth, Span: 2 x emission bandwidth, Trace mode: Max. hold, Analyzer function: 99% power occupied bandwidth function. The EUT was modulated with max(FM, 2.5kHz tone) frequency deviation.

Test Setup

A diagram shows the EUT connected to a Spectrum Analyzer. This setup is used to measure the occupied bandwidth.

Test Results

Spectrum analyzer plots for the Low (572.2 MHz), Middle (582.7 MHz), and High (595.9 MHz) channels demonstrate the occupied bandwidth. For the Low channel, the occupied bandwidth was 91.472 kHz with a transmit frequency error of -104 Hz. For the Middle channel, the occupied bandwidth was 91.247 kHz with a transmit frequency error of -335 Hz. For the High channel, the occupied bandwidth was 94.712 kHz with a transmit frequency error of -614 Hz. All measurements show compliance with the 200 kHz limit.

Necessary Bandwidth

Limit

The spectrum mask for analogue systems in all bands specifies limits for unmodulated carrier reference and emissions relative to the transmitter carrier frequency (fc) and bandwidth (B). For example, at fc ± 0.35B, the level must be below -20 dB, and at fc ± 1 MHz, it must be below -100 dB.

Test Procedure

The test procedure follows EN300422-1 V1.4.2 Clause 8.3.

Test Setup

A diagram shows the EUT connected to a Spectrum Analyzer. This setup is used to measure the necessary bandwidth.

Test Results

Spectrum analyzer plots for the Low (572.190 MHz), Middle (582.690 MHz), and High (595.890 MHz) channels show the measured spectrum relative to the carrier. The peak markers indicate levels of 12.47 dBm, 12.54 dBm, and 11.51 dBm respectively, demonstrating compliance with the necessary bandwidth requirements.

Transmitter Unwanted Emissions

Limit

Spurious emissions, which are emissions outside the equipment's frequency range(s), must not exceed the following power limits:

Test Procedure

1. The transmitter output was connected to the spectrum analyzer through an attenuator. The spectrum analyzer was set to start from 30MHz to 6000MHz with 100 KHz RBW and 300 KHz VBW.
2. Refer to ETSI EN 300 422-1 V1.4.2 (2011-08) clause 6.1 for test conditions.
3. Refer to ETSI EN 300 422-1 V1.4.2 (2011-08) clause 8.4.2 for the measurement method.

Test Setup

Two diagrams illustrate the test setups: one for radiated emissions with a receiving antenna, signal generator, and spectrum analyzer, and another for conducted emissions with a substitute antenna. These setups are used to measure unwanted emissions.

Test Results

Detailed tables for unwanted emissions were provided for both vertical and horizontal polarizations across low, middle, and high channels, covering frequencies from 30MHz to 1000MHz and 1GHz to 6GHz. All measured emissions were found to be within the specified limits, resulting in a "PASS" verdict for all tested frequencies and channels.

Conducted Emission Measurement

Limit

For the operating frequency band, if the emission falls within the restricted band specified on Part 207(a), the following limits apply:

Note: (1) The tighter limit applies at the band edges. (2) The limit of "*" marked band means the limitation decreases linearly with the logarithm of the frequency in the range.

Test Procedure

The receiver parameters were set as follows: Attenuation: 10 dB, Start Frequency: 0.15 MHz, Stop Frequency: 30 MHz, IF Bandwidth: 9 kHz. The EUT was placed 0.8 meters from the horizontal ground plane and 0.4 meters from the vertical ground plane, connected to power mains via a Line Impedance Stabilization Network (LISN). Interconnecting cables were managed to prevent excessive length or bundling. The LISN was positioned at least 80 cm from the EUT chassis.

Test Setup

A diagram illustrates the conducted emission test setup: The EUT is placed on a table, connected to a LISN, which is then connected to a Test Receiver. A vertical reference ground plane and a horizontal reference ground plane are also shown. Support units were connected to a second LISN, and both LISNs were 80 cm from the EUT and other metal planes.

Test Results

Detailed tables for conducted emissions were provided for both Phase L and Phase N, covering frequencies from 0.150 MHz to 30.000 MHz. All measured emissions were found to be within the specified Quasi-Peak and Average limits, resulting in a "PASS" verdict for all tested frequencies.

Frequency Stability

Limit

The frequency tolerance of the carrier signal must be maintained within ±0.005% of the operating frequency over a temperature variation of -20°C to +50°C at normal supply voltage. For variations in the primary supply voltage, the tolerance must be maintained from 85% to 115% of the rated supply voltage at 20°C.

Test Procedure

The EUT was connected to an external DC power supply and its RF output was connected to a frequency counter via feed-through attenuators. The EUT was placed inside a temperature chamber, with leads exiting through an opening. Frequency output was recorded after temperature stabilization. For battery-powered equipment, the primary supply voltage was reduced to the battery operating end point, and output frequency was recorded for each battery voltage.

Test Setup

A diagram illustrates the frequency stability test setup: The EUT is placed inside a Climate Chamber, connected to an RF Attenuator, which then connects to a Spectrum Analyzer or Receiver. A Variable DC power supply provides power to the EUT.

Test Results

The frequency stability was tested against both input voltage variations and time elapse (30 minutes) at various temperatures. For a reference frequency of 572.2MHz, 582.7MHz, and 595.9MHz, the frequency error (in Hz and ppm) remained well within the ±0.005% (50 ppm) limit under all tested conditions (DC 4.25V, 5.0V, 5.75V, and temperatures from -20°C to +50°C). All tests resulted in a "PASS" verdict.