Am Transmitter Testing; Scope Of Test; Uut Parameters/Characteristics; Equipment Needed - Viavi CX100 ComXpert Operation Manual

Chapter 6 Performing Tests and Measurements

AM Transmitter Testing

6.3

AM Transmitter Testing

6.3.1 Scope of Test

This section explains how to configure the CX100 to evaluate the transmit performance of
an AM device. The test setup in this section can be used to evaluate the following UUT
parameters:
• AM Transmitter Power
•
AM Transmitter Frequency
• Modulation Level
• Transmitter Distortion

6.3.2 UUT Parameters/Characteristics

The example in this section assumes the following UUT characteristics and settings; adjust
settings according to the operational capabilities of the UUT.
Parameter
Transmit Frequency
Transmit Power
Transmit Modulation
Maximum Modulation Index
Maximum Modulation Frequency
Microphone/Mod Input
Modulation Input Level for Test
Modulation

6.3.3 Equipment Needed

The following equipment is required to perform the test procedures defined in this section:
• CX100 ComXpert
•
Audio cable and MIC/Audio Adapter combination capable of interfacing an audio
signal from the CX100 audio output to the transmitter modulation input (typically the
microphone input on the transmitter).
•
Two RF Coaxial Cables
• 10 dB RF Attenuator
Rev 002
6 - 10
Table 6-4 AM Transmitter Test - UUT Settings
CX100 ComXpert Operation Manual
Setting
116.5 MHz
50 Watts
AM
100%
3 kHz
DC Coupled, 600 Ohm
30 mVrms
22144015
August 2023