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TYPICAL TEST PROCEDURES
3.10 Transmitter Tests
3.10.01 Transmitter Power, Frequency, and Modulation Measurement
This procedure allows the technical service professional the ability to measure the Transmitter
Frequency Accuracy, RF Power, and FM Deviation or Percent of AM modulation. Frequency
Error, FM Deviation, and AM Percent of Modulation can all be measured in both an analog or
digital format. The Power measured can be displayed in Watts or dBm.
1. Connect the transmitter output to the COM3010 RF OUT jack.
Warning - Do not under any circumstances connect a transmitter to the RECEIVE IN jack
of the COM3010, or damage will result!
Warning - Maximum RF power input to the RF OUT jack of the COM3010 is 100 W. Do
not exceed this level or damage will result!
2. Connect a BNC to BNC cable from the –30dBm OUTPUT on the back panel to the
RECEIVE IN jack on the front panel.
This will take the attenuated output of the power meter circuit and return it to the
receiver for further analysis
3. Select IF.
1 (IF counter 0.1 second gate) by pressing the button.
4. Enter a receive frequency into the COM3010 that matches the transmitter’s transmit
frequency.
Example: 464.15 MHz.
The frequency entered into the COM3010 will be the center frequency of the bargraph meter.
The transmitter frequency is shown on the bargraph in relation to the center frequency.
5. Select the Frequency Error Bargraph Meter or Digital Frequency Error Meter by pressing
Power Measurement
6. Key the radio. The COM3010 will automatically switch to Power Meter mode and
display the transmitted power in the GENERATE screen. To toggle between Watts and
dBm press the key.
Property of Ramsey Electronics, Inc.
Do not reproduce or distribute.
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