Define The Control Channel Settings; Prepare The Decoder For Transmitter Measurements - HP 8920A User Manual
Rf communications test set
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Also See for 8920A:
- Application handbook (322 pages) ,
- Application handbook (319 pages) ,
- Programmer's manual (607 pages)
Table of Contents
Define the Control Channel Settings
1. Turn AF Generator 1 off by positioning the cursor in front of the 3.00 value of the
AFGen1 To field and pressing the ON/OFF key.
2. Select ENCODER from the To Screen menu.
3. Select the EDACS Mode to display the EDACS Encoder.
4. Select the Data Rate using the Standard field. (4800 or 9600 bps)
5. Enter the Control Channel settings.
•
The Number is your system's control channel number.
•
The RX Frequency is the control channel's receive frequency for your mobile.
•
The TX Frequency is the control channel's transmit frequency for your mobile.
6. Enter the Working Channel settings.
•
The Number is the working channel number you want the mobile to be sent to.
•
The RX Frequency is the mobile's receive frequency for the selected working
channel.
•
The TX Frequency is the mobile's transmit frequency for the selected working
channel.
7. Enter the Logical ID number.
8. Enter the Group ID number.
9. Enter the Site ID number.
Prepare the Decoder for Transmitter Measurements
1. Turn the SQUELCH control on the Test Set fully clockwise.
2. Select DECODER from the To Screen menu to access the EDACS Decoder.
3. Set the AF Anl In field to FM Demod to demodulate the signal from your transmit-
ter.
4. Set the Input Level field to about one third of the expected deviation. (For example,
if your transmitter's deviation is 3 kHz, set the Input Level to about 1 kHz.)
5. Select the Arm Meas field to prepare the decoder. The Status: field should indicate
Armed.
6. Select the Send field (under RX Test). This outputs the control channel information
specified in the EDACS Encoder.
The mobile should indicate that it is receiving the control channel data.
Chapter 8, Signaling Decoder Screen
Using the EDACS Decoder
299
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