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WIRE LINE REMOTE BASE MODULAnON
1. Set-up this station in two steps: Transmitter modulation and phone line levels.
2. Connect the Analyzer to the transmitter under test as shown in figure 4-16.
3. Set DISPLAY to DVM, FUNCTION switch to Monitor, and MODULATION switch to off. Set MONITOR BW
switch to narrow and squelch control to threshold.
4. Set the attenuator to -30 dB. For low-power transmitters, it may be necessary to reduce the attenuator setting to un-
squelch the monitor. Too high an attenuator setting or too tight a squelch setting inhibits the modulation deviation
display.
5. Enter the proper transmitter frequency. Move the display cursor down to DVM and enter 1 for AC mode. Adjust the
1 KHz Level control for 1 VAC indicated on the display, to put 1 volt of 1 KHz test tone into the transmitter modula-
tion limiter.
6. Set DISPLAY to Oen/Mon Mtr. Key the transmitter and adjust the transmitter. IDC control for 5 KHz DEV in-
dicated on the display. Un-key the transmitter.
7. Follow the base station phone level setting outlined in the next procedure.
4-28
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