Apollo SL40 User Manual

Troubleshooting
14 Apollo SL40 Field Maintenance Manual
2. Using the CURSOR control knob or the USER keys set:
AUTO MANUAL MANUAL
TUNE Freq 127.5 MHz See NOTE below
TX PWR 0
RF IN/ ANT RF IN
AF ANAL IN AM Demod
De-EMPHASIS off
Detector PK+-/2
AF GEN Freq. 1 kHz
AF GEN LVL off
NOTE: Where interference may be a problem, use any unused channel for both
the SL40 and the HP 8920 as long as both are on the same frequency.
A frequency close to center of operating range is preferred.
3. Set the SL40 as listed below.
While viewing the frequency display, use the Large and Small knobs on the right
side of the SL40 to select 127.5 MHz.
Toggle this frequency into the Active channel.
Press the PTT button on the test panel.
EXPECTED RESULTS TX Freq. Error 0 ± 15 PPM
4. UN-key the transmitter
TRANSMITTER POWER MEASUREMENT
Transmitter power is measured using the HP8920. This is accomplished by presetting the
SL40 to the same channel as the HP8920 and reading the transmitter power output, with
no MIC audio input.
Figure 4. Transmitter Test Setup

Apollo SL40 Specifications

General

Brand	Apollo
Model	SL40
Category	Transceiver
Language	English