ZETRON 025-9581M, Installation And Maintenance Manual

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Model 26 Backup in a Voice over Radio System
5. Leave the laptop attached to the Model 6203 and leave it in the programming mode
for now.
Model 26 FFSK Receive Level
♦
Setting the Model 26 transmit level:
1. Attach an oscilloscope to the FFSK test point (TP6) on the back of the Model 26.
The signal to be measured will be approximately 1.0 Vp-p.
2. On the back panel of the Model 26, turn the 4W RCV pot (R69) fully clockwise
and the 2W RCV pot (R81) fully counterclockwise.
3. Turn the FSK POST RCV pot (R78) fully counterclockwise and set the VOX pot
(R31) to its mid-position.
4. At one of the Model 6203 sites that has had its FFSK transmit level set, hit the
SPACE bar on the computer keyboard three times to open the Model 6203 Main
menu. Then enter an “ 8 ” to start the {8} FFSK LEVEL SET test tone sequence.
5. If the voltage measured at the FFSK test point (TP6) while receiving the FFSK test
tone is less than 1Vp-p (0.35 Vrms), turn the FSK POST RCV pot (R78) on the
Model 26 clockwise until it is at least 1.0 Vp-p.
6. If the voltage measured at the FFSK test point (TP6) while receiving the FFSK test
signal is greater than 1.0 Vp-p (0.35 Vrms), turn the 4W RCV pot (R69) on the
Model 26 counterclockwise until it is 1.0 Vp-p or less.
Finishing Up
The following list covers the cleaning up after the levels have been set at the Model 26 and
all of the Model 6203 station units.
♦
Finishing up the Model 26 backup system setup:
1. At both the Model 26 location and the Model 6203 site, return the units to normal
operating mode and remove the serial cables.
• Keep entering “e” until you reach the Main menu and then enter “e” one more
time to exit the programming mode.
• Model 6 — move SW1-8 to the off position
• Model 26 — move SW7 to the off position (CAD/Data Logging)
2. Remove all test lead connections and close up the Model 26 and Model 6203 units.
3. After the Model 26 has had a chance to poll all of the Model 6203 units in the
system, try making an alert to each of the units to check whether the voice audio
levels are adequate. If they need to be adjusted use R107 (RCV-4W) on the Model
6203 mother board.
4. In the IP FSA Configuration Utility, under Global Server Settings , confirm that
the Station Retry Timeout for the IP FSA system is still set to the default setting
of 10.0 seconds.