GAI-Tronics 370-400 UHF and VHF Page/Party Radio Couplers - Manual (Page 10)

Pub. 42004-432D
Model 370-400 UHF and 370-420 VHF Page/Party
®
Radio Couplers Page: 10 of 13
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VOX Threshold Adjustment Switch, SW1 – The threshold of the VOX can be adjusted to one of 16
levels to account for system level scenarios, low signal level versus noise. Refer to Table 6 for threshold
levels.
Table 6. Nominal VOX Threshold Settings
Selector
Switch
Position
VOX
Threshold
(mV)
0 380
1 350
2 330
3 300
4 275
5 250
6 225
7 200
8 190
9 160
A 140
B 110
C 90
D 60
E 40
F 20
Level Adjustments
Radio to Page/Party
®
Volume Adjustment - The volume from the radio to the Page/Party
® lines can be
adjusted by R21.
Page/Party ® to Radio Volume Adjustment – The volume from the Page/Party
® lines to the radio can be
adjusted by R42.
Attaching the Front Panel
After all adjustments have been completed, place the front cover on the rear enclosure, being careful not
to pinch any cables. Secure the front cover using the four screws and washers provided. Torque the
screws to 10–12 in-lbs (1.13–1.36 n-m).