User's Guide

T6T VHF 50 W Transmitter Page 22 Operation
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Fast PTT Output
(antenna
changeover)
MARC Audio, pin 3 Open collector NPN transistor
grounding output, 200 mA max,
n/o).
Open collector NPN transistor
grounding output, 200 mA max,
n/c.
PTT Ref
.
-
PTT Ref can be set to +14 V,
0 V or -14 V. PTT state is:
+14 V Ref. key ≤+4 V
≥+24 V
unkey +13 to
+15 V
0 V Ref. key ≤-10 V
≥+10 V
unkey -1 V to +1 V
-14 V Ref. key ≤-24 V
≥-4 V
unkey -13 to -15 V
Maximum input level ±60 V
with respect to reference. Input
will draw no more than 6 mA,
and requires at least 1 mA to
operate.
PTT Ref can be set to +14 V,
0 V or -14 V. PTT state is:
+14 V Ref. unkey ≤+4 V
≥+24 V
key +13
to +15 V
0 V Ref. unkey ≤-10 V
≥+10 V
key -1 V to +1 V
-14 V Ref. unkey ≤-24 V
≥-4 V
key -13 to -15 V
Maximum input level ±60 V
with respect to reference. Input
will draw no more than 6 mA,
and requires at least 1 mA to
operate.
Table 6 AM-Voice and AM-MSK Polarity Settings (Continued)
Signal Connector Polarity set to STD Polarity set to INV