Park Air Systems T6T, User Documentation

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T6T VHF 100 W Transmitter Page 23 Operation
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Fast PTT Output
(antenna
change-over) 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. Maximum
input level ±60 V with respect
to PTT reference. Input will
draw no more than 6 mA, and
requires at least 1 mA to
operate.
When the input PTT signal and
the PTT reference differ by
more than 10 V the radio keys.
When the input PTT signal and
the PTT reference are within
1 V, the radio dekeys.
Other conditions are
indeterminable.
PTT Ref can be set to +14 V,
0 V or -14 V. PTT. Maximum
input level ±60 V with respect
to PTT reference. Input will
draw no more than 6 mA, and
requires at least 1 mA to
operate.
When the input PTT signal and
the PTT reference differ by
more than 10 V the radio
dekeys.
When the input PTT signal and
the PTT reference are within
1 V, the radio keys.
Other conditions are
indeterminable.
Table 6 AM-Voice and AM-MSK Polarity Settings (Continued)
Signal Connector Polarity set to STD Polarity set to INV