Park Air Systems T6TR, Пользовательская документация

Страница: 87 / 136

T6TR VHF 50 W Transceiver Page 21 Installation
Back to Transceiver
Main Page
MARC Audio Connector
The MARC Audio connector is an 8-way RJ48 socket. It can be used as an alternative to the MARC
connector for audio, PTT and squelch connections. The connector pin-out is shown below and detailed
in Table 8.
Table 8 MARC Audio Connector
Pin Number Signal Characteristic
1
2
Audio line out (-)
Audio line out (+)
Balanced 600 ohm -30 to +10 dBm. Phantom squelch
(see
Fig 14 ) - solid-state relay, +60 to -60 V, ac or dc,
100 mA max, configurable n/o or n/c. Contact closure
time is less than 20 ms.
3 Fast antenna
change-over/PTT Open collector NPN transistor grounding output,
200 mA max, configurable n/o or n/c.
4
5
Audio line in (+)
Audio line in (-)
Balanced 600 ohm input, -20 to +20 dBm.
Phantom PTT (see
Fig 13 ) - active when input differs
from reference by more than ±10 V. Inactive when
input differs from reference by less than ±1 V.
Maximum input level ±60 V with respect to reference.
Input will draw no more than 6 mA, requires at least
1 mA to operate. Configurable active high or low.
Common reference to all inputs programmable to
+14, 0 or -14 V (±1 V).
6 Squelch
(output) Solid state relay, +60 to -60 V, ac or dc, 100 mA max,
configurable n/o or n/c. Contact closure time is less
than 20 ms.
7 Ground 0 V.
8 PTT (input) Active when input differs from reference by more than
±10 V. Inactive when input differs from reference by
less than ±1 V. Maximum input level ±60 V with
respect to reference. Input will draw no more than
6 mA, requires at least 1 mA to operate. Configurable
active high or low. Common reference to all inputs
programmable to +14, 0 or -14 V (±1 V).
Pin 1
RJ48 Plug
Numbering is shown looking from the top of the connector.
The top is being viewed when the lever is on the bottom.