T6T VHF 100 W Transmitter
Page 22
Operation
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Table 6 AM-Voice and AM-MSK Polarity Settings
Signal
Connector
Polarity set to STD
Polarity set to INV
Ready Out
Facilities, pin 13
An open collector grounded
output when the radio is ready
to transmit and no BIT faults
are detected.
An open collector high
impedance output when the
radio is ready to transmit and
no BIT faults are detected.
E-BIT In
Facilities, pin 2
TTL input. 0 V indicates an
external fault.
TTL input. 5 V indicates an
external fault.
Inhibit In
Facilities, pin 10
TTL input. 0 V inhibits
transmitter operation.
TTL input. 5 V inhibits
transmitter operation.
BIT Start In
Facilities, pin 11
TTL input. 0 V initiates an
interruptive BIT test.
TTL input. 5 V initiates an
interruptive BIT test.
PTT In
MARC, pin 4
MARC Audio, pin 6
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.
Active when input differs from
reference by less than 1 V.
Inactive when input differs from
reference by more than 10 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.
Phantom PTT In
(Phan PTT In)
MARC or
MARC Audio, pin 2
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.
Active when input differs from
reference by less than 1 V.
Inactive when input differs from
reference by more than 10 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.
PTT Out
Facilities, pin 3
Grounding solid state relay.
+60 to -60 V, ac or dc, 100 mA
max, n/o. Activated 20 ms
(±1 ms) before the start of the
power ramp up to allow for the
antenna relay to pull-in time.
Grounding solid state relay.
+60 to -60 V, ac or dc, 100 mA
max, n/c. Activated 20 ms
(±1 ms) before the start of the
power ramp up to allow for the
antenna relay to pull-in time
External VSWR
Input
(Ext VSWR In)
Facilities, pin 4
TTL input. 0 V active.
TTL input. 5 V active.
Antenna
Changeover
(Ant c/o out)
Facilities, pin 5
(Common pin 6)
Solid state relay. +60 to -60V,
ac or dc, 100 mA max, n/o.
Activated 35 ms (±1 ms) before
the start of the power ramp up
to allow for the antenna relay
pull-in time.
Solid state relay. +60 to -60V,
ac or dc, 100 mA max, n/c.
Activated 35 ms (±1 ms) before
the start of the power ramp up
to allow for the antenna relay
pull-in time.
Continued >>
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