4: Technical Description
4-4
MT1099A-MS
4.2
Connector Pin Assignments
The tables in this section provide the pin assignments for the MT-1099A
external connectors.
Figure 4-2. Transceiver Connector J1 Pinout
Pin
Signal
Description
A
Ground
Chassis ground.
B
Amp PTT
PTT signal to external RF power
amplifier.
C
N/C
No connection.
D
Tune Initiate
Tune initiate signal from transceiver. A
momentary ground from the transceiver
initiates a tune cycle in the antenna tuner.
E
+12 Vdc
12 Vdc power to transceiver.
F
N/C
No connection.
H
RS232TXD/Data
Serial data line from transceiver. Provides
channel number and menu data.
J
Tuner key
Return key signal from antenna tuner.
Keys the transceiver into low-level
carrier tune power.
K
RS232RXD/Clock
Serial clock line from transceiver. Causes
tuner to read channel data.
L
N/C
No connection.
M
Ext Sel
External select line from transceiver to
enable external RF power amplifier.
N
Amp ALC
Automatic level control signal to the
external RF power amplifier.
P
Ex Audio
External received audio from transceiver
to built-in speaker.
R
N/C
No connection.
A
B
C
D
E
F
H
K
L
M
N
P
Q
S
J
R
