Multiplexer Module (TX2A/TX4A)
18 November 1996
MUX-12
Table 3: J3 Pin Functions
Pin#
Signal
Direction
Description
1
A_OUT4
IN/OUT
Switched antenna signal (switched to ground GNDTX,
when active). Connected to TX/RX antennas.
2
ANT
IN/OUT
Antenna resonator signal. Connected to TX/RX antennas.
3
A_OUT3
IN/OUT
Switched antenna signal (switched to ground GNDTX,
when active). Connected to TX/RX antennas.
4
ANT
IN/OUT
Antenna resonator signal. Connected to TX/RX antennas.
5
A_OUT2
IN/OUT
Switched antenna signal (switched to ground GNDTX,
when active). Connected to TX/RX antennas.
6
ANT
IN/OUT
Antenna resonator signal. Connected to TX/RX antennas.
7
A_OUT1
IN/OUT
Switched antenna signal (switched to ground GNDTX,
when active). Connected to TX/RX antennas.
8
ANT
IN/OUT
Antenna resonator signal. Connected to TX/RX antennas.
Table 4: J6 Pin Functions
Pin#
Signal
Direction
Description
1
GND
IN/OUT
Multiplexer Ground
Table 5: TX/RX Channel Selection
Signal
CSA
Signal
CSB
Active TX/RX
antenna
at Connector
LOW
LOW
Channel 1
J3, pins 7 and 8
HIGH
LOW
Channel 2
J3, pins 5 and 6
LOW
HIGH
Channel 3
J3, pins 3 and 4
HIGH
HIGH
Channel 4
J3, pins 1 and 2