TA2922 TM8/TM9 Universal Line Interface Board Installation Instructions 3
© Tait Electronics Limited April 2010
The D-range signals can also be field-configured by applying solder links to the 26x9
matrix on the bottom of the board. The matrix has a printed table with columns
labelled with the associated SK1 D-Range pin number, and rows labelled with the signal
letter, as shown below. Fit a solder link at the intersection of the required pin number
and signal.
For example, to configure SK1 pin 5 as ground, fit a solder link to the bottom-side
matrix at the intersection of row C and column 5.
Important: Before fitting solder links to the bottom side of the matrix, remove existing
components from the top side of the matrix or check carefully that existing links do not
conflict with newly populated solder links on the bottom side. Failure to do so may result in
unexpected operation or permanent damage to the TA2922 interface.
Signal Signal Name Description Direction
(relative to
TA2922)
Level
A LINE OUT 1 Balanced line output (6/8-way)
/balanced line in/out (2-way)
Output -30 to +10dBm into
600 ohms
B /GATE OUT 1 RX gate output via relay contacts,
configurable
Output 0-50VDC @1A
CGROUND Analogue/DC ground Bidirectional 0V
D /PTT IN 1 PTT input to opto-coupler Input 10-50VDC
E LINE IN 1 Balanced line input (6/8-way) Input -30 to +5dBm
F LINE IN 2 Balanced line input (6/8-way) Input -30 to +5dBm
G /PTT IN2 PTT input to opto-coupler Input 10-50VDC
H /GATE OUT 2 RX gate output via relay contacts,
configurable
Output 0-50VDC @1A
I LINE OUT 2 Balanced line output (6/8-way)
/balanced line in/out (2-way)
Output -30 to +10dBm into
600 ohms
J +13V8_SW Switched DC supply output Output 10.8-16VDC
@150mA
K AUX MIC AUD Mic audio directly to the radio aux
microphone input
Input 2.3VDC 15mV RMS
L RSSI Analogue RSSI output from the radio Output 0-3VDC
M LINE IN UNBAL Unbalanced transmitter audio input Input 8mV to 1V RMS
N LINE OUT UNBAL Unbalanced receiver audio output Output 25mV to 1V RMS
O GATE OUT DIRECT Open collector RX gate output Output 45VDC max
P PTT DIRECT Un-isolated PTT input Input 5VDC max
Q EXT GPIO3 Bidirectional I/O to/from radio Bidirectional 0-3.3VDC
R EXT GPIO4 Bidirectional I/O to/from radio and line
interface disable
Bidirectional 0-3.3VDC
S EXT GPIO5 Bidirectional I/O to/from radio Bidirectional 0-3.3VDC
T EXT GPIO6 Bidirectional I/O to/from radio Bidirectional 0-3.3VDC
U EXT GPIO7 Bidirectional I/O to/from radio Bidirectional 0-3.3VDC
V RADIO DATA IN Data to microcontroller (RS-232 level) Input -10 to +10V
W RADIO DATA OUT Data from microcontroller (RS-232
level)
Output -10 to +10V
X RTS IN RTS input to microcontroller (RS-232
level) [not yet implemented]
Input -10 to +10V
Y CTS OUT CTS output from microcontroller (RS-
232 level) [not yet implemented]
Output -10 to +10V
Z AUX I/O AC coupled line to J1, can connect to
radio speaker output via internal wire
Bidirectional N/A
