Tait TM9100 Installation Manual page 22

Shielding
22
Table 2.2 Auxiliary connector (radio) - pins and signals
Pinout Pin Signal name
12 AUX_GPI1
B
5 AUX_GPI2
J
4 AUX_GPI3
C
1)
10 AUX_GPIO4
D
1!
2 AUX_GPIO5
E
1@
9 AUX_GPIO6
F
1#
1 AUX_GPIO7
G
1$
11 AUX_TXD
H
1%
I
3 AUX_RXD
rear view
7 AUD_TAP_IN
13 AUD_TAP_OUT Programmable tap point out
14 AUX_MIC_AUD Auxiliary microphone input.
6 RSSI
8 +13V8_SW
15 AGND
If the auxiliary cable is longer than 4 feet (1m) it is recommended to shield
the cable and connector backshell.
shielding arrangement. The earth braid wire (bare copper) and aluminium
foil should only be earthed at the radio end of the cable.
Figure 2.4 Auxiliary cable and connector shielding
metal D-range shroud in
contact with backshell
analog ground pin
Description
General purpose digital
input. Programmable
function.
Programmable function and
direction.
Pads available to fit a higher
power driver transistor on
GPIO4 line.
Asynchronous serial port -
Transmit data
Asynchronous serial port -
Receive data
Programmable tap point into
the Rx or Tx audio chain.
DC-coupled.
of the Rx or Tx audio chain.
DC-coupled.
Electret microphone biasing
provided. Dynamic
microphones are not
supported.
Analog RSSI output.
Switched 13.8V supply.
Supply is switched off when
radio body is switched off.
Analog ground
Figure 2.4 shows the recommended
metal backshell
signal earth wire
cable insulation
aluminum foil
metal cable clamp
earth braid wire
TM9100 (40W/50W) Installation Guide
© Tait Electronics Ltd October 2004
Signal type
Digital,
3V3 CMOS.
Digital, 3V3
CMOS input;
open collector
output with
pullup
Digital,
3V3 CMOS
Digital,
3V3 CMOS
Analog
Analog
Analog
Analog
Power
Ground