TM8100/TM8200 Accessories Manual
TMAA04-04 Crossband Linking Cable
109
© Tait Electronics Limited
August 2005
12.3
Operational Testing
1.
On the receiving radio, inject an on-channel RF signal at a level of
-70 dBm, modulated to ±3 kHz deviation (wide bandwidth channel)
or ±1.5kHz (narrow bandwidth channel), at 1kHz AF.
2.
On the transmitting radio, the resulting deviation should be:
■
±3 kHz (with a tolerance of ± 200Hz) on a 25 kHz wide
bandwidth channel.
■
±1.5kHz (with a tolerance of ±200 Hz) on a 12.5kHz narrow
bandwidth channel.
12.4
Interface Specification
The following table and diagram summarizes the signals used for the crossband
linking cable on the radios’ auxiliary connectors and shows the interface
between the cable and the radios.
Figure 12.1
TMAA04-04 crossband linking cable
auxiliary connector
radio 1
auxiliary connector
radio 2
crossband linking board
Table 12.7
Auxiliary connectors—pins and signals
Pin Signal
name
Description
2
AUX_GPIO5
busy (output)
7
AUD_TAP_IN
audio tap input
12
AUX_GPI1
PTT (input)
13
AUD_TAP_OUT
audio tap output
15
AGND
analogue ground
J
B
C
D
E
F
G
H
I
1)
1!
1@
1#
1$
1%
rear view
