Instruction manual

ACU-1000 Operations Manual
Interoperability Now 1-5
to any active control programs) does the Controller screen show the change in cross-connection
configuration.
1.4.1.1 Radio-to-Radio Cross-connection
Figure 1-2 shows two different types of radios patched together. Normally a Type A radio can
communicate with any other Type A radio that’s “in range, or with a repeater” but the signals
from the Type A radios are completely ignored by the Type B radios, and vice-versa. The
ACU-1000’s DSP modules take the Type A radio’s audio and control signals, translate the
control signals into a PTT for the Type B radio, and sends the Type B radio this control signal
along with the audio.
The cross-connections between DSP module “A” and DSP module “B”
DSP
Module
Radio A
Radio B
Radio A
B
DSP
Module
A
R
X
A
u
d
io
&
C
O
R
TX Audio & PTT
RX Audio: What is being spoken into Radio A
COR: This signal is active while the talking is occuring
TX Audio: This same audio from A being sent back out B
PTT: This signal is active when COR is active
Radio B
Figure 1-2 Pictorial Overview – Cross-Connections Using the ACU-1000