Typical Radio
AM360r 4-Wire E&M Port
Rev. A
3
6
4
5
8
7
2
1
-48V
Type II & III
3.32K
E
SG
SB
M
T
R
T1
R1
Audio IN
Audio OUT
600 ohm
600 ohm
600 ohm
600 ohm
AM360r RJ-45
Detect
COS
out
Off Hook
B
A = Connection to 4 Wire E&M Type II and III Units
Sig OUT
Sig IN
-12 VDC
2K
Full
Wave
Bridge
+
-
+12 VDC
B = Connection to 4 Wire E&M Unpowered Units
PTT
Detect
A
Battery
8
2
7
1
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4
AM360r User Manual
revised 2008.07.11 for
Hardware Rev. A
Firmware Version 1.00.20
Appendix A - Interface Examples
Ritron Nexus Radio Base
The Ritron NRB is a small, lightweight radio available in VHF and UHF bands that is well-
suited to demonstration use. It interfaces with the AudioMate 360r via a crossover (or
rollover) E&M cable and by setting a hybrid combination of jumpers inside the Ritron.
E&M Crossover Cable
Pin Assignments
Ritron AM360r
Wire color
Description
1
8
Orange
-12 Volts (SB)
2
7
Orange/White
COS (M-lead)
3
3
Green
Rx audio, balanced
4
4
Blue/White
Tx audio, balanced
5
5
Blue
Tx audio, balanced
6
6
Green/White
Rx audio, balanced
7
2
Brown/White
PTT to Ritron (E-lead)
8
1
Brown
Ground (SG)
Ritron Jumper Settings
Remove the 2 side screws and the 2 smaller bottom screws to remove the base of the
Ritron radio.
Locate the E&M daughter board and install jumpers to positions A, C, and E.
Re-install the cover and screws.
¤
¤
¤
a
a
AudioMate 360r
Note: The crossover cable
te: The crossover cable
is NOT the same as a LAN
crossover cable.
AudioMate 360r
Note: The crossover cable
te: The crossover cable
is NOT the same as a LAN
crossover cable.
AudioMate 360r
Note: While the AM360r is
booting it is possible that
it will falsely key the Ritron
radio. Do not connect the
E&M cable until the AM360r
is booted and the OK lamp is
Green.
AudioMate 360r
Note: While the AM360r is
booting it is possible that
it will falsely key the Ritron
radio. Do not connect the
E&M cable until the AM360r
is booted and the OK lamp is
Green.