I N S T A L L A T I O N
17.
TRANSMIT AUDIO ADJUSTMENT:
The Transmit Audio is adjusted using the Range Switch Assemblies, and V
ariable Resistors
VR5 & VR6. Each range switch assembly has 2 switches which select ranges for the
T
ransmit Audio adjustment (see Table 1 for the range switch settings), and the V
ariable
Resistors adjust the Transmit Audio level within these ranges.
32.
Radio A (all models):
Using a Service Monitor, adjust Range Switch Assembly S1
and VR5 for proper transmitter deviation and no transmitted audio clipping.
33.
Radio B (3020R only):
Using a Service Monitor, adjust Range Switch Assembly
AS2 and VR6 for proper transmitter deviation and no transmitted audio clipping.
AUXILIARY INPUT & OUTPUT
On the back of the 3010R Series Intercom, there are 2 jacks labeled “Aux In” and “Aux Out”
(Figure 19). These jacks are 3.5 mm stereo (conductor) jacks. If a mono plug is inserted in this
jack, it may damage the auxiliary device. A mono to stereo adapter is required. The auxiliary
input signal will be mixed with the radio and the intercom audio. The auxiliary input signal
CANNOT
be directed to the transmit circuits for radio broadcast. The auxiliary output signal
strength will be exactly 1/2 the strength of the signal in the headsets. The auxiliary output
signal will consist of intercom audio, receive audio from radios A & B, and any audio from
the auxiliary input.
S1
S2
Mic To Output Gain
On
On
+22.8 dB to +2.9 dB
Off
On
+3.7 dB to -16.7 dB
Off
Off
-15.7 dB to -37.1 dB
(Maximum Signal At Mic Jack: 1.1v pk-pk)
TABLE 1
Range Switch Settings
FIGURE 19:
3020R Rear Panel
Auxiliary
Input
Auxiliary
Output
Remote Jacks
(Identical)
POWER
INTERCOM
AUX
RADIO B
RADIO A
REMOTE
IN
OUT
PR
