RFL 9785
RFL Electronics Inc.
April 25, 2005
15-6
(973) 334-3100
15.4
CONTROLS AND INDICATORS
Figure 15-4 shows the locations of all controls and indicators on the voice module. These controls and
indicators are described in Table 15-1. LEDs DS1 and DS2 are visible with the module installed in the
chassis. All other controls are only accessible when the module is removed from the chassis or is on a
card extender.
Table 15-1. Controls and indicators, RFL9785 Voice Module
Component
Designator
Name/
Description
Function
DS1
LED, Voice enable
Lights when the local station is transmitting voice.
DS2
LED, Receiver call
Lights when a call is received from the station at the other end of the
protected line.
J1
Jumper, normal/test
Controls the AGC circuit as follows:
NORM: AGC circuit enabled
TEST: AGC circuit disabled. Used during module alignment only.
For proper module operation, J1 must be in the NORM position.
J2
Jumper, AGC in/out
Controls the AGC function as follows:
IN: AGC function enabled
OUT: AGC function disabled.
J3
Jumper, side tone in/out
Controls the sidetone (voice) fed back from the handset microphone
to the handset headphone as follows:
IN: Sidetone enabled
OUT: Sidetone disabled.
J4
Jumper,
alarm
cutoff
internal/external
Controls the location of the Alarm Cutoff contacts as follows:
INT: Contacts located in handset plug.
EXT: Contacts located at 9785 rear panel terminal block.
J5
Jumper, enable /disable
Controls Audible alarm as follows:
ENABLE: Audible alarm enabled
DISABLE: Audible alarm disabled.
R7
Potentiometer
Input level adjust
R63
Potentiometer
Controls the amount of signal sent to the transmitter module. This
controls the % modulation to be applied to the carrier.
R71
Potentiometer
Audio level adjust
R125
Potentiometer
Tone
adjust
SP1
Audible warning device
An audible tone is heard when a call is received from the station at
the other end of the protected line.
TP1
Test point, Common
Ground reference
TP2
Test point, Level
Monitoring point for input signal level
TP3
Test point, AGC IN
Monitoring point for input of AGC circuit
TP4
Test point, AGC OUT
Monitoring point for output of AGC circuit
TP5
Test point, MOD LEV
Monitoring point for output of voice detector
TP6
Test point, AUD OUT
Monitoring point for audio output signal
TP7
Test point, TONE
Monitoring point for call tone
TP8
Test point, VOICE DETECT
Monitoring point for local voice signal