RFL 9785 - Controls and Indicators; Table 12-1. Controls and Indicators, RFL 9785 Receiver Detector Module

Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
12.4 CONTROLS AND INDICATORS
Figure 12-3 shows the location of all controls and indicators on the RFL 9785 Receiver Detector
module. These controls and indicators are described in Table 12-1. Only R26 and R34 are accessible
with the RFL 9785 Receiver Detector module installed in the chassis. All others are accessible when
the module is removed from the chassis or is on a card extender.
Table 12-1. Controls and indicators, RFL 9785 Receiver Detector Module
Component Name/Description Function
Designator
DPM1 Digital Panel Meter Displays signal level in dB.
J1 Connector Input to voice bandpass filter (when voice filter is plugged in)
J2 Connector Output of voice bandpass filter (when voice filter is plugged in)
Position “A” selects ±1 Vdc output.
J3 Jumper
Posi
tion “B” selects 0 to -100μA out
put
.
Position “C” selects 0 to -5 Vdc output.
R26 Potentiometer Sets the signal level threshold
R34 Potentiometer Sets the signal level meter to zero dB (meter null)
R51 Potentiometer Calibrates the meter signal
R67 Potentiometer Narrow Band filter adjust
R74 Potentiometer Narrow Band filter adjust
R79 Potentiometer Narrow Band filter adjust
R84 Potentiometer Ripple adjust
R90 Potentiometer Sets the signal level at the output of the narrow-band filter (output gain)
TP1 Test Point Signal ground
TP2 Test Point Input to voice filter
TP3 Test Point Output of voice filter
TP4 Test Point Output of logarithmic amplifier
TP5 Test Point Output of signal level detector and filter
TP6 Test Point Signal applied to Digital Panel Meter
TP7 Test Point Input to bandpass filter
TP8 Test Point Output of bandpass filter
TP10 Test Point Level out
TP11 Test Point Signal ground
TP12 Test Point Used to monitor the threshold for carrier detect (for factory use only)
TP13 Test Point +5VDC reference
TP14 Test Point -5VDC
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RFL 9785 RFL Electronics Inc.
July 7, 2006 12-5 (973) 334-3100