17.4 CONTROLS AND INDICATORS
Figure 17-2 shows the location of all controls and indicators on the RFL 93B FT/FR single width fiber optic
transceiver module. These controls and indicators are described below. Those described as front panel indica-
tors are visible to the user with the RFL 93B FT/FR installed in the RFL 9300 chassis; all others are only acces-
sible when the RFL 93B FT/FR is removed from the chassis or is on a card extender.
Front Panel LED Indicators
DS1 (Red LED) TX ALARM when illuminated; Indicates that the Emitter on the FT/FR is dam-
aged or not transmitting data.
DS2 (Green LED) TX ON Indicates normal Emitter operation on the FT/FR I/O module.
Test Turrets
TP1 Monitoring point for TX_CLK
TP2 Monitoring point for RCVD_DAT
TP3 Monitoring point for RCVD_CLK
TP4 Monitoring point for 3.584 MHz clock
TP5 Monitoring point for VCO_2
TP6 Monitoring point for REC_LOCK
TP7 Monitoring point for PH_DET
TP8 Ground
Jumpers
J1 Phase detector select (used during factory alignment)
J2 56K/64K clock select
Controls
R9 Potentiometer (used to adjust phase detector during factory alignment)
RFL 9300 RFL Electronics Inc.
May 1, 1998 17 - 4 (973) 334-3100
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