Broadcast Electronics FX-50, Инструкция по эксплуатации

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©2011 Broadcast Electronics
3 OPERATION
This section identifies all controls and indicators associated with the FX-50/E FM Exciters and provides standard
operating procedures.
3.1 CONTROLS AND INDICATORS.
Refer to Figure 3-1 for the location of all controls and indicators associated with normal operation of the FX-
50/E Exciters. The function of each control or indicator is described in Table 3-1.
3.2 OPERATION.
NOTE
NOTE
THE FOLLOWING PROCEDURE ASSUMES THAT THE
EXCITER IS COMPLETELY INSTALLED AND IS FREE
OF ANY DISCREPANCIES.
3.2.1 TURN ON.
Primary power will be applied to the FX-50/E when the transmitter filament supply is energized. Operate the
transmitter filament power to ON. The following events will occur:
A. The flushing fan will operate.
B. The +20V, -20V, and +5V operating voltage status indicators will immediately illuminate.
C. After a delay of approximately 5 seconds, the LOCK indicator will illuminate to indicate operating
frequency stabilization.
D. The multimeter will be operated to the forward power function and indicate a previously adjusted RF
output level.
Observe the modulation indicator to ensure programming is applied to the exciter.
Operate the multimeter forward switch to illuminate the FWD indicator and record the multimeter output
power indication .
Operate the multimeter reflected switch to illuminate the RFL indicator and record the multimeter reflected
power indication .
The exciter forward and reflected power indications may be converted to a VSWR ratio using Table 3-2. To use
the table, divide the multimeter reflected power indication by the multimeter forward power indication. Locate
the quotient in the POWER RATIO column. The VSWR is listed across from the POWER RATIO entry.
3.2.2 TURN OFF.
If the exciter primary circuit is connected to the transmitter filament supply, the exciter will deenergize when the
transmitter is turned off. The FX-50/E exciter does not require constant primary power.