RELEASED: 10/2/2006
Page 46
COMMUNICATI0NS
HSD SERIES OPERATION AND MAINTENANCE
This is an unpublished work protected by the United States copyright laws and is proprietary to EMCEE Communications.
Disclosure, copying, reproduction, merger, translation, modification, enhancement or use by anyone other than authorized
employees or licensees of EMCEE Communications without the prior written consent of EMCEE Communications is strictly
prohibited.
Copyright © 2006 EMCEE Communications. All rights reserved.
This copyright notice should not be construed as evidence of publication.
5.3 Troubleshooting:
If the visual and/or aural output signals from the transmitter appear distorted, noisy
or nonexistent, consider the following procedure as a troubleshooting aid. This
procedure assumes the transmitter wiring as well as the cabling and connectors
are trouble free. It also assumes the modulator is receiving clean baseband video
and audio signals (or error free data input) while providing the required visual and
aural IF carrier levels (or digital input level). The general problem area will be
indicated by simply checking the diagnostic indications from the front panel display
and the fault LEDs on the control board (see manual Section 3.6).
5.4 Front Panel Indicators:
1. Under normal operation (transmitter on) the front panel LED and meter
indicators will show the following indications.
o
Operate-
ON
o
LO Lock- ON
o
IF Input- ON
o
Output Lock- ON
o
External 10 MHz- ON (if external reference is used)
o
VSWR Overload- OFF
o
Amplifier Fault- OFF
o
Temperature Fault- OFF
The transmitter meter will have the following display:
o
+12 Volt Supply- IN RANGE
o
-12 Volt Supply- IN RANGE
o
Forward Power Meter-
≈
100%
o
Reflected Power Meter- 0-10%
2.
Under Standby conditions (transmitter off), sw12 volt power is off.
Unless the transmitter is in the standby mode due to a VSWR overload, the
VSWR OVLD indicator is OFF.
3.
Any indicator, which is not in range of the normal operational display value
range, signifies a transmitter malfunction. If the operator has the appropriate
technical experience to locate the malfunction, repairs to the transmitter may
be made by replacing or repairing the defective transmitter module.
