RELEASED: 10/2/2006
Page 22
COMMUNICATI0NS
HSD SERIES OPERATION AND MAINTENANCE
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3 CIRCUIT DESCRIPTIONS
3.1 UP-CONVERTER DRAWER:
Interconnection Diagram 50520000 D1
Composite Analog Mode:
Visual IF IN (J2)
-0 to -20 dBm peak visual
Aural IF IN (J2)
-13 to -33 dBm average aural
VISUAL RF OUT (J4)
≈
+40dBm peak visual
AURAL RF OUT (J4)
≈
+27dBm average aural
Digital Mode:
Digital IF IN (J2)
-5 to -25 dBm (average power)
DIGITAL RF OUT (J4)
≈
+34dBm (average power)
The Up-Converter drawer contains a series of modules which as a group, up-convert
the modulator's combined visual and aural IF carriers or digital IF carrier to the
selected S-Band output channel providing approximately 34dBm or 2.5 watts
(40dBm of peak visual power and 27dBm of average aural) of power at the channel
output jack (J4) located on the rear panel of the up-converter drawer. IF signal
processing and frequency dual conversion is accomplished by the chain of an IF
Module (PC1), a 1
st
Converter Module (A1), and a Channel Output Converter (A1)
(with the associated circuitry of a Down-Converter, Local Oscillator, and Reference
Oscillator). Signal processing and manual adjustments are provided for in the IF
Module. Front panel adjustments are provided for output power and AGC level.
The up-converter drawer also contains the optional remote control board and the
+12/-12 volt power supply module. For additional information on the remote
control/status board see Section 3.10.
