General Instrument C6M-II, Руководство по установке

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2-6 Overview
C6M-II Installation Manual
The following table describes the features on the rear panel of the C6M-II modulator.
Table 2-3
Description of rear panel connections
Key Feature Description
A Power line connector. Label indicates input power range.
B
REF OUT
and
REF IN
connectors are used to apply comb generator
reference signals for phase-locked operation. Applicable only for
units with the phase lock option. The
REF OUT
connector is a loop
through connection from the
REF IN
connector with an insertion
loss of 1.0 dB maximum. The frequency of
REF IN
must be 6 MHz.
These are F-type coaxial connectors.
C The
EXT SUBCARRIER IN
connector accepts a monophonic or stereo
FM modulated 4.5 MHz audio subcarrier signal with a level of 50
to 200 mV rms. It also accepts composite baseband (video plus
4.5 MHz subcarrier). Available only when the modulator option
board is installed. This is a F-type coaxial connector.
D
RF OUT
connector. This is the RF channel output. The modulated
video and audio carrier signals appear here. The output level is
adjusted through the menu. This is an F-type coaxial connector.
E The
CW OUT
connector provides a + 50 dBmV minimum
unmodulated picture IF carrier for use with the MVP-II video
processor. This is an F-type coaxial connector.
F
REMOTE
connectors. See the remote control option installation
manual for details on the function of these connections.
G
SIF OUT
and
SIF IN
connectors are jumpered during normal
operation. The
SIF OUT
connector has FM modulated sound IF
signal (41.25 MHz) at a nominal level of 10 to 30 dBmV,
depending on the audio level selected on the main menu. The
SIF
IN
connector is capable of passing a monophonic or stereo
modulated sound IF carrier. These are F-type coaxial connectors.
H
PIF OUT
and
PIF IN
connectors are jumpered during normal
operation.
PIF OUT
can be used to interface with an IF scrambler.
The
PIF OUT
connector is a modulated picture IF carrier at a
nominal level of 35 dBmV. Since the
PIF IN
connector precedes a
sound acoustic wave (SAW) filter, a composite IF signal (picture
IF plus sound IF) should not be applied to the
PIF IN
connector.
These are F-type coaxial connectors.
I
SUBCARRIER
,
PRGM IF
,
AUX IF
, and
VIDEO B
selection terminals are
activated by connecting them to one of the ground terminals on
the strip. When equipped with the stereo encoder option and
modulator option board,
AUDIO B
/
SE
input is available. Audio B is
monaural only. The functions of these features are described in
Section 3, Installation.