General Instrument C6M-II, Руководство по установке

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C6M-II Installation Manual
Section 2
Overview
The C6M-II is a frequency agile modulator offering an output frequency range from 50 MHz to
1 GHz. All standard, HRC, IRC, and EIA frequencies are available either by keying in the
frequency or using the convenient channel maps.
The C6M-II provides local control by using a front panel user interface. This interface is a
menu system that provides easy access to operating parameters that are microprocessor
controlled for precision, accuracy, stability, and reliability.
Upon frequency or channel selection, the microprocessor automatically engages internal
bandpass filters, ensuring that a combined carrier-to-noise (c/n) ratio of greater than 60 dB is
always maintained with no external filtering required. The c/n performance is guaranteed in
multi-channel combined systems up to 149 channels with a typical performance of 63 dB c/n,
normalized to 4 MHz.
The precision frequency stability of the C6M-II meets the band frequency accuracy
requirements for the FCC. The FCC mandated frequency offsets of +12.5 kHz and +25 kHz are
generated automatically. The C6M-II also exceeds all FCC RF and baseband signal
performance requirements.
Options
The options available for the C6M-II are:
n
Modulator Option Board, model C6M-II-MOB Kit
n
DC Power Option Board, model C6-DC
n
Remote Control Option Board, model C6-RC-II Kit
n
Stereo Encoder Option Board, model C6M-II-SE Kit
The C6M-II must have a minimum firmware revision to install the options. The following table
provides the required revision level.
Table 2-1
Required revision levels
Option C6M-II Firmware Revision
C6M-II-MOB 2.0 or higher
C6-RC-II 1.0 or higher
C6M-II-SE 2.0 or higher
The firmware revision can be found using the Option menu. If the revision in not correct,
please contact General Instrument Technical Response Center for assistance.