115 VAC, 60Hz
30 WATTS
IN
OUT
FUSE
1 / 2 A, 250 V
SLO - BLO
CAUTION:
ATTENTION:
- RISK
OF FIRE - REPLACE
FUSE AS MARKED
AFTER DISCONNECTING
UNIT FROM AC LINE.
- RISQUE D'INCENDIE -
REMPLACEZ FUSIBLE DU
TYPE INDIQUE APRES
DEBRANCHER DU SECTEUR.
IF
LOOP
RF
INPUT
COMPOSITE IF
RF
OUTPUT
SERIAL #
®
MADE IN THE U.S.A. BY
115 VAC, 60Hz
30 WATTS
IN
OUT
FUSE
1 / 2 A, 250 V
SLO - BLO
CAUTION:
ATTENTION:
- RISK
OF FIRE - REPLACE
FUSE AS MARKED
AFTER DISCONNECTING
UNIT FROM AC LINE.
- RISQUE D'INCENDIE -
REMPLACEZ FUSIBLE DU
TYPE INDIQUE APRES
DEBRANCHER DU SECTEUR.
IF
LOOP
RF
INPUT
COMPOSITE IF
RF
OUTPUT
SERIAL #
®
MADE IN THE U.S.A. BY
Installation 5
CONNECTIONS AND CONTROLS – All
connections to and from the HCP1550 are made
through the rear panel. Figure 3 shows a typical two
channel processing installation involving the
converting of an off-air signal and a CATV signal.
Additional channels can be processed by using
additional channel processor units and either
multi-port combiners or combinations of two-port
combiners.
INSTALLATION NOTES – Level adjustment
provides optimum performance in multichannel
installations. The channel processor outputs should
be checked periodically with a spectrum analyzer to
maintain a ±1 dB variation of adjacent channel
carriers. Aural/Visual (A/V) ratios should be held to
–15 dB or less. The ‘Output Level’ and ‘A/V Ratio’
controls are used respectively to make these
adjustments. If an output level of less than
+50 dBmV is required, add an attenuator of the
appropriate value to the modulator output.
Example: For an output level of +45 dBmV, add a
12 dB attenuator pad to the modulator output and set
the output level.
RACK MOUNTING – Adequate ventilation is very
important in multichannel installations. Units should
be spaced apart by at least one panel height
wherever possible, and some air movement is
advisable in enclosed rack cabinets. Excessive heat
will shorten component life and unit performance will
be degraded without proper cooling.
FCC PAR.76.612 – Certain cable channel
frequencies assigned to aviation and navigation
communications require frequency offsets. The
OUTPUT CHANNEL switches set the output
frequency for a visual carrier frequency of ‘xx.25’ or
‘xxx.25’ MHz only. The exact output frequency,
however, is relative to the input signal frequency and
any additional offset (plus or minus) set by the
OFFSET switches. Refer to the ‘Output Channel’ list
in the Installation section of this manual to determine
the required offset for a particular output channel.
Figure 3 - Typical Multiple Channel Processor Installation.
OUT
5-1000 MHz -130 dB RFI
OUT
3611
2-WA
Y SPLITTER
IN
2-WAY SPLITTER/
COMBINER
RF OUT
TO SYSTEM
HCP1550
HCP1550
OFF-AIR
CATV
