DRAKE 550TCP Instrukcja obsługi - Strona 5

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CONNECTIONS AND CONTROLS – All connections to
and from the 550TCP are made through the rear panel.
Figure 3 shows a typical two channel processing
installation involving the converting of off-air signals.
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.
550TCP
®
MADE IN THE U.S.A. BY
RF
OUTPUT
550TCP
®
MADE IN THE U.S.A. BY
RF
OUTPUT
2-WAY SPLITTER/
OUT
OUT
RFI
dB
-130
MHz
5-1000
SPLITTER
2-WAY
3611
IN
RF OUT
TO SYSTEM
COMPOSITE IF
IN
OUT
IF
LOOP
COMPOSITE IF
IN
OUT
IF
LOOP
COMBINER
Figure 3 - Typical Multiple Channel Processor Installation.

Installation

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- The synthesizer in the output section of
the 550TCP has been programmed to comply with FCC
requirements for offsets on cable channel frequencies
assigned to aviation and navigation communications. The
programmed offset for each channel is listed in Tables 3
and 4 in the Installation section of this manual.
OFF-AIR
T-7 TO T-14
UP CONVERTER
IN
OUTPUT
OFF-AIR
T-7 TO T-14
UP CONVERTER
IN
OUTPUT
CAUTION:
- RISK
FUSE
OF FIRE - REPLACE
1 / 2 A, 250 V
RF
FUSE AS MARKED
SLO - BLO
INPUT
AFTER DISCONNECTING
UNIT FROM AC LINE.
ATTENTION:
- RISQUE D'INCENDIE -
REMPLACEZ FUSIBLE DU
TYPE INDIQUE APRES
DEBRANCHER DU SECTEUR.
CAUTION:
- RISK
FUSE
OF FIRE - REPLACE
1 / 2 A, 250 V
RF
FUSE AS MARKED
SLO - BLO
INPUT
AFTER DISCONNECTING
UNIT FROM AC LINE.
ATTENTION:
- RISQUE D'INCENDIE -
REMPLACEZ FUSIBLE DU
TYPE INDIQUE APRES
DEBRANCHER DU SECTEUR.
3
115 VAC, 60Hz
30 WATTS
115 VAC, 60Hz
30 WATTS