SEA 157S, Предварительное руководство по обслуживанию

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4. INSTALLATION
4.1 PRELIMINARY
CHECK:
Prior to installation, the transmit frequency, peak frequency
deviation and RF power output level should be checked on a
calibrated FM service monitor or equivalent equipment. See
Section 6 of this manual for more detailed procedures.
4.2 SHELF OR OVERHEAD MOUNTING:
See Figure 4.1 for dimension drawings of SEA 157S.
4.3 BULKHEAD
MOUNTING:
See Figure 4.2 for Flush Mount Kit Drill Template for SEA 157S
A special bulkhead mounting bracket (SEA P/N KIT-0157-30) is
available from SEA COM which permits through-bulkhead mounting of
the SEA 157S. The required depth behind the bulkhead is
approximately 11.5 inches (290 mm). Contact SEA COM Corp. at
(425) 771-2182.
4.4 POWER SUPPLY WIRING:
Use a 13.6Vdc +/-15% (11.6Vdc to 15.6Vdc) DC power source for
proper operation. Direct connection to the battery or power
supply is recommended. Connect the RED positive (+) power lead to
the positive supply rail. The BLACK negative (-) power lead
connects to the negative supply rail. NOTE: The chassis of the
SEA 157S is connected to the negative supply rail.
CAUTION: If the power wires are connected backward, i.e., reverse
polarity and power is accidentally applied to the radiotelephone,
the fuse will blow. It is also likely that the reverse-polarity
protection diode, D2, which is near the power lead connections on
the main circuit board will also be damaged. Application of
voltages greater than the maximum rated voltage will produce the
same result. (Refer service of this equipment to a qualified
technician.)
4.5 ANTENNA
WIRING:
Use only the best available antennas, 50 ohm coaxial antenna
feedline cable and connectors. The antennas must be vertically
polarized. The antenna cables should be terminated with properly
installed PL-259 (Type UHF male) connectors which should be
securely screwed to the antenna connectors on the rear panel of
the transceiver. All antenna feedline connections should be
carefully protected from the weather.
4-1