Harris Platinum HT EL 2000LS, Техническое руководство

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2.5.3
Setting Transformers Taps
Check taps on the power supply in the exciter. Refer to figure
2-1, or drawing 839-7900-504. The logic supply 1A11PS1
located in the rear of the power module behind the 1A12 I/O
panel is tapped as shown in chart below
PRIMARY VOLTAGE
208-220 230-240
JUMPER CONNECTION 2 AND 3 2 AND 3
AC CONNECTION 1 AND 5 1 AND 4
TRANSFORMER PRIMARY TAPS CHECKED
2.5.4
Input Signals
The input signals and remote control I/O are located on 1A12.
See Table 2-2.
NOTE: The coax wiring for the External Precise Frequency
Control (PFC) option is installed in the cabinet. If the PFC
option is purchased the wiring will be added to the exciter.
INPUT SIGNALS CONNECTED
2.5.5
Setup Jumpers
Check the set-up jumpers, located in the exciter 1A2 and Inter-
face Logic 1A3. Jumpers are normally shipped from the factory
in the positions shown in Table 2-2. They may be changed if
needed.
JUMPERS SET FOR CORRECT CONFIGURATION
2.5.6
Backup Battery
CAUTION
DO NOT USE RECHARGEABLE BATTERIES
The battery holder will accept three size AA (NEDA 15A) 1.5
Volt batteries. These batteries furnish power to hold the trans-
mitter status in the control system and control the return to
operation when AC power returns. The batteries should be
replaced as part of a regular mantenance schedule.
2.5.7
RF Output Coax Connections
(Refer to 843-5285-110)
The RF output connections, 1A15J1 for visual and 1A15J2 for
aural are located on the top of the cabinet. Make any desired
VSWR measurements of the RF plant before making final
connections to the cabinets.
2.5.8
Interlocks
External interlocks are connected to REMOTE COMMAND
1A12J21-7. A contact closure to ground must be present to turn
on the transmitter. If this interlock is not used, 1A12J21-7 must
be jumpered to ground.
The external contact closure or other device must sink 50
microamps to less than 0.5 volts. Open circuit voltage is +5V.
INTERLOCK WIRING INSTALLED
2.6
Transmitter Check Out
2.6.1
Pre-turn on checks
CAUTION
BEFORE PROCEEDING WITH CHECK OUT, INSPECT THE
TRANSMITTER FOR AC POWER SHORTS, LOOSE HARDWARE,
WIRING ERRORS, UNCONNECTED WIRES, MISSING PARTS, AND
DEBRIS.
2.6.2
Initial Turn-on Sequence
The following procedures are the sequential steps to safely turn
on the transmitter, and must be performed in the order listed. It
is recommended that the installation personnel read the general
description in section one, the controls and operation material
in section three, and these procedures before starting.
a. MODULES MUST NOT BE INSTALLED AT THIS TIME
b. Apply 1 volt p-p video to exciter video input.
c. The loss of video indicator should extinguish immediately
or after the loss of video times out depending on option
that is jumper selected.
d. Press transmitter ON pushbutton.
e. Open the external interlock. The external interlock lamp should
be illuminated and the transmitter should shut off. Press ON
button. The transmitter should not come on. Close the interlock
circuit. The external interlock lamp should extinguish.
f. Verify operation of RAISE and LOWER switches.
g. If the system has a remote control, place transmitter in the
REMOTE mode and check for operation of transmitter
ON/OFF and RAISE/LOWER from the remote.
h. Verify that LOCAL mode inhibits remote commands.
i. Return exciter to minimum power by depressing and
holding LOWER commands for about 15 seconds.
j. Measure the 50 volt supply by using the multimeter on the
front of the exciter. It should measure 50 volts.
k. Press transmitter OFF pushbutton.
2.6.3
Module Installation
The modules may now be installed. Refer to factory test data for
placement of modules by serial number and slot number. There are
three types of modules, DRIVERS, HIGH POWER DRIVERS and
PA’s. The DRIVERS are keyed to be either standard or high power
drivers and will not fit into a PA slot. Use of a PA in a drive slot is
for emergency only. Although each type is interchangeable from
aural to visual and will work in any like socket, when starting out
it is best to reassemble them in the same locations as tested. Keep
a record of any changes for future reference.
Make sure each module is completely seated.
CAUTION
DO NOT USE EXCESSIVE FORCE INSTALLING MODULES INTO
THE SLOTS.
Section II - Installation
888-2457-001 2-5
WARNING: Disconnect primary power prior to servicing.