User's Manual

ALLOWED” a remote user logged into Security Level 3 can put the DME station in Local Mode from
the PMDT and change all parameters as if connected directly to the cabinet in the shelter. When set to
“~NOT ALLOWED” the system can not be put in Local Mode from the PMDT and remote parameter
changes are blocked throughout the software.
1.6 Inspection
Prior to energizing the equipment, a visual inspection is made to eliminate circumstances that could cause
power-up failures.
a. Visually inspect wire, RF coaxial cables and connectors for corrosion, loose connectors and
improperly assembled connectors.
b. Insure all terminal boards are free of foreign objects such as pieces of wire or other objects that could
cause electrical shorts within the equipment. Remove foreign objects as necessary.
c. Inspect the battery backup units to ensure that all terminals and connectors are tight and that there are
no metal shavings or other objects that could cause damage to the equipment.
1.7 Initial Start-up and Preliminary Testing
The following paragraphs detail the step-by-step procedures for initial start-up and preliminary testing of
the DME.
1.7.1 Input Voltage Checks
After the AC and DC power has been connected to the DME transmitter. It is necessary to check the input
power to insure the proper voltage is applied to the system.
a. Assure that the DME AC and DC circuit breakers to the OFF position.
b. Set the shelter primary AC power circuit breakers to the ON position.
c. Using an AC voltmeter check voltage across the AC Monitor 1A22TB3-1 (LINE) to 1A22TB3-2
(NEUTRAL) terminals. Insure the voltage meets the range specified in section Table 1-1 Error!
Reference source not found..
d. Turn on the DME DC circuit breaker while leaving the AC circuit breakers OFF.
e. Using a DC voltmeter check voltage across 1A20 BCPS1 E7 (BATT_POS) to E9 (GND). Insure the
voltage is 42 to 50Vdc.
f. For dual equipment check voltage across 1A21 BCPS2 E7 (BATT_POS) to E9 (GND). Insure the
voltage is 42 to 50Vdc.
g. Turn DC circuit breakers to the OFF position.
1.7.2 Installing Modules in Transmitter Cabinet
Since the DME transmitter cabinet is shipped separately from its electronic modules, it will be necessary to
install them into the transmitter equipment cabinet. Insure AC and DC circuit breakers are set to the OFF
position.
CAUTION
Many of the modules used in the DME transmitter contain
Electrostatic Discharge (ESD) sensitive components. ALWAYS
wear protective wrist strap when installing modules or CCAs.
Before modules are installed into transmitter cabinet, check
modules or CCAs for cracked or broken connectors, bent pins, and
loose hardware. Report any damage immediately.
1.7.3 Turn on Procedure
a. Verify all assemblies are properly installed and are fully seated.
b. Turn AC and DC circuit breakers to the ON position.
c. Verify the PWR_OK LEDs are lit on all card cage modules.
d. Verify the CPU_OK LEDs are lit on the RTC, Monitor, and RMS assemblies.