Specifications

5/9/13 888-2857-001 5-27
WARNING: Disconnect primary power prior to servicing.
Section 5 Maintenance and Alignments
Platinum VAX-C Series
5.10.1 Setting VAX-C Date and Time
The VAX-C date and time should be set after the date and time battery is installed. The
date/time can be set using either the web browser or the LCD screen and control
buttons. Use the following procedure to set the date and time using the web browser.
STEP 1 Use the web browser to log into the VAX-C using the front or rear
ethernet connectors.
STEP 2 Navigate to Tx Home>Exciter Home>Setup>System Settings>Next. To
manually set time and date select None as UTC Source. If the
transmitter is attached to a network NTP settings can be selected that
will automatically set the time. If a GPS is connected the GPS time can
be used to set the time.
STEP 3 Set the time and date by clicking in each box.
a. A keyboard will appear. Type in the value for that box, then press enter.
b. Repeat step A for each box.
c. The time is entered in the 24 hour format.
d. This screen does not indicate the correct time. Correct time and date are indicated
in the Status > Signal Processor screen.
5.10.2 Battery Backup (UPS) Option
The following procedure describes installation of the VAX-C Battery Backup (UPS)
option 9710051012G. The battery backup board described is compatible with the
9710051011G ASM-Power Module which contains the 901-0215-241G PWA, LVPS
Distribution board.
The battery backup (UPS) option is useful in systems that require synchronized timing
as in SFN networks. The UPS battery pack keeps modulator section operational for one
minute and holdover components (clock oven and the GPS receiver) operating for
approximately 15 minutes if the batteries are fully charged.
The battery backup (UPS) can be disabled during shipment or storage by installing a
connector/jumper as shown in Figure 2-6 on page 2-19.