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2-26
888-2685-001
12/24/07
WARNING: Disconnect primary power prior to servicing.
Section 2 Installation Verification &
Ranger Commissioning Manual
Press transmitter off button to turn off RF output power.
Measure the antenna and transmission line impedance prior to application of RF
power to the antenna system. The transmission line and antenna can be measured with
a network analyzer prior to application of RF.
!
CAUTION:
MEASURE THE AMOUNT OF RF POWER ON THE ANTENNA TRANSMISSION LINE
PRIOR TO MEASUREMENT WITH A NETWORK ANALYZER. IN SOME INSTANCES
THE RF ENERGY FROM NEARBY STATIONS MAY BE PRESENT ON THE
TRANSMISSION LINE IN AMOUNTS LARGE ENOUGH TO DAMAGE THE NETWORK
ANALYZER. IN CASES LIKE THIS MEASUREMENTS MAY BE TAKEN WITH
AMPLIFIERS USED TO AMPLIFY THE NETWORK ANALYZER SIGNAL SO THAT IT IS
LARGE ENOUGH TO OVERCOME THE RFI PRESENT ON THE SYSTEM TO BE
MEASURED.
Typical antenna system VSWR values are < 1.2:1 at the operating channel. If
verification of antenna system VSWR is not possible then proceed with RF turn on at
low levels and gradually increase power while monitoring reflected power levels. If
significant reflected power levels are noted then measurement of the system will be
required.
2.12
Parallel Remote Control Connections
External Parallel remote control units can interface at the External I/O Board in the rear
of the cabinet. J13 through J17 are for remote Control, Status and Analog readings. The
connectors are organized as follows:
•
J13 and J14 - Remote Transmitter Control Functions
•
J15 and J16 - Remote Status Outputs
•
J17 - Remote Analog Metering Outputs
NOTE:
The forward slash ( / ) in front of a signal name means active low. The signal /
INPUT 1 for example is activated by momentarily bringing that input low. Signal
names without the forward slash are considered active high. This convention is
used throughout the schematics.
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