User Manual

Table Of Contents
Maintenance RF-Orchestra!™ Transmitter Installation and Operation
6-6 6880493G02-C July 2000
FM Clipping Detected
Clipping was detected during an FM transmission. Power Control must be
Enabled (parameter 992 set to 1) for this disable source to cause the trans-
mitter to shutdown. Several conditions may cause FM clipping.
PA A/D Read Fail
The RF-O! transmitter was unable to read one of the PAs A/D converters.
Check a99 or a 104 log to determine specific PA having the problem.
PA Current Out of Range Not Currently Supported
28V Reference Out of Range Not Currently Supported
14V Reference Out of Range Not Currently Supported
UHSO Failure The Ultra High Stability Reference Oscillator Has Not Been Detected.
Pendulum Not Locked 16.8MHz Pendulum Reference Not Phase Locked.
Pendulum Not Detected 16.8MHz Pendulum Reference Not Detected.
Exciter SPI Read Fail Failed to Read the Exciter A/D Converter.
Circulator Load Temp Exceeded
The RF-O! transmitter has detected that the Circulator Load Thermal
Switch, which is connected to the RFO backplane at J12, has triggered.
Parameter 1030 must be set to 1 for this feature to work. By default 1030 is
set to 1 (Enabled).
PA Failure(s)
The number of PA failures was high enough that the transmitter was unable
to continue paging.
PA Shutdown Temp Exceeded
The difference between any one of the installed PA’s temperature and the
ambient temperature is greater than the number of degrees Celsius speci-
fied in parameter 1024. Read parameter 1026 to see current ambient tem-
perature, as read on the OCM board. Use RFO FIPS: a 192 SHMI 4 to
monitor PA and Ambient Temperature readings.
Amplitude Alignment Bad
At power up, it was determined that the Amplitude Alignment values within
the Exciter EEPROM are not valid.Power Control must be disabled (RFO
FIPS: w 992 0), then amplitude alignment (RFO FIPS: a 76) must be per-
formed. This disable source is cleared once Amplitude Alignment is suc-
cessfully performed.
Power Leveling Out of Range
The automatic power leveling feature of Power Control attempted to level the
power by more than 1.5 dB or less than -1.5 dB. This disable signals that the
amplitude alignment and/or wattmeter alignment is possibly not correct.
Table 6-2: Paging Disabled Definitions (Sheet 2 of 4)
Disable Source Description