Nautel FM10, Технические инструкции

Страница: 54 / 200

10 000 WATT FM BROADCAST TRANSMITTER
FM10
Page 3-11
15 July 1997
Table 3-2 Control/Monitor Function Controls and Indicators
PANEL MARKING/
REF FIG NOMENCLATURE FUNCTION
DES NO. USED IN TEXT
A13A1DS1 MD-7
MD-8 PA FAIL ALARM When turned on, indicates failure of one or more
amplifiers within an RF power amplifier module.
A13A1DS2 MD-7
MD-8 COMBINER MATCHING When turned on, indicates the RF output level is too
low for the level of PA volts being applied to the RF
power amplifier modules. Normally caused by
thirteen or more power amplifiers not contributing to
the RF output. Latching circuit maintains turned on
state when cause of alarm has been removed and
operation has returned to normal.
A13A1DS3 MD-7
MD-8
MODULE RF DRIVE
ALARM
When turned on, indicates that the RF drive level at
the input to one or more RF power amplifier modules
is/was below the acceptable level. Latching circuit
maintains turned on state when cause of alarm has
been removed and operation has returned to normal.
A13A1DS4 MD-7
MD-8 MODULE
TEMP ALARM
When turned on, indicates temperature inside one or
more RF power amplifier modules is/was in excess of
85
°
C. Appropriate
POWER MODULE ALARM
lamp(s)
will also be on. Latching circuit maintains turned on
state when cause of alarm has been removed and
operation has returned to normal.
A13A1DS5 MD-7
MD-8 INTERLOCK OPEN When turned on, indicates one or more external safety
interlock switches are open and the RF power stages
have been inhibited. Latching circuit maintains turned
on state if cause of alarm is removed and operation
has returned to normal.
A13A1DS6 MD-7
MD-8
AC POWER PHASE
ALARM
When turned on, indicates that one or more of the AC
power phases have been lost.
A13A1DS7 MD-7
MD-8
AC POWER HIGH
ALARM
When turned on, indicates AC power source is/was
15% higher than the nominal input voltage for the
power transformer's selected primary winding taps.
Latching circuit maintains turned on state when AC
power is restored to an acceptable level.
A13A1DS8 MD-7
MD-8 AC POWER LOW
ALARM
When turned on, indicates AC power source is/was
15% lower than the nominal input voltage for the
power transformer's selected primary winding taps.
Latching circuit maintains turned on state when AC
power is restored to an acceptable level.