User Manual

MCA9129-90-A Installation & Service Manual
Ó Copyright Powerwave Technologies, Inc., July 2001. All rights reserved
044-05060 Rev. C 3-4 July 2001November 2002
260 watts. If an over power condition occurs the MCA is immediately disabled. Theand the LPA
DISAB indicator will illuminate and the OVER PWR indicator will blink at a 1Hz rate. A timer is
started and the over power fault counter is incremented. After five seconds the MCA is enabled
and the fault is analyzed. If the fault exists, the MCA is again disabled and the counter is incre-
mented. If the count equals five before the timer reaches 15 minutes, the MCPA will enter fault
mode. Fault mode will disable the MCPA. The OVER PWR and LPA DISAB indicators will illumi-
nate and a summary fault will occur signaling the shelf that the MCPA is disabled. In fault mode
the LED indications are latched. Toggling the reset switch will enable the MCPA and clear the
summary alarm and latched indicators. If 15 minutes elapse before the counter reaches five, the
counter and timer will reset to zero.
3-3.7 3-3.3 High Temperature Indicator (HIGH TEMP)
Red LED. When lit, indicates that the main amplifier heat sinkbase plate temperature has ex-
ceeded 750 °C. If a high temperature condition occurs a timer is started and the high temperature
fault counter is incremented. After five seconds the fault is analyzed. If the fault exists, the
counter is incremented. If the count equals 25 before the timer reaches 15 minutes or if the base
temperature exceeds 85 °C, the MCPA will enter fault mode. Fault mode will disable the MCPA.
The HIGH TEMP and LPA DISAB indicators will illuminate and a summary fault will occur signal-
ing the shelf that the MCPA is disabled. In fault mode the LED indications are latched
If the tem-
perature drops below 65 °C, the amplifier will recover to the original enabled state and the alarm
condition will be cleared. Toggling the reset switch will enable the MCPA and clear the summary
alarm and latched indicators. If 15 minutes elapse before the counter reaches 25, the counter
and timer will reset to zero.
3-3.8 3-3.4 VSWR Indicator (VSWR)
Red LED. When lit, indicates that the reflected power detected at the amplifier output exceeds 70
46.5 dBmwatts. If a VSWR condition occurs a timer is started and the VSWR fault counter is in-
cremented. After five seconds the fault is analyzed. If the fault exists, the counter is incremented.
If the count equals 25 before the timer reaches 15 minutes or if the reflected power level exceeds
150W, the MCPA will enter fault mode. Fault mode will disable the MCPA. The VSWR and LPA
DISAB indicators will illuminate and a summary fault will occur signaling the shelf that the MCPA
is disabled. In fault mode the LED indications are latched. Toggling the reset switch will enable
the MCPA and clear the summary alarm and latched indicators. If 15 minutes elapse before the
counter reaches 25, the counter and timer will reset to zero.
3-3.9 DC Fail Indicator (DC FAIL)
Red LED. When lit, indicates that one of the internal DC voltages dropped below or exceeded the
safe threshold level (+21 V<+27 V<+30 V, +14 V<+15 V<+16 V, +4.5 V<+5 V<+5.5 V, or
-5.5 V<-5 V<-4.5 V). If a DC fail condition occurs a timer is started and the DC fail counter is in-
cremented. After five seconds the fault is analyzed. If the fault exists, the counter is incremented.
If the count equals 25 before the timer reaches 15 minutes, the MCPA will enter fault mode. Fault
mode will disable the MCPA. The green indicator representing the invalid voltage will turn-off, the
DC FAIL and LPA DISAB indicators will illuminate and a summary fault will occur signaling the
shelf that the MCPA is disabled. In fault mode the LED indications are latched. Toggling the re-
set switch will enable the MCPA and clear the summary alarm and latched indicators. If 15 min-
utes elapse before the counter reaches 25, the counter and timer will reset to zero. If the DC in-
put voltage exceeds +30 volts, the MCA will be disabled instantaneously, as indicated by the illu-
mination of the LPA DISAB indicator. The +27V and DC FAIL indicators will alternatively blink at a
1Hz rate. A timer is started and the DC fail counter is incremented. After five seconds the voltage
is measured. If the fault exists the counter is incremented. If the count equals five before the
timer reaches 15 minutes, the MCPA will enter fault mode. The +27V indicator will turn off, the
DC FAIL and LPA DISAB indicators will illuminate and a summary fault will occur signaling the
shelf that the MCPA is disabled. Toggling the reset switch will enable the MCPA and clear the