6.1 Self-test
6-6
RF UNIT MONITOR
Each monitor-value is detected in the transceiver unit.
Note that monitor values of TUNE IND, R. MONITOR, HEATER, TUNE OUT,
TRIGGER FREQ and MAG CURRENT vary with the setting of the Range/Pulse length.
See pages 6-42 for details.
Table 6.1.4 Transceiver Unit Monitor Display
Display Description
TEMPERATURE Detects the temperature of the RFC board.
TUNE IND
Tuning indicator voltage outputted from the IF AMP board. It is used for Auto-tuning
and the tune indicator.
HV
HV voltage outputted from the HV-9017 board in the Processor unit, which is applied
to the pulse transformer. In case of 12 kW: 310 to 350 VDC, and 25 kW or more: 520
to 580 VDC.
R.MONITOR DI MONITOR voltage from the MIC
MAG CURRENT Magnetron current, which is detected in the MD board.
HEATER Magnetron heater voltage outputted from the PWR (RF) board.
12 V +12 VDC voltages outputted from the PWR (RF) board.
-12 V -12 VDC voltages outputted from the PWR (RF) board.
5 V +5 VDC voltages outputted from the PWR (RF) board.
32 V
+32 VDC voltages outputted from the PWR (RF) board. It is used for the power supply
of the TUNE circuit of the MIC.
TUNE OUT TUNE control voltage of the MIC. It varies with the MIC.
TRIGGER FREQ
Shows the transmission trigger frequency. It varies with the pulse length/range and
indicates the frequency between 450 Hz and 3000 Hz.
ANT SPEED
The antenna speed is set from the bearing pulse detected on the B.P GEN board. The
revolution varies with the types of the gearbox, that is 24/42 rpm in X-band and
21/26/45 rpm in S-band.
U20
TEMP sensor
TEMP OUT AD
IF AMP p.c.b
TUNE IND AD
HV(HV PROTECT) AD
R.MON(D MON) AD
MAG CURRENT (MAG CURRENT LVL) AD
HEATER AD
12V AD
-12V AD
5V AD
32V AD
TRIGGER 1-4
ANT SPEED(B.P)
PWR p.c.b
Mag.
MD p.c.b
MIC
TUNEIF
RU
Antenna
Pulse
Transformer
U19:
Gate Arrey
U17:
RFC CPU
RF TXD
RF RXD
From/To SPU pc.b
HD/BP
GEN p.c.b
A/D
TUNE
RFC p.c.,b
Fig. 6.1.5 Diagram of Transceiver Unit Monitor
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