AR 10006896, Руководство по эксплуатации и обслуживанию

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Model 500T2G8
Rev E
21
To access the manual controls, remove the two 4-40 screws securing the emergency switch cover on the front
panel. Emergency bypass mode is selected by pushing the left-hand switch (S1) to the left. The center switch
(S2) toggles between high voltage on (left) and high voltage off (right). The right-hand switch (S3) selects
beam on in the left hand position, and beam off (RF off) in the right-hand position. There is a manual control
for the gain adjustment as well. This is a flat, square single-turn pot (R1).
CAUTION:
Do not adjust 20-turn pot R11; its function is to set the reflected RF
foldback level, and it is calibrated at the factory.
3.8 REMOTE IEEE-488 OPERATION
The TWTA is provided with a communication interface that conforms electrically to the IEEE-488 standard.
It permits remote emulation of OPERATE, STANDBY, and RESET push-buttons as well as access to
parameter measurements, system faults, gain adjustment, and control unit status. The following tables
summarize the commands and the return codes.
Table 3-3. Catalog of IEEE-488 Commands
Command Function Units Response format
RDSTAT Returns status code of processing of previous command (see
Table 3-4) STATUS=[ ]
RDFLT Returns system fault code (see Table 3-5) flt=[ ]
OPERATE; Emulates OPERATE push-button
STANDBY; Emulate STANDBY push-button
POWER:OFF; Emulate STANDBY push-button
RESET; Emulates RESET softkey
RDS/N Returns serial number s/n=[ ]
RDCONHR Returns console hours ConHr=[ ]
RDRFHR Returns RF hours RfHr=[ ]
RDEK Returns cathode voltage KV Ek=[ ]
RDEB Returns collector voltage KV Eb=[ ]
RDEF Returns heater voltage V Ef=[ ]
RDIF Returns heater current A If=[ ]
RDIW Returns helix current mA Iw=[ ]
RDTMPTWTF Returns TWT temp (°F) °F TWTF=[ ]F
RDTMPTWTC Returns TWT temp (°C) °C TWTC=[ ]C
RDTMPPSF Returns power supply temp (°F) °F PSF=[ ]F
RDTMPPSC Returns power supply temp (°C) °C PSC=[ ]C
RDTWTOTF Returns TWT overtemp warning setpoint (°F) °F TWTOTF=[ ]F
STWTOTF Sets TWT overtemp warning setpoint (°F) °F
RDTWTOTC Returns TWT overtemp warning setpoint (°C) °C TWTOTC=[ ]C
STWTOTC Sets TWT overtemp warning setpoint (°C) °C
RDPSOTF Returns power supply overtemp warning setpoint (°F) °F PSOTF=[ ]F
SPSOTF Sets p. s. overtemp warning setpoint (°F) °F
RDPSOTC Returns p. s. overtemp warning setpoint (°C) °C PSOTC=[ ]C