Model 200T8G18A/250T8G18
Rev D
21
Table 3-6. Catalog of System State Codes
(The RDLOGIC command causes the TWTA to send a string containing an operational state code consisting
of 4 ASCII characters representing hex digits. The response is in the form
Sys:[w][x][y][z][eol]
where the hex
values of
[w],[x],[y] and [z]
are formed as shown below)
z bit
Meaning
0 (LSB)
High voltage on
1
Transmit on
2
Remote
mode
3 (MSB)
Fault
y bit
Meaning
4 (LSB)
Heater time delay expired
5
Under forward power warning
6
Foldback
active
7 (MSB)
Inhibit mode
x bit
Meaning
8 (LSB)
External inhibit
9
Interlock
open
10
(not
used)
11 (MSB)
(not used)
w bit
Meaning
12 (LSB)
(not used)
13
Sleep Mode Active
14
(not
used)
15 (MSB)
(not used)
Table 3-7. *STA?; Response Codes
(The command *STA?; causes the TWTA to send a string indicative of the current system state)
*STA?; response
Meaning
SLEEP
Sleep Mode active (heater off)
WARM-UP
System is in heater time delay.
STANDBY
System is ready to allow high voltage on
OPERATE
High voltage is on and beam is on
FAULT
High voltage is off and system requires reset
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