AR 10009284, Operating And Service Manual

Page: 35 / 62

Model 40T26G40A
Rev A 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