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CHPA
S
ERIES
D
OC
.01023245
R
EV
.R
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3-13
Table 3-7. Query Commands
ASCII Byte
Decimal Commands
0 48
ID/Version Query
. An eight-character string will be returned that identifies the
CHPA model and computer interface version.
1 49
Summary Status Query
. Two bytes of status are returned
2 50
Secondary Status Query.
Two bytes of status are returned.
3 51
Fault/Miscellaneous Status Query
. Four bytes of fault conditions and general
information are returned. The information returned mimics the front panel
report. This query will store faults until a Cancel or Reset from any source
clears all bits.
4 52
Info/Error Data Query.
Two bytes are returned that indicate activity since the
last Info/Error Data Query. The response is port sensitive and reflects the
status of the port (Remote or CIF) queried.
5 53
Not
used
6 54
RF Output Power in dBm Query
. Four ASCII characters in the form NN.N are
returned. Leading zero is replaced with a blank.
7 55
RF Output Power in Watts Query
. Four ASCII characters in the form NNNN
are returned. Leading zeros are blanked.
8 56
Attenuator Setting Query
. Four ASCII characters in the form NN.N are
returned. Leading zero is blanked.
(See Note 2)
9 57
Not
used
: 58
Low RF Alarm Trip-point Query (Watts)
.
(see note 1)
; 59
High RF Alarm Trip-point Query
(Watts).
(see note 1)
< 60
Low RF Fault Trip-point Query
(Watts).
(see note 1)
= 61
High RF Fault Trip-point Query
(Watts).
(see note 1)
> 62
Meter Query.
This command returns meter readings (without the units)
according to the following formats. Leading zeros are replaced with blanks.
Each reading is delimited by a space (ASCII 20 hex 32 dec).
RF Output (dBW)
NN.N dBW
RF Output (Watts)
NNNN W
Attenuator Setting
NN.N dB
(see note 2)
Helix Voltage
NN.NN kV
Helix Current
NN.N mA
Reflected RF
NNN W
Beam Current
NNNN mA
? 63
Elapsed Time Query
. This command will return the elapsed time meters
separated by a space (ASCII 20 hex 32 dec) Heater Elapsed Time Meter
NNNNNN Beam On Elapsed Time Meter NNNNNN
Table 3-7 Notes:
1.
These commands return four ASCII characters in the form NNNN. Leading zeros are blanked.
2.
For CHPA Protocol Option, (DIP Switch S1-Switch #2 of Interface CCA is ON) Attenuator Setting is of the form NN.N0 dB.