Keithley 3930A Operator's Manual page 77

SECTION 4
GPIB
Interface
4.3.2
Model 3930A Inquiry Messages
When the header is on (HDR l), each inquiry response
will include a three-character identifying mnemonic.
When the header is off (HDR O), the mnemonic not sent,
and only the parameter itself is transmitted. Each pa-
rameter begins with a space or minus sign (-1 to indicate
phlity.
Table 4-11. Main Parameter Inquiry Messages
Program
Inquiry Description
Code Response Format
Setting
=EQUENCY
?FRQ NR3 format: ll-digit mantissa, Yes
Oscillation frequency inquiry (frequency: Hz)
2.digit exponent.
Example: FRQ 1000.0000000E+03 (1MHz)
CEmOD
Oscillation period inquiry (Period: s)
?PRD NR3 format: 6-digit mantissa, Yes
2.digit exponent.
Example: PRD 3.33333Ea3 (3.333331~ =
3OOHz)
AMPLITUDE ap-p,
Output amplitude inquiry (VP-p)
?AMV NR3 format:
Yes
In AUTO output range:
3.digit mantissa, 2.digit exponent
In IXD output range:
4-digit mantissa, Z-digit exponent
Example: AMV lO.OE+OO 0OVp-p)
&$I'LITUDE (Vms)
Output amplitude inquiry Wms)
(AUTO output range mode only)
?AMR
NR3 format: 3-digit mantissa, Yes
Z-digit exponent.
Example: Ah4R 1.23100 (1.23Vrms)
NLJTUDE UBV)
Output amplitude inquiry (dBV)
(AUTO output range mode only)
?AMD
NR3 format: 3-digit mantissa, YE
2-digit exponent
Example: AMD Ol.OE+OO (1dBV)
QlFSET
DC offset voltage inquiry (V)
?OFS NRT? format:
In AUTO output range mode:
3-d@ mantissa, 2-digit exponent
In FXD output range mode:
Yes
4-d@ mantissa, 2-digit exponent
Example: OFS -12.3E+OO (-12.3V)
FuN_TION
Output wavefom inquiry
?FNC NR1 format: 1 digit, same as setting value.
Yes
Example: FNC 1 (Sine wave)
l?l.QDE
Oscillation mode inquiry
?MOD
NRl format: 1 digit, same as setting value.
Yes
Example: MOD 0 (CONT)