Alphabetical Listing of Commands
Appendix E
E-1
? Fast Data Transfer command
The ? command offers a method of reading a combination of instrument outputs
which are sampled at the same time, thereby ensuring that they are correlated.
The response to the ? command is the output(s), expressed in floating point mode,
specified by the present setting of the Curve Buffer Define (CBD) command (see
section 6.7.09) and separated by delimiter character(s) defined by the DD command.
Hence for example, if CBD is set to 19, the response to the ? command will be:
<X output, in floating point mode><delimiter>
<Y output, in floating point mode><terminator>
ACGAIN [n] AC Gain control
Sets the gain of the signal channel amplifier according to the following table:-
n AC Gain n AC Gain
0 0 dB 8 48 dB
1 6 dB 9 54 dB
2 12 dB 10 60 dB
3 18 dB 11 66 dB
4 24 dB 12 72 dB
5 30 dB 13 78 dB
6 36 dB 14 84 dB
7 42 dB 15 90 dB
ADC[.] n Read auxiliary analog-to-digital inputs
The response for ADC1 to ADC4 (n = 1 to 4 respectively) in fixed point mode is an
integer in the range -11000 to +11000, corresponding to voltages from -11.000 V to
+11.000 V, and in floating point mode it is in volts.
ADF n Auto Default
The ADF command performs an auto-default operation according to the following
table:
n Significance
0 All instrument settings are returned to their factory default values
1 All instrument settings, with the exception of the communications settings, are
returned to their factory default values
2 All instrument settings, with the exception of the communications settings, are
returned to their factory default values, except the oscillator amplitude is set to
0 V rms.
NOTE: If the ADF 0 command is used when the communications settings are at
values other than their default settings, then communication will be lost.
AMCENTERV[.] [n] Oscillator amplitude modulation center voltage command
The value of n sets the oscillator amplitude modulation center voltage; in fixed point
mode n is an integer in the range -10000 to +10000, corresponding to voltages from -
10.000 V to +10.000 V, and in floating point mode it is in volts.
NOTE: The span voltage plus the center voltage cannot exceed
10.000 V
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