Ametek 7280 Instruction Manual page 194

Appendix F, ALPHABETICAL LISTING OF COMMANDS
ASTEP[.] [n]
ASTOP[.] [n]
AUTOMATIC [n] AC Gain automatic control
AXO
BURSTTPP [n]
BYTE [n]
CBD [n]
F-2
Oscillator amplitude sweep step size
Sets the amplitude step size for a subsequent sweep of the internal oscillator
amplitude, in the range 0 to 1.000 V
In fixed point mode, n is in millivolts rms and in floating point mode n is in volts rms
Oscillator amplitude sweep stop amplitude
Sets the stop amplitude for a subsequent sweep of the internal oscillator amplitude, in
the range 0 to 1.000 V
In fixed point mode, n is in millivolts rms and in floating point mode n is in volts rms
n Status
0 AC Gain is under manual control, either using the front panel or the ACGAIN
command
1 Automatic AC Gain control is activated, with the gain being adjusted according
to the full-scale sensitivity setting
Auto-Offset
Sets the burst mode time per point rate for ADC1 and ADC2
n sets the time per point for the Variable Rate burst modes in microseconds, as
follows:-
When storing only to ADC1:
(i.e. TADC 2, TADC 4, TADC 6, TADC 8, TADC10 and TADC12)
25 ≤ n ≤ 5000
When storing to ADC1 and ADC 2:
(i.e. TADC 3, TADC 5, TADC 7, TADC 9, TADC11 and TADC13)
56 ≤ n ≤ 5000
Digital port output control
The value of n, in the range 0 to 255, determines the bits to be output on those lines
of the rear panel digital port that are configured as outputs. Hence, for example, if
PORTDIR = 8 and BYTE = 0, all outputs are low, and when BYTE = 255, all are
high.
Curve buffer define
Defines which data outputs are stored in the curve buffer when subsequent TD (take
data), TDT (take data triggered) or TDC (take data continuously) commands are
issued. Up to 17 (or 22 in dual reference and dual harmonic modes) curves, or
outputs, may be acquired, as specified by the CBD parameter.
The CBD parameter is an integer between 1 and 131,071, being the decimal
equivalent of a 17-bit binary word. In either of the dual reference modes, it is an
integer between 1 and 4,194,303, being the decimal equivalent of a 22-bit binary
number. When a given bit is asserted, the corresponding output is selected for