Ametek 7124 Instruction Manual page 167

SWEEP [n] Oscillator frequency and amplitude sweep control
n Sweep status
0 Stop
1 Start/continue frequency sweep
2 Start/continue amplitude sweep
3 Start/continue frequency sweep and amplitude sweep
5 Pause frequency sweep
6 Pause amplitude sweep
7 Pause frequency sweep and amplitude sweep
9 Link frequency sweep to curve buffer acquisition
10 Link amplitude sweep to curve buffer acquisition
11 Link frequency and amplitude sweep to curve buffer acquisition
This command is used to start or stop the internal oscillator frequency or amplitude
sweep, or to specify that the sweep should be linked to the curve buffer data
acquisition.
In the normal mode, when a frequency and/or amplitude sweep has been defined,
applying SWEEP with a parameter of 1 2 or 3 will start it. The sweep can be paused
using the command with the correct value of n for the sweep in progress. For
example, if a frequency sweep is started using SWEEP 1 then it can only be paused
by sending SWEEP 5. Similarly, it can only be continued by sending SWEEP 1. The
command SWEEP 0 will, however, stop either or both types of sweep.
When n is equal to 9, 10 or 11 the instrument is set to link the oscillator frequency
and/or amplitude sweeps to the curve buffer. The SWEEP command continues to
function as a write/read command except when the curve buffer acquisition is
actually running. In such cases, the SWEEP command changes to read-only and will
only report values of 9, 10 or 11, indicating what type of linking is active. The sweep
can then only be stopped by stopping the curve buffer, using the HC command.
However, the user can still determine the progress of the sweep using the curve
buffer monitor "M" command and the OF and/or OA (oscillator frequency and
amplitude) commands.
MENABLE [n] Oscillator amplitude/frequency modulation enable command
The value of n enables the oscillator amplitude modulation function in accordance
with the following table:
n Function
0 Oscillator amplitude/frequency modulation disabled
1 Oscillator amplitude modulation enabled
2 Oscillator frequency modulation enabled
AMCENTERV [n][.]
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
AMDEPTH [n] Oscillator amplitude modulation depth control
The value of n sets the oscillator amplitude modulation depth in percent, from 0 to
100
Chapter 6, COMPUTER OPERATION
Oscillator amplitude modulation center voltage command

10.000 V
6-21