Auxiliary Outputs - Ametek 7280 Instruction Manual

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.

6.4.07 Auxiliary Outputs

DAC[.] n [n ] Auxiliary DAC output controls
1 2
Sets the voltage appearing at the DAC1 and DAC2 outputs on the rear panel.
The first parameter n
The value of n specifies the voltage to be output.
2
In fixed point mode it is an integer in the range -12000 to +12000, corresponding to
voltages from -12.000 V to +12.000 V, and in floating point mode it is in volts.
PORTDIR [n] Digital port direction control
The value of n determines which of the eight lines on the digital port are configured
as inputs and which as outputs. The parameter n is a decimal number whose bit-wise
interpretation defines whether the corresponding line is an input or output. The line is
an input if the corresponding bit is a "1". For example:
n status
0 All lines configured as inputs
1 D0 = output, D1 - D7 = inputs
2 D1 = output, D0 and D2 - D7 = inputs
4 D2 = output, D0 - D1 and D3 - D7 = inputs
8 D3 = output, D0 - D2 and D4 - D7 = inputs
16 D4 = output, D0 - D3 and D5 - D7 = inputs
32 D5 = output, D0 - D4 and D6 - D7 = inputs
64 D6 = output, D0 - D5 and D7 = inputs
128 D7 = output, D0 - D6 inputs
255 All lines configured as outputs
Chapter 6, COMPUTER OPERATION
, which specifies the DAC, is compulsory and is either 1 or 2.
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