RS-232C INTERFACE - Section 6
MTS-1700 SERIES OPERATION AND REFERENCE MANUAL 6-25
CU A002 15A
MANTA TEST SYSTEMS
•
Valid values are 1 - 16,383 (binary offset code) when 14 bit data definition mode
is selected
1 = -
x VmaxRMS for voltages or -
x ImaxRMS for current
2 = - (8190/8191) x
VmaxRMS) for voltages or - (8190/8191) x
ImaxRMS) for current
.
.
8192 = 0 output
8193 = (1/8191 x
VmaxRMS) for voltages or (1/8191 x
ImaxRMS) for current
.
.
16383 =
Vmax for voltages or
x Imax for current
6.2.14.2 USAGE.
The programmable waveform commands allow one to replace the normal sine wave voltage and current
outputs with a user-defined waveform.
The waveform is defined by 720 consecutive data points (one for each half degree), or 1440 data points
(one for each quarter degree) if the 14 bit Playback mode is selected. Waveform data points are
downloaded to the MTS-1710 using the PWD command. Once the waveform is defined and enabled, its
amplitude, frequency, harmonic and phase may be manipulated using the front panel controls.
The waveform is defined by an 8-bit or 14-bit binary offset code where 0 corresponds to the maximum
negative output, and 255 (8-bit mode) or 16383 (14-bit mode) corresponds to the maximum positive
output. See Section 7.3.1 for more details on this. Although the waveform is defined to 8 bit resolution, the
actual output voltage/current is adjustable to 12 bit resolution by the MTS-1710’s internal control circuitry.
After the user-defined waveform is downloaded and enabled, the anti-alias filter should be set
appropriately using the RCR command to ensure accurate reproduction. The rate should be set to twice the
highest frequency component of the waveform.
The programmable waveform feature may be used to perform testing using a waveform containing
multiple harmonics.
6.2.14.3 EXAMPLE - 8 BIT DATA.
The following is an example usage of the programmable waveform commands which redefine the sine
wave output to a triangular wave.
To set up the programmable waveform, the following commands should be used:
REM
<- remote control mode
PWC2
<- reset to start of waveform data table
PWD1
<- first data point, -Max output at 0 degrees
!1
<- second data point (use repeat last command feature)
!2
<- data point at 1 degree
!3
<- data point at 1.5 degrees
2
2
2
2
2
2
2
2
