Pacific UPC-12, Operation Manual

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SECTION 2 SPECIFICATIONS
10
2.1.4 WAVEFORM CONTROL SPECIFICATIONS
The standard hardware configuration supports 16 waveforms with an option to store 128. There are 16
pre-stored waveforms in the UPC EPROM which are available to initialize the 16 waveforms stored in
RAM. Each output phase is generated by one of the 16 waveforms stored in RAM.
Waveform 1 is always a Sine wave and cannot be changed. Waveforms 2-16 are editable. Waveforms
17-32 are pre-stored in the CPU EPROM. Waveforms 2-16 may be individually edited, or loaded from
the pre-stored waveforms (17-32) by copying. This gives the user the ability to create almost any
waveform with the UPC, such as sub-cycle transients. See section 4.5.2.2 for an example of creating a
cycle-based transient that performs waveform substitution for 1 cycle.
Each output phase may be independently generated from a separate waveform by creating a stored
program and specifying the waveform number for each phase within that program.
If the ERASE ALL RAM AND RESET CPU function is selected, waveforms 17 - 32 are subsequently
copied (as defaults) to waveforms 1-16 respectively as shown in the following table.
EDITABLE
WAVEFORM # EPROM
WAVEFORM #
DESCRIPTION
1 17 SINE WAVE
2 18 TRIANGLE - 12.7% THD
3 19 SQUARE - 38.6% THD
4 20 PULSE (30º WIDTH) - 153% Avg. THD
5 21 FLAT TOP - 5% THD (PK:RMS=1.309)
6 22 FLAT TOP - 6% THD (PK:RMS=1.295)
7 23 FLAT TOP - 7% THD (PK:RMS=1.282)
8 24 FLAT TOP - 8% THD (PK:RMS=1.269)
9 25 FLAT TOP - 9% THD (PK:RMS=1.257)
10 26 FLAT TOP - 10% THD (PK:RMS=1.246)
11 27 FLAT TOP - 11% THD (PK:RMS=1.235)
12 28 FLAT TOP - 12% THD (PK:RMS=1.225)
13 29 *IEC 77A CLASS 1 - 12.6% THD
14 30 *IEC 77A CLASS 2 - 14.4% THD
15 31 SINE WAVE
16 32 SINE WAVE
*
NOTE : IEC 77A (Secretariat) 99 Draft (Sept. 1993)
NOTE : THD is measured as RMS THD with a Distortion Analyzer unless noted above.
For other waveforms, Waveform Edit (4.6.2.1) allows modification of existing waveforms, and Waveform
Synthesis (Harmonic Analysis and Synthesis, 4.6.2.3) allows creation of waveforms by defining harmonic
content.