Keithley 4200A-SCS

Model 4200A
-SCS Parameter Analyzer Reference Manual Section 13:
LPT library function reference
4200A-901-01 Rev. C / February 2017 13-151
Also see
pulse_fall (on page 13-142)
pulse_range (on page 13-149)
pulse_source_timing (on page 13-116)
pulse_trig (on page 13-152)
pulse_ssrc
This command controls the high-endurance output relay (HEOR) for each output channel of the PGU.
Usage
int pulse_ssrc(int instr_id, long chan, long state, long ctrl);
instr_id
The instrument identification code of the pulse card, such as VPU1 or VPU2
chan
Channel number of the pulse card: 1 or 2
state
Open: 0
Close:
1
(default)
ctrl
How the HEOR will be controlled:
• Auto (the Segment Arb pulse mode controls the HEOR): 0 (default)
• Manual (state parameter opens or closes relay): 1
•
Trigger out driven (relay state follows the trigger output): 2
Pulse modes
Standard, Full Arb, Segment Arb
Details
The high-endurance output relay (HEOR) is a solid-state relay (SSR) on each channel of the pulse
card. Note that this setting is independent of the output relay (see pulse_output). A simplified
schematic showing the relays is shown here.
Figure 510: Simplified schematic of a 4220-PGU channel