Figure A-3 Case Iii Timing Diagram - Keithley 6430 Instruction Manual

A-10 Specifications
Case II: Auto-Zero enabled and measuring two functions
F i g u r e A-2
Trigger
Case II
Latency
timing
diagram
Trigger
Event
Trigger Latency:
Source Configuration:
A/D Conversion:
Firmware Overhead:
Source On Time ≅ Source Configuration + Source Delay + (4 × A/D Conversion) + Firm-
ware Overhead
Example:
Source On Time ≅ 50µsec + 0 + [(4 × 0.06 × 1/60) + 185µsec] + 2.6msec
Case III: Auto-Zero disabled and measuring one function
F i g u r e A-3
Case III timing
diagram
Trigger
Event
Trigger Latency:
Source Configuration:
A/D Conversion:
Firmware Overhead:
Trigger
Source Source
Delay
Configuration Delay
Source
On
225µsec max
50µsec max
[NPLC Setting × (1 / power line frequency)] + 185µsec
2.3msec for Source V
2.65msec for Source I
Source Delay = 0µsec
NPLC Setting = 0.06 PLC
Power Line Frequency = 60Hz
≅ 7.1msec for Source V
≅ 7.45msec for Source I
Trigger Trigger Source
Latency
Delay Configuration
Source
On
225µsec max
50µsec max
[NPLC Setting × (1 / power line frequency)] + 185µsec
300µsec for Source V
640µsec for Source I
A/D A/D
Conversion
Conversion
(voltage signal
(current signal
phase)
phase)
Source On Time
Source
A/D
Delay
Conversion
(current signal
phase)
Source On Time
A/D A/D
Conversion
Conversion
(ref phase) (ref zero phase)
Source
Source
Off
Off