Stanford Research Systems SR620 - Page 5

Table of Contents iii
SR620 Universal Time Interval Counter
Timebase 79
Front-End Inputs 79
Trigger Multiplexers 80
Frequency Gates 80
Event Gating 81
Counting Channels 81
Fast Time Interval Logic 82
Time Interval Arming 82
Time Integrators 83
Analog to Digital Converter 83
Autolevel Circuits 83
Digital to Analog Converter 84
Unregulated Power Supplies 84
Power Supply Regulators 84
Power Supply Bypass 85
Front Panel Display PCB 85
Component Parts List 87
Schematic Circuit Diagrams Sheet No.
Front/Rear Panel Summary
Counter Visual Index
Microprocessor System 1/16
GPIB/RS232/Printer Interfaces 2/16
Scope Graphics Controller 3/16
I/O Ports and LED Drivers 4/16
Analog and ECL I/O 5/16
Slow Counters and REF OUT 6/16
Fast Clocks and Timebase 7/16
Front-End Input Comparators 8/16
ECL Mpx/Freq Gating/Counters 9/16
Fast Time Interval Logic 10/16
Time Interpolators 11/16
A/D, D/A and Threshold pots 12/16
Unregulated Power Supplies 13/16
Power Supply Regulators 14/16
Spares and Decoupling 15/16
Front Panel Display PCB 16/16
Component Placement on PCB