Contents
ii
CG635 Synthesized Clock Generator
STATUS 22
PRBS ON/OFF
24
FREQ/2, FREQx2
24
REL
ș
= 0
24
ș
+ 90°
24
GPIB 24
ADDRS 25
RS-232 25
DATA 25
Factory Default Settings
25
Troubleshooting 26
CG635 Remote Programming
29
Introduction 29
GPIB 29
RS-232 29
Front-Panel Indicators
29
Command Syntax
30
Index of Commands
31
Instrument Control Commands
31
Interface Commands
31
Status Reporting Commands
31
Instrument Control Commands
32
Interface Commands
36
Status Reporting Commands
38
Status Byte Definitions
40
Serial Poll Status Byte
40
Standard Event Status Register
41
Communication Error Status Register
41
Instrument Status Register
41
PLL Lock Status Register
42
Error Codes
43
Performance Evaluation
47
Overview 47
Equipment Required
47
CG635 Self Test
47
Output Level Tests
48
Q/Q
¯ Level Tests
48
CMOS Level Tests
49
Transition Time Measurements
50
Frequency Synthesis Tests
52
Functional Tests
53
Time Modulation Test
55