Anritsu 682XXB - Manual (Page 8)

3-16 PULSE MODULATION TEST: RF ON/OFF RATIO 3-45
Test Setup . . . . . . . . . . . . . . . . . . . 3-45
Test Procedure . . . . . . . . . . . . . . . . . 3-45
3-17 PHASE MODULATION TESTS. . . . . . . . . . . 3-48
Test Setup . . . . . . . . . . . . . . . . . . . 3-48
FM Input Sensitivity Procedure. . . . . . . . . 3-48
Chapter 4 - Calibration
4-1 INTRODUCTION . . . . . . . . . . . . . . . . . . . 4-3
4-2 RECOMMENDED TEST EQUIPMENT . . . . . . . 4-3
4-3 TEST RECORDS . . . . . . . . . . . . . . . . . . . 4-3
4-4 CALIBRATION FOLLOWING SUBASSEMBLY
REPLACEMENT. . . . . . . . . . . . . . . . . . . 4-4
4-5 CONNECTOR AND KEY LABEL NOTATION . . . 4-4
4-6 INITIAL SETUP. . . . . . . . . . . . . . . . . . . . 4-7
Interconnection . . . . . . . . . . . . . . . . . 4-7
PC Setup — Windows 3.1 . . . . . . . . . . . . 4-8
PC Setup — Windows 95 . . . . . . . . . . . . 4-10
4-7 PRELIMINARY CALIBRATION . . . . . . . . . . 4-13
Equipment Setup . . . . . . . . . . . . . . . . 4-13
Calibration Steps . . . . . . . . . . . . . . . . 4-14
4-8 SWITCHED FILTER SHAPER CALIBRATION . . 4-17
Equipment Setup . . . . . . . . . . . . . . . . 4-17
Log Amplifier Zero Calibration . . . . . . . . . 4-18
Limiter DAC Adjustment . . . . . . . . . . . . 4-18
Shaper DAC Adjustment . . . . . . . . . . . . 4-19
4-9 RF LEVEL CALIBRATION . . . . . . . . . . . . . 4-22
4-10 ALC SLOPE CALIBRATION . . . . . . . . . . . . 4-23
Equipment Setup . . . . . . . . . . . . . . . . 4-23
ALC Slope DAC Adjustment . . . . . . . . . . 4-24
4-11 ALC BANDWIDTH CALIBRATION . . . . . . . . 4-31
Equipment Setup . . . . . . . . . . . . . . . . 4-31
Bandwidth Calibration . . . . . . . . . . . . . 4-31
iv 682XXB/683XXB MM
Table of Contents (Continued)