Specifications

5-6 ALC ADJUSTMENT PROCEDURE .........................5-8
5-7 BACK-END ATTENUATOR CALIBRATION (OPTION 4X ONLY) ........5-10
5-8 NOISE SOURCE SIGNAL INTERNAL THROUGH PATH
CHARACTERIZATION (OPTION 4X ONLY)....................5-11
Chapter 6 Troubleshooting
6-1 INTRODUCTION ...................................6-3
6-2 SELF TEST ......................................6-3
6-3 TROUBLESHOOTING TOOLS FOR THE CPU MODULE .............6-4
SRAM .......................................6-6
SRAM DISK ....................................6-6
FLASH MEMORY .................................6-6
EXTENDED FLASH MEMORY .........................6-6
DRAM .......................................6-7
GRAPHICS VRAM ................................6-7
GRAPHICS DRAM ................................6-7
DSP SRAM.....................................6-7
6-4 HARDWARE TROUBLESHOOTING.........................6-8
CPU MODULE ..................................6-8
SOURCE MODULE ................................6-9
HET OSCILLATOR VOLTAGE .........................6-11
SOURCE 1 ....................................6-12
SOURCE 2 ....................................6-12
LO.........................................6-12
AUTO LEVEL CONTROL (ALC) ........................6-13
RECEIVER MODULE ..............................6-16
NOISE SOURCE POWER SUPPLY.......................6-21
POWER DISTRIBUTION UNIT.........................6-21
FRONT PANEL ASSEMBLY ..........................6-22
6-5 SOFTWARE PROBLEM ...............................6-23
6-6 MEASUREMENT QUALITY PROBLEM ......................6-23
6-7 NOISE FIGURE MEASUREMENT PROBLEM ..................6-24
6-8 FREQUENCY TRANSLATING GROUP DELAY MEASUREMENT .......6-27
vi MS462XX MM
Table of Contents (Continued)