AVTECH ELECTROSYSTEMS AVRQ-4-B, Instructions Manual

Page: 4 / 75

GATING MODES...................................................................................................................32
DUT INSTALLATION......................................................................................................33
SOCKET PINOUT.................................................................................................................33
STANDARD DAUGHTERBOARD PINOUT..........................................................................34
STANDARD DAUGHTERBOARD COMPONENTS..............................................................35
SO-8 DAUGHTERBOARD (PCB 314A)................................................................................37
CUSTOM DAUGHTERBOARDS...........................................................................................37
DIFFERENTIAL PROBING...................................................................................................38
INSTALLING THE DAUGHTERBOARDS.............................................................................38
CUSTOMER-SPECIFIC -WDIP16A DAUGHTERBOARD....................................................39
BASIC TEST ARRANGEMENTS...................................................................................42
INTER-CHANNEL INTERFERENCE.....................................................................................43
TYPICAL WAVEFORMS FOR STANDARD DAUGHTERBOARDS.............................45
BASIC THEORY....................................................................................................................45
TYPICAL POSITIVE RESULTS, WITH NO DUT INSTALLED.............................................47
TYPICAL NEGATIVE RESULTS, WITH NO DUT INSTALLED............................................48
HCPL-7721 RESULTS..........................................................................................................49
INDUCTIVE SPIKES AND PROBE SATURATION.......................................................52
DC CORRECTNESS ISSUES.........................................................................................52
VERIFICATION AND TROUBLESHOOTING................................................................53
SAFETY CONCERNS.....................................................................................................55
TURN OUTPUT OFF BEFORE ACCESSING DUT...............................................................55
AUTOMATIC TIMEOUT........................................................................................................55
OVERLOAD INDICATOR......................................................................................................55
OPERATIONAL CHECK.................................................................................................56
PROTECTING YOUR INSTRUMENT.............................................................................59
USE HIGH-VOLTAGE CABLES, CONNECTORS, AND PROBES......................................59
SHORT-CIRCUIT PROTECTION..........................................................................................59
MECHANICAL INFORMATION......................................................................................60
TOP COVER REMOVAL.......................................................................................................60
RACK MOUNTING................................................................................................................60
MAINTENANCE..............................................................................................................61
REGULAR MAINTENANCE..................................................................................................61
CLEANING............................................................................................................................ 61
4