GW Instek GDM-8245 - Page 4

GDM-8245 Service Manual
4
Key Matrix Checks .................................................................... 43
Digital Circuitry Checks ............................................................ 43
Calibration ....................................................... 49
Preparation ............................................................................ 50
List of Equipment ................................................................... 51
Component Position (Servicing)................................................ 52
Entering the Calibration mode ................................................. 53
Voltage Verification ................................................................ 54
LED Verification ...................................................................... 55
Power Supply Current Verification ............................................ 55
ACV, ACA, DCA, Ω Short Calibration......................................... 56
Frequency Response Calibration .............................................. 56
Frequency Response Adjustment .............................................. 58
Capacitance Calibration (Open) ................................................ 60
Resistance Calibration ............................................................. 60
DCV Calibration ...................................................................... 61
Diode Calibration .................................................................... 63
DCA Calibration ...................................................................... 64
ACA Calibration ...................................................................... 65
Capacitance Calibration ........................................................... 66
Exit Calibration Mode .............................................................. 67
Verification ...................................................... 68
Resistance Verification (Short) ................................................. 69
Resistance Verification ............................................................ 69
Diode Verification ................................................................... 70
Capacitance Verification (Open) ............................................... 70
Capacitance Verification .......................................................... 71
DCA Verification (Short) .......................................................... 71
DCA Verification ..................................................................... 72
ACA Verification ..................................................................... 73
ACV Verification (Short) ........................................................... 74
ACV Verification (Part 1) .......................................................... 74
AC+DC Verification ................................................................. 75
ACV Verification (Part 2) .......................................................... 75
DCV Verification (Short) .......................................................... 76
DCV Verification (Part 1) .......................................................... 76
DCV Verification (dBm) ............................................................ 77
DCV Verification (Part 2) .......................................................... 77