Fluke 5790B - Page 4

5790B
Service Manual
ii
Filter Assembly (A18) ........................................................................ 2-7
Regulator/Guard Crossing Assembly (A17) ...................................... 2-7
Transfer Assembly (A10) ................................................................... 2-7
A/D Amplifier Assembly (A15) ........................................................... 2-8
DAC Assembly (A16) ......................................................................... 2-10
Wideband Module (A6) ...................................................................... 2-11
3 Calibration Adjustment and Verification ........................................... 3-1
Introduction ............................................................................................ 3-1
Calibration Cycle ............................................................................... 3-1
Calibration Reports ............................................................................ 3-1
Save Calibration Reports ................................................................... 3-2
Calibration Adjustment Security Passcode ........................................ 3-2
Full or Range Calibration Adjustment ................................................ 3-2
Automating Calibration Adjustment and Verification ......................... 3-3
How Calibration Memory is Organized .............................................. 3-3
Calibration ............................................................................................. 3-4
Calibrating (Calibration Adjustment) the Main Input .......................... 3-4
Characterizing the DC Source ........................................................... 3-5
Self-Calibrate a Fluke 752A Divider with a Fluke 8508A as the Null
Detector ............................................................................................. 3-5
DC Voltage Source Characterization Values ..................................... 3-7
DC Calibration Adjustment ............................................................ 3-12
AC Calibration Adjustment ............................................................ 3-18
Calibrate the Wideband AC Option ................................................... 3-27
Characterizing the AC Source ....................................................... 3-29
Calibration Adjustment of Wideband Input Gain at 1 kHz.............. 3-32
Calibration Adjustment of Wideband Input Flatness ...................... 3-33
Calibration Adjustment of AF Option ............................................. 3-35
Calibration Verification .......................................................................... 3-37
Verifying the DC Voltage Performance of the Main Input .................. 3-37
Verifying the Main Input (INPUT 1 or 2) ............................................ 3-39
Verifying AC-DC Difference for Regions I and III
(220 mV through 1000 V Range) ................................................... 3-45
Verifying Absolute AC Error for Region IV
(70 mV through 700 mV Range) .................................................... 3-45
Verifying Absolute AC Error for Region II
(2.2 V through 1000 V Range) ....................................................... 3-49
Verifying Absolute AC Error for Region V
(2.2 mV through 22 mV) ................................................................ 3-51
Verifying the Wideband AC Option .................................................... 3-52
Wideband 1-kHz Gain Verification ................................................. 3-63
Wideband Gain Verification, 10 Hz to 500 kHz ............................. 3-63
Wideband Flatness Verification ..................................................... 3-63
Verification of AF Option ................................................................ 3-64
Update Full Verification Date ................................................................. 3-65
4 Maintenance ......................................................................................... 4-1
Introduction ............................................................................................ 4-1
Clean the Exterior .............................................................................. 4-1
Fuse Replacement ............................................................................ 4-2
Clean the Air Filter ............................................................................. 4-4
Access Procedures ............................................................................... 4-6
Top and Bottom Covers ..................................................................... 4-6