Agilent Technologies 8753ES, Service Manual

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10-12 Chapter 10
Service Key Menus and Error Messages
Service Key Menus
Adjustment Tests These tests (except as noted) are used in the procedures located in
Chapter 3 , “Adjustments and Correction Constants.”
Table 10-8 Adjustment Tests
Test
Number
Test Name Description
44 Source Def Writes default correction constants for rudimentary source power accuracy. Use
this test before running test 47, below.
45 Pretune Def Writes default correction constants for rudimentary phase lock pretuning
accuracy. Use this test before running test 48, below.
46 ABUS Cor Measures three fixed voltages on the ABUS, and generates new correction
constants for ABUS amplitude accuracy in both high resolution and low
resolution modes. Use this test before running test 48, below.
47 Source Cor Measures source output power accuracy, flatness, and linearity against an
external power meter via GPIB to generate new correction constants. Run tests
44, 45, 46, and 48 first.
48 Pretune Cor Generates source pretune values for proper phase-locked loop operation. Run
tests 44, 45, and 46 first.
50
Disp 2 Ex
a
a. Not used in the adjustment procedures.
Writes the “secondary test pattern” to the display for adjustments. Press
to exit this routine.
51 IF Step Cor Measures the gain of the IF amplifiers (A and B only) located on the A10 digital
IF, to determine the correction constants for absolute amplitude accuracy. It
provides smooth dynamic accuracy and absolute amplitude accuracy in the
−
30 dBm input power region.
52 ADC Ofs Cor Measures the A10 Digital IF ADC linearity characteristics, using an internal
ramp generator, and stores values for the optimal operating region. During
measurement, IF signals are centered in the optimal region to improve
low-level dynamic accuracy.
53
Sampler Cor
Measures the absolute amplitude response of the R sampler against an external
power meter via GPIB, then compares A and B, (magnitude and phase), against
R. It improves the R input accuracy and A/B/R tracking.
54 Cav Osc Cor Calculates the frequency of the cavity oscillator and the instrument
temperature for effective spur avoidance.
55 Serial Cor Stores the serial number (input by the user in the Display Title menu) in
EEPROM. This routine will not overwrite an existing serial number.
56 Option Cor Stores the option keyword (required for Option 002, 006, 010 or any
combination).
57
Not used
58 Init
EEPROM This test initializes certain EEPROM addresses to zeros and resets the display
intensity correction constants to the default values. Also, the test will not alter
the serial number and correction constants for Option 002, 006, and 010.
Preset