Service manual

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Service Related Menus
DIAGNOSTIC TEST Menu
7. Service Related Menus
5: ADJUST DATA
Verifies that all correction constants which compensate for the hardware performance of
the analyzer are stored in the EEPROM on A1 CPU.
6: BOARD ID
Checks the board IDs, A2, A3, A4, A5, A6, A7, A8, and A9 board.
7: A8 A/D CONVERTER
Verifies the A/D converter in the A8 Vector Ratio Detector. This test measures the
following frequency bus nodes and DC bus nodes. It then checks that each measured value
is within limits.
• A/D Clock frequency bus
• A/D Sequencer frequency bus
• 2nd LO frequency bus
• 0 V input DC bus
• 1.2 V input DC bus
8: A3 DC POWER SOURCE
Verifies A3 power regulator output voltages, +5 V, -12 V, +12 V. This test measures the
regulator output violates at DC bus nodes. It checks that each measured value is within
limits.
9: A4 DC POWER SOURCE
Verifies A4 power regulator output voltages, Float, LFOUT, HFOUT. This test measures
the regulator output voltages at DC bus nodes. It checks that each measured value is within
limits.
10: A7 DC POWER SOURCE
Verifies A7 power regulator output voltages, 5VRF, 5VN, -8 V, -12 V, +12 V. This test
measures the regulator output voltages at DC bus nodes. It checks that each measured
value is within limits.
11: A8 DC POWER SOURCE
Verifies A8 power regulator output voltages, -5 V, +5 V, -12 V, +12 V. This test measures
the regulator output voltages at DC bus nodes. It checks that each measured value is within
limits.
12: A6 IF FREQUENCY
Verifies IF signals (230kHz/250kHz) in the A6. This test measures the frequencies at a
frequency bus node. It checks that each measured value is within limits.
13: A7 IREF D/A
Verifies the D/A converter in the A7. This test measures the VCXO tuning voltage at a DC
bus node. It checks that the measured value is within limits.
14: A7 OSCILLATION
Verifies the oscillator circuit in the A7. This test measures the PLL signal (230kHz)and IF