Maintenance; Introduction; Recommended Test Equipment; Performance Tests - HP 3580A Operating And Service Manual

Model 3580A Section V
SECTION V
MAINTENANCE
5-1. INTRODUCTION.
5-2. This section contains Performance Tests (Paragraph
5-5) and Adjustment Procedures (Paragraph 548) for the
Model 3580A Spectrum Analyzer. Troubleshooting infor-
mation is presented in Section VII, along with the
Schematic Diagrams.
5-3. RECOMMENDED TEST EQUIPMENT.
54. The test equipment that is recommended for maintain·
ing the Model 3580A is listed in Table 5-1. The equipment
is designated as to its use for Performance Tests, Adjust-
ments or Troubleshooting.
5-5. PERFORMANCE TESTS.
5-6. The following Performance Tests are procedures that
can be used to verify that the 3580A is operating properly
and meets the specifications listed in Table 1-1. These
procedures can be used for incoming quality control
inspection, to check specifications after a repair or for
routine maintenance. Where possible, the Performance
Tests call out the proper adjustment in the Adjustment
Procedures. Since adjustments interact, it is important to
follow the procedures carefully.
a. FREQUENCY TESTS (Paragraph 5-9).
b. SWEEP TESTS (PARAGRAPH 5·13).
c. AMPLITUDE TESTS (Paragraph 5-18).
d. BANDWIDTH TESTS (Paragraph 5-28).
e. DYNAMIC RANGE TESTS (NOISE TESTS)(Para-
graph 5-30).
f. IF FEEDTHRU and ZERO BEAT RESPONSE
TESTS (Paragraph 5-36).
g. INPUT IMPEDANCE TESTS (Paragraph 5-38).
h. OUTPUT TESTS (Paragraph 540).
i. BALANCED INPUT TESTS (Option 002 only) (Para-
graph 544).
5-7. Test Card.
5-8. A Performance Test Card is provided at the end of this
section for your convenience in recording the performance
of the Model 3580A during Performance Tests. This card
can be removed from the manual and used as a permanent
record of the incoming inspection or of a routine
perfor~
mance test. The Performance Test Card may be repro-
duced without written permission from Hewlett-Packard.
NOTE
Always allow one hour continuous warm-up
before attempting any tests.
5-9. Frequency Tests.
5-10. These tests verify part of the Frequency Character-
istic Specifications listed in Table 1-1. If, for any reason,
the instrument will not pass these tests, perform the Sweep
Alignment and Dial Calibration (Paragraph 5-63) of the
Adjustment Procedures.
5-11. Range and Frequency Dial Accuracy Test.
a. Position the following front panel controls:
ADAPTIVE SWEEP ................. OFF
DISPLAY ........ All pushbuttons released
AMPLITUDE MODE ...... LOG 10 dBv/DIV
AMPLITUDE REF LEVEL ....... NORMAL
dBv/LIN - dBm 600 .Q ............ dBv/LIN
INPUT SENSITIVITY ............... CAL
VERNIER (Amplitude) ............ CAL
(Fully CW)
FREQUENCY ................. 00.0 kHz
START-CTR ................... START
RESOLUTION BANDWIDTH . . . . . . . 30
Hz
DISPLAY SMOOTHING ........... MIN
FREQ. SPAN/DIV ................. 0 Hz
SWEEP TIME/DIV ............. 0.2 SEC
SWEEP MODE ..................... REP
Option 002: Set dBm 900 .Q/LIN - dBm 600 .Q
switch to dBm 900 .Q; set INPUT MODE switch
to UNBAL.
b. Adjust the front panel ZERO CAL control for a
maximum display indication. Readjust the FREQUENCY
control for 10, 20, 30, 40 and 50 kHz. A peak response
should occur for each of these settings(± .1 kHz) to verify
the Range Specifications and Frequency Dial Accuracy
Specifications (20"' C to 30"' C) given in Table 1-1.
NOTE
As the frequency of the peak response is
approached, pull out the knob for easier tuning.
5-1