TM 11-6625-2781-14&P-2
Section IV
SECTION IV
PERFORMANCE TESTS
Paragraph
Test Description
4-1. INTRODUCTION
Input Impedance
Scan Width Accuracy
4-2. This section contains performance tests for the
Tuning Dial Accuracy
8553B Spectrum Analyzer RF Section. A display
Frequency Response
section and IF section are required for performance
Average Noise Level
tests. Tests for performance of the display section and
Spurious Responses
IF section are contained in separate manuals and should
Residual Responses
be performed prior to checking the RF section. Perform
Noise Sidebands
tests in this section in procedural order with the test
Local Oscillator Stability and
equipment called for, or with its equivalent.
Residual Frequency Modulation
4-3. Specifications of test equipment and accessories
4-10. Each test is arranged so that the specification is
required to performance-test the RF section are given in
written as it appears in the Table of Specifications in
equipment, including those required for alignment,
instructions or problem areas is included. Each test that
adjustment, and service, are given in Tables 1-3 and 1-
requires test equipment has a test setup drawing and a
list of required equipment. Step 1 of each procedure
gives control settings required for that particular test.
4-4. Front panel checks for routine inspection are given
in Table 4-2.
Procedures for verifying that the
4-11. Required specifications for test equipment are
instrument meets specifications are given in Paragraphs
detailed in Table 4-1. If substitute test equipment is to
be used, it must meet the specifications listed in order to
data spaces for recording test results.
performance-test the analyzer.
4-5. FRONT PANEL CHECKS
4-12. FRONT PANEL CHECK PROCEDURE
4-6. Before proceeding to the performance tests, the
4-13. Preset Adjustments
instrument must be adjusted and all controls set as
specified in the preset adjustment instructions in
4-14. Apply power to the analyzer and while the
with the checks. The instrument should perform as
instrument is warming up, make the following control
called out in the procedure before going on to the
settings:
performance tests (Paragraphs 4-23 through 4-31).
RANGE MHz . ................................ .................. 0-110
FREQUENCY ................................ ................ 40 MHz
4-7. PERFORMANCE TESTS
FINE TUNE ................................ ................... Centered
BANDWIDTH ................................ ................ .300 kHz
SCAN WIDTH ................................ .......... .0-100 MHz
4-8. The performance tests given in this manual are
SCAN WIDTH PER DIVISION ...................... .10 MHz
suitable for incoming inspection, troubleshooting, or
INPUT ATTENUATION ................................ ..... .10 dB
preventive maintenance. During any performance test ,
TUNING STABILIZER ................................ .............On
all shields and connecting hardware must be in place
BASE LINE CLIPPER ................................ ........ . ccw
and the RF section and IF section must be installed in
SCAN TIME PER DIVISION .......... 5 MILLISECONDS
the display section.
LOG REF LEVEL ................................ ......... .-10 dBm
LOG REF LEVEL Vernier ................................ ..... ccw
The tests are designed to verify published instrument
LOG/LINEAR ................................ ...................... LOG
specifications. Perform the tests in the order ,given,
VIDEO FILTER ................................ ................ 10 kHz
and record data on test card (Table 4-3) and/or in the
SCAN MODE . ................................ .................... .INT
data spaces provided in each test.
SCAN TRIGGER . ................................ ........... AUTO
4-9. The tests are arranged in the following order:
4-1
