Section VII
TM 11-6625-2781-14&P-2
SECTION VII
MANUAL CHANGES
7-4. 8553B OPTION H01/H02
7-1. INTRODUCTION
7-5. The 75-ohm RF section differs from the 50-ohm
7-2. As changes are made to the 8553B, newer
instruments may have serial number prefixes not listed
added to change the input impedance to 75 ohms.
in this manual. The manuals for those instruments will
These circuit changes are shown here with partial
be supplied with an additional "Manual Changes" insert
schematics that can be copied and added directly to
containing the required information; contact your local
Hewlett-Packard Sales and Serv ice Office if this sheet is
missing.
7-3. The information in this section covers the manual
changes necessary to:
specifications (see Table 1-1) and the performance
a. Convert this manual so that it directly applies to
tests. Paragraph 7-8 shows the changes to paragraph
the 8553B Option H01/H02 75-ohm RF Section (see
b. Back-date this manual so that it directly applies
to 8553B RF Sections with serial numbers 0982A00975
and below (see paragraph 7-12).
PERFORMANCE TESTS
7-7. PERFORMANCE TEST PROCEDURE CHANGES FOR OPTION H01/H02
7-8. Input Impedance
SPECIFICATION: Change to Input Impedance: 75-ohm nominal. Reflection Coefficient ≤ 0.13 (≤ .30 SWR).
1
Step 2. Change impedance limits to:
57.7
97.5 ohms
Step 6. Change voltmeter reading limits to:
16
19.8 mV
Step 8. Change to read: Repeat steps 1-7 with INPUT ATTENUATOR set to 20 dB, 10 dB and finally, 0 dB.
7-9. Average Noise Level
SPECIFICATION:
IF Bandwidth
Avg. Noise Level
Frequency Range
(kHz)
(dBm)
(MHz)
1
-110
1 - 110
10
-100
1 - 110
100
- 90
1 - 110
DESCRIPTION:
Sensitiv ity is checked by measuring the average noise power level of the analyzer with the instrument vertically
calibrated. The test is made using IF bandwidths listed in the specification.
7-1
