7-4. 8553B OPTION H01/H02
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
7-3. The information in this section covers the manual
7-6. The input impedance change also affects the
changes necessary to:
specifications (see Table 1-1) and the performance
a. Convert this manual so that it directly applies to
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
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).
Step 2. Change impedance limits to:
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
Avg. Noise Level
1 - 110
1 - 110
1 - 110
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.