Instruments Covered By Manual - HP 85020 A Operating And Service Manual

General Information Model 85020A/B
CAUTION
The CAUTION sign in this manual calls
attention to an operating procedure or
practice which, if not correctly performed
or adhered to, could damage or destroy the
equipment. Do not proceed beyond a CAUTION
sign until the indicated conditions are
fully understood and met.
1-9. INSTRUMENTS COVERED BY MANUAL
1-10. This instrument has a two-part serial number. The first
four digits and the letter comprise the serial number prefix. "T'he
last five digits form the sequential suffix that is unique to each
instrument. The contents of this manual apply directly to
instruments with a serial number prefix aiven on the title page
under the heading SERIAL NUMBERS.
1-11. An instrument manufactured after the printing of this
manual may have a serial prefix that is not shown on the title
pace. This unlisted serial prefix indicates that the instrument is
different from those documented in this manual. The manual for
such an instrument will be supplied with a yellow Manual Changes
supplement containing information to document the differences.
1-12. In addition to change information, the supplement may
contain information for correcting errors in the manual. To keep
this manual as current and accurate as possible, Hewlett-Packard
recommends that you periodically request the latest Manual Changes
supplement. The supplement for this manual is keyed to the
manual's print date and part number, both of which appear on the
title page. Complimentary copies of the supplement are available
from Hewlett-Packard.
1-13. DESCRIPTION
1-14, The 85020A and 85020B are Directional Bridges designed to
be used in conjunction with the Hewlett-Packard Model 8756A and
8755C
Scalar Network Analyzers for making scalar reflection and
transmission measurements.
A
single zero-biased Schottky diode
detector in the bridge samples the return loss of a device under
test for reflection measurements. Transmission measurements can be
made with the addition of a detector. A power splitter can be used
with the bridge for ratio measurements. A swept RF input siqnal is
supplied by a sweep oscillator or a synthesized sv7eeper.
1-15. The 85020A is a 50-ohm bridae with a frequency range of 10
MHz to 4.3 GHz. Both the input connector and the test port
1-4