HP 8481A - Product Overview; General Information and Manual Scope; Instruments Covered by Serial Number; Power Sensor Description and Range

08481-90049
HP 8481A/82A/83A
This Operating and Service Manual contains information about initial
inspection, performance tests, adjustments, operation, troubleshooting
and repair of the HP 8481A, 8482A, and 8483A Power Sensors.
On the title page of this manual is a “Microfiche” part number. This
number can be used to order a 4 x 6-inch microfilm
transparency of the
manual.
General Information
This instrument has a two-part serial number. The fi rst
four digits and
the letter comprise the serial number prefix. The last
fi ve digits form
a sequential suffix which is unique to teach instrument. The contents
of this manual apply directly to instruments having the serial number
prefix listed under “Serial Numbers” on the title page.
An instrument manufactured after the printing of this manual may have
a serial prefix that is not listed on the title page. This unlisted serial
prefix indicates that the manual for this instrument
is supplied with a
yellow Manual Changes supplement that documents the differences.
In addition to change information, the supplement may contain
information for correcting errors in the manual. The supplement is
keyed to the manual print date and part number, both
of which appear
on the title page.
For information concerning a serial number prefix not listed on the
title page or in the Manual Changes supplement, contact your nearest
Hewlett- Packard office.
instruments Covered by
Manual
The Power Sensors are used for measuring the average power supplied
by an RF source. In use, the Power Sensor is connted to the RF source
and to a compatible power meter. (Suitable meters are the HP 435B,
436A, 437B or 438A Power Meter.) The HP 8481A and 8482A Power
Sensors place a 5011 load on the RF source (HP 8483A has a 75fi load).
The power meter indicates the power dissipated in this
load in //W (or
mW) and dBm. The HP 436A Power Meter can also provide readings,
in dB, relative to a previous RF input to the Power Sensor.
The Power Sensors measure power levels from —30 dBm
to -1-20 dBm (1
fiW to 100 mW), at frequencies from 10 MHz to 18 GHz (HP 8481A),
or 100 kHz to 4.2 GHz (HP 8482A), or 100 kHz to 2 GHz
(HP 8483A).
The physical configuration of all sensors is the same. However, because
of the different frequency ranges covered, there are
some changes in part
numbers and component values.
CAL FACTOR data is provided on a label attached to the Power
Sensor’s cover. Maximum uncertainties of the CAL FACTOR data are
listed in table 1.
Specifications for the Power Sensor are provided in table 2.
Description
1