General Information - HP 8481A Operating And Service Manual

HP 8481A/82A/83A
08481*90049
General Information
instruments Covered by
Manual
Description
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.
This instrument has a two-part serial number. The first four digits and
the.letter comprise the serial number prefix. The last five 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.
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 750 load).
The power meter indicates the power dissipated in this load in ,uW (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 +20 dBm (1
£tW 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 S483A).
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.
1