HP 8447A - General Information

Model 8447A
General Information
SECTION I
GENERAL INFORMATION
1-1. INTRODUCTION.
1-2. This manual contains all information re¬
quired to install, operate, test, adjust, and service
the Hewlett-Packard Model 8447A Amplifier (see
Figure 1-1). This section contains instrument iden¬
tification, description, options, accessories, specifi¬
cations, and other basic information.
1-3. The various sections in this manual provide
information as follows;
SECTION II, INSTALLATION, provides
information relative to incoming inspec¬
tion, power requirements, mounting, pack¬
ing and shipping, etc.
SECTION III, OPERATION, provides in¬
formation relative to operating the instru¬
ment.
SECTION IV, PERFORMANCE TEST,
provides information required to verify
that the instrument is performing in accor¬
dance with published specifications.
SECTION V, ADJUSTMENTS, provides in¬
formation required to properly adjust and
align the instrument after repairs are made.
SECTION VI, PARTS LIST, provides or¬
dering information for all replaceable parts
and assemblies.
SECTION VII, MANUAL CHANGES, nor¬
mally will contain no relavent information
in the original issue of a manual. This sec¬
tion is reserved to provide back dated and
up dated information in manual revision or
reprints.
SECTION VIII, SERVICE, includes infor¬
mation necessary to efficiently service the
instrument.
1-4. INSTRUMENT COVERED BY MANUAL.
1-5. Hewlett-Packard instruments carry an 8-di-
git serial number prefix (see Figure 1-3) on the
back of the panel. When the serial number prefix
on the instrument serial number plate of your in¬
strument is the same as one of the serial prefix
numbers on the inside title page of this manual, the
manual applies directly to the instrument. When
the instrument serial number prefix is not listed on
the inside title page, manual changes sheets and
manual updating information is provided. Later ed¬
itions or revisions to the manual contain the re¬
quired change information in Section VII.
1-6. DESCRIPTION.
1-7. HP Model 8447A Amplifier is a general
purpose, low-noise, wideband amplifier (see Figure
1-1). The 8447A provides 20 dB gain to signals in
50 ohm systems from .1 to 400 MHz.
1-8. The Model 8447A amplifier can be used to
make up resistive probe losses or improve sensitivi¬
ty when used as a preamplifier to a spectrum analy¬
zer or oscilloscope.
1-9. OPTIONS.
1-10. The Model 8447A -001 Dual Amplifier (see
Figure 1-2) is a two-amplifier configuration which
can be operated separately. Each amplifier provides
20 dB gain or the amplifiers can be cascaded by a
front panel patch cable to provide a total gain of
40 dB.
Table 1-1. Specifications
Frequency Range: 0.1 to 400 MHz.
Gain: 20dB±0.5dB*.
Gain Flatness: ±0.5 dB.
Noise Figure: <5 dB, 1 to 400 MHz.
Output Level: >+7 dBm at 1-dB compression
point.
Distortion: Harmonics at least 35 dB down at
output levels up to 0 dBm.
Impedance: 50G both ports, |p| <0.26
(VSWR <1.7).
Power Requirements: 115 or 230 Vac ±10%,
50 to 400 Hz, 15 Watts, 27 VA max.
Weight: Net, 3 lbs, 7 oz.(l,56 kg), shipping: 5
lbs, 1 oz. (2,30 kg)
Dimensions: 8-1/2 inches (216 mm) by 5-1/8
inch (130 mm) by 3-3/8 inches (85,8 mm).
* Measured at 10 MHz.
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