General Information; Power Amp - HP 8447D Operation And Service Manual

Model 8447D/E/F
Page 1
1. GENERAL INFORMATION
2. The HP Models 8447D, 8447E and 8447F are
general purpose, wideband amplifiers. Each instru¬
ment consists of a power supply and one or two
thin film, hybrid, integrated circuit amplifiers. The
thin film amplifiers are hermetically sealed and
feature low noise, low distortion, flat frequency
response, and long term stability and reliability.
3. The HP Model 8447D Amplifier is a pre¬
amplifier that provides 26 dB of gain to signals
from 100 kHz to 1.3 GHz. It can be used to
increase the sensitivity of any lab, shop or field
device operating within its frequency range.
4. The HP Model 8447E Amplifier is a power
amplifier that provides 22 dB of gain to signals
from 100 kHz to 1.3 GHz. It can be used to
increase the output power of signal generators,
-sweepers and similar devices operating within its
frequency range.
5. The HP Model 8447F Amplifier contains a
preamplifier and a power amplifier — the same
thin film amplifiers used in the HP 8447D and
HP 8447E. The input and output ports of both
amplifiers are available on the front panel; they
can be used separately or cascaded to provide
48 dB of gain.
Table 1. Specifications
8447D
PRE AMP
844 7E
POWER AMP
844 7F
PRE AMP
POWER AMP
Frequency Range
0.1 to 1300 MHz 0.1 to 1300 MHz 0.1 to 1300 MHz
0.1 to 1300 MHz
Typical 3 dB Bandwidth
.05 to 1400 MHz .05 to 1400 MHz
.05 to 1400 MHz .05 to 1400 MHz
Mean Gain (20° - 30°C) 26 dB Minimum
22 dB ±1.5 dB
26 dB Minimum 22 dB ±1.5 dB
Gain Flatness Across
Full Frequency Range
±1.5 dB ±1.5 dB ±1.5 dB
-
*
---t -
± 1.5 dB
Noise Figure < 8.5 dB
<11 dB
(Typical)
< 8.5 dB
—
:
—
: -
<11 dB
(Typical)
Output Power for 1 dB
Gain Compression
>+7 dBm
(Typical)
>+-15 dBm >+7 dBm
(Typical)
>+15 dBm
Harmonic Distortion
-30 dB for
+10 dBm output
—30 dB for
0 dBm output
(Typical)
—30 dB for
+10 dBm output
Typical Output for
< — 60 dB
Harmonic Distortion
-30 dBm
"20 dBm -30 dBm
"20 dBm
VSWR, 1 to 1300 MHz
<2.0 INPUT
<2.2 OUTPUT
< 2.2
< 2.0 INPUT
< 2.2 OUTPUT
<2.2
Impedance 500
50 0
50 0 500
Reverse Isolation
>40 dB
>40 dB >40 dB
>40 dB
Maximum DC Voltage Input
+ 10 V ±10 V
± 10 V
±10 V
Typical Risetime
400 psec
420 psec 400 psec 420 psec
Typical Group Delay
1.1 nsec*
1.5 nsec** 1.1 nsec*
1.5 nsec**