8
Model 1421
Specifications
Nominal Gain:
8.5 dB
Gain Flatness:
1
±1.5 dB
Max. Power Out:
2
10 dBm
Max. AC Input:
2
10 dBm
Max. DC Input:
10 V
VSWR:
3
1.8:1 input
2.1:1 output
Noise Figure:
4
8 dB
Input Noise:
22 pA/
√
Hz
Impulse Response:
20 ps
Frequency Response:
5
50 MHz–20 GHz
Input Impedance:
50
Ω
Output Impedance:
50
Ω
Power Requirements:
±15 V, <150 mA
(To protect the amplifiers from possible incorrect connections we
recommend the Model 0901.)
1
This is the variation of the gain over the entire frequency bandwidth.
For instance, the 1421 has a gain that varies from 7 dB to 10 dB. In
terms of voltage gain, this is the variation from 2.2 to 3.2.
2
In a 50-
Ω
system, 10 dBm=1.0 V peak.
3
The VSWR is the Voltage Standing-Wave Ratio. It is the ratio between
a maximum and a minimum of a standing wave that occurs because of
the impedance mismatch. A VSWR value of 1 indicates a perfectly
matched system. For a reflection coefficient R,
4
Noise Figure is the amount of excess input noise above -174 dBm in a
1 Hz bandwidth and at 290 K. In a 50-
Ω
system, 8 dB corresponds to an
input noise current of 22 pA/Hz.
5
We offer an option which extends the low frequency cutoff to 14 MHz.
VSWR
1 R
1 R
=
+
−
Содержание 1421
Страница 1: ...Models 1421 and 1422 User s Manual Broadband Amplifiers ...
Страница 2: ...2 Is a registered trademark of New Focus Inc 142101 Rev A ...
Страница 12: ...12 Notes ...
