New Focus 1421 - Model 1421 Specifications

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
=
+
−