46 N9069C Noise Figure Measurement Guide
Making Noise Figure Measurements
Using the U7227-Series USB Preamplifiers in Noise Figure Measurements
Examples for Using the Guide to Find the Test System Configuration
This section gives an example of using the
“Rough Guide for the Noise Figure
Test System Configuration” on page 42
to find a proper test system
configuration
DUT with Frequency Ranges below 3.6 GHz
The DUT characteristic is as below:
DUT NF:
5 dB
DUT gain:
30 dB
Frequency range: 1 to 2 GHz
The DUT bandwidth is:
Hz
The bandwidth adjust factor is:
dB
Table 2-3
Noise Figure and Gain Specification of the U7227-Series
USB Preamplifier
a
a. Specifications are tested and measured on an operating temperature of 23 °C.
Specification
U7227A
U7227C
U7227F
Frequency
10 MHz to 4 GHz
100 MHz to 26.5 GHz
2 to 50 GHz
Gain (dB)
b
b. "F" signifies frequency in GHz.
> 16 (10 to 100 MHz)
> 0.5 F + 17 (100 MHz to 4 GHz)
> 0.26F +16.1
(100 MHz to 26.5 GHz)
> 0.23F + 16.5
(2 to 50 GHz)
Noise Figure
< 5.5 dB (10 to 100 MHz)
< 5 dB (10 MHz to 4 GHz)
< 6 dB (100 MHz to 4 GHz)
< 5 dB (4 to 6 GHz)
< 4 dB (6 to 18 GHz)
< 5 dB (18 to 26.5 GHz)
< 10 dB (2 to 4 GHz)
< 8 dB (4 to 40 GHz)
< 9 dB (40 to 44 GHz)
< 10 dB (44 to 50 GHz)
Table 2-4
Noise Figure and Gain Specification of the NFA X-Series
Noise Figure Analyzer
Spec
(nominal)
NFA X-Series Noise Figure Analyzer
Gain (dB)
(.Max)
20 dB (100 kHz to 3.6 GHz)
35 dB (3.6 to 26.5 GHz)
40 dB (26.5 to 40 GHz)
Noise Figure
13 to 14.5 dB (100 kHz to 3.6 GHz)
9 dB (3.6 to 8.4 GHz)
10 dB (11 to 18 GHz)
(DANL+176.24 dB) (>13.6 GHz)
DUT_BW
1 10
9
×
=
AF
10
=
3.59 10
9
×
DUT_BW
(
)
⁄
(
)
log
×
5.55
=
Summary of Contents for CXA N9000B
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Page 8: ...8 Contents...
