Frequency Response (Flatness) - Keysight N8973B Service Manual

Functional Tests

Frequency Response (Flatness)

Frequency Response (Flatness)
Test Limits
The frequency response test measures the signal analyzer's amplitude error as
a function of the tuned frequency. Measurements are made ranging from 50
MHz to the maximum frequency range of your analyzer. The signal source
amplitude is measured with a power meter to eliminate error due to source
flatness. The measured value is normalized to 50 MHz.
Item
Adapter, Type N (m) to
a
3.5 mm (m)
Adapter,
3.5 mm (f) to 3.5 mm (f)
a
Cable, 3.5 mm, 1 meter
(N8973B, 74B, 75B)
b
Cable, 2.4 mm, 1 meter
(N8976B)
Cables, BNC 120 cm
Power Meter
Power Sensor
b
Power Sensor
Keysight NFA Series Noise Figure Analyzers Service Guide
Frequency Range
9 kHz to 3.6 GHz
> 3.6 GHz to 7.0 GHz
> 7.0 GHz to 13.6 GHz
> 13.6 GHz to 26.5 GHz
> 26.5 GHz to 34.5 GHz
> 34.5 GHz to 44 GHz
Critical Specifications
Frequency: 10 MHz to 18 GHz
VSWR: < 1.1:1
Frequency: 10 MHz to 26.5 GHz
VSWR: < 1.1:1
a
Frequency: 10 MHz to 26.5 GHz
VSWR: < 1.4:1
Frequency: 10 MHz to 50 GHz
VSWR: < 1.55:1
Frequency: 10 MHz
Compatible with power sensor
Frequency Range: 50 MHz to 26.5 GHz
Frequency Range: 50 MHz to 44 GHz
Limit Relative to 50 MHz
±1.7 dB
±3.0 dB
±3.5 dB
±4.2 dB
±3.5 dB
±4.2 dB
(for this test)
Recommended
Keysight Model
1250-1743
83059B
11500E
8120-6164
10503A
E4418B
8485A
8487A
505