Keysight N9038A, Service Manual, Page: 677 / 745

696 Keysight N9038A MXE Service Guide
Tests
Frequency Response (Flatness) - Preamp On
Frequency Response (Flatness) - Preamp On
Test Limits
See test limits in the test result Table 22-20 and Table 22-21 .
Overview
The frequency response test measures the EMI receiver’s amplitude error as a
function of the tuned frequency with the internal preamp turned on.
Measurements are made ranging from 50 MHz to the maximum frequency
range of the receiver under test. 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.
This measurement is performed for both RF inputs.
Table 22-19 Frequency Response - Preamp On - Required Equipment
Item
Critical Specifications
(for this test)
Recommended
Keysight Model
Adapter
Type N (m) to 3.5 mm (m)
Frequency: 10 MHz to 18 GHz
VSWR: < 1.1:1 1250-1743
Adapter,
3.5 mm (f) to 3.5 mm (f)
Frequency: 10 MHz to 26.5 GHz
VSWR: < 1.1:1 83059B
Cable, 1 meter
a
3.5 mm (m) to 3.5 mm (m)
Frequency: 10 MHz to 26.5 GHz
VSWR: < 1.4:1 11500E
Cable, 1 meter
b
2.4 mm (m) to 2.4 mm (m)
Frequency: 50 MHz to 44 GHz
VSWR: < 1.55:1 8120-6164
Cable, 120 cm
BNC (m) to BNC (m)
Frequency: 10 MHz 10503A
Power Meter Compatible with power sensor E4418B
Power Sensor Frequency Range: 50 MHz to 26.5 GHz
Amplitude Range:
−
65 dBm to
−
55 dBm
8485D
Power Sensor
b
Frequency Range: 50 MHz to 44 GHz
Amplitude Range:
−
65 dBm to
−
55 dBm
8487D
Power Splitter
a
3.5 mm (f)
Frequency Range: 50 MHz to 26.5 GHz
Tracking between ports: < 0.25 dB
11667B
Power Splitter
b
2.4 mm (f)
Frequency Range: 50 MHz to 44 GHz
Tracking between ports: < 0.4 dB
11667C
Signal Generator Frequency Range: 50 MHz to maximum frequency of
MXE
PSG
a. Required for Option 503, 508, and 526