Keysight N9038A, Service Manual, Page: 671 / 745

690 Keysight N9038A MXE Service Guide
Tests
Frequency Response (Flatness)
Frequency Response (Flatness)
Test Limits
See test limits in the test result Table 22-17 and Table 22-18 .
Overview
The frequency response test measures the EMI receiver’s amplitude error as a
function of the tuned frequency. 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 22-16 Frequency Response - 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: − 25 dBm to 10 dBm
8485A
Power Sensor Frequency Range: 50 MHz to 44 GHz
Amplitude Range: − 30 dBm to 20 dBm
8487A
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 26 GHz PSG
a. Required for Option 503, 508, and 526
b. Required for Option 544 (44 GHz Frequency Range)