Freq Resp Above 3.6 GHz Full Bypass Path Performance Test

UXA N9041B models will also run a separate test on Input 2 called Freq Resp 3.6 GHz to 50 GHz Full Bypass Input 2.

This test applies to the following models:

PXA — N9030B with frequency options > 503, and options MPB, LNP, and FBP
UXA — N9040B with options MPB, LNP, and FBP
UXA — N9041B with options MPB, LNP, and FBP

Frequency response (aka. Flatness) is defined as the amplitude deviation from the reference amplitude at 50 MHz. The complete analyzer frequency response is measured with several tests.

The model and options of the DUT will determine which tests are run from the list below.

Freq Resp 300 kHz to 3.6 GHz Preamp Off
Freq Resp 300 kHz to 3.6 GHz Preamp On
Freq Resp 300 kHz to 3.6 GHz AC Coupled
Freq Resp 300 kHz to 3.6 GHz Option EA3
Freq Resp 50 MHz to 3.6 GHz Preamp Off Input 2
Freq Resp 50 MHz to 3.6 GHz Preamp On Input 2
Freq Resp Above 3.6 GHz Preamp Off
Freq Resp Above 3.6 GHz Preamp On
Freq Resp Above 3.6 GHz Full Bypass Path
Freq Resp 3.6 GHz to 50 GHz Preamp Off Input 2
Freq Resp 3.6 GHz to 50 GHz Preamp On Input 2
Freq Resp Unpreselected Preamp On
Freq Resp Above 3.6 GHz Full Bypass Path
Freq Resp 3.6 GHz to 50 GHz Full Bypass Input 2
Freq Resp Below 300 kHz

This test determines the relative frequency response over the frequency range from 3.6 GHz to 50 GHz for the full bypass path. Flatness is not specified in Full Bypass path. The purpose of this test is to verify if appropriate flatness corrections are in the DUT.

A “buried power sensor” technique is used to characterize the tracking error of a power splitter in order to avoid the relatively large specified tracking error. This technique reduces the measurement uncertainty to verify the frequency-response specification for the 3.6 GHz to 50 GHz range. The buried sensor calibration is valid for four hours.

If the test fails, the Frequency Response Above 3.6 GHz Full Bypass Path adjustment should be run.

Click here for troubleshooting.

Required Test Equipment

Test Equipment	Recommended Model Number
Microwave Signal Generator #1	PSG Models (see equipment list)
Power Meter	N1914B
Microwave Power Sensor, Low Power 2 required Options ≤ 526	8485D
Microwave Power Splitter Options ≤ 526	11667B
Millimeter Power Sensor, Low Power 2 required Options > 526	8487D
Millimeter Power Splitter Options > 526	11667C
30 dB Fixed Attenuator	11708A
BNC Cable	8120-1840
Coaxial Cable, 2.4 mm	8120-6164
Coaxial Cable, 3.5 mm	11500E
Type-N (m) to 3.5 mm (m) adapter	1250-1743
3.5 mm (f) to 3.5 mm (f) adapter (for 3.5 mm source)	83059B
2.4 mm (f) to 3.5 mm (f) adapter (for 2.4 mm source)	11901B
3.5 mm (f) to Type-N (m) (8485D adapter)	08485-60005
2.4 mm (f) to Type-N (m) (8487D adapter)	08487-60001

Connection Setups

In the following setups, cables are designated as solid lines and direct connections are designated as dashed lines.

Freq Resp Above 3.6 GHz Full Bypass Path Performance Test

This test applies to the following models:

Required Test Equipment

Connection Setups

Power Meter Calibration

Splitter Characterization

Freq Resp Above 3.6 GHz Full Bypass Path Test Setup

Freq Resp 3.6 GHz to 50 GHz Full Bypass Input 2 Test Setup
N9041B only

Freq Resp Above 3.6 GHz Full Bypass Path Performance Test

This test applies to the following models:

Required Test Equipment

Connection Setups

Power Meter Calibration

Splitter Characterization

Freq Resp Above 3.6 GHz Full Bypass Path Test Setup

Freq Resp 3.6 GHz to 50 GHz Full Bypass Input 2 Test SetupN9041B only

Freq Resp 3.6 GHz to 50 GHz Full Bypass Input 2 Test Setup
N9041B only