UXA N9041B models will also run a separate test on Input 2.
All X-Series models
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UXA N9041B models will also run a separate test on Input 2. |
This test measures the absolute amplitude of the analyzer at 50 MHz. A synthesized signal source and two precision attenuators are used as the signal source to the analyzer. A power meter is used to measure a reference power level from the signal source. The precision attenuators are switched to provide a series of signal power levels below the reference power.
The combined attenuation of the 10 dB and 1 dB precision attenuators is never set below 5 dB in order to maintain a good match between the signal source and the analyzer-under-test. In addition, a 10 dB fixed attenuator is placed between the DUT and the precision step attenuators to further improve the match. Also, a 6 dB fixed attenuator is placed between the source and the step attenuator to control match.
Varying the signal level at the analyzer input causes various ADC ranges to be enabled. The resolution bandwidth and frequency span on the analyzer are varied, resulting in different pre-filter path and bandwidth switching errors. These errors are all absorbed by the DUT in giving its indicated reading of the exact absolute power levels presented by the signal generator/attenuator chain.
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This test requires step attenuator calibration data to obtain valid results. Make sure you enter the calibration data for the step attenuators that you're using. Please refer to the Enter Equipment Calibration Data section in the TME help for details on how to enter this data. You must enter the data for the following columns to obtain valid results: Attn(dB), Uncert(dB), and ReflSize. |
Click here for troubleshooting.
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Test Equipment |
Recommended Model Number |
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Low Noise Signal Generator |
PSG |
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Power Meter |
N1914B |
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RF Power Sensor |
N8482A |
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10 dB Fixed Attenuator |
8491A Option 010, H33 |
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6 dB Fixed Attenuator |
8491A Option 006, H33 |
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10 dB Step Attenuator |
8496G Option 001, H50 |
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1 dB Step Attenuator |
8494G Option 001, H50 |
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Attenuator Driver |
11713B |
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Attenuator Interconnect Kit |
11716A |
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Type-N Cable |
11500C |
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BNC Cable |
8120-1840 |
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Viking Cable |
8120-2703 |
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1 mm ruggedized (f) to 2.4 mm (f) adapter (for N9041B) |
5067-6655 |
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2.4 mm (m) to Type-N (f) adapter |
11903C |
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3.5 mm (f) to Type-N (f) adapter |
1250-1745 |
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2.4 mm (f) to Type-N (f) adapter |
11903B |
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Type-N (f) to Type-N (f) adapter |
1250-1472 |
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In the following setups, cables are designated as solid lines and direct connections are designated as dashed lines. |
