IF Frequency Response Adjustment

(Options B25, B40, B85, B1A, B1X)

This adjustment applies to the following models:

This adjustment generates IF Flatness corrections for Options B25, B40, B85, B1A, and B1X. The amplitude corrections are relative to the center frequency of the IF. For Band 0 the only corrections that are generated are for Options B85, B1A, and B1X. These corrections are 58 overlapping segments from 140 MHz to 3.56 GHz in 60 MHz increments.

If the analyzer has Option MPB (Microwave Preselector Bypass), then corrections are generated in bands 1 through 6 for Options B25, B40, B85, B1A, and B1X. The corrections are single value corrections which are the average error of five measurements taken across the RF Band. Option MPB is necessary because the RF Preselector has approximately a 30 MHz bandwidth. The RF Preselector Bandwidth will band-limit the IF signal if it is in the path.  

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Required Test Equipment

Test Equipment

Recommended Model Number

Microwave Signal Generator #1

PSG Models
(see equipment list)

Power Meter

N1914B

Microwave Power Sensor

  • Options ≤ 526

N8485A 

Microwave Power Splitter

  • Options ≤ 526

11667B

Millimeter Power Sensor

  • Options > 526

N8487A 

Millimeter Power Splitter

  • Options > 526

11667C

Coaxial Cable, 3.5 mm (m) to 3.5 mm (m)

11500F

BNC Cable

8120-1840 

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

3.5 mm (f) to 2.4 mm (f) adapter
(for 2.4 mm source)

11901B

3.5 mm (f) to Type-N (m)
(8485A adapter)

08485-60005

Connection Setups

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

Power Meter Calibration

 

IF Frequency Response Adjustment Setup