50 MHz Calibrator Amplitude Adjustment

There are two different procedures for this adjustment, depending on the calibrator of the DUT.

For CXA-m PXIe signal analyzers with a CS board as the calibrator, the 50 MHz calibrator amplitude cannot be adjusted. The DAC is fixed at a maximum value and the internal 50 MHz calibrator is switched on. The 50 MHz calibrator amplitude is measured and compared to the reference amplitude. The actual 50 MHz calibrator amplitude level is stored in the DUT.

For CXA-m PXIe signal analyzers with an LO board as the calibrator, the adjustment is performed by sourcing a 50 MHz, –25 dBm signal into the DUT. A reference measurement is made on the input signal. Next, the internal 50 MHz calibrator is switched on and the amplitude is measured. An internal DAC is adjusted until the amplitude error becomes zero.

Required Test Equipment

Test Equipment

Recommended Model Number1

Microwave signal generator #1

PSG models
(see main equipment list)

Power meter

N1914A

Low power microwave power sensor

8485D

Attenuator, 10 dB fixed

8493C Option 010

Attenuator, 30 dB fixed

11708A

Cable, BNC (m) to SMB (f)

8121-2063

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

11500E

Adapter, 3.5 mm (f) to 3.5 mm (f)

  • 2 required for 3.5 mm source

83059B

Adapter, 2.4 mm (f) to 3.5 mm (f)

  • For 2.4 mm source

11901B

Adapter, 3.5 mm (f) to Type-N (m)

  • For 8485D power sensor

08485-60005
  1. Refer to the main equipment list for a list of alternative models (if available).

Connection Setups

Power Meter Calibration

Source Power Calibration

 

50 MHz Calibrator Amplitude Adjustment Setup