Agilent Technologies E1401-90493 13. Input Attenuation Switching Uncertainty

100 Chapter 2

Performance Verification Tests

13. Input Attenuation Switching Uncertainty

A 50 MHz CW signal is applied to the input of the analyzer through two

calibrated step attenuators. The attenuators are the amplitude

reference standard. The source is adjusted for a response at the

reference level. The internal attenuators are then varied between

settings and the external attenuators are changed accordingly to

maintain the same input level at the mixer. The analyzer marker

functions are used to measure the amplitude differences. The actual

attenuation values of the step attenuators are used to correct the

marker amplitude readings yielding the input attenuation switching

error.

The related adjustment for this performance test is “Frequency

Response.”

Equipment Required

Synthesized signal generator

1 dB step attenuator

10 dB step attenuator

Attenuator switch driver (if programmable step attenuators are

used)

6 dB fixed attenuator (2 required)

Cable, Type-N 152-cm (60-in) (2 required)

Cable, BNC 122-cm (48-in)

Attenuator interconnect kit

Additional Equipment for 75 Ω Input

50 Ω to 75 Ω minimum loss pad

Adapter, Type-N (f), to BNC (m), 75 Ω

Additional Equipment for Option BAB

Adapter, Type-N (f), to APC 3.5 (f)