IF Frequency Response Performance Test

IF Frequency Response is one component of the analyzer Error Vector Magnitude (EVM) specification.

In this test a 1.5 GHz, –10 dBm signal is applied to the analyzer. This input level establishes a mixer level of –20 dBm. A reference amplitude is taken with the input signal centered at the analyzer center frequency. The analyzer center frequency is then changed to set the input signal at various offsets within the FFT span of interest. At each offset frequency the amplitude is measured by the analyzer. The amplitude difference between the offset frequency and the reference frequency is reported as the IF Frequency Response. This measurement is performed in IQ analyzer mode, so the span is also the FFT width. This measurement is performed for the standard 10 MHz IF path (if Option B25 is installed the bandwidth is 25 MHz).

Required Test Equipment

Test Equipment

Recommended Model Number1

Microwave signal generator #1

PSG models
(see main equipment list)

Cable, BNC (m) to SMB (f)

8121-2063

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

11500E

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

  • For 3.5 mm source

83059B

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

  • For 2.4 mm source

11901B
  1. Refer to the main equipment list for a list of alternative models (if available).

Connection Setup