HP 8568B, Performance Tests And Adjustments Manual, Page: 71 / 313

15. Spurious Responses Test
15. Spurious
Responses Test
Related Adjustment
Second Converter Adjustments
Specification
For total signal power of at the input mixer of the
analyzer, all image and out-of-band mixing responses, harmonic and
intermodulation distortion products are
below the total signal
power for input signals 10 Mhz to 1500 MHz; below the total
signal power for input signals 100 Hz to 10 MHz.
Second Harmonic Distortion
For a signal -30 at the mixer and MHz, second harmonic
distortion is down; 60 down for signals MHz.
Third Order Intermodulation Distortion
For two signals each -30 at the mixer, third-order intermodulation
products are:
Description
Harmonic distortion (second and third) is tested using a signal source
and a low-pass filter. The LPF insures that the harmonics measured
are generated by the spectrum analyzer and not by the signal source.
Spurious responses due to image frequencies, out-of-band mixing, and
intermodulation distortion are measured by applying signals from two
separate sources to the spectrum analyzer input.
Performance Tests