1.1 This standard is applicable to instruments known as nonreal-time spectrum analyzers ( hereinafter called 'analyzers' ).
1.1.1 These instruments perform analysis of the power distribution of a signal by a sampling process, such as the following:
a) Swept front end — Superheterodyning in which the first local oscillator is swept.
b) Swept IF — Superheterodyning in which other than the first local oscillator is swept.
c) Video detector/tunable filter — Analysis is accomplished by scan-ning the input filter across the signal in proportion to the CRT horizontal deflection with the detector output providing the vertical deflection.
Note — Instruments known as real-time analyzers perform a continuous analysis of the incoming signal with the time sequence of events preserved between input and output. This standard is not applicable to those instruments.