Analog Demodulation Measurement Application - Keysight M9290A Manual

9 Analog Demod ulation Measurement Application
This chapter contains specifications for the N9063A Analog Demodulation Measurement Application.
Add itional Definitions and Requirements
The warranted specifications shown apply to Band 0 operation (up to 3.0 GHz), unless otherwise noted, for
all analyzer's. The application functions, with nominal (non-warranted) performance, at any frequency
within the frequency range set by the analyzer frequency options (see table). In practice, the lowest and
highest frequency of operation may be further limited by AC coupling; by "folding" near 0 Hz; by DC
feedthrough; and by Channel BW needed. Phase noise and residual FM generally increase in higher bands.
Warranted specifications shown apply when Channel BW  1 MHz, unless otherwise noted. (Channel BW is
an important user-settable control.) The application functions, with nominal (non-warranted) performance,
at any Channel BW up to the analyzer's bandwidth options (see table). The Channel BW required for a
measurement depends on: the type of modulation (AM, FM, PM); the rate of modulation; the modulation
depth or deviation; and the spectral contents (e.g. harmonics) of the modulating tone.
Many specs require that the Channel BW control is optimized; neither too narrow nor too wide.
Many warranted specifications (rate, distortion) apply only in the case of a single, sinusoidal modulating
tone; without excessive harmonics, non-harmonics, spurs, or noise. Harmonics, which are included in most
distortion results, are counted up to the 10th harmonic of the dominant tone, or as limited by SINAD BW or
post-demod filters. Note that SINAD will include Carrier Frequency Error (the "DC term") in FM by default;
it can be eliminated with a HPF or Auto Carrier Frequency feature.
Warranted specifications apply to results of the software application; the hardware demodulator driving the
Analog Out line is described separately.
Warranted specifications apply over an operating temperature range of 20 to 30°C; and mixer level –24 to
–18 dBm (mixer level = Input power level – Attenuation). Additional conditions are listed at the beginning of
the FM, AM, and PM sections, in specification tables, or in footnotes.
Refer to the footnote for .
"Definitions of terms used in this chapter" on page 80
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