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146 Chapter 11
Analog Demodulation Measurement Application
Frequency Modulation - Level and Carrier Metrics
Frequency Modulation - Level and Carrier Metrics
Description Specifications Supplemental Information
FM Deviation Accuracy
Rate: 1 kHz - 1 MHz,
Deviation: 1 - 100 kHz
a
a. For optimum measurement of rate and deviation, ensure that the channel bandwidth is set wide enough
to capture the significant RF energy (as visible in the RF Spectrum window). Setting the channel
bandwidth too wide will result in measurement errors.
±(1% of (rate + deviation) +
20 Hz) (nominal)
FM Rate Accuracy
Rate: 1 kHz - 1 MHz
ab
b. Rate accuracy at high channel bandwidths assumes that the deviation is sufficiently large to overcome
channel noise.
±0.2 Hz (nominal)
Carrier Frequency Error ±0.5 Hz (nominal)
Assumes signal still visible in
channel BW with offset
Carrier Power ±0.85 dB (nominal)