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NOISE LEVEL MEASUREMENT
Read the noise at the marker by pressing OBrl) b
The noise at 64 MHz is - 134 dBm in a 1 Hz bandwidth. This corresponds to - 134 dBm + 36 dB/4 kHz =
Signal to noise measurements require the measurement of the noise level, as the example above, and the mea-
surement of the absolute signal level. *
Measure the power level of the adp signal. To
turn the noise level off, press fxiFJm and read the
power level.
The signal to noise ratio referenced to 4 kHz bandwidth is - 32 dBm - ( - 98 dBm) = 66 dB.
*Normalization to a desired bandwidth uses the equation 10 log,0 (
60
Manual Operation
desired BW
MARKER
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