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Spectral SNR Measurement
Overview
This section describes the SNR (Signal To Noise Ratio) measurement using the spectrum
analyzer. SNR allows you to measure and compare the signal levels of an erased track
versus an overwritten track.
Measurement
1. To open the Spectral SNR menu, click on [Spectral SNR] button from the Measure
Procedure
menu.
Figure 3-101
Spectral SNR Measurement Menu
NOTE
Before you execute this measurement, you should set an appropriate input range or execute
the Auto Configuration to set the input range automatically.
2. Set the parameters, click on each button to enter a new value.
RBW
Chapter 3
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VEE Measurement Program Operation
Specifies the resolution band width.
Narrowing RBW will widen the dynamic
range. However, depending on the frequency
span, the measurement speed may become
very slow when you set this below 10kHz. The
values which can be set by vary by Spectrum
analyzer the system has. If the system has
4395A or E5040A, the RBWs of 3k, 10k, 30k,
100k, 300k and 1MHz can be set. If the
system has the optional E4402B 3GHz
spectrum analyzer, 3MHz and 5MHz RBWs
can be set additionally. When you use other
than the above values, the closest and lower
value is set automatically.
Measurement
155
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