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SNR Measurement
Overview
This section describes the SNR (Signal To Noise Ratio) measurement. SNR allows you to
measure and compare the signal levels of an erased track and an overwritten track.
Measurement
1. To open the SNR menu, click on the [SNR] button from the Measure menu.
Procedure
Figure 3-100
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.
Channel Bit Rate
Noise Reference
Write Current
Sense Current
Data Pattern
Average
Chapter 3
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VEE Measurement Program Operation
Specifies the speed at which data bits are
written on the media per second [bps].
Specifies the reference level to measure noise.
Input the estimated noise level.
Specifies the current applied to the write head.
Specifies the current applied to the read head.
Specifies the data pattern to be written on the
test track. To set the data pattern, click on the
[Configuration] > [Setup] > [Pattern Config]
buttons to open the data pattern menu.
Specifies the number of revolutions to get the
averaged results.
Measurement
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