Teledyne-lecroy AORM - Advanced Optical Recording Measurements Manual de usuario descargar pdf (Pagina 70)

68 ISSUED: June 2013 923133 Rev A

PMODA PIT MODULATION AMPLITUDE

Description

Pit Modulation Amplitude provides a measurement of the ratio of the Pit Average Amplitude (paa)

for the low ‘nT’ pits/spaces in the data signal to the Pit Top (ptop) of the high ‘nT’ pits in the data

signal:

PMODA

paa

avg top

low n

high n

()

The low a

nd high ‘nT’ values to be used for performing the calculation are provided by the user

through the associated measurement configuration options. Some measurements of modulation

amplitude require the low and high n index to be identical. The value is shown is decimal. The

measurement calculation is compliant with the definition of Modulation Amplitude as defined by

IEC 908:1987 Section 9.2 and ISO/IEC 10149:1995 (E) Section 12.2.

Note: This measurement must be performed on the DC-coupled optical data waveform, otherwise incorrect values will

result.

Display Options

ORM parameter calculations can be displayed, histogrammed, and trended in a variety of ways.

DISPLAY TYPE VALUE DISPLAYED

Parameter Statistics Off

Single value of the modulation amplitude for the last acquisition.

Parameter Statistics On

Average, minimum, maximum, and sigma of the single

modulation amplitude value calculated per acquisition for all

acquisitions since the last C

LEAR SWEEPS operation.

Histogram Function

Histogram of the modulation amplitude value calculated per

acquisition for all acquisitions since the last CLEAR SWEEPS

operation.

Trend Function

Trend of the single modulation amplitude value calculated per

acquisition for all acquisitions since the last C

LEAR SWEEPS

operation.

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Teledyne-lecroy AORM - Advanced Optical Recording Measurements Manual de usuario Pagina 70