SDA-OPT4B: 64/256 QAM, DVS-031, ITU-T J.83 Annex B
QAM (Quadrature Amplitude Modulation) This option is available for SDA-4040D and SDA-5000 analyzers. Contact us before purchase. (754)368-6180 support@avcsonline.com
The SDA analyzes two quadrature amplitude modulation formats, 64 QAM
and 256 QAM. Modulation Type 64/256 QAM, DVS-031, ITU-T J.83 Annex B
Digital Analysis (QAM OPT4B) Options
Digital Signal Quality Meas: This option enables you to select the
digital signal quality measurement you want to use:
MER (modulation error ratio) is analogous to an analog carrier-to-noise
measurement
EVM (error vector magnitude) is MER data presented in a percentage
format.
Number of Constellation Points: You can set the number of
constellation points displayed in Constellation mode to 2000, 4000, or
8000. The unit defaults to 4000.
Velocity of Propagation: The velocity of propagation is the ratio of the
speed at which light travels down a length of cable compared to its
absolute speed. It is determined by the dielectric material used to
separate the two conductors and is usually specified by the cable
manufacturer. After you have consulted the manufacturers
specifications, enter a value between 0.00 and 1.00.
Distance Units: In Equalizer Mode, this option enables you to set the
units for measuring the distance to the fault in either feet or meters. This option defaults to feet. Contact us before purchase. (754)368-6180 support@avcsonline.com
Manufacturer: JDSU ACTERNA WAVETEK
SKU: SDA-OPT4B
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