Trilithic 720 DSP, Operation Manual

Page: 138 / 440

www.trilithic.com
Page II-60
720 DSP Operation Manual
Business Services Meter
Removing Limits from a Limit Set
To remove a limit from the limit set, use the up/down arrow buttons to highlight the limit to
be removed and select the Remove softkey.
Knowing Your Limits
When the 720 DSP performs testing versus a limit set it, immediately display the pass/fail
status for each measurement criteria that you have set.
To meet a minimum limit, the measured values must be equal to or greater than the
minimum limit. To meet a maximum limit the measured values must be less than or equal to
the maximum limit.
• Video Level
– This sets the
minimum and maximum analog
video channel levels.
• Video Audio Delta – This sets the
minimum and maximum allowable
video to audio level difference.
• Video Delta – This sets the
maximum difference allowed
between the lowest and highest
levels measured for the analog
video channels.
• Adjacent Level
– This sets the maximum level variation between any two adjacent
video carriers.
• C/N Level
– This sets minimum carrier to noise ratio.
• Digital Level – This sets the minimum and maximum digital video channel levels.
• Video Digital Delta – This sets the maximum difference allowed between the lowest
and highest levels measured for the digital video channels.
• 16 QAM MER – This sets the minimum MER for digital video channels with 16 QAM
Modulation.