Slide 1: SmartScan: Finding Problems between TAP and the Home
SmartScan™ Finding Problems between TAP and the Home Rob Flask
Slide 2: Finding issues between the TAP and the Home
Finding issues between the TAP and the Home Technician needs to perform an adequate set of tests at the TAP to show that the performance is not meeting specification. • Proper Levels • Peak to Valley • Performance of any offending service SmartScan™ Helps find Issues SmartScan™ Technology is Paten
Slide 3: Validate tap performance
Validate tap performance Min analog Video Power Levels must be Ch 2-78 15.6dBmv STB maintained for high 1000 MHz system TV Min QAM frequency losses Ch 79-158 8.75 dBmV Resonant Frequency TAP absorption Low end roll off High end roll off House Drop Cable BLOCK GROUND 55.25 MHz 745.25 MHz 3-Way 2-Way
Slide 4: SmartScan - Finds RF problems at tap
SmartScan™ - Finds RF problems at tap Finds RF response issues that are out of spec Compares against existing limit set plus peak to valley and max/min tilt (the peak to valley limit is labeled drop check in the limit set during this beta version) Automatically Tilt Compensates and Normalizes analog
Slide 5: If systems were flat!
If systems were flat! Tight limit bands would be a simple solution Ideal Case Analog tiers Digital Tiers 20 15 Level (dBmV) 10 Ideal TV 5 Typ 0 -5 IdealHLimit -10 IdealLowLimit -15 -20 50 0 0 0 0 0 0 0 0 0 15 25 35 45 55 65 75 85 95 Freq (MHz) 5 © 2009 JDSU. All rights reserved. JDSU CONFIDENTIAL &
Slide 6: In real systems – tilt happens!
In real systems – tilt happens! Tilt Affects Limits 20 15 Ideal TV Level (dBmV) 10 Typ 5 PosTilt 0 NegTilt -5 -10 IdealHLimit -15 IdealLowLimit -20 0 0 0 0 0 0 0 0 0 50 15 25 35 45 55 65 75 85 95 Freq (MHz) 6 © 2009 JDSU. All rights reserved. JDSU CONFIDENTIAL & PROPRIETARY INFORMATION
Slide 7: SmartScan Eliminates Interpretation issues and solves problems
SmartScan™ Eliminates Interpretation issues and solves problems Differences in power levels between analog and digital carriers may be difficult to interpret for a technician Tilt isn’t easily known – Techs can’t input tilt value to compensate – Wider limits allow bad channels to pass Adjacent
Slide 8: New approach to find issues
New approach to find issues Goal is to find network issues that affect customers – Suckouts – Bad Channels – Bad passives (Tap Plates, 750 MHz splitters, etc) Provide Tech with a view that eliminates tilt Provide Tech with a view that “compensates” for channel type Tighter limit set for tilt
Slide 9: How do we make this Better? Step 1: Compensate for Tilt
How do we make this Better? Step 1: Compensate for Tilt Compensate for Tilt 25.0 20.0 15.0 Level (dBmV) 10.0 Typ 5.0 PosTilt 0.0 -5.0 NegTilt -10.0 -15.0 -20.0 0 0 0 0 0 0 0 0 0 50 15 25 35 45 55 65 75 85 95 Freq (MHz) SmartScan™ Automatically calculates tilt and compensates for system tilt 9 © 2009
Slide 10: Step 2: Compensate for different channel types
How do we make this better? Step 2: Compensate for different channel types Compensate for Channel Type 25.0 20.0 15.0 Level (dBmV) 10.0 5.0 Typ 0.0 Channel Comp -5.0 -10.0 -15.0 -20.0 0 0 0 0 0 0 0 0 0 50 15 25 35 45 55 65 75 85 95 Freq (MHz) SmartScan™ automatically normalizes carriers based on ch.
Slide 11: Step 3: Normalize and provide tighter limit bands
How do we make this better? Step 3: Normalize and provide tighter limit bands Normalize And Peak/Valley Limits 25.0 20.0 Deviations in dBmV 15.0 10.0 Normalized 5.0 High Limit 0.0 -5.0 Low Limit -10.0 -15.0 -20.0 1 3 5 7 9 11 13 15 17 19 Freq (MHz) SmartScan™ provides a normalized view so individual
Slide 12: Other Information
Other Information SmartScan uses all of the enabled carriers in the channel plan just like Full Scan SmartScan compares the channels against the active limit set just like Full Scan SmartScan adds additional limits of Max Tilt, Min Tilt, and Peak to Valley (labeled as Drop Check in limit setti