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Trial Results

Background. The following are results from the first week of the live trial performed from 12/3/07 through 12/7/07.Network troubleshooting using Hunter was performed 12/4

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Trial Results

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    1. Trial Results

    2. Background The following are results from the first week of the live trial performed from 12/3/07 through 12/7/07. Network troubleshooting using Hunter was performed 12/4 – 12/6. Two teams of technicians with Arcom representatives worked in 10 of the 32 designated trial nodes fixing 13 impairments using Hunter. The trial effectively demonstrated that CPD sources could be easily identified and permanently repaired. The following is a description of the work that was performed, procedures taken and ending results.

    3. Before/After CPD Statistics CPD Alarms 12-4 CPD Alarms 12-7

    4. Before/After CPD Charts Nodes with CPD 12/04/07 Nodes with CPD 12/07/07

    5. This node presented a CPD source located at 120.525uS from the headend server. Once determining to work on this this node, the first step was to go to the node and isolate which leg the source of the impairment is located. Node WI137 – step 1

    6. Node WI137 – step 2 Using the Quiver handheld radar, we measured CPD 9.15uS from the node coming from the west leg. After inputting the time-distance into Quiver Navigator maps, Navigator directed us to the next logical split at amp AM0022.

    7. Node WI137 – step 3 Now at amp AM0022 we used the Quiver handheld radar again and without taking the network down we were able to measure a CPD time-distance at 4.87uS coming from the western leg. After inputting this time-distance into Navigator we determined to proceed to amp AM0034.

    8. Node WI137 – step 4 At amp AM0034 we used the Quiver probe on the seizure screw test point of splitter SP0012 and measured CPD 2.4uS heading north. Quiver Navigator showed the source of the impairment to be located at tap TP0197 or terminator TM0026.

    9. Node WI137 – step 5 At the tap TP0197 and terminator TM0026 location, technicians went through their normal troubleshooting of visually inspecting the equipment, tightening connections and replaced line terminator TM0026. The pin of the terminator was corroded and loose. Using headend mode in the Quiver we verified that the CPD impairment was fixed. We were able to locate and fix the source of this node’s impairment within 50 minutes and in 3 determined stops after the node.

    10. CPD Stats for WI137 The graph below represents the CPD statistics for Node WI137 from 12-4-07 through 12-7-07. This node’s impairment was in high alarm from 12pm to 11pm on 12-4-07. Even though this impairment’s amplitude dropped to a low level on 12-5-07, we were able to track and fix during normal work hours using Hunter.

    11. Node WI122 This node had 3 impairments fixed over the first week of the trial. On 12/4/07 there was CPD at 4.15uS from the node. In 3 stops we found and fixed a cracked cable at the input connector at the tap. On 12/6/07 there was CPD 8.4uS and 10.89uS from the node. Both impairments were tracked to line terminators and were fixed within 1 hour.

    12. Node WI122 – Graph 12/4 – 12/7

    13. Node VC003 Using Quiver at the node we measured CPD 13.78uS (approx 6063 feet from node). By knowing the time-distance and using our Quiver Navigator maps we were able to bypass 5 amplifiers, 6 splitters and 4 DC’s. The impairment was found in 4 stops after the node and fixed within an hour and a half. Source was a line terminator.

    14. Node BA001 BA001 showed 2 sources of CPD at 2.62uS and 10.8uS from the node. We were able to track both concurrently down the same leg. Sources split off of different legs out of amp AM0031. After fixing the closer impairment we went back to AM0031 and proceeded to track and fix the farther impairment. Both sources were line terminators.

    15. Node WI042 We measured CPD 4.60uS from the node. In 2 stops from the node we located a cracked cable wrapped in aluminum foil and tie wraps. I new piece of cable was spliced in and fixed the impairment.

    16. Node WI043 Measured CPD 5.64uS from node. In 4 stops we tracked source to a terminated tap with a broken port and 2 blackened terminators

    17. Node WI093 Distance to the CPD source from the node was 3.87uS. In two stops after the node source of impairment was a bad terminator on a DC-7

    18. Node WI048 CPD source measured at 9.505uS from node.

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