|
O.K. I have tried to create a step by step set of instructions for myself based on your recommendations (this antenna stuff can be difficult for the average Joe). If something needs correcting, please let me know.
1. Move the C2V to approximately 5 feet or so away from the 91XG.
2. Run, new high quality RG6 cable (I'll be using the brand I already linked) from each antenna to a single tuner (bypassing the CM3414 and the use of any splitters) testing for reliable reception. If reliable reception is not obtained, try adjusting aim. If reliable reception is obtained, this could suggest some issue with the cable that needs to be replaced/fixed (because I don't recall that Fox has never been able to do that with this antenna setup without the use of a distribution amp; it seems other signals have been lower too).
3. If reliable reception is not obtained from each antenna using the new, high quality coax to a single tuner without the use of a distribution amp/splitter or after readjusting aim, consider changing out that antenna.
4. If/when reliable reception is obtained (and after replacing any cable from the downleads from the antennas) move the AC7 combiner into the attic.
5. Without the AC7 combiner being connected and after reliable reception is obtained, add the RCA TVPRAMP1R on the 91XG (C2V can't be amplified due to the specifications of the AC7 combiner). Observe results using signal strength/signal quality on the single tuner. If tuner is overpowered or signal quality/strength is negatively affected, re-evaluate after splitting the signal either though a 4 way splitter or the CM3414.
6. Add/utilize an FM trap on both antennas. If using the FM trap on the RCA preamp, use 1-3 feet of RG6 cable connected to the antenna and the other end to the trap (preamp input connects to the output of the trap and switch is turned on). If using the Radioshack FM trap, it can be connected toward the beginning of the download of an antenna or at the end of a downlead before any distribution amp.
7. Reconnect antenna downleads to the AC7 combiner. Run output from AC7 combiner to the CM3414 distribution amp. Check signal quality/strength on all tuners.
8. Disconnect AC7 output from the CM3414 distribution amp. Then connect AC7 output to 4 way splitter instead. Check signal quality/strength on all tuners.
9. If significant disparity exists for signal quality/strength between the CM3414 and 4 way splitter (particularly if much lower readings are present from using 4 way splitter) replace/repair coaxial cables running to all 3 TV's. Then recheck each way of connecting again. Compare those results to previous results. Use whichever accessory between the CM3414 and the 4 way splitter produces the best results for all TV's/tuners.
10. Finally, install attenuators on the "input" ports for each antenna on the AC7 combiner and one attenuator on the "outport" of the AC7 combiner. Check signal quality/strength on all tuners. If signal quality/strength drops or picture deteriorates remove attenuators.
|