| sumasuma | okie |
| jql | any advice on what headset to get (or not) for a polycom 501? |
| ManxPower | I never thought I'd say this, but I'm starting to hate analog lines I have a 500hz - 650Hz hum (it fluctuates) |
| aptura | odd do you have the signal some kind of scope ? |
| ManxPower | Yes, a Sage Instruments 930A (it is a test set for phone lines) |
| aptura | jql plantronics nice |
| ManxPower | The hum is at about -49db |
| aptura | pretty low |
| ManxPower | Bought it for like $50 off of ebay aptura: yes but users are still complaining I need to test it at the demarc and see if I still have it. We are 11 miles from the CO, but about 2 - 3 miles from this site is a SLIC96 between us and the CO |
| aptura | I have taken a couple years of electronics and cannot think of what discreet electronic componets would produce 500 hz unless it is a multiple of the fundemental frequency. Harmonics! :) |
| ManxPower | I suspect it is a harmonic of 60Hz |
| aptura | It could be some harmonics not being filtered out. If there are electrolitic capacitors in the circuit thay could be getting dry and not working right but would not know what else it could be. Perhaps poor shielding from a harmonic source. Actually it could not be electrolytic it would be disk capacitor. |
| ManxPower | Bell corrected a "ground fault" on one of the lines. |
| [TK]D-Fender | jql, Plantronics M12 amplifier & H261 binaural polaris headset |
| aptura | tiny disk capacitors are used between ground and branches in circuits mostly. so what was the result? I once worked at Fluke some of there network/telco test gear was in the sub 15-20k rang for the upper end hand sets. |
| ManxPower | well that was fun. the result was no hum when I listened to the line, but that was on a butt set, not a real phone I get the same hum, but at about -62db at the demarc |
| aptura | butt set is one of those orange test phones? disregard :) |
| ManxPower | on the 2nd line I get a 120hz - 190hz at -59db |
| ltdwk | unlucky |
| aptura | anything at 180? 120 I can understand but 190? Manx looks like something I used 15 years ago but for Avionics. The sage is not something you normally lug around |
| ManxPower | no it isn't on hook it is around 80hz at -50db or so |
| aptura | dbm |