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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Spent an interesting hour e-chatting with Humax UK support trying to get hold of v1.03.12 during which they directed me to https://wiki.hummy.tv/wiki/Firmware_Downloads ...where, as previously advised, the link to the official firmware doesn't work. Ivan very keen to help (until his shift ended...- Newcoppiceman
- Post #105
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
A wonderful resource and I fully digested the latest edition's contents along with a nice curry in Basingstoke last week!- Newcoppiceman
- Post #104
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Hopefully those broken links can be fixed. Not doing anything unusual - just trying to use the PVR as we normally do using the remote handset. LAN has been disconnected since reinstalling in TV cabinet as cable to powerline adapter wouldn't reach. I'd assumed I could simply re-install...- Newcoppiceman
- Post #102
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Tidying up some loose ends on this one... On Saturday I swapped the two PVRs over so that the original PVR was back in the TV cabinet as our in-service PVR and the spare connected up to a second HDMI input of the TV until we'd watched the two or three recordings left on it after its stint as...- Newcoppiceman
- Post #100
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
As previously discussed, this thread needs to be retitled to be more helpful to others. How about "Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes"? How do I go about this?- Newcoppiceman
- Post #97
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Quite so, plus the fact it would be easier to replace the likely duff reservoir cap than to sanitise the temporary setup; also would need a working spare. The unusual splitter design is because I ripped the original inductive one apart trying to remove it from the Antiference PSU (very tight...- Newcoppiceman
- Post #96
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
No perhaps about it! I still have an old single output Antiference 12V PSU so have deployed this with a splitter to provide the two feeds (temporary arrangement until I fix the original PSU - probably the reservoir electrolytic). Thank you for your interest, insight, suggestions, etc. Nice...- Newcoppiceman
- Post #90
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Yes, yes I know! I RTFMed before the meter had even arrived! I misunderstood your "just repeat measurements downstairs" as meaning the ones I'd made this morning (without antenna power enabled) but you meant with it on I now appreciate. I was a tad suspicious of that 11.0V reading ...and...- Newcoppiceman
- Post #87
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
That first suggestion is a good one. Re the second one, not sure how I'd interpret the results given that the signal would have passed through an unpowered preamp. I've already checked at the output of the PSU/splitter to confirm the problem is present there (as it should be with only coax...- Newcoppiceman
- Post #83
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Some interesting results from readings taken with the new meter this morning between 10:30 and 11:30. Weather in Woking: fine, sunny and clear. In the loft, coming from the aerial (UHF channel - Signal strength in dBuV - C/N in dB - Post-correction BER): 22 - 51.5 - 32.0 - QEF (defined as...- Newcoppiceman
- Post #81
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Using UHF 30, unplugging feed to in-service/replacement PVR and connecting to meter: 65.5dBuV; reconnecting to PVR and using short, good quality extender lead to connect PVR to meter: 68.0dBuV. So Humax gain is 2.5dB - about what you'd expect.- Newcoppiceman
- Post #77
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
I have a couple of in-line attenuators (6dB and 12dB, together 18dB) but to do the job properly I'd need a calibrated switchable RF attenuator with 2 or 5dB steps (time to head to eBay). The Humax signal strength indication might well be highly non-linear whether it's showing voltage or dBs.- Newcoppiceman
- Post #76
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Pic showing UHF 22, 23, 25, 26, 28 and 30 muxes. The 64-QAM muxes' post-error correction BERs have improved since this morning and are now (15:00) varying between E-03 and E-07; the other two remain at a solid <1.0E-08 so very definitely QEF (Quasi Error Free).- Newcoppiceman
- Post #73
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
There is a danger of T2 confusion here! (i) HDR-Fox T2; (ii) DVB-T2; (iii) Digiair pro T2 (the meter). This morning was very much a familiarisation session with the new meter. I haven't (yet) quoted signal levels as they would have been, as you say, with the PVR's pass-through amplifier...- Newcoppiceman
- Post #71
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
I think they are - when the problem is present; it often isn't - that's why, for example, my Saturday (15:00) and Tuesday (19:55) recordings of Thunderbirds throughout Oct were clean. Will consider the rogue EMI possibility, but unlikely I think. The various levels of QAM represent different...- Newcoppiceman
- Post #69
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
The puzzle now is why the lounge TV (yet to check fully the upstairs one) appears immune to the woeful/varying BER measured by the meter - it had no problem displaying Talking Pictures TV this morning at the same time as the PVR's pic was riddled with break-up (this was after I had removed the...- Newcoppiceman
- Post #68
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
An update on this saga. The replacement PVR is just as badly affected as the original one, so this isn't a problem with the PVR. Some services have again suffered bad picture/sound break-up throughout the week, including on Tuesday evening (so my recording of Thunderbirds on Talking Pictures...- Newcoppiceman
- Post #65
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
That accords with the ~3dB distribution losses measured in 2003 (single output PSU) and the ~7dB losses measured in 2018 (two output PSU).- Newcoppiceman
- Post #64
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Thanks to Rodders53 for his (presumably, but you never know) helpful contributions. We're quite low down to the west of Woking at GU21 8US, close to the Basingstoke Canal. Our aerial is on the side of the house because when I moved here in 1995 the installer couldn't get a satisfactory signal...- Newcoppiceman
- Post #61
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Antiference (a brand I trust) has a rather limited range these days. The RX20A has a forward gain of 14.5dBi, the XG16EW's is 17.2dBi. Seems the only Group A in the XG range is an XG8A (14.5dBi).- Newcoppiceman
- Post #57
- Forum: HDR-FOX T2 Freeview Recorder
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-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Spent an interesting hour e-chatting with Humax UK support trying to get hold of v1.03.12 during which they directed me to https://wiki.hummy.tv/wiki/Firmware_Downloads ...where, as previously advised, the link to the official firmware doesn't work. Ivan very keen to help (until his shift ended...- Newcoppiceman
- Post #105
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
A wonderful resource and I fully digested the latest edition's contents along with a nice curry in Basingstoke last week!- Newcoppiceman
- Post #104
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Hopefully those broken links can be fixed. Not doing anything unusual - just trying to use the PVR as we normally do using the remote handset. LAN has been disconnected since reinstalling in TV cabinet as cable to powerline adapter wouldn't reach. I'd assumed I could simply re-install...- Newcoppiceman
- Post #102
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Tidying up some loose ends on this one... On Saturday I swapped the two PVRs over so that the original PVR was back in the TV cabinet as our in-service PVR and the spare connected up to a second HDMI input of the TV until we'd watched the two or three recordings left on it after its stint as...- Newcoppiceman
- Post #100
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
As previously discussed, this thread needs to be retitled to be more helpful to others. How about "Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes"? How do I go about this?- Newcoppiceman
- Post #97
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Quite so, plus the fact it would be easier to replace the likely duff reservoir cap than to sanitise the temporary setup; also would need a working spare. The unusual splitter design is because I ripped the original inductive one apart trying to remove it from the Antiference PSU (very tight...- Newcoppiceman
- Post #96
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
No perhaps about it! I still have an old single output Antiference 12V PSU so have deployed this with a splitter to provide the two feeds (temporary arrangement until I fix the original PSU - probably the reservoir electrolytic). Thank you for your interest, insight, suggestions, etc. Nice...- Newcoppiceman
- Post #90
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Yes, yes I know! I RTFMed before the meter had even arrived! I misunderstood your "just repeat measurements downstairs" as meaning the ones I'd made this morning (without antenna power enabled) but you meant with it on I now appreciate. I was a tad suspicious of that 11.0V reading ...and...- Newcoppiceman
- Post #87
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
That first suggestion is a good one. Re the second one, not sure how I'd interpret the results given that the signal would have passed through an unpowered preamp. I've already checked at the output of the PSU/splitter to confirm the problem is present there (as it should be with only coax...- Newcoppiceman
- Post #83
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Some interesting results from readings taken with the new meter this morning between 10:30 and 11:30. Weather in Woking: fine, sunny and clear. In the loft, coming from the aerial (UHF channel - Signal strength in dBuV - C/N in dB - Post-correction BER): 22 - 51.5 - 32.0 - QEF (defined as...- Newcoppiceman
- Post #81
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Using UHF 30, unplugging feed to in-service/replacement PVR and connecting to meter: 65.5dBuV; reconnecting to PVR and using short, good quality extender lead to connect PVR to meter: 68.0dBuV. So Humax gain is 2.5dB - about what you'd expect.- Newcoppiceman
- Post #77
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
I have a couple of in-line attenuators (6dB and 12dB, together 18dB) but to do the job properly I'd need a calibrated switchable RF attenuator with 2 or 5dB steps (time to head to eBay). The Humax signal strength indication might well be highly non-linear whether it's showing voltage or dBs.- Newcoppiceman
- Post #76
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Pic showing UHF 22, 23, 25, 26, 28 and 30 muxes. The 64-QAM muxes' post-error correction BERs have improved since this morning and are now (15:00) varying between E-03 and E-07; the other two remain at a solid <1.0E-08 so very definitely QEF (Quasi Error Free).- Newcoppiceman
- Post #73
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
There is a danger of T2 confusion here! (i) HDR-Fox T2; (ii) DVB-T2; (iii) Digiair pro T2 (the meter). This morning was very much a familiarisation session with the new meter. I haven't (yet) quoted signal levels as they would have been, as you say, with the PVR's pass-through amplifier...- Newcoppiceman
- Post #71
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
I think they are - when the problem is present; it often isn't - that's why, for example, my Saturday (15:00) and Tuesday (19:55) recordings of Thunderbirds throughout Oct were clean. Will consider the rogue EMI possibility, but unlikely I think. The various levels of QAM represent different...- Newcoppiceman
- Post #69
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
The puzzle now is why the lounge TV (yet to check fully the upstairs one) appears immune to the woeful/varying BER measured by the meter - it had no problem displaying Talking Pictures TV this morning at the same time as the PVR's pic was riddled with break-up (this was after I had removed the...- Newcoppiceman
- Post #68
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
An update on this saga. The replacement PVR is just as badly affected as the original one, so this isn't a problem with the PVR. Some services have again suffered bad picture/sound break-up throughout the week, including on Tuesday evening (so my recording of Thunderbirds on Talking Pictures...- Newcoppiceman
- Post #65
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
That accords with the ~3dB distribution losses measured in 2003 (single output PSU) and the ~7dB losses measured in 2018 (two output PSU).- Newcoppiceman
- Post #64
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Thanks to Rodders53 for his (presumably, but you never know) helpful contributions. We're quite low down to the west of Woking at GU21 8US, close to the Basingstoke Canal. Our aerial is on the side of the house because when I moved here in 1995 the installer couldn't get a satisfactory signal...- Newcoppiceman
- Post #61
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Antiference (a brand I trust) has a rather limited range these days. The RX20A has a forward gain of 14.5dBi, the XG16EW's is 17.2dBi. Seems the only Group A in the XG range is an XG8A (14.5dBi).- Newcoppiceman
- Post #57
- Forum: HDR-FOX T2 Freeview Recorder