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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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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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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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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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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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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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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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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
More at https://en.wikipedia.org/wiki/Driven_and_parasitic_elements The XG14A (no longer available) uses a normal dipole, then. So might go for XG16EW (normal dipole) or RX20A (looks like folded dipole): https://antiference.co.uk/product-category/aerials/ I guess a Group A/K aerial is not...- Newcoppiceman
- Post #54
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
6 March 1998- Newcoppiceman
- Post #51
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
The dipole is an X type, rather than a folded one. Please explain "a dipole for the driven element". I can easily restore the LTE filter as it does have F-connectors.- Newcoppiceman
- Post #48
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Thanks for your comments, and welcome to the group. I still have the spec sheet for the Antiference Extragain range (I have an XG14A - Group A) which states that "Maximum signal transfer from aerial to cable is guaranteed with tuned baluns and resonators". I think that the balun is the...- Newcoppiceman
- Post #47
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
I bought the last one on eBay at £299.95, new (I sold my old Maxpeak about a year ago for £150 - see pic). Designed and manufactured in Sweden with good documentation and likely good support too, it stood out from all the Chinese stuff and the cheaper "finders". Until I read the manual I was...- Newcoppiceman
- Post #42
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
The previous Maxpeak TAM DVB-T meter (didn't decode -T2) had a lot of use around digital switchover, not much thereafter it's true to say. So yes, a bit of an indulgence, but invaluable when trying to troubleshoot reception issues and a reassuring presence in the household. (I just think of...- Newcoppiceman
- Post #39
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Might have been too quick to accuse the RF feed after replacing the PVR yesterday morning if the pic in my post #20, taken at 05:51, was taken while ERP or radiation pattern was affected by those planned engineering works at CP. Heavy rain last night, but no break-up on replacement PVR and...- Newcoppiceman
- Post #37
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Essentially the same thing - it's a term used by RF engineers where the wanted bit is the carrier (rather than a baseband signal, such as audio or video).- Newcoppiceman
- Post #34
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Carrier-to-noise ratio. Shirley you knew that!?- Newcoppiceman
- Post #32
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
All the above rings true from the extensive research I undertook in the mid-2000s when struggling to get the (then) weak muxes which were side-by-side with the analogue channels. I consulted CAI, DTG and manufacturers' publications and borrowed a Promax from work several times to measure...- Newcoppiceman
- Post #29
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Will try later. For now, have confirmed +11.0V reaching the preamp.- Newcoppiceman
- Post #26
- Forum: HDR-FOX T2 Freeview Recorder
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Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
No. That's probably weather-related co-channel interference, which is what I put the problem down to when it first occurred on the morning of 9 October - has been problematic since then which can't surely be down to CCI. In 10+ years we've only had one previous instance of CCI which I logged...- Newcoppiceman
- Post #24
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
That the HDR-Fox T2 had been working fine for years and that two TVs on the same RF feed seemed untroubled suggested (but didn't prove) that the problem lay with the PVR; the alternative, ie that the signal had degraded sufficiently to seriously trouble the PVR but neither TV, seemed less likely...- Newcoppiceman
- Post #22
- Forum: HDR-FOX T2 Freeview Recorder
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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
-
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
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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
-
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
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
More at https://en.wikipedia.org/wiki/Driven_and_parasitic_elements The XG14A (no longer available) uses a normal dipole, then. So might go for XG16EW (normal dipole) or RX20A (looks like folded dipole): https://antiference.co.uk/product-category/aerials/ I guess a Group A/K aerial is not...- Newcoppiceman
- Post #54
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
6 March 1998- Newcoppiceman
- Post #51
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
The dipole is an X type, rather than a folded one. Please explain "a dipole for the driven element". I can easily restore the LTE filter as it does have F-connectors.- Newcoppiceman
- Post #48
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Thanks for your comments, and welcome to the group. I still have the spec sheet for the Antiference Extragain range (I have an XG14A - Group A) which states that "Maximum signal transfer from aerial to cable is guaranteed with tuned baluns and resonators". I think that the balun is the...- Newcoppiceman
- Post #47
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
I bought the last one on eBay at £299.95, new (I sold my old Maxpeak about a year ago for £150 - see pic). Designed and manufactured in Sweden with good documentation and likely good support too, it stood out from all the Chinese stuff and the cheaper "finders". Until I read the manual I was...- Newcoppiceman
- Post #42
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
The previous Maxpeak TAM DVB-T meter (didn't decode -T2) had a lot of use around digital switchover, not much thereafter it's true to say. So yes, a bit of an indulgence, but invaluable when trying to troubleshoot reception issues and a reassuring presence in the household. (I just think of...- Newcoppiceman
- Post #39
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Might have been too quick to accuse the RF feed after replacing the PVR yesterday morning if the pic in my post #20, taken at 05:51, was taken while ERP or radiation pattern was affected by those planned engineering works at CP. Heavy rain last night, but no break-up on replacement PVR and...- Newcoppiceman
- Post #37
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Essentially the same thing - it's a term used by RF engineers where the wanted bit is the carrier (rather than a baseband signal, such as audio or video).- Newcoppiceman
- Post #34
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Carrier-to-noise ratio. Shirley you knew that!?- Newcoppiceman
- Post #32
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
All the above rings true from the extensive research I undertook in the mid-2000s when struggling to get the (then) weak muxes which were side-by-side with the analogue channels. I consulted CAI, DTG and manufacturers' publications and borrowed a Promax from work several times to measure...- Newcoppiceman
- Post #29
- Forum: HDR-FOX T2 Freeview Recorder
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N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
Will try later. For now, have confirmed +11.0V reaching the preamp.- Newcoppiceman
- Post #26
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
No. That's probably weather-related co-channel interference, which is what I put the problem down to when it first occurred on the morning of 9 October - has been problematic since then which can't surely be down to CCI. In 10+ years we've only had one previous instance of CCI which I logged...- Newcoppiceman
- Post #24
- Forum: HDR-FOX T2 Freeview Recorder
-
N
Faulty Preamp PSU Caused Humax Reception Problems on Some Muxes
That the HDR-Fox T2 had been working fine for years and that two TVs on the same RF feed seemed untroubled suggested (but didn't prove) that the problem lay with the PVR; the alternative, ie that the signal had degraded sufficiently to seriously trouble the PVR but neither TV, seemed less likely...- Newcoppiceman
- Post #22
- Forum: HDR-FOX T2 Freeview Recorder