UHF

[mr_anfield]

I had a box that was constantly getting "INVALID CARD" or "CANNOT VALIDATE YOUR SMARTCARD"...

Upon investigation, i found that the UHF number for the Signal strength had been reset to "21"<br />Once id corrected this to the local transponder settings the problem has gone...100% pure free **, without any "Validation" errors, or box lockups!!!

Hope this info might help some of you guys out there !!!!

Perhaps it might be a good idea to have a list of UHF numbers on here from different areas, so we can all get the perfect signal (Depentant on your arial of course!!!)

[ 29 November 2001: Message edited by: Mr_Anfield ]</p>

 

[cosmoss]

Mine is also set to 21 and my signal strength is very low, although I have no problems receiving all channels... I would be interested to know what it's meant to be set to.

 

[griffin]

M8's

Isn't the UHF the channel number that the box is outputting on the RF co-ax connector on the back?

How could this affect reception of I** Dig?

It could affect reception of standard broadcast channels (ie non digital bbc, i**, 4 and 5). These could clash with the channel set by the stb.

if you are using a scart you shouldn't get any picture issues.

I don't think the UHF affects reception only output.

Or have am I missing the point?

Thanx

<img src="smile.gif" border="0"> <img src="wink.gif" border="0">

 

[Skippy2K]

Hi, <br />well I use scart lead and still get invalidation msg's.<br />I think the uhf on the back is the output number for yer ** or video on the rf lead. Should not really affect your input ?

If you dont move your ariel then U R stuck with the multiplexes on that rig and wotever chan num they transmit on.

Perhaps you dislodged your downlead when fiddling around the back and improved yer signal a bit ??

I have a Phillips box and constantly get the validation msgs, they appear quite quick now also.<br />I think IT*D*** on getting cute <img src="frown.gif" border="0">

Skippy

 

[tabazan]

Hey anyone in the NORTH WEST area, should try putting the UHF to "67" & watch you signal strength bar go right across (GREEN).<br />This will improve the boxes performance - Trust me.

 

[mr_anfield]

Nice post "TABAZAN", at last someone who understands what im saying....the uhf is a major part in the reception on your box...just try it..

WEST YORKSHIRE TRY UHF 40....I get a good signal with that and i live in a vally!!!!

I would advise you to try going thru all the UHF numbers on your box, but remember to retune your set top box afterwords, as some channels ,youll have problems untill you do....

With this in mind, Ive still not had any "INVALID" errors on my display, or lock ups since i altered the UHF setting !!!!

 

[skcl]

The signal strength shown against a particular VHF number shows you the strength of that particular incoming multiplex. I believe there at least 6 of these incoming multiplexes. The number you put into the signal strength box is only for display, its used by O******al staff to diagnose any channel reception problems you may have. The only UHF setting that you can change to make any difference is the output channel number, which may be clashing with either one of the O******al multiplexes or a local analogue broadcast or your video.

Hope this helps.

 

[SteveR]

SKCL, Sorry mate, don't agree. I'm in south yorkshire, and when my UHF was set to 21, I couldn't get a thing. Now its on 45 and I have no probs what so ever. U can change the ouput frequency aswell(to the **), but to say it makes no difference on the incoming UHF is wrong.

 

[Rat]

Try UHF 34 if your in london/Essex area signal stregnth goes up to around #3 <img src="graemlins/dizzy.gif" border="0" alt="[dizzy]" />

 

[owenzy]

hi guys,<br />since i have a communal arial in my flat,( the landlord won't let me put up my own arial),i used a signal booster to up my signal strength into the green to @3.5, i scanned all uhf channels to get the best strengh cos on some frquences i got no picture at all ( even changing the ** input channel for i**dig using a standard coax lead prior to scart) and the best one i found for the glasgow area is channel No. 51. <img src="smile.gif" border="0">

 

[davidh]

liverpool north channel 55

 

[Mr-Maniac]

North-West London (Crystal Palace transmitter) - I found 25 and 29 as good options, ALTHOUGH, I must point out that there are other factors involved like how good is your antenna, the quality/reliability of the cable from the antenna to your box (ideally should be just one long cable) and I think the weather/wind...

But yes, this is a good topic to discuss I think, and the way I found out was by sitting for a couple of hours and trying different channels to see the strength and monitoring on different days.

However, I must admit, the STB I have (Philips) has been known to be crap anyway !

 

[Wheeler777]

i believe some of us are on the same wavelength here, we are talking about the uhf settings menu 7, 1 and anyone who says these dont affect your incoming signal, please try this link, you will have a few different mux channels to choose from, just choose the one that shows the best signal strength.

<a href="http://www.itc.org.uk/divisions/eng_div/digital_transx/index.asp" target="_blank">http://www.itc.org.uk/divisions/eng_div/digital_transx/index.asp</a>

W

 

[junger]

O.K.<br />I shall try to explain this. Stick with me.<br />YES the channel set (21-69) is the base RF frequency between the digital box and the T.V., however, the reason that the signal stregnth is inadvertently affected is possibly frequency contention. i.e. Video R.F.output frequency, or anything that produces a baseband. This term is called frequency confliction (that is why video recorders had to be ajusted on the introduction of s**) FREQUENCY CONTENTION CANCELLING EACH OTHER OUT. Got it <img src="smile.gif" border="0">

 

[junger]

Forgot to say.<br />Dependant on your area, the frequencies of the station output will change (Winter Hill BBC1 is 56) other areas are different for BBC1. That is why different areas show better stregnth results at differing frequency basebands (21-69).<br />OK<br /> <img src="smile.gif" border="0">

 

[Wheeler777]

so in easy to handle terms, the output frequency of the transmiter in your area, may be off a little from your box setting at 21 but bang on at 68. think like tuning a radio in.

are you saying junger, that it is the video in line with the stb that makes a difference, and not the, signal from the actual transmiter.

W

[ 01 December 2001: Message edited by: Wheeler777 ]</p>

 

[Tel boy]

There is NO way what so ever that changing the UHF channel number in Menu 7 – 1 will help reduce ECM’s.<br />Come on people use your brains.

Tel. <img src="rolleyes.gif" border="0">

& if by a very off chance it does “ I’ll show my Arse in Fenwicks window” <img src="biggrin.gif" border="0">

 

[Wheeler777]

well tel boy i don't think anyone would want to see that, but please could you tell me where i or anyone else has said it doe's improve things with ecm's, you will see if you read the thread starter, uhf, which says it all really, this thread is about improving the signal to your stb, making the dreaded red square, less of a problem, no one is saying it will stop ecm's, but it may well make sure it's a real ecm causing a problem and not just a bad signal. <img src="smile.gif" border="0"> <br />

W

 

[Pugsley]

I have changed my uhf to 60 & now get a ful green bar but no diff to pics. Mypics have always been ok(no red square) but pictures go a bit bloc** when watchin footy sometimes. Does anyone know the best signal output fom aerial in dBmv as I have a Wavetech & Promax digi ** meter to check em.<br />Btw those aerial boosters, I bought one which claims an increase of signal strenghth of 10dB...it actually increases it by 14dB.

Chef.

 

[junger]

Who mentioned ECM, s I did not.<br />This problem is all and only about ariel alignment.<br />If your digital signal is weak (and you cannot tell by the stregnth of the analogue signal because the digital signal is a 10th of the analogue stregnth) then your signal is vunerable to any electrical or atmopheric interference. Border line signal stregnths are no good. You can have one channel that is strong (Normally BBC ) whilst CH 5 is weak. This is because the power out from the transmitter is different. Ariel alignment is crutial where a signal is weak. Hope the helps. <img src="smile.gif" border="0">