Anetenna loop cable

[joysleep1]

Hi
I need to buy an antenna loop cable for my cable tuners but there are so many different types
I saw one that says

75dB Premium Antenna Cable - Black
85dB Premium Antenna Cable - Black
90dB Premium Antenna Cable - Black

What is the difference between the db and which one shall i go for?

[adm]

Hi
I need to buy an antenna loop cable for my cable tuners but there are so many different types
I saw one that says

75dB Premium Antenna Cable - Black
85dB Premium Antenna Cable - Black
90dB Premium Antenna Cable - Black

What is the difference between the db and which one shall i go for?

If they are the attenuation figures then none of them. A good quality cable attenuation is 18dB at terrestrial TV frequencies and 33dB at satellite frequencies. And, this is for a cable of 100 metres of cable so a loop trough cable of say 0.5m would be 0.09dB and 0.17dB respectively.

I would suggest the site that you are looking at possibly specialises in Bull S*** type specification figures.

Assuming you mean the cable to connect the output of one cable tuner to the input of another cable tuner....
Are you sure that your box doesn't have an menu option for internal loop through?

otherwise something like

http://www.ebay.co.uk/itm/F-TYPE-PLUG-TV-COAX-SKY-SATELLITE-VIRGIN-CONNECTOR-CABLE-LEAD-SHORT-16CM-160MM-/190882899141?hash=item2c7181e4c5:g:lx4AAOSw9N1VxHj3

which has F plugs so you will also need male and femail adapters for a Enigma2 box cable tuner

http://www.ebay.co.uk/itm/F-Socket-Adaptor-to-Male-Female-Coax-Adaptors-F-plug-/351052073150?hash=item51bc5588be:g:~hQAAMXQ4YtSL1Wt

Ebay sellers also have short leads with coax plugs at both ends and they come with a gender bender adapter which, in my experience, can be rather less reliable for a tight fit.

http://www.ebay.co.uk/itm/0-5M-TV-RF-Digital-Aerial-Coax-Coaxial-Fly-Lead-Cable-with-Coupler-50CM-Short-/381294833700?hash=item58c6f17024:g:MngAAOSweW5VfWpm

The sellers of this latter type lead don't specify the type of cable used. Ideally the cable for digital TV should be 100% copper screened.

[joysleep1]

If they are the attenuation figures then none of them. A good quality cable attenuation is 18dB at terrestrial TV frequencies and 33dB at satellite frequencies. And, this is for a cable of 100 metres of cable so a loop trough cable of say 0.5m would be 0.09dB and 0.17dB respectively.

I would suggest the site that you are looking at possibly specialises in Bull S*** type specification figures.

Assuming you mean the cable to connect the output of one cable tuner to the input of another cable tuner....
Are you sure that your box doesn't have an menu option for internal loop through?

otherwise something like

http://www.ebay.co.uk/itm/F-TYPE-PLUG-TV-COAX-SKY-SATELLITE-VIRGIN-CONNECTOR-CABLE-LEAD-SHORT-16CM-160MM-/190882899141?hash=item2c7181e4c5:g:lx4AAOSw9N1VxHj3

which has F plugs so you will also need male and femail adapters for a Enigma2 box cable tuner

http://www.ebay.co.uk/itm/F-Socket-Adaptor-to-Male-Female-Coax-Adaptors-F-plug-/351052073150?hash=item51bc5588be:g:~hQAAMXQ4YtSL1Wt

Ebay sellers also have short leads with coax plugs at both ends and they come with a gender bender adapter which, in my experience, can be rather less reliable for a tight fit.

http://www.ebay.co.uk/itm/0-5M-TV-RF-Digital-Aerial-Coax-Coaxial-Fly-Lead-Cable-with-Coupler-50CM-Short-/381294833700?hash=item58c6f17024:g:MngAAOSweW5VfWpm

The sellers of this latter type lead don't specify the type of cable used. Ideally the cable for digital TV should be 100% copper screened.

Hi
No it is just a loop cable from one cable tuner to another. But like i said what is the difference between those figures?

[joysleep1]

If they are the attenuation figures then none of them. A good quality cable attenuation is 18dB at terrestrial TV frequencies and 33dB at satellite frequencies. And, this is for a cable of 100 metres of cable so a loop trough cable of say 0.5m would be 0.09dB and 0.17dB respectively.

I would suggest the site that you are looking at possibly specialises in Bull S*** type specification figures.

Assuming you mean the cable to connect the output of one cable tuner to the input of another cable tuner....
Are you sure that your box doesn't have an menu option for internal loop through?

otherwise something like

http://www.ebay.co.uk/itm/F-TYPE-PLUG-TV-COAX-SKY-SATELLITE-VIRGIN-CONNECTOR-CABLE-LEAD-SHORT-16CM-160MM-/190882899141?hash=item2c7181e4c5:g:lx4AAOSw9N1VxHj3

which has F plugs so you will also need male and femail adapters for a Enigma2 box cable tuner

http://www.ebay.co.uk/itm/F-Socket-Adaptor-to-Male-Female-Coax-Adaptors-F-plug-/351052073150?hash=item51bc5588be:g:~hQAAMXQ4YtSL1Wt

Ebay sellers also have short leads with coax plugs at both ends and they come with a gender bender adapter which, in my experience, can be rather less reliable for a tight fit.

http://www.ebay.co.uk/itm/0-5M-TV-RF-Digital-Aerial-Coax-Coaxial-Fly-Lead-Cable-with-Coupler-50CM-Short-/381294833700?hash=item58c6f17024:g:MngAAOSweW5VfWpm

The sellers of this latter type lead don't specify the type of cable used. Ideally the cable for digital TV should be 100% copper screened.

I have the xtrend 10000. So i want to loop tuner B to tuner C

[DaMacFunkin]

It's just bumpf to try and tell you one is higher quality than the other.
I presume one is ariel grade, one is satellite grade and one is cable grade, leads for cable needs to be a higher specification than the other 2 as pointed out by adm.

[adm]

Hi
No it is just a loop cable from one cable tuner to another. But like i said what is the difference between those figures?

They are completely meaningless with regards a loop cable but

75db the signal out of the cable is 0.00018 of the signal that entered the cable
85db the signal out of the cable is 0.000056 of the signal that entered the cable
95db the signal out of the cable is 0.000018 of the signal that entered the cable

It may be that you have found completely the wrong thing. What is the address of the web site?

A decibel (dB) figure for a cable usually indicates the attenuation per unit length of usually 100 meters for aerial/satellite cable (which is the same type of cable used to loop tuners). With those figures - what enters the cable never comes out, but the lower the figure the better. A loop through cable should be close to 0dB. Those figures are so high that it cannot be an attenuation figure.


Perhaps its a signal to noise figure but I completely fail to see how a piece of wire can be specified in this way as a cable cannot generate its own signal!

Perhaps its a rejection of interference figure but at what test frequency? In this case the higher figure would be better. Something cost a couple of quid on Ebay is likely to have similar figures at cable TV frequencies.

Without further information on what the figures refer to its all guesswork. Does the site give any more of a description. A more meaningful description would list the cable/wire type WF100, CT100, PF100, RG6, RG65 or maybe something such as double screened, 100% copper screened and etc .

The use of the word antenna in this context suggests its a USA site of something to do with RF transmitters/receivers rather than TV set top boxes.

[adm]

It's just bumpf to try and tell you one is higher quality than the other.
I presume one is ariel grade, one is satellite grade and one is cable grade, leads for cable needs to be a higher specification than the other 2 as pointed out by adm.

These days with digital terrestrial TV ideally you would use the same type of WF100/CT100 type cable as used for satellite for every application (aerial lead, fly leads, loop leads). You can still buy around 3 different commonly available 'quality' of cable but those dB figures quoted in the original post are completely meaningless unless they a put into context and not representative of what is commonly available. For a very short loop cable anything with a characteristic impedance of 75ohms and is fully screened is adequate.

[adm]

I have the xtrend 10000. So i want to loop tuner B to tuner C

Try

Menu -> System -> service searching -> tuner configuration -> tuner C -> configuration mode = 'loop through to' and in the next line Connected to = tuner B