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SIGNAL AMPLIFIER
- Thread starter garbai
- Start date
Hello, I am interested to Buy this unit, please send technical specification with Pictures,
With Regards,
Masroor
[email protected]
With Regards,
Masroor
[email protected]
boxerman23
Well Known Member
- Messages
- 1,470
If you want a device to enable you to have a very long run of cable from your dish to stb ( more than 50m for example) it is possible to put a repeater in line, If you were wanting to just increase the signal level of your dish i do not know of anything on the market, the problem being if you amplify the signal,you amplify the crap with it, therefore you dont have a gain, only solution, bigger dish
boxerman23
Well Known Member
- Messages
- 1,470
I thought I could have a device that could filter the signal from the noise and amplify the signal. But how does the repeater actually works?
(Hi boxerman23 I saw your thread on another forum concerning focal distance on prime focus dishes. Have a look at this. Maybe it could be useful).
How it works i dont know, i used them when i was installing systems on high rise buildings when the distribution board was located in basement, this was some 10years ago, I will have a look and see if i have an old cataloger which may have tech spec for you. Many thanks for the link to the sat focus thread, really appreciate it.
westonesat
Senior Member
- Messages
- 145
i had problems with weak signals from some sats a at my location, i inserted an in-line amplifier, and this certainly made a difference to the signal being received.no doubt this amplifies the noise as well, but not to a detrimental effect in my case with a 18 mtr run.
boxerman23
Well Known Member
- Messages
- 1,470
Hope this helps garbai
http://www2.gme.net.au/matv/distribution_amps.php
have a look at sat42 and sat42d items these will give you an idea of what a sat amp can do, however i have found this one http://www.mcmelectronics.com/product/DISTRIBUTED-BY-MCM-4662A-/33-8645 and this will give you +20db of signal gain but remember it also increases the crap as well
best
http://www2.gme.net.au/matv/distribution_amps.php
have a look at sat42 and sat42d items these will give you an idea of what a sat amp can do, however i have found this one http://www.mcmelectronics.com/product/DISTRIBUTED-BY-MCM-4662A-/33-8645 and this will give you +20db of signal gain but remember it also increases the crap as well
best
Last edited:
boxerman23
Well Known Member
- Messages
- 1,470
Hi boxerman23
Many thanks for the links. Probably the In-line amplifier will perform better when placed next to the receiver than next to the LNB. Or what do you think? Thanks again.
It is designed to increase signal strength on long cable runs, so yes nearer to stb than lnb
Best
It is designed to increase signal strength on long cable runs, so yes nearer to stb than lnb
Best
I would think otherwise....because by the time the signal arrives near the Stb it would already have fallen off quite a bit (with increase to noise levelas well )especially if the cable run is quite long, so I would recomend to place it just after the LNB. Now these in-line amp favour a certain part of the Bandwidth and can therefore amplify certain channels whilst degrading others,especially if they have a strong signal, so it all depends what frequencies they prefare.
boxerman23
Well Known Member
- Messages
- 1,470
I agree and disagree, firstly Fitting an amplifier when it is not needed may actually degrade the overall noise performance of the system. also as it requires voltage from the cable, attaching it more than one third of the cable total distance from the stb is likely to compromise the lnb function because of the additional voltage drop on the long cable run, but ultimately the best answer is to use a larger dish where possible a lnb with very high gain and the best possible cable. and of course as you rightly said alfred 1 higher frequency will gain signal and lower frequency will lose signal when using an amp. So there is arguments for and against use of signal amps and its possible benefits
Best
Best
westonesat
Senior Member
- Messages
- 145
in my experience it seems to be a case of nearer the lnb the better, i agree with previous comments of high and low frequency gain an loss. i also fitted lower db lnb and found that this made a considerable gain in signal at my location.
I agree and disagree, firstly Fitting an amplifier when it is not needed may actually degrade the overall noise performance of the system. also as it requires voltage from the cable, attaching it more than one third of the cable total distance from the stb is likely to compromise the lnb function because of the additional voltage drop on the long cable run, but ultimately the best answer is to use a larger dish where possible a lnb with very high gain and the best possible cable. and of course as you rightly said alfred 1 higher frequency will gain signal and lower frequency will lose signal when using an amp. So there is arguments for and against use of signal amps and its possible benefits
Best
I agree as to having a larger Dish with a better to noise level Lnb (say in the region off 0.2 or 0.1DB), but I don't think that an 'in-line amp' will cause any voltage drop as long as these are 'passive' amps (they only incorporate 'tuned circuits' with no resisitive or transistor hardware)so they shouldn't compromise the Lnb 'need of full Voltage' but anway the way forward is to have a larger Dish.