Today our Technical Sales Manager Paul Barnes MSCTE shares his thoughts on what to look out for when aligning your satellite dish for IRS distribution.
“When aligning a dish do you peak it for signal power or signal quality? I used to always go for the highest power level however, for Sky Q I peak it at its best Quality Highest Noise/Link Margin value (depending which meter you are using). There are 73 transponders to choose from at 28.2° east for Sky UK and I’m currently using the following:
TP62 11038 V 22000 5/6 QPSK SD (Discovery) Astra 2G Europe
TP95 11553 H 22000 5/6 QPSK SD (Prime TV) Astra 2G Europe
TP101 11641 H 23000 2/3 8PSK HD (Virgin Sport HD) Astra 2G Europe
TS106 11224 V 23000 2/3 8PSK HD (NHK World HD) Astra 2G Europe
I’ve selected these as I have found them to be the most problematic. When I go to site I find good engineers pulling out their hair as they have 10dB MER and 5dB LM then after an amp and few switches they are down to 3dB or 2dB! The minimum level is at the outlet plate. So if you see 7.2 dB LM at the dish then re-peak to achieve 7.2dB LM or better using a combination of MER, and Pre-BER values to establish best LM quality at the dish.”