QUOTE(wongsf @ Nov 8 2010, 01:10 PM)
KU-band lnb(low noise block) got 2 lo(local oscillator ) frequencies: 9.75 GHz and 10.6 GHz, of which can be switched by 22KHz signalSD channels is using 9.75GHz frequency, while HD channels is allocated by higher 10.6GHz
astro max got 2 tuners inside feed by internal splitter, it can share single lnb because it only uses 9.75GHz lo frequency for SD channels reception
for byond pvr, 2 tuners have to be operated independently so can not share single lnb
imagine if a single lnb is share by byond pvr twin tuner, tuner 1 is watching SD channel, when tuner 2 is recording HD channel, tuner 2 will send 22KHz signal to switch LNB to 10.6GHz, this action will result in tuner 1 unable to receive SD channel, thus create interference for SD reception
This post has been edited by neb: Nov 8 2010, 02:11 PM
Nov 8 2010, 02:10 PM

Quote
0.0550sec
1.14
7 queries
GZIP Disabled