Hi, Has any one got an idea what the typical phase noise specs are for the LO inside an ordinary analogue TV tuner is? Regards, Stephan.

Many many generations here... most all current ones are PLL

Current QAM-256 cable ready tuners in sets with digital ATSC/QAM

Synthesized tuners for analog NTSC TV didn't have to be very

On Sun, Jan 11, 2009 at 11:12:20PM +0200, Stephan Sandenbergh wrote: > Hi, > > Has any one got an idea what the typical phase noise specs are for the LO > inside an ordinary analogue TV tuner is? Many many generations here... most all current ones are PLL synthesized but obviously many variants of free running and varactor tuned exist in older TVs. Current QAM-256 cable ready tuners in sets with digital ATSC/QAM capability have to have respectable phase noise - I beleive there is a spec on what is recommended/expected but it is distinctly better than NTSC analog ever required. DOCSIS cable specs cover this... Synthesized tuners for analog NTSC TV didn't have to be very good and many obviously weren't... as low cost was paramount... -- Dave Emery N1PRE/AE, die@dieconsulting.com DIE Consulting, Weston, Mass 02493 "An empty zombie mind with a forlorn barely readable weatherbeaten 'For Rent' sign still vainly flapping outside on the weed encrusted pole - in celebration of what could have been, but wasn't and is not to be now either."