UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

winston_1 · 2nd Sep 2018, 10:55 am

You will find most modern flat screen TVs (except Panasonic) will tune all these channels in analogue mode.

Superband and hyperband were also (still are for digital) used by UK cable companies but the channel allocations were different. In the UK vision frequencies were exact multiples of 8, eg 120, 128, 136, etc up to 472. These were known as HRC channels (can't remember what it stood for). But by doing this all channels could be locked together using harmonics of a master 8MHz oscillator. Any spurious beats between carriers on the system then appear exactly under another carrier and so are less visible.

2nd Sep 2018, 10:55 am	#12
winston_1 Hexode Join Date: Oct 2012 Location: London, UK. Posts: 498	Re: Unknown Frequency Settings On Modulator You will find most modern flat screen TVs (except Panasonic) will tune all these channels in analogue mode. Superband and hyperband were also (still are for digital) used by UK cable companies but the channel allocations were different. In the UK vision frequencies were exact multiples of 8, eg 120, 128, 136, etc up to 472. These were known as HRC channels (can't remember what it stood for). But by doing this all channels could be locked together using harmonics of a master 8MHz oscillator. Any spurious beats between carriers on the system then appear exactly under another carrier and so are less visible.