Acorn BBC Micros

From: Allison J Parent <allisonp_at_world.std.com>
Date: Wed Nov 4 07:12:19 1998

< NTSC -- smooth and flaky

No, stand for Never The Same Color.
<
< UHF frequency bands: UHF frequency bands:
< channels 14-99? ?

UHF is 14-83, In the area west of Boston there are at least 30 uhf
channels in use and four are networks.

Cable deliver uses far more channels, but the extras are in the VHF range
from where Ch13 (VHF) leaves off to where 14 (uhf) begins.

< Satellite and cable TV bands: Satellite and cable TV bands:
< Too complicated for me to guess ?

The cable channles due to media used can use the frequencies that are
committed to VHF hi, and other communications bands.

Satellite use 4GHz and 12GHz bands with a limited number of channels in
teh lower of the two and a far greater amount in the high band.


<
< Stations identified by freq. Stations identified by semi-arbitrary name
< and call letters (e.g., BBC1, ITV, C5)

in the US a radio/TV station can be owned by anyone that can afford it
and meet the technical requirements. All stations regards less of service
are assigned a set of identifer call letters and a fewquency/channel
as appropriate.

< Loose network affiliations Tight network affiliations because of
< yet easy to find freqs. historical monopoly; difficult to

Actually for the major US networks (ABC, CBS, NBC, FOX, PBS...) network
coupling cane be very close.


< Devices attached to ch. 3 or 4 Devices attached to ch. 36?
< (whichever is unused) in past

Also there are RF devices that use high uhf (ch 67 and above) to avoid
local interference or conflicts with the common cable converter output
use.

< To keep this on the topic of the thread, I *am* interested in getting a
< I guess I'd need a PAL monitor and a 220-volt, 50-hz power supply to run
< though. Does anyone have any ideas?

One presumes you want it to take 60hz 115v to 220 50hz... be preapred to
pay dearly. There is no reason that 220V 60hz shouldn't work.

Allison
Received on Wed Nov 04 1998 - 07:12:19 GMT