I Miss my Viewfinder !

In article , Mxsmanic
wrote:

Whisky-dave writes:

So no one has a digital TV, or are you saying it's all just
advertising or marketing.

All display technologies are analog.

All Huh?

A single counter example makes your statement false?

OK, here goes. I have a purely digital display in my living room. The
first analog component in the display system is my eyes.

It's a projector TV with a TI DLP device. The mirrors are flicked with
digital signals. The flicks are timed; no analog technology, just
digital counters. The colour wheel carries no signal information. The
light source is constant, so no signal there either.

There is not a single analog component in the signal path all the way
from the antenna to the screen.

I'm not sure how LCD TVs work. If the light transmission is digitally
clocked as I suspect it is, then they too are purely digital devices.

So maybe we can say "nearly all display technologies made in the last
few years are purely digital"

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In article , Mxsmanic
wrote:

Elliott Roper writes:

OK, here goes. I have a purely digital display in my living room. The
first analog component in the display system is my eyes.

It's a projector TV with a TI DLP device. The mirrors are flicked with
digital signals. The flicks are timed; no analog technology, just
digital counters. The colour wheel carries no signal information. The
light source is constant, so no signal there either.

There is not a single analog component in the signal path all the way
from the antenna to the screen.

I guess you don't design DLP devices for a living.

OK, you tell me where the analog components are.

I'm not sure how LCD TVs work.

I agree.
You are right. LCD's vary their brightness as an analog of voltage
applied to twist the polarisation. Now go away and read how DLP's work.
I'm right about them.

Timers, by the way, are analog devices.

Timers are digital. The last analog timer was a sand hourglass. Go
away and observe a mechanical clock ticking and come back when you have
a clue by four.

You have got your tiny mind in a rut where you insist any physical
device is analog. That is pure drivelling malarkey. Timers in
everything are counters, Counting is a digital operation. There is no
sense it being an analog of anything." Since 1967, the second has been
defined to be the duration of 9,192,631,770 periods of the radiation
corresponding to the transition between the two hyperfine levels of the
ground state of the caesium-133 atom." [1]

I'm typing this on a digital computer, where the only analog components
are the very first and last stages of audio i/o - a microphone being
shaken by sound pressure and a tinny little speaker being shaken by the
output of a D/A converter and a mickey mouse amplifier, and I now
reluctantly admit, the LCD pixels on the display.

1. Unashamedly lifted from http://en.wikipedia.org/wiki/Second

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To de-mung my e-mail address:- fsnospam$elliott$$
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Elliott Roper wrote:
In article , Mxsmanic
wrote:

Elliott Roper writes:

OK, here goes. I have a purely digital display in my living room. The
first analog component in the display system is my eyes.

It's a projector TV with a TI DLP device. The mirrors are flicked with
digital signals. The flicks are timed; no analog technology, just
digital counters. The colour wheel carries no signal information. The
light source is constant, so no signal there either.

There is not a single analog component in the signal path all the way
from the antenna to the screen.

I guess you don't design DLP devices for a living.

OK, you tell me where the analog components are.

The entire RF portion is purely analog with the exception
of any control circuitry, which may or may not be digital.


I'm not sure how LCD TVs work.

I agree.
You are right. LCD's vary their brightness as an analog of voltage
applied to twist the polarisation. Now go away and read how DLP's work.
I'm right about them.

Timers, by the way, are analog devices.

Timers are digital. The last analog timer was a sand hourglass. Go
away and observe a mechanical clock ticking and come back when you have
a clue by four.

Heh heh, most mechanical clocks are digital devices, and
have been for many decades! The display is pseudo
analog, but most of the gears, and the clock's hands,
move in discrete increments. There's a little device in
there called a "governor" I think, that is in fact a
mechanical analog to digital converter. The drive
spring or motor is analog, but the timing accuracy of
the clock is accomplished with that ADC.

You have got your tiny mind in a rut where you insist any physical
device is analog. That is pure drivelling malarkey. Timers in
everything are counters, Counting is a digital operation.

That is virtually true, but not exactly. There are
still many timers that just us an RC circuit and a very
simple comparitor. No count at all, just wait for the
voltage to rise to a given level. That, however, does
not detract from the logic of you comments directed at
what mxsmanic has said.

--
Floyd L. Davidson http://www.apaflo.com/floyd_davidson
Ukpeagvik (Barrow, Alaska)

On Fri, 24 Jun 2011 20:29:53 +0200, Mxsmanic
wrote:

Elliott Roper writes:

OK, here goes. I have a purely digital display in my living room. The
first analog component in the display system is my eyes.

It's a projector TV with a TI DLP device. The mirrors are flicked with
digital signals. The flicks are timed; no analog technology, just
digital counters. The colour wheel carries no signal information. The
light source is constant, so no signal there either.

There is not a single analog component in the signal path all the way
from the antenna to the screen.

I guess you don't design DLP devices for a living.

I'm not sure how LCD TVs work.

I agree.

Timers, by the way, are analog devices.

Not if they work by counting pulses.

Regards,

Eric Stevens

Mxsmanic wrote:
Eric Stevens writes:

Not if they work by counting pulses.

The pulses are always generated by analog mechanisms, such as mechanical or
electronic oscillators.

Which irrelevant.

--
Floyd L. Davidson http://www.apaflo.com/floyd_davidson
Ukpeagvik (Barrow, Alaska)