HELP!!! Connecting Spectruma (Leningrad) to a computer TV tuner?
ZXNet echo conference «hardware.zx»
Hello, All
Leningrad has finally gathered.
Many thanks to Ivan for the payment.
Everything works, but only when connected to an imported composite B&W TV
output to the AV input, but when I connect it to the computer TV tuner to the AV input, it doesn’t
he wants to show nothing.
Yes, and on TV the image is disgusting, gray and noisy, but the synchronization
stable, but there is nothing on the tuner at all, just a blue screen. :)
Is it possible to somehow connect Leningrad to a tuner without a PAL encoder?
For the first time, a black and white image will be fine, the main thing is that it’s normal
it was.
In any case, I’ll be assembling a PAL encoder, but for now I can’t wait to somehow
connect.
Please do not suggest damaging the monitor and TV. :) Love this
I'll work on it, I'll build the coder later anyway.
Can you also tell me which one is better to assemble and where is the best and fastest place to order the board?
Hello andrew76
and> Is it possible to somehow connect Leningrad to a tuner without a PAL encoder?
and>
You have a mess in your head. PAL it provides a color image rather than
image in general. A blue screen may be a consequence of:
1) misconfiguration of the software (connect the tuner to the TV, the TV as
signal source, and get a picture).
2) for some reason included in the antenna input instead of AV...
3) non-standard scan generated by Spectrum (correct quartz
is it worth the nominal value?) turns off the tuner. By the way, which one?
Pinnacles are the best (and not just tuners).
> Maybe you can also tell me which one is better to assemble and where the board is better and faster
> order?
Nodecoder (C) NEDOPC. Only the board obviously needs to be redeployed there...
Hello fk0
fk0> You have a mess in your head. PAL it provides a color image, not
fk0> image in general. A blue screen may be a consequence of:
fk0>
fk0> 1) non-configuration of the software (connect the tuner to the TV, TV in
fk0> as a signal source, and get a picture).
fk0>
fk0>
fk0> 2) for some reason included in the antenna input instead of AV...
fk0>
fk0>
fk0> 3) non-standard scan generated by Spectrum (quartz
Is fk0> the correct value?) disables the tuner. By the way, which one?
fk0> Pinnacle (and not only tuners) are best suited.
fk0>
fk0> Nodecoder (C) NEDOPC. Only the board obviously needs to be redeployed there...
Actually, I'm far from an idiot. And I know perfectly well why an encoder is needed.
Further point by point:
1. The tuner is 100% working, the software has nothing to do with it - the tuner is hardware, and there is a picture
from a video camera. So the tuner is fine.
2. See above, I connect correctly.
3. Frequencies correspond to 15625 and 50 Hz. Quartz 14 MHz, Spectrum board cut
in accordance with quartz.
Hardware tuner, AverMedia AverTV Box 5 Live.What can you say about the encoder on the MC1377?
Hello andrew76
and> Hardware tuner, AverMedia AverTV Box 5 Live.
and> What can you say about the encoder on the MC1377?
AverMedia is lousy for Spectrum. Verified.
The MC1377 does not separate chroma and luma signals. As a result, we have color
glitches on the fine black and white grid. Yes, practically, just black and white
spontaneously colors. Simply because in the spectrum of the brightness signal
there are frequencies close to the color subcarrier. Of course you can use a filter
try to cut. Everything will be blurry.
Why, if in NedoCoder the CXA2075 used separates brightness and color
(S-Video output)...
Hello andrew76
and> Is it possible to somehow connect Leningrad to a tuner without a PAL encoder?
It is possible, but the image will be black and white, Leningrad has a Video output, which
provides full b/w video signal. When connected to a tuner, the image
may be offset due to an incorrect level of mixed synchronization (so
was on my Scorpio), so you may have to adjust the amplitude
mixed sync pulses (I soldered a multi-turn potentiometer instead
constant resistor and adjusted), my tuner is Aver TVPhone98
Hello fk0
fk0> Nodecoder (C) NEDOPC. Only the board obviously needs to be redeployed there...
Kirill, you should visit my site at least once!
The fee was already redrawn almost a year ago :-).
Hello fk0
fk0> AverMedia - lousy for Spectrum. Verified.
fk0>
fk0> MC1377 does not separate chroma and luma signals. As a result we have
fk0> color glitches on a fine black and white grid. Yes, practically, simply
fk0> black and white color is spontaneously colored. Just because
fk0> the spectrum of the brightness signal contains frequencies close to color
fk0> subcarrier.
fk0>
I have such a problem if I choose the SECAM standard. I switch to PAL - and
no frills, normal b/w video.
AVerTVStudio, Pentagon-128/1991
Hello fk0
I don't have a coder. I assembled a b/w mixer from a diode and three resistors.
Sorry if the question involved connecting via a PAL encoder.
Hello Sonic
I have a question - what will be the output (see attachment)?
PCTV? or what?
File: smes_rgb.JPG http://zx.pk.ru/attachment.php?attachmentid=4223
Hello Sonic
Son> I don't have an encoder. I assembled a b/w mixer from a diode and three resistors.
Son> Sorry if the question included connecting via a PAL encoder.
That's right. Without an encoder, there are no system recognition signals in the video signal
color - the decoder turns off and does not decode anything at all.
Hello Sonic
Son> I have such a snag if I choose the SECAM standard. Switch to
Son> PAL - and no tricks, normal b/w video.
Son> AVerTVStudio, Pentagon-128/1991
This means you don’t understand the essence of the question, either you have the wrong encoder, or you
Indeed, the encoder does provide a filter, but then everything is quite blurred. And
SECAM has no side effects here - it is PAL/NTSC.
Hello John North
Joh> I have a question - what will be the output (see attachment)?
Joh> PCTV ? or what?
black and white composite.
Hello, Mikka_A
Mik> black and white composite.
and if you submit it to TV, to the PCTV input? Will the picture be black and white?
Hello, CHRV
CHR> Kirill, you should visit my site at least once!
CHR> The board was already redrawn almost a year ago :-).
Green? I don’t even know if this is good or bad. Here is Scorpio - after the start
The production of green boards has completely died out.
Hello John North
Joh> and if you send it to TV, to the PCTV input? will the picture be black and white?
It will be generally bad, because the output impedance of the whole thing should be 75 ohms
be.
Hello John North
Joh> I have a question - what will be the output (see attachment)?
Joh> PCTV ? or what?
The main thing in the word PCTV is PC. What does FULL COLOR mean?
Where did you see the color?
Hello, Mikka_A
Mik> black and white composite.
composite means mixed. The only question is what and with what.
Or do you have composite-48?
Hello fk0
fk0> Where did you see the color there?
R G B - aren't these colors?