How to split
ZXNet echo conference «hardware.zx»
Hello, All
Dear iron workers. There's a problem.
How to split the sync mix into two separate signals: vertical and
horizontal scan?
Is this real? If yes, then please give me the diagram.
Hello axor
axo> Dear iron workers. There is a problem.
axo> How to divide the sync mixture into two separate signals: vertical and
axo> horizontal scan?
axo> Is this real? If yes, then please give me the diagram.
LM1881 - synchro separator.
Hello caro
axo> Dear iron workers. There is a problem.
axo> How to divide the sync mixture into two separate signals: vertical and
axo> horizontal scan?
axo> Is this real? If yes, then please give me the diagram.
Maybe it's easier to take it from the board?
Hello caro
car> Very often it is enough to extract a frame pulse from the synchronization mixture,
car> and use the synchro mixture itself as a lowercase one.
car> If this is so, then the scheme turns out to be quite simple.
car> For example, this is how it is done in the Secam encoder for "Quorum 128"
Thank you!
Hello fan
fan> Maybe it’s easier to take it from the board?
They are not there :(
Hello axor
axo> How to divide the sync mixture into two separate signals: vertical and
axo> horizontal scan?
axo> Is this real? If yes, then please give me the diagram.
Very often it is enough to isolate the frame pulse from the synchronization mixture,
and use the synchro mixture itself as a lowercase.
If this is so, then the scheme turns out to be quite simple.
For example, this is how it’s done in the Secam encoder for “Quorum 128”
File: Q128_SYN.png http://zx.pk.ru/attachment.php?attachmentid=4013
Hello axor
axo> They are not there:(
This can’t happen, composite synchronization from line and frame
going. Or am I wrong?
Hello spensor
spe> The Profi has a similar situation - a complex signal is received from the ROM
That is Is the signal generated by the program in ROM?
Hello Mike
Mik> That is. there is a signal generated by the program in ROM?
No :)
There 573RF2 is used as a PLM, in general there is no connection with the information
ROM.
Hello caro
car> you're wrong, of course, but for example in Quorum there is ULA (KB01-VG1), on
car> whose output contains only the complex signal /SYN.
The Profi has a similar situation - a complex signal from the ROM arrives and here, if not
cool, you have to resort to the tricks described above.
Hello Mike
Mik> This cannot be, composite synchronization from lowercase and
Mik> personnel is going. Or am I wrong?
You’re not wrong, of course, but for example, in Quorum there is ULA (KB01-VG1),
at the output of which there is only a complex signal /SYN.
So we have to extract the personnel impulse from it using an external circuit :)
Hello spensor
spe> Not:)
spe> There 573RF2 is used as a PLM, in general there is no connection with
spe> information ROM.
That is depending on the situation at the input, it produces a certain value on
exit, so what happens?
Hello spensor
spe> A similar situation occurs with the Pro - a complex signal from the ROM is received here
spe> no matter how you look at it, you have to resort to the tricks described above.
This is in the profiles of boards versions 3.x and 4.x. True, there is a free leg, on
which sometimes has a CS (apparently depends on the firmware)
Hello Mike
Mik> That is. depending on the situation at the input, they issue a certain
Mik> output value, so what happens?
yes, yes. there are signals from counters at the inputs, and signals at the output
synchronization, line feed, blank, int, border