Equipment to delay a RS422 connection

P

Peter Thomsen

Guest
Where can I find a piece of equipment that can delay a RS422
connection?
Ideally the delay should only work one way i.e. the Tx should be
delayed and the Rx should not be delayed. The delay should be
adjustable in the range 0-40 ms.

Thanks for any help.

Peter
 
"Peter Thomsen" <peter_thomsen@hotmail.com> wrote in message
news:f3e01ee.0312170431.5c6a8a86@posting.google.com...
Where can I find a piece of equipment that can delay a RS422
connection?
Ideally the delay should only work one way i.e. the Tx should be
delayed and the Rx should not be delayed. The delay should be
adjustable in the range 0-40 ms.

Thanks for any help.

Peter
Click to expand...
More Info Please?

Why are you delaying the signal and for what purpose?

Inquiring minds want to know...

Jay In AZ
 
In article <f3e01ee.0312170431.5c6a8a86@posting.google.com>,
peter_thomsen@hotmail.com (Peter Thomsen) wrote:

Where can I find a piece of equipment that can delay a RS422
connection?
Ideally the delay should only work one way i.e. the Tx should be
delayed and the Rx should not be delayed. The delay should be
adjustable in the range 0-40 ms.

Thanks for any help.

Peter
Click to expand...
Hmmm.. Me puzzled. Why???????
 
In article <alann19-C3BF7B.02471518122003@news.east.cox.net>,
Alan N <alann19@cox.net> writes:
In article <f3e01ee.0312170431.5c6a8a86@posting.google.com>,
peter_thomsen@hotmail.com (Peter Thomsen) wrote:

Where can I find a piece of equipment that can delay a RS422
connection?
Ideally the delay should only work one way i.e. the Tx should be
delayed and the Rx should not be delayed. The delay should be
adjustable in the range 0-40 ms.

Thanks for any help.

Peter

Hmmm.. Me puzzled. Why???????
Click to expand...
Indeed.
Setting the bitrate to 200bits/sec will give you a 40ms delay
for 8 bit characters. Higher bitrates will reduce this
proportionally. Of course, this will vary the throughput as
well as the transit delay, but without any clue why you want
to do this, I've no idea if that matters.

--
Andrew Gabriel
 
andrew@cucumber.demon.co.uk (Andrew Gabriel) wrote in message news:<brs0ja$s9b$2@new-usenet.uk.sun.com>...
In article <alann19-C3BF7B.02471518122003@news.east.cox.net>,
Alan N <alann19@cox.net> writes:
In article <f3e01ee.0312170431.5c6a8a86@posting.google.com>,
peter_thomsen@hotmail.com (Peter Thomsen) wrote:

Where can I find a piece of equipment that can delay a RS422
connection?
Ideally the delay should only work one way i.e. the Tx should be
delayed and the Rx should not be delayed. The delay should be
adjustable in the range 0-40 ms.

Thanks for any help.

Peter

Hmmm.. Me puzzled. Why???????

Indeed.
Setting the bitrate to 200bits/sec will give you a 40ms delay
for 8 bit characters. Higher bitrates will reduce this
proportionally. Of course, this will vary the throughput as
well as the transit delay, but without any clue why you want
to do this, I've no idea if that matters.
Yes, I know it is a rather strange requirement.
Click to expand...

The matter is to align the command sent to a video switcher, with the
play command send to a video server. This to make sure that the On-air
transition from one programme to the next takes place without spurious
pictures of one video frame.

What I forgot to mention is that bit rate is 19.2 kbit/s or 38.4
kbit/s

Still hoping for useful hints.
Peter
 
Peter Thomsen wrote:
Where can I find a piece of equipment that can delay a RS422
connection?
Ideally the delay should only work one way i.e. the Tx should be
delayed and the Rx should not be delayed. The delay should be
adjustable in the range 0-40 ms.
Click to expand...
I recall that circuit designers sometimes use a long piece of wire to
delay a signal a specific amount of time.

I don't recall the formula, but I wonder how long the wire would need to
be to delay the signal 40ms. I know that electricity travels through
wires much slower than the speed of light, but I still suspect it may be
too long. ;)

-Z
 
"Peter Thomsen" <peter_thomsen@hotmail.com> wrote in message
news:f3e01ee.0312190857.4f385af1@posting.google.com...
andrew@cucumber.demon.co.uk (Andrew Gabriel) wrote in message
news:<brs0ja$s9b$2@new-usenet.uk.sun.com>...
In article <alann19-C3BF7B.02471518122003@news.east.cox.net>,
Alan N <alann19@cox.net> writes:
In article <f3e01ee.0312170431.5c6a8a86@posting.google.com>,
peter_thomsen@hotmail.com (Peter Thomsen) wrote:

Where can I find a piece of equipment that can delay a RS422
connection?
Ideally the delay should only work one way i.e. the Tx should be
delayed and the Rx should not be delayed. The delay should be
adjustable in the range 0-40 ms.

Thanks for any help.

Peter

Hmmm.. Me puzzled. Why???????

Indeed.
Setting the bitrate to 200bits/sec will give you a 40ms delay
for 8 bit characters. Higher bitrates will reduce this
proportionally. Of course, this will vary the throughput as
well as the transit delay, but without any clue why you want
to do this, I've no idea if that matters.
Yes, I know it is a rather strange requirement.

The matter is to align the command sent to a video switcher, with the
play command send to a video server. This to make sure that the On-air
transition from one programme to the next takes place without spurious
pictures of one video frame.

What I forgot to mention is that bit rate is 19.2 kbit/s or 38.4
kbit/s

Still hoping for useful hints.
Peter
Click to expand...
Peter, try posting your question to news://sci.engr.television.broadcast
Someone there may be able to help.

Cameron:)
 
"Cameron Dorrough" <cdorrough@spamspamgormna.com.au> wrote in message news:<bs54gd$ro5$1@perki.connect.com.au>...
"Peter Thomsen" <peter_thomsen@hotmail.com> wrote in message
news:f3e01ee.0312190857.4f385af1@posting.google.com...
andrew@cucumber.demon.co.uk (Andrew Gabriel) wrote in message
news:<brs0ja$s9b$2@new-usenet.uk.sun.com>...
In article <alann19-C3BF7B.02471518122003@news.east.cox.net>,
Alan N <alann19@cox.net> writes:
In article <f3e01ee.0312170431.5c6a8a86@posting.google.com>,
peter_thomsen@hotmail.com (Peter Thomsen) wrote:

Where can I find a piece of equipment that can delay a RS422
connection?
Ideally the delay should only work one way i.e. the Tx should be
delayed and the Rx should not be delayed. The delay should be
adjustable in the range 0-40 ms.

Thanks for any help.

Peter

Hmmm.. Me puzzled. Why???????

Indeed.
Setting the bitrate to 200bits/sec will give you a 40ms delay
for 8 bit characters. Higher bitrates will reduce this
proportionally. Of course, this will vary the throughput as
well as the transit delay, but without any clue why you want
to do this, I've no idea if that matters.
Yes, I know it is a rather strange requirement.

The matter is to align the command sent to a video switcher, with the
play command send to a video server. This to make sure that the On-air
transition from one programme to the next takes place without spurious
pictures of one video frame.

What I forgot to mention is that bit rate is 19.2 kbit/s or 38.4
kbit/s

Still hoping for useful hints.
Peter

Peter, try posting your question to news://sci.engr.television.broadcast
Someone there may be able to help.

Cameron:)
Thanks I will do that right away - Peter
Click to expand...
 
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