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Timecode wiring xlr->bnc

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dave

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Apr 26, 2004, 5:34:11 PM4/26/04
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Hi There people

Got a Pd-4 the other day, nice. All ship shape , no manual mind I dont
think there is a pdf version around either (shame). I guess I need to make
up a time code cable so I can get going. I dont know too much about
timecode so go easy on me. I have some bnc cable and have noticed the
connection on the pd4 is xlr. I will be testing things out with a dsr500
camera so I guess I will need to make a cable up xlr to bnc. If so I cant
seem to find wiring diagrams on the web , can anyone recommend a site or
give me a simple description. Any help much appreciated.
regards
dave briggs

Eric Toline

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Apr 26, 2004, 5:59:46 PM4/26/04
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Timecode wiring xlr-›bnc

Group: rec.arts.movies.production.sound Date: Mon, Apr 26, 2004, 10:34pm
(EDT+5) From: dh...@no.com (dave)

BNC center conductor to XLR pin 2. BNC shield to XLR pin 1.

Eric

Matt Mayer

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Apr 26, 2004, 8:12:58 PM4/26/04
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Eric Toline wrote:

I've experimented with it, Shield will work to either pin 1 or 3. "Y"
cables made by Abel Cinetech for the PD-4 to Aaton came with the ground
wired to 3. I thought this was strange so I played with it and the PD-4
TC jacks are wired to work either way.

---Matt

Jay Hartigan

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Apr 26, 2004, 8:29:50 PM4/26/04
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Another choice is these adapters. I carry a pair of these (one each sex) in
my PD-6 case.
http://www.markertek.com/SearchProduct.asp?item=HK%2D106M&off=0 They're
great!

Jay Hartigan


Eric Toline

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Apr 26, 2004, 9:53:08 PM4/26/04
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Re: Timecode wiring xlr-›bnc

Group: rec.arts.movies.production.sound Date: Mon, Apr 26, 2004, 8:29pm
From: j...@shootersinctakethisout.com (Jay Hartigan)

Really? How do you get them in the case? The link takes you to Bogen
Avenger light stands.

Eric

Brad Harper

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Apr 26, 2004, 10:13:19 PM4/26/04
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It took me to Hush Heels but I never could get mine to transmit timecode.

Brad

Glen Trew

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Apr 26, 2004, 10:44:50 PM4/26/04
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Since the PD-4 timecode output is balanced but non-transformer isolated, you
should not ground pin1 to pin3. Shorting 1 to 3 will short circuit one side
of the amplifier, increasing battery drain with no real benefit. This is in
the PD-4 users manual.

As Eric said, BNC center to pin 2, shield to pin 1, float pin 3.

Glen Trew


Fernando

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Apr 26, 2004, 10:46:35 PM4/26/04
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Not a man but a little setup codes table.
I print it very little and keep it on the PD-4's bag.
You have to do some text formatting and protect the print in some way.

Fostex PD-4 v2.40 SETUP CODES

104 PCT 00:30s, 03:3', 06:10', 07:20' Pause disengage
105 doF 00:AES/EBU, 01:S/Pdif Digital out format
106 Aid 00:man, 01:rec, 02:auto Automatic ID write
110 ETn 00:off, 01:all, 02:batt+tape Error tones
112 PHT 00:off, 03:3s, 09:9s Peak hold time
113 PSm 00:pause, 01:pause-stop Pause button
114 Lim 00:mic, 01:mic+line Limiter
116 rmm 00:off, 01:on Speaker rec mute
117 PEL 00:1%, 01:3%, 02:5% PCM error light
118 LmS 00:off, 01:on Conf. Mon. to XLR
119 bAL 00:10v, 01:10.5v, 02:11v… Battery alert Thd
201 AiL 00:-20/-30/-40, 03:-55dB Auto ID Thd level
202 AiT 00:.3/.6/.9/1.2s, 04:1.5s Auto ID snd dur
401 TCF 00:tape, 01:switch FrameRate playbk
403 STC 00:no, 01:yes TC out in pause
408 TCo 00:switch to GEN, 01:tape TC out pse source
411 ubd 00:Rymd, 01:dmyR, 04:user… Ubit modes
412 JAm 00:TC+Ub, 01:TC, 02:Ub JAM enable
801 mrS 01:setup reset reset to default

Fernando

Richard Crowley

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Apr 27, 2004, 9:54:17 AM4/27/04
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Is there an impedance difference betwen XLR (110 ohms?)
and BNC (75 or 50 ohms?) There are balun transformers
for exactly this kind of thing for AES/EBU digital audio.
Is TC on XLR different?


Fernando

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Apr 27, 2004, 10:56:12 AM4/27/04
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I use normal configuration for my jam cable (PD-4 to jam the slate)
pin 1 gnd, pin 2 hot, ignore pin 3 and do not short it to ground, as
said.

But for my TC wireless cables I use pin 3 of the TC PD-4's out to
shield of the wireless conector (so XLR3m pin 3 to shield and XLR3m
pin 2 to center conductor of the cable going to the transmitter)
I do it this way after a recomendation to avoid inducing RFI, sorry I
can't find the source and the original explanation now.

PD-4 TCout XLR3m pin3 ---> shield ---> shield of wireless connector
PD-4 TCout XLR3m pin2 ---> center conductor ---> hot pin of w. con.
PD-4 TCout XLR3m pin1 ---> unused

Fernando

Eric Toline

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Apr 27, 2004, 10:55:54 AM4/27/04
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Re: Timecode wiring xlr-›bnc

Group: rec.arts.movies.production.sound Date: Tue, Apr 27, 2004, 6:54am
(EDT-3) From: rcro...@xprt.net (Richard Crowley)

I really don't think it matters about impedences for tc. OTOH I'm not
sure if tc is analog or digital.

I've sent tc from my HHb P-dat through an xlr-f to all kinds of terminal
connectors with out a problem.

Eric

John B., Indianapolis

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Apr 27, 2004, 1:01:05 PM4/27/04
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Some time back I created a PD-4 setup chart and put it in PDF format for
printing out. You can download a copy from Coffey Sound's web site at:

www.coffeysound.com/gear_manuals/pd4setup.pdf

I folded my copy in half, laminated it, and carry it with the PD-4.

John Blankenship, Indianapolis

Wolf

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Apr 27, 2004, 2:46:29 PM4/27/04
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thi is confused info - stick with the factory recommendations
pin 3 is not a ground, its a balanced out opposite phase from pin2.

Fernando wrote:

--
NOTE I WAS ASSIGNED A NEW EMAIL ADDRESS:
wolfvid (replace this with the at sign) comcast.net

Dave Schaaf

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Apr 27, 2004, 3:52:01 PM4/27/04
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"John B., Indianapolis" wrote

>
> Some time back I created a PD-4 setup chart and put it in PDF format for
> printing out.

Is the most recent software version 2.41 ? And does your chart cover
it's details?

Dave Schaaf


John B., Indianapolis

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Apr 27, 2004, 6:01:37 PM4/27/04
to

As is listed at the bottom of the chart it was created for version 2.40.

What changes were made with version 2.41?

John B., Indianapolia

Fernando

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Apr 27, 2004, 9:33:43 PM4/27/04
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> thi is confused info - stick with the factory recommendations
> pin 3 is not a ground, its a balanced out opposite phase from pin2.

This is just info. I know what the pin3 carries on a balanced signal
line.
I found that recomendation in several places, I think Comtek is one of
them, and the manufacturer of my wireless TC link system too.
The goal was to avoid TC getting in to the headphones circuit.
I'll try to document my sources!
May be I was imprudent or careless... sorry if I was. I felt he was
needing a fast solution.

Fernando

Glen Trew

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Apr 27, 2004, 9:52:34 PM4/27/04
to
It will not matter. The output impedance is no doubt fairly low (600 Ohms or
lower), which is typically feed to a fairly high impedance input (10K Ohms
or higher).

Combine this with the fact that the typical cable run of a PD-4 DAT machine
timecode output is about 3 feet, and it is a non-issue.

GT

"Richard Crowley" <rcro...@xprt.net> wrote in message
news:108spga...@corp.supernews.com...

Glen Trew

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Apr 27, 2004, 9:58:14 PM4/27/04
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It's true that Comtek jumps pin 3 to pin 1 on their transmitter input XLR
cable (A few years ago they were jumping pin 2 to pin 1, so check before you
snip).

However, that scheme did not take into account the transformerless balanced
outputs of the PD-4 (and others, for that matter, including the Deva II).
The only thing you give up is a few dB of signal, and since TC is usually
very hot to begin with, I doubt it would ever be missed.

GT


"Fernando" <f...@ran.es> wrote in message
news:dcfabf52.04042...@posting.google.com...

Glen Trew

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Apr 27, 2004, 10:01:19 PM4/27/04
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The only difference I can recall at the moment is that PD-4 version 2.41
firmware added a setting that made the battery meter more meaningful when
using Lithium Ion NP-1s batteries.

Glen Trew

"John B., Indianapolis" <johntak...@indytakethisout.net> wrote in
message news:408ed8ea$0$46515$39ce...@news.twtelecom.net...

Jay Hartigan

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Apr 28, 2004, 6:14:12 AM4/28/04
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I don't know what the problem is. This link works for me every time.
Anyway, the part numbers are , HK-106M and HK-106F for these connectors. Go
to www.markertek.com and enter these part numbers if you can't make the link
work.

Jay


Fernando

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Apr 28, 2004, 10:53:31 AM4/28/04
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Hi, what I use is pin3 of the TC output as a (false) reference ground
for the signal going to transmitter, and not use the real ground
(pin1).
Fernando

Fernando

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Apr 28, 2004, 11:01:07 AM4/28/04
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I use BlackBoxVideo TC link. Great with a lithium battery (they last
for 20 days!)
The Ambient TC link is about the same. Both are 433,92MHz/10mW, enough
up to 100 meters.
(The link seem to be broken. Anyhow I preffer to solder my own
cables.)

Glen Trew

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Apr 30, 2004, 12:06:20 AM4/30/04
to
"Fernando" <f...@ran.es> wrote in message
news:dcfabf52.04042...@posting.google.com...
> Hi, what I use is pin3 of the TC output as a (false) reference ground
> for the signal going to transmitter, and not use the real ground
> (pin1).
> Fernando

That will work too, and without loosing any level. Since the transmitter is
not normally wired to anything else, the ground will remain floating.
However, if you power your recorder and the transmitter with the same power
source, then the grounds become shared and, viola, pin3 becomes shorted to
ground anyway.

While we're on the subject, the Deva II timecode output of very hot (4.4V
standard as I recall), which is sometimes too hot for transmitters (Comtek
and Ambient)typically used for timecode slates. Also, the Deva II timecode
output, like the Fostex, is transformerless balanced, thus should not have
pin3 shorted to ground. In most this case, floating pin 3 reduces the level
by 6dB which is usually enough to solve the level problem for the
transmitter.

Glen Trew

Fernando

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May 4, 2004, 1:26:23 PM5/4/04
to
"Glen Trew" <gl...@nixthistrewaudio.com> wrote in message news:

> "Fernando" <f...@ran.es> wrote in message news:
> > Hi, what I use is pin3 of the TC output as a (false) reference ground
> > for the signal going to transmitter, and not use the real ground
> > (pin1).
> > Fernando
>
> That will work too, and without loosing any level. Since the transmitter is
> not normally wired to anything else, the ground will remain floating.


Thank you very much Glen.

Fernando

Kurt Albershardt

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May 4, 2004, 4:32:33 PM5/4/04
to
Glen Trew wrote:
> "Fernando" <f...@ran.es> wrote in message
> news:dcfabf52.04042...@posting.google.com...
>
>> what I use is pin3 of the TC output as a (false) reference ground
>> for the signal going to transmitter, and not use the real ground
>> (pin1).
>> Fernando
>
>
> That will work too, and without loosing any level. Since the transmitter is
> not normally wired to anything else, the ground will remain floating.
> However, if you power your recorder and the transmitter with the same power
> source, then the grounds become shared and, viola, pin3 becomes shorted to
> ground anyway.

Unless, of course, your equipment utilizes fully isolated power supplies (a la Sound Devices and probably others.)

In fact, it would be nice to know which models/manufaturers are doing this as it becomes an issue in many interconnection scenarios.

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