what portable line in spdif out solution?

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need one battery powered to connect
Nomad Jukebox 3 to Shure FP24 mixer.

Line in (+4dBU preferred, but -10dBv ok)
S/PDIF out (optical preferred but can live with coaxial)

16bit 48KHz, battery operated.

..jukka
 
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J.A. <moc.otsamhir@nossredna.akkuj> wrote:
>need one battery powered to connect
>Nomad Jukebox 3 to Shure FP24 mixer.
>
>Line in (+4dBU preferred, but -10dBv ok)
>S/PDIF out (optical preferred but can live with coaxial)
>
>16bit 48KHz, battery operated.

Denecke AD-20 with the line level attenuator cables. Please see our Web
site for details.




--
Len Moskowitz PDAudio, Binaural Mics, Cables, DPA, M-Audio
Core Sound http://www.stealthmicrophones.com
Teaneck, New Jersey USA http://www.core-sound.com
moskowit@core-sound.com Tel: 201-801-0812, FAX: 201-801-0912
 
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"Len Moskowitz" <moskowit@panix.com> wrote in message
news:cj1mdb$oim$1@panix2.panix.com...
>
> J.A. <moc.otsamhir@nossredna.akkuj> wrote:
> >need one battery powered to connect
> >Nomad Jukebox 3 to Shure FP24 mixer.
> >
> >Line in (+4dBU preferred, but -10dBv ok)
> >S/PDIF out (optical preferred but can live with coaxial)
> >
> >16bit 48KHz, battery operated.
>
> Denecke AD-20 with the line level attenuator cables. Please see our Web
> site for details.
>
>

That should do the trick, but I feel little uncomfortable to use AD-20 with
external micpre.
is there option to skip micpre stage in AD-20?

..jukka
 
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In article <QiZ4d.316$nI.27@read3.inet.fi> moc.otsamhir@nossredna.akkuj writes:

> That should do the trick, but I feel little uncomfortable to use AD-20 with
> external micpre.
> is there option to skip micpre stage in AD-20?

The Deneke AD-20 IS a mic preamp. Skip your external mic preamp and
enjoy a nice compact box with a decent preamp and A/D converter.
Unless it isn't really appropriate for what you were looking for. I've
forgotten that by now.


--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo
 
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"Mike Rivers" <mrivers@d-and-d.com> wrote in message
news:znr1096055592k@trad...
>
> In article <QiZ4d.316$nI.27@read3.inet.fi> moc.otsamhir@nossredna.akkuj
writes:
>
> > That should do the trick, but I feel little uncomfortable to use AD-20
with
> > external micpre.
> > is there option to skip micpre stage in AD-20?
>
> The Deneke AD-20 IS a mic preamp. Skip your external mic preamp and
> enjoy a nice compact box with a decent preamp and A/D converter.
> Unless it isn't really appropriate for what you were looking for. I've
> forgotten that by now.
>
>

well I need external micpre for controlling and following levels.
also limiter is one thing and hi-pass another. again phantom 48v is needed
to feed my mics. all this is impossible with AD-20 directly. Shure FP24
does not provide mic level output and dont like to add att's no longer to
signal
chain. I already feed att'ed signal to DVCAM and AD-20 like solution comes
for
backup recorder that is currently Nomad Jukebox 3 with optical input. Except
I would get a lot better material with this backup setup that with Sony
PD170 in first
place even without external AD converter. But there is also other needs for
good external
AD converter.

Signal chain goes like this.:

mic 1 - shure FP24 Left ---- 50dB att cable --- PD-170 mic in
mic 2 - shure FP24 Right -- 50dB att cable --- PD-170 mic in
I I
I -------- AD-20 (?) --------- Nomad
Jukebox Optical in (slave sync)
I -------- AD-20 (?) --------- Nomad
Jukebox Optical in (slave sync)

FP24's balanced output goes to PD-170 and unbalanced monitor output to AD-20
like device and to
Nomad Jukebox 3.

Of course I could stick with Nomad Jukebox 3's AD converter but it isnt that
good and I need little gain
raise before hitting it. External AD box could be usable also with hiMD or
similar device which I plan to
get for this backup use. Dont know how AD's in those work out.

..jukka
 
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In article <wV35d.1$RU1.0@read3.inet.fi> moc.otsamhir@nossredna.akkuj writes:

> well I need external micpre for controlling and following levels.
> also limiter is one thing and hi-pass another. again phantom 48v is needed
> to feed my mics. all this is impossible with AD-20 directly. Shure FP24
> does not provide mic level output and dont like to add att's no longer to
> signal chain.

You're looking for a system solution and that means packaging things
so that they work for you. If you're trying to work with off-the-shelf
hardware, it often means that you end up with more than what you
dreamed about, or you may need more boxes than you'd like to use.

You're asking for the right thing, but it isn't common (or maybe
nobody at all makes it) because it's just not all that much in demand.

Since you have to go into a mic level input on the video camera, and
you want to use a signal source that works at line level, there's
nothing else you can do but attenuate its output. Chances are you'll
still be ahead of connecting a mic directly to the camera input
because the FP24's input stage is probably better than the camera's.

> Signal chain goes like this.:
>
> mic 1 - shure FP24 Left ---- 50dB att cable --- PD-170 mic in
> mic 2 - shure FP24 Right -- 50dB att cable --- PD-170 mic in
> I I
> I -------- AD-20 (?) --------- Nomad
> Jukebox Optical in (slave sync)
> I -------- AD-20 (?) --------- Nomad
> Jukebox Optical in (slave sync)
>
> FP24's balanced output goes to PD-170 and unbalanced monitor output to AD-20
> like device and to
> Nomad Jukebox 3.
>
> Of course I could stick with Nomad Jukebox 3's AD converter but it isnt that
> good and I need little gain
> raise before hitting it.

The Jukebox analog input isn't too bad. What IS bad is using it at mic
level. That's very noisy. Since you have two outputs from the FP24,
you already have a split. Connect it as you are, set the output level
so that you get a good recording level on the Jukebox with the
Jukebox set for Line Input and 0 dB gain. Whatever you do, don't turn
the gain on the Jukebox DOWN to accommodate a hot signal coming out of
the mixer. Then attenuate the main line level output of the mixer to
match up with the camera input.

Is the camera input balanced?


--
I'm really Mike Rivers (mrivers@d-and-d.com)
However, until the spam goes away or Hell freezes over,
lots of IP addresses are blocked from this system. If
you e-mail me and it bounces, use your secret decoder ring
and reach me here: double-m-eleven-double-zero at yahoo
 
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>
> Signal chain goes like this.:
>
> mic 1 - shure FP24 Left ---- 50dB att cable --- PD-170 mic in
> mic 2 - shure FP24 Right -- 50dB att cable --- PD-170 mic in
> I I
> I -------- AD-20 (?) --------- Nomad
> Jukebox Optical in (slave sync)
> I -------- AD-20 (?) --------- Nomad
> Jukebox Optical in (slave sync)

Core Sound makes a nifty box with decent preamps, P48, optical or coax
out. I measured 68 dB s/n below -12 dBFS in 16 bit mode with a -50 dBu
signal, 78 dB s/n with a -35 signal, .05% THD+N for 1k with -35 dBu signal
recorded to -12 dBFS, -2 dB points were 20 Hz, 20 kHz at 44.1 or 48k
sampling. It also does 24 bit and 96 kHz sampling with slightly better
specs.

It doesn't have line-level i/o, so that might be a disadvantage.

Now, why are you sending the PD170 -50 dB signal? It works much better at
-35 dBu with MIC ATT turned on, and better than that in LINE with a -10
dBV signal.

--
Correct address is spell out the letter j, AT dplaydahtcom
Clio- and Emmy-winning sound design
Learn audio for video at www.dplay.com
 
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"Jay Rose CAS" <SEE-SIGFILE@rcn.com> wrote in message
news:SEE-SIGFILE-2509042047560001@192.168.1.100...
>
> >
> > Signal chain goes like this.:
> >
> > mic 1 - shure FP24 Left ---- 50dB att cable --- PD-170 mic in
> > mic 2 - shure FP24 Right -- 50dB att cable --- PD-170 mic in
> > I I
> > I -------- AD-20 (?) --------- Nomad
> > Jukebox Optical in (slave sync)
> > I -------- AD-20 (?) --------- Nomad
> > Jukebox Optical in (slave sync)
>
> Core Sound makes a nifty box with decent preamps, P48, optical or coax
> out. I measured 68 dB s/n below -12 dBFS in 16 bit mode with a -50 dBu
> signal, 78 dB s/n with a -35 signal, .05% THD+N for 1k with -35 dBu signal
> recorded to -12 dBFS, -2 dB points were 20 Hz, 20 kHz at 44.1 or 48k
> sampling. It also does 24 bit and 96 kHz sampling with slightly better
> specs.
>
> It doesn't have line-level i/o, so that might be a disadvantage.
>
> Now, why are you sending the PD170 -50 dB signal? It works much better at
> -35 dBu with MIC ATT turned on, and better than that in LINE with a -10
> dBV signal.
>
> --
> Correct address is spell out the letter j, AT dplaydahtcom
> Clio- and Emmy-winning sound design
> Learn audio for video at www.dplay.com

I believe PD170 has fixed micpre that you need to use anyway. Just thought
to make
all ATT at same time in one place (cable) and not to feed it with -10dBV or
MIC ATT level but
MIC level that it seems to eat anyway (after integrated att's or more
att's).

What do you think about TAPE OUT quality of Shure FP24?
Too bad NJB3 recorder is somewhere between -10dBV and +4dBU but dont know
for sure
so my recordings seems to move around -6dB anyway even tried to give a hot
signal to it.

..jukka
 
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> I believe PD170 has fixed micpre that you need to use anyway. Just thought
> to make
> all ATT at same time in one place (cable) and not to feed it with -10dBV or
> MIC ATT level but
> MIC level that it seems to eat anyway (after integrated att's or more
> att's).

The circuit doesn't seem to work that way. By my measurements, it's a
variable resistor in the feedback loop... so giving it more signal will
lower distortion and noise.

Greg Winter, at the DV.com forums, has studied the schematics and come up
with mods. He's the expert.

--
Correct address is spell out the letter j, AT dplaydahtcom
Clio- and Emmy-winning sound design
Learn audio for video at www.dplay.com
 
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"Jay Rose CAS" <SEE-SIGFILE@rcn.com> wrote in message
news:SEE-SIGFILE-2609041413540001@192.168.1.100...
>
> > I believe PD170 has fixed micpre that you need to use anyway. Just
thought
> > to make
> > all ATT at same time in one place (cable) and not to feed it with -10dBV
or
> > MIC ATT level but
> > MIC level that it seems to eat anyway (after integrated att's or more
> > att's).
>
> The circuit doesn't seem to work that way. By my measurements, it's a
> variable resistor in the feedback loop... so giving it more signal will
> lower distortion and noise.
>
> Greg Winter, at the DV.com forums, has studied the schematics and come up
> with mods. He's the expert.
>
> --

Does this work in PD170 as well? I thought it was done for VX2000 or is
there any new?

I could also contact my engineer friend who would easily do that mod for
camera. But again
dont want to lose this good warranty we have hear inside EU area. I did not
even like to do
Shure FP24's Phantom 48v 10dB attention fix since I dont want to lose
warranty here.

..jukka
 
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