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Author Topic: WC Sync... is this correct?  (Read 4436 times)

RecTeach

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WC Sync... is this correct?
« on: September 05, 2006, 03:23:41 AM »

This is how I have my rig sync'd right now.  Please tell me if this is correct.  

I am running my Lavry Blue A/D as the Master via WC.

Lavry Blue WC out > Digi 191 WC in - out > Digi 96 I/O WC in - out back up to the WC in of the Lavry Blue making a loop.  My question is does this loop need to be made or not?
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crm0922

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Re: WC Sync... is this correct?
« Reply #1 on: September 05, 2006, 08:40:00 AM »

Remove the loop.  You should go from master out to slave devices only, you may split the WC cable with a T if the internal connection on the device where you want the T is not internally terminated.

Make sure the software is set to accept external sync on the appropriate interfaces.

Chris
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Gunnar Hellquist

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Re: WC Sync... is this correct?
« Reply #2 on: September 05, 2006, 11:48:51 AM »

This is not the way I would do it. Instead, and according to WC specs, this is the cookbook way.

1) Lavry Blue Out
-- short cable --
2) T-connecter on Digi 192 WC In
-- short cable --
3) T-connector on Digi 96 In
-- Termination resistor

Note that the Digi 192 Out and Digi 96 Out are left unconnected.

The cables and termination resistor should be 75 Ohm.
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Gunnar Hellquist
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crm0922

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Re: WC Sync... is this correct?
« Reply #3 on: September 05, 2006, 02:02:25 PM »

Gunnar Hellquist wrote on Tue, 05 September 2006 11:48

This is not the way I would do it. Instead, and according to WC specs, this is the cookbook way.

1) Lavry Blue Out
-- short cable --
2) T-connecter on Digi 192 WC In
-- short cable --
3) T-connector on Digi 96 In
-- Termination resistor

Note that the Digi 192 Out and Digi 96 Out are left unconnected.

The cables and termination resistor should be 75 Ohm.



isn't that what I said... ?  I was assuming he knew the master device in question was already correct, but the wiring was wrong...

I did forget to mention that a termination resistor may be needed at the end of the chain.  Often devices have an internal termination in/out jumper.

Chris
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RecTeach

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Re: WC Sync... is this correct?
« Reply #4 on: September 05, 2006, 08:36:28 PM »

Ok so I took off the last cable that was going from the last 96 I/O back to the in of the Lavry making the loop.  So now it just stops at the in of the last 96 I/O.  Is this ok?  Does the 96 I/O self terminate?  I would assume that it does....

Thanks!
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crm0922

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Re: WC Sync... is this correct?
« Reply #5 on: September 05, 2006, 11:17:39 PM »

I don't know whether it does or not, the manual might tell you and Digi themselves could probably tell you.  It is probably best to check and make sure the lines that *aren't* T'd off with BNC Tees are internally terminated.

If they aren't, you can use a BNC Tee and a 75ohm BNC terminator
to terminate the line yourself.

Best of luck,

Chris
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Gunnar Hellquist

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Re: WC Sync... is this correct?
« Reply #6 on: September 06, 2006, 12:47:20 AM »

Sorry if we are talking past each other. Only trying to be helpful.

The point I am trying to make is that the OUT connectors on the slaves (96 and 192) are not involved. Nothing is to be connected there. Maybe this is is how you do it, but from your first writing I read it differently.

The reason for not using the OUT connector is that there is an awful lot of electronics between the IN and the OUT. And sending a WC thru all that electronics most probably does not improve it.

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Gunnar Hellquist
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