Experimental Physics and
Industrial Control System

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Subject: VME-based arbitary function generator

From: Shifu Xu <[email protected]>

Date: Wed, 10 Jan 2007 13:11:55 -0600

To: EPICS Tech-Talk <[email protected]>

To: EPICS Tech-Talk <[email protected]>

CC: Ned Arnold <[email protected]>

Dear All,

The arbitary function generator VME-4145 we are using is discontinued and the replacement
is not available now. We could buy some  if you have more spare parts or have some parts lying
around.

Basically, the requirements for the arbitary function generator is as follows:
> 33 millisecond long programmable waveform triggered at 30 Hz
> bipolar output
> 10 usec time resolution (or better) (implies a memory length of > 3.3K)
> 1% amplitude resolution (or better) (e.g. 10-12 bits would be fine)

It would also be great if you could recommand some modules with EPICS device driver which can meet the above requirements.

Any answers and suggestions would be greatly appreciated.

Shifu Xu

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Subject: Re: VME-based arbitary function generator

From: Steven Hartman <[email protected]>

Date: Wed, 10 Jan 2007 14:43:19 -0500 (EST)

To: Shifu Xu <[email protected]>

To: Shifu Xu <[email protected]>

CC: EPICS Tech-Talk <[email protected]>, Ned Arnold <[email protected]>

On Wed, 10 Jan 2007, Shifu Xu wrote:

  

Basically, the requirements for the arbitary function generator is as
follows:
 > 33 millisecond long programmable waveform triggered at 30 Hz
 > bipolar output
 > 10 usec time resolution (or better) (implies a memory length of > 3.3K)
 > 1% amplitude resolution (or better) (e.g. 10-12 bits would be fine)
    

I'm using Joerger model VDACM waveform generators which I think meet your
requirements: 8 channels, 16-bit, +/- 10 V, memory for 32K points per
channel, 100 KHz clock. If you need better then 10 usec step size, they
also make a 100 MHz board in 12-bit but I haven't used that one.

See: http://www.joergerinc.com/VME.htm

I wrote EPICS software for the VDACM (VxWorks only at this point).

Let me know if you need more information.
  

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Subject: RE: VME-based arbitary function generator

From: "Chestnut, Ronald P." <[email protected]>

Date: Wed, 10 Jan 2007 13:50:29 -0800

To: "tech-talk" <[email protected]>

To: "tech-talk" <[email protected]>

Shifu,

We had a driver done by Richard Dabney at LANL (he's no longer there) for the Joerger VME AFG in 2003. If that is useful I can dig up the code (VxWorks only and Epics 13, not 14).

Ron Chestnut 


-----Original Message-----
From: Shifu Xu [mailto:[email protected]]
Sent: Wednesday, January 10, 2007 11:12 AM
To: EPICS Tech-Talk
Cc: Ned Arnold
Subject: VME-based arbitary function generator

Dear All,

The arbitary function generator VME-4145 we are using is discontinued and the replacement is not available now. We could buy some  if you have more spare parts or have some parts lying around.

Basically, the requirements for the arbitary function generator is as
follows:
 > 33 millisecond long programmable waveform triggered at 30 Hz  > bipolar output  > 10 usec time resolution (or better) (implies a memory length of > 3.3K)  > 1% amplitude resolution (or better) (e.g. 10-12 bits would be fine)

It would also be great if you could recommand some modules with EPICS device driver which can meet the above requirements.

Any answers and suggestions would be greatly appreciated.

Shifu Xu