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<== Date ==> <== Thread ==>

Subject: Re: Re: VME-based arbitary function generator
From: Damjan Golob <damjan.golob@cosylab.com>
To: tech-talk@aps.anl.gov
Date: Fri, 12 Jan 2007 11:10:23 +0100
Dear Shifu,

our product line of embedded computers normally comes with Linux and EPICS support. More those informations are available on www.microIOC.com
We could provide you two options:
--
First would be microIOC with DAC analog output card with AFG (arbitrary function generator). Those microIOC with one or more PC104 DAC cards could fully replaces VME-4154.
Up to three cards could be installed into 19" 2U rack mountable case. Each card have 8 analog output channels with 12 bit resolution, output frequency 100kHz per channel 100 kHz. Additionally, the total memory capacity is 64k samples and can be variable divided among channels. The channels can be updated individually or simultaneously and their voltage can be bipolar (+/- 10V, ±5V) or unipolar (0-10V, 0-5V). By using 30Hz trigger, it can be outputted 33 ms long arbitrary waveform.
---
We also have experience with AWG (arbitrary waveform generator). We offer special AWG microIOC: the system use FPGA and waveforms are loaded compressed for fast transfers from system to digital generator . Links to the this AWG are  http://www.microioc.com/function_generator.htm
---

Regards, Damjan

Subject:
VME-based arbitary function generator
From:
Shifu Xu <xusf@aps.anl.gov>
Date:
Wed, 10 Jan 2007 13:11:55 -0600
To:
EPICS Tech-Talk <tech-talk@aps.anl.gov>
To:
EPICS Tech-Talk <tech-talk@aps.anl.gov>
CC:
Ned Arnold <nda@aps.anl.gov>

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





Subject:
Re: VME-based arbitary function generator
From:
Steven Hartman <hartman@fel.duke.edu>
Date:
Wed, 10 Jan 2007 14:43:19 -0500 (EST)
To:
Shifu Xu <xusf@aps.anl.gov>
To:
Shifu Xu <xusf@aps.anl.gov>
CC:
EPICS Tech-Talk <tech-talk@aps.anl.gov>, Ned Arnold <nda@aps.anl.gov>

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.
  



Subject:
RE: VME-based arbitary function generator
From:
"Chestnut, Ronald P." <ronc@slac.stanford.edu>
Date:
Wed, 10 Jan 2007 13:50:29 -0800
To:
"tech-talk" <tech-talk@aps.anl.gov>
To:
"tech-talk" <tech-talk@aps.anl.gov>

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:xusf@aps.anl.gov]
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


  


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