[sdiy] Ensoniq ASR-X weirdness

[Dan Snazelle]

When I had an eps16+ I had to buy an old external scsci drive to put in the chain after the Iomega Zip drive 
This was purely to terminate the scsci as the hard-drive didn't even have much storage 

Sent from my iPhone

> On Dec 1, 2015, at 12:54 PM, Sarah Thompson <plodger at gmail.com> wrote:
> 
> You could ring out the lines and look for the resistance to ground. If termination is on, it should be relatively low. If it's off, then it would be a few k ohms. Some kinds of active termination may fake out your meter, however.
> 
> Another option would be to hook everything up as normal and fire it up and look at the signal with a good low capacitance scope probe, active preferably, and see whether the edges are nice and square or whether they are ringing. Ideally you'd want to use a fairly fast scope, but SCSI is fairly slow by modern standards.
> 
> Sarah
> 
>> On Dec 1, 2015, at 8:36 AM, Travis Thatcher <recompas at gmail.com> wrote:
>> 
>> Thanks Dave,
>> 
>> I wonder if there's an issue with the termination...I think Iomega Zip
>> drives are meant to work without mods with the ASR X however I'm
>> curious if the internal termination of the ASR is malfunctioning. It
>> is set to 'on' in the settings. Does anyone know how to actually
>> electrically test termination on a scsi chain?
>> 
>>> On Mon, Nov 30, 2015 at 8:25 PM, Dave Brown <davebr at earthlink.net> wrote:
>>> I don't know anything about ASR-X.  I have the EPS 16+.  What I do know on
>>> this version the SCSI bus attenuation power has to come from the drive which
>>> is very non-standard (in my experience).  I've yet to see a drive that
>>> enables this easily so on my drives I have to modify them to provide it (the
>>> drive provides the power to the EPS 16+ for termination in the synth).  I
>>> don't know if the ASR-X does this or not but it might be worth checking on
>>> the SCSI instructions.  Just a wild guess.
>>> 
>>> Dave
>>> 
>>>> -----Original Message-----
>>>> From: Synth-diy [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of
>>>> Travis Thatcher
>>>> Sent: Monday, November 30, 2015 3:06 PM
>>>> To: Synth DIY
>>>> Subject: [sdiy] Ensoniq ASR-X weirdness
>>>> 
>>>> Not necessarily synth DIY so apologies but I'm stumped on this one. I have
>>> an
>>>> ASR-X (the black one) that won't format Zip disks. It starts to format and
>>> then
>>>> stops at 1.1% every time. I've tried 2 different zip drives and many
>>> different
>>>> brand new discs with the same results every time. Tried at least 2
>>> different
>>>> scsi cables as well. Has anyone else experienced this? I unfortunately
>>> don't
>>>> have access to a scsi hard drive or another device to test stuff with. Any
>>>> suggestions would be greatly appreciated.
>> 
>> 
>> 
>> -- 
>> http://www.travisthatcher.com
>> http://www.soundcloud.com/thevoiceofsaturn
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