[sdiy] Ensoniq ASR-X weirdness

[BrightBoy]

See if you can track down an APS Sentry II SCSI terminator 
(or an APS SCSI enclosure that also has the same built-in/selectable
termination)

I also ran across this which might provide some clues:

http://www.chickensys.com/kb/eps-asr/004.html

Jeff

-----Original Message-----
>From: Dan Snazelle <subjectivity at hotmail.com>
>Sent: Dec 1, 2015 4:05 PM
>To: Sarah Thompson <plodger at gmail.com>
>Cc: Synth DIY <synth-diy at dropmix.xs4all.nl>
>Subject: Re: [sdiy] Ensoniq ASR-X weirdness
>
>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
>>> _______________________________________________
>>> Synth-diy mailing list
>>> Synth-diy at dropmix.xs4all.nl
>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy