electro-music.com   Dedicated to experimental electro-acoustic
and electronic music
 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 
 Forum index » DIY Hardware and Software » YuSynth
CV Standard
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
Omega



Joined: Oct 11, 2010
Posts: 16
Location: Böblingen

PostPosted: Sun May 20, 2012 8:19 am    Post subject: CV Standard
Subject description: voltage differences
Reply with quote  Mark this post and the followings unread

Hello everyone,

I am just working with the CV Standard and have a question on the voltages, if these are correct enough.
What I've done so far was to select the 200K resistors. All 9 are between 199,64K and 199,68K. The 6 * 100K resistors are between 99,62K and 99,66K.
When I now measure the voltage at the 3 outputs there are still some differences. My question now is: are these differences o.k. or should I investigate more in the differences? Putting Semitones to 5 (= 0) and Octaves to 0 it was a bit difficult to adjust the voltage to nearly 0mV regarding the trimmer T24, T26 and T28. A small amount of turn will have a jump of about until 0,3 mV. So I tried to be as careful as I could be to adjust to 0mV +/- 0,2mV.
Now I put the Octave switches to 1V and I measure the voltages at the appropriate outputs. After that I select the other voltages. Here are the results:

Volts: 0
Out1: 0,12mV
Out2: 3,64mV
Out3: 0,07mV

Volts: 1
Out1: 0,9997V
Out2: 0,9998V
Out3: 0,9993V

Volts: 2
Out1: 1,998V
Out2: 2,000V
Out3: 1,999V

Volts: 3
Out1: 3,003V
Out2: 3,004V
Out3: 3,004V

Volts: 4
Out1: 4,004V
Out2: 4,004V
Out3: 4,005V

Volts: 5
Out1: 5,003V
Out2: 5,003V
Out3: 5,003V

Volts: 6
Out1: 6,004V
Out2: 6,003V
Out3: 6,004V

Volts: 7
Out1: 7,005V
Out2: 7,003V
Out3: 7,003V

Volts: 8
Out1: 8,004V
Out2: 8,001V
Out3: 8,002V

Volts: 9
Out1: 9,005V
Out2: 9,002V
Out3: 9,003V

Volts: 10
Out1: 10,006V
Out2: 10,001V
Out3: 10,002V

maybe someone can tell me, if these values are o.k. This would be very nice.

Many thanks in advance


Bernhard
Back to top
View user's profile Send private message Visit poster's website
yusynth



Joined: Nov 24, 2005
Posts: 1314
Location: France

PostPosted: Sun May 20, 2012 1:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yes they are very good, the maximum error is less than 0.3% which is excellent.

the worst case (3mV) is roughly 4 cents of a semi-tone.

_________________
Yves
Back to top
View user's profile Send private message Visit poster's website
Omega



Joined: Oct 11, 2010
Posts: 16
Location: Böblingen

PostPosted: Sun May 20, 2012 8:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thank you very much for the fast reply, Yves. So I am happy with my measurements. Very Happy
_________________
Cheers

Bernhard
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [3 Posts]
View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » YuSynth
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use