Doepfer

hello tim,
so, the a185 cannot be used as a simple cv buffer
module(like the AS rs230) ?
does the a185 has to always buffer and "write" from
it's input to the buss board, or read the signals of
the buss board and buffer them to it's outputs?
can't anyone input a cv and/or gate singal to the
a185's inputs and get this signal buffered from the
a185's outputs (without these signals interfering with
the bussboard)?
i mean, does the a185 has to be connected to the
bussboard in one way or another?
bakis.






--- Tim Stinchcombe
<timothy@tstinchcombe.freeserve.co.uk> wrote:

> 
> Hi Heinz,
> 
> > i have a question regarding the A-185 module (bus
> access). what
> > exactly must i do to get it into 'read only' mode?
> 
> > according to the manual it depends on a jumper,
> but the module 
> sports
> > two jumpers and there are no detailed instructions
> as to how to
> > proceed (i'm unfortunately completely
> unknowledgeable w.r.t. 
> electronics).
> > i want to mount the module in a frame that already
> HAS one A-185
> > mounted in it (i want additional CV and gate
> outputs on that frame)
> > and apparently this doesn't work when both are in
> read/write mode. 
> 
> The manual does seem a little confusing, but I think
> most of the 
> information is there. Each section of the 185 (one
> for 'CV', the 
> other for 'gate') consists of a 'buffer' (or
> 'refresh amplifier' in 
> the manual) connected between the 'in' and 'out'.
> The jumpers control 
> whether the internal bus bar is connected to the in
> or out. In the 
> factory setting (with the jumper in the position of
> the thick line on 
> the PCB), the system bus is connected to the output,
> as Fig 1 shows. 
> Hence feed CV and gate signals from the 'master' to
> the inputs: this 
> then goes to the bus bar to which the A-185 is
> connected, *and also* 
> to the output sockets, so another A-185 on another
> bus bar can 
> be 'daisy-chained', as Fig 2 shows.
> 
> If you swap the jumpers to the other position (for
> 'read mode'), the 
> system bus is connected to the inputs of the
> buffers, and hence the 
> buffered signals are avaliable at the outputs, this
> is Fig 3 (and 
> note that the diagram is a little incomplete: the
> input now *is* the 
> system bus, and so the statement immediately above
> it isn't correct!).
> 
> If you are solely using Doepfer modules, there
> should be no need for 
> the read mode, as the manual says, as if you think
> you need to read 
> what is on the bus, you should be able to take it
> from what put in 
> there (either an A-185 or A-190, as Fig 2 shows).
> However if you have 
> a different module writing signals to the bus, and
> that is why you 
> need to read it using an A-185, then Doepfer have
> taken the view that 
> you know what you are doing, hence the "won't go
> into any more detail 
> here" statement (which is probably not unreasonable
> in my view!).
> 
> And I hope this doesn't make things more confusing!
> 
> Tim
> 
> 
> 
> 


=====
Bakis Siros
Parallel Worlds / Polariton
Athens-Greece
[Doepfer_a100] group owner
http://www.shimarecords.co.uk
http://www.ward12.com


		
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