Functional
Description
faceplate.cdr:
CorelDRAW 9.0 file used to make faceplates.
(The
faceplate was printed at MP Photo Reproductions on a 3M adhesive-backed vinyl.
The media is soft and delicate. Consequently, it is easily susceptible to
nicks and deep scratches. Care must be exercised when tightening panel components
as excessive pressure on the vinyl will cause it to warp and bubble around
the component.)
This
module provides a bank of 2:1 analog multiplexers and a bank of 1:2 analog
de-multiplexers in order to allow sharing of data acquisition equipment between
two experimental setups. The MUX and De-MUX ports are setup as follows:
Note
that all signals are floating with respect to ground.
Signal
routing is determined by the position of the "Channel Select" switch. When
channel A is selected annunciator LEDs above the channel BNCs become illuminated.
When "Ext. Ctrl." is chosen channel selection is determined by an external
TTL signal; a high level selects channel A.
For
convenience, each multiplexer port output and each de-multiplexer port input
is duplicated on the back panel. Regarding the de-multiplexer input connectors,
do not apply different signals to both front-panel and rear-panel connectors
simultaneously.
Port/relay
assignments are listed in the following documents: rly_assign.pdf
, rly_assign.xls
Interface
Board
The schematic for
the interface board is shown below.
This
diagram is also available as: interface_board.pdf
and in the switch_module.cdr
(v.9)
Printed
Circuit Board
In
order to make new printed cricuit boards, use this template: pcb.pdf.
Alternatively, this diagram can be found in the switch_module.cdr
file above (see Schematic).
Last modified: February 18, 2002 Laura Galiana
