AC505A
10
Blank
If enabled, then double clicking the pushbutton will cause the
output to go blank. If dip switch is off, then the double click
feature is not there and if the user presses the button in quick
succession, all that the switch will do is to switch between the
inputs quickly!
TTL
In this mode the selection of input is determined by an
external contact closure or TTL signal. The customer should
provide his or her own cable. The signal is to be asserted
between the tip and ground of the 3.5mm mini-plug. A high
(or open input) selects input #1 and a low (or short to ground)
will select input #2. The center ring of the connector can be
used to light an external LED for indication of the selected
channel if desired. Simply tie the ring to the anode of the Led
with the cathode tied to ground.
RS-232
This position is to allow the switch to be controlled via a
Serial device. The same CTRL connector is used to attach the
device to the serial port via a supplied cable. The unit
operates at 1200 baud (adequate since only single ASCII
characters are used to command the switching, and the lower
baud rate eliminates cable length, shielding and noise issues).
From the serial port you have full control over the operation
of the switch (e.g. select input 1, input 2, blank the output,
un-blank the output, or place the switch in and out of auto-
mode).
