Extron Electronics MLC 226 IP Series Installation - Manual (Page 59)

4-15 MLC 226 IP Series • Software-based Confi guration and Control
PRELIMINAR
Y
This feature addresses a problem that occurs with some projectors that use
range type volume control. When the MLC’s knob controls projector volume,
sometimes the MLC sends the volume commands faster than the projector can
detect and process them. The projector does not detect some of the volume
change commands, resulting in a choppy volume ramp.
Encoder scaling gives the programmer the ability to slow the knob down to a
speed the projector can handle. The drawback is that users must turn the knob
more times to change from minimum to maximum volume. It is up to the user
to fi nd a balance between smooth audio ramping and the number of knob turns
needed to cover the volume range. This requires trial and error for each projector
exhibiting this problem.
Although this feature is mainly for range type volume control, it applies to any
range type command programmed to be executed by the volume knob.
Digital I/O port settings
Digital input/output port 1 consists of pin 1 and the ground pin of the rear panel
Host Control 15-pin HD connector.
For digital I/O port 1, you can
choose one of the four options
(shown at right) for how the port
will function. See pages 2-3 to 2-4
for details on wiring and using this
port.
Digital input port 2 consists of the power sense (Pwr Sns) pin and the Ground pin
of the bottom panel Display RS-232/IR port. Because these pins can be used either
for digital input or for power
sensing, you must use this setting
in Global Confi gurator to select
between digital input and the
power sensor function. See pages
2-6 and 2-7 for details on wiring
and using this port.
Miscellaneous settings
In this area of the Advanced Configuration tab you can choose whether to reset
button statistics (which track how many times each front panel button is pressed)
when uploading the latest confi guration fi le, and/or whether to upload the
enhanced Web pages (which show
photo-like versions of the MLC’s
and control modules’ front panels)
when the confi guration is
uploaded to the MLC.
For more information on button statistics, see “Statistics” on page 4-21. See
page 4-25 for examples of both basic and enhanced Web pages.