Crestron
QM-MD7x2
QuickMedia™ Matrix Switcher/Mixer
QM-MD7x2, Slot 1 Digital Input Signal Descriptions
INPUT DESCRIPTION
VideoEnter
When high, any change to VideoInpSelect1 or
VideoInpSelect2 is transferred to the switch.
AudioEnter
When high, any change to AudioInpSelect1 or
AudioInpSelect2 is transferred to the switch.
FrontPanelLockout
Locks out the
LOCAL
button on the front panel of
the MD7x2 for as long as the input remains high.
When this input is high, the user cannot switch the
unit into Local mode. If the unit is already in the local
mode, the activation of this signal will take the unit
back into the system mode.
RecallQMLink6Preset and
RecallQMLink7Preset
Recalls the peaking and boost values saved in the
presets given by the analog signals
QMLink6Preset
and/or
QMLink7Preset
when the input is held high.
The peaking and boost settings are then applied to
QM IN 6 or QM IN 7.
SaveQMLinkPreset
Saves the peaking and boost values given by the
analog signal
QMLinkPeakToSave
and
QMLinkBoostToSave
to the preset given by the
analog signal
QMLinkPreset#ToSave
, when the
input is held high.
If the save is asserted at the same time as a recall,
the recall operation takes precedence and the save
is ignored.
NOTE:
When the front panel is locked, the MD7x2 will switch to the system mode
and use the switch configuration and preset settings specified by the control system.
QM-MD7x2, Slot 1 Analog Input Signal Descriptions
INPUT DESCRIPTION
QMLinkPeakToSave
Sets the peaking value that will be saved to the
preset given by
QMLinkPreset#ToSave
when
SaveQMLinkPreset
is held high.
Peaking improves the transmission of the encoded
audio signal over cable lengths up to 300 feet.
Peaking values range from 0% to 100%, adjustable
in 1% increments. Peaking is also programmable
using DMT Software.
The following table lists recommended peak/boost
values for various cable lengths.
Cable
Length
(ft)
Recommended
Peak Value
(%)
Recommended
Boost Value
(%)
0
0%
20%
50
5%
23%
100
10%
25%
150
15%
28%
200
20%
30%
250
25%
33%
300
30%
35%
(continued on next page)
Operations Guide - DOC. 6273
QuickMedia™ Matrix Switcher/Mixer: QM-MD7x2
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