Table 4.3: Methods For Fine Tuning; Fine Tuning Suggestions - Avocent Emerge MPX Installer/User Manual

Fine tuning suggestions

The following table provides detailed instructions for tuning your MPX extenders.

Table 4.3: Methods for Fine Tuning

If you are fine tuning...
choppy video for a wired or
wireless connection
wireless channel contention
resulting from other
wireless devices
Then choose...
The Wireless Video Data Rate settings on the Tuning Parameters page
of the transmitter. Figure 4.1 on page 45 illustrates this web page.
Choppy video is the result of lost data. The receiver to continue to output
the last fully-received frame until a complete new frame is received. This
is not noticeable for a still image, such as a spreadsheet. This is
particularly noticeable, however, for a motion video. Audio playback
requires minimal bandwidth and typically plays smoothly, even when
motion video is choppy.
To restore smooth video playback, adjust the minimum data rate setting
downward as needed to obtain a constant frame rate of 24 fps or greater
under adverse conditions. Lowering the minimum setting allows you to
maintain constant frame rate by slightly softening the image during
adverse media LAN conditions. As conditions improve, the transmitter
will gradually raise the video data rate.
Retransmission requests may stem from a temporary signal blockage,
such as a box being placed in front of the transmitter. Wireless channel
contention may also cause data interference. If interference becomes
chronic, you may want to consider antenna extension cables or selection
of a different wireless channel to relieve the condition.
Wireless Channel from the drop-down list on the Media LAN Settings
page of the transmitter. Figure 4.3 illustrates this web page.
Channel contention arising from other devices operating in the same
channel may cause excessive dropped video frames. Selection of an
unused channel will resolve this issue.
Available channels may be selected from a drop-down list. The selected
channel will be used by the transmitter and bound receivers. Once
changed, the media session will drop and bound receivers will enter a
search mode. After the transmitter is detected, the session will
continue normally.
Chapter 4: Additional Functions 47