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44 • DM-NVX-E760 and DM-NVX-E760C
Product Manual — Doc. 8918B
PROBLEM
POSSIBLE CAUSE(S)
CORRECTIVE ACTION
The video flickers or drops
when the DM NVX device is
touched or when metal in
the vicinity of the device is
touched.
The DM NVX device is not
properly grounded.
Properly ground the DM NVX device.
The DM NVX device
indicates that the stream
has started, but video is
not being displayed.
Neither IGMPv2 nor IGMPv3
is enabled in the IGMP
snooping configuration.
Ensure that IGMPv2 or IGMPv3 is
enabled on the network switch.
Video is flickering or video
is not displayed when
multiple DM NVX devices
connect to a network
switch.
Neither IGMPv2 nor IGMPv3
snooping is enabled in the
network switch for the
associated port or VLAN.
Enable IGMPv2 or IGMPv3 snooping in
the correct VLAN.
Video is flickering when
multiple DM NVX
transmitters connect to a
network switch.
The IGMP filter is not set to
drop an unknown multicast
IP address.
Configure the network switch to drop
the unknown multicast IP address.
A DM NVX multicast
stream stopped.
The multicast address is not
set properly on the DM NVX
device.
Ensure that the multicast address is not
a duplicate of a multicast address that
is set on another DM NVX device. Use a
valid multicast address on the DM NVX
device.
DM NVX streaming video is
not seen in the receiver.
The DM NVX receiver is not
configured with the correct
streaming URL and
multicast IP address.
Configure the DM NVX receiver using
the correct streaming URL and multicast
IP address.
Video stops suddenly, and
the IGMP reports
disappear in the network
switch.
The IGMP querier is not
configured correctly.
Configure the IGMP querier correctly.
The recommended setting is the default
setting of the network switch.
If, for any reason, the factory default settings of a DM NVX device must be restored, do one of
the following:
l
In the Action menu located in the upper-right corner of the web interface, click Restore.
l
From the Tools menu in the Crestron Toolbox software, select Text Console and issue the
restore command.
l
Power cycle the device 11 times. After the eleventh power cycle, wait until the device boots
and then press the SETUP button for 5 seconds. The device is operational when the PWR
LED is a steady green.