138 • DM NVX® 4K60 4:2:0 Network AV Encoders and Decoders
Product Manual — Doc. 9219A
PROBLEM
POSSIBLE CAUSES
CORRECTIVE ACTIONS
Video from a 4K60 4:4:4
encoder (for example, a
DM-NVX-36x or DM-NVX-
E30) is not being
displayed.
Incompatible stream type is set
on the 4K60 4:4:4 encoder.
Ensure that the stream type is set to
E10/E20 on the 4K60 4:4:4 encoder.
The resolution of the video
source connected to the 4K60
4:4:4 encoder is not supported
by the DM-NVX-D20 or DM-
NVX-D200 decoder.
Change the resolution of the video
source to 4K60 4:2:0 or lower.
The analog audio output
is not functioning.
The audio is multichannel on
the encoder, which does not
downmix a 2-channel signal
from a multichannel surround
sound source.
Switch the audio input to 2-channel
audio.
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
grounded properly.
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
encoders 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 decoder.
The DM NVX decoder is not
configured with the correct
streaming URL and multicast
IP address.
Configure the DM NVX decoder 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.