TVU Transceiver & Receiver Set Up and Operating Guide
v5.5
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Under these conditions it is possible that by switching to advanced mode and either
increasing the bitrate (for improved video quality) or lowering the latency (for lower
delay) may be practical. No action is required, but the system may be capable of
enhanced performance if desired.
Suggestions
•
Try increasing the bandwidth in 256k increments until the Quality indicator starts
to become unstable and cannot sustain the new setting.
•
Try decreasing the delay in 0.2 second increments until the Quality indicator
becomes unstable and does not stay consistent at the maximum bitrate.
Operational Example 3:
TVUPack is being used in an environment with average data
service.
In this scenario the TVUPack is being used in an interview talkback situation. The desire
is to minimize latency but the bandwidth available to the system is limited and the
Quality indicator is fluctuating between 750 and 1800. Uncorrected errors are appearing
in the video output.
Suggestions
•
Try increasing the delay in 0.5 second increments until the uncorrected errors
stop appearing.
•
If delay is the most important factor, try decreasing the maximum bandwidth in
256k increments until the errors cease.
Operational Example 4:
In this scenario the receiver is set to Interview mode, but the pack is inside a building
with poor data service. The line quality indicator increases up to approximately 50.00
but the Quality counter is down at 1000 and there are occasional errors. This indicates
trouble on the underlying data networks.
Suggestion
•
Try increasing the delay in increments of 0.5 seconds to allow the system time to
compensate for poor conditions on the cellular network.
A
PPENDIX
B:
V
ISLINK
H
YBRID
IP
M
ICROWAVE
I
NTEGRATION
T
ECHNOLOGY
With an optional version of the TM8200 modem module, users can utilize Vislink’s
integrated microwave technology. The modem module includes up to 6 embedded
modems and antennas. The Vislink microwave link provides a DHCP Ethernet
connection (via USB adapter) to the TVUPack and provides a UDP transmission path. By
using Vislink’s microwave technology along with other connections on the TVUPack
simultaneously such as Ethernet, WiFi and cellular modems, users can transmit an even
more reliable live HD video with high-picture quality and minimal latency. The
