User Manual

Table Of Contents
Tech-X Flex
®
(P5) Verizon Base Unit User Guide Rev B PRELIMINARY 3/20/2014
5-19
Intro
Wi-Fi
10/100
System
IP/Video
Specs
Measurement
Method
Measurement method to use, which determines the type of data returned by the
test. For more information, see About MOS and R-factor calculations on
page 5-38 and MDI measurement overview on page 5-40.
VQM - See Video quality measurement (VQM) overview and additional results
descriptions on page 5-37.
MDI - See MDI measurement overview on page 5-40.
Note that this selection fundamentally changes the nature of the analysis and the
results that are returned. For the results from a VQM test, see Results - Video
QoS (VQM test) on page 5-24. For the results from an MDI test, see Results -
Video QoS (MDI test) on page 5-23.
IGMP Version Version of IGMP to use for multicast join/leave requests. This must reflect an
IGMP type in use on the network where the request is made.
Options include:
IGMPV1 - IGMP version 1
IGMPV2 - IGMP version 2
IGMPV3 - IGMP version 3
Codec Video codec used for the stream under test.
MPEG2
MPEG4
H264
Jitter Mode Type of jitter buffer emulation used.
Options include:
FIXED - The jitter buffer uses a constant fixed delay. The jitter buffer is
bounded by a nominal and maximum delay, where the nominal delay dictates
the actual delay and the maximum delay dictates the maximum number of
packets that can be stored in the jitter buffer.
ADAPTIVE - The jitter buffer is bounded by a minimum, nominal and
maximum delay, where the minimum delay dictates the minimal accepted jitter
buffer delay, nominal delay dictates the starting delay and the maximum delay
dictates the maximum delay of the jitter buffer. The maximum number of
packets that can be stored in the jitter buffer is a set fraction of the maximum
delay.
Parameter Description