User Manual
Table Of Contents
- 1: Introduction/Overview
- 1.1 Documentation notes
- 1.2 Important safety note
- 1.3 Product introduction
- 1.4 General product handling and operation
- 1.4.1 Protection from water and dust ingress
- 1.4.2 Powering on/off and sleep mode
- 1.4.3 Attaching, detaching, and handling modules
- 1.4.4 Attaching the strap
- 1.4.5 About the touchscreen display
- 1.4.6 Selecting the active interface
- 1.4.7 Running a function or test
- 1.4.8 Repeating a function or test
- 1.4.9 Screen title bar buttons/icons
- 1.4.10 Capturing a screen image (screenshot)
- 1.4.11 Stopping a test
- 1.4.12 Saving results
- 1.4.13 Maximum test duration for continuous tests
- 1.4.14 Interpreting results
- 1.4.15 Important MoCA module compatibility note
- 1.5 Remote control of the unit
- 1.6 Licensed feature details
- 1.7 Maintenance
- 1.8 FTP information
- 1.9 Technical support
- 2: Wi-Fi Testing Menu
- 3: 10/100/1G Testing Menu
- 4: System Menu
- 4.1 Record Manager
- 4.2 Admin Port
- 4.3 Set Date and Time
- 4.4 Sync with PC
- 4.5 Version Info
- 4.6 Battery Status
- 4.7 Download IPTV Channel Guide
- 4.8 Cal Touchscreen
- 4.9 Licensed Options
- 4.10 Update Firmware
- 4.11 System/Module Settings
- 4.11.1 System/Module Settings > Base Unit
- 4.11.2 System/Module Settings > RF Video Module
- 4.11.3 System/Module Settings > ADSL/VDSL2 Module
- 4.11.4 System/Module Settings > Combined Module Default
- 4.11.5 System/Module Settings > MoCA Module
- 4.11.6 System/Module Settings > DOCSIS Module
- 4.11.7 System/Module Settings > CSM Module
- 4.11.8 System/Module Settings > MoCA-RF Module
- 4.11.9 System/Module Settings > Wi-Fi
- 4.12 Taskforce
- 4.13 Signature Capture
- 4.14 Language Selection
- 4.15 Help and Support
- 5: IP and Video Testing
- 5.1 IP Network Setup
- 5.2 Connection Info
- 5.3 Ping
- 5.4 Traceroute
- 5.5 Web Browser
- 5.6 Packet Loss Test
- 5.7 Throughput
- 5.8 Speedtest
- 5.9 IP Video testing
- 5.9.1 Video QoS (Quality of Service)
- 5.9.2 Change Channel
- 5.9.3 Channel Guide Settings
- 6: Specifications
Verizon Base Unit User Guide Rev B PRELIMINARY 3/20/2014 Tech-X Flex
®
(P5)
5-38
Intro
Wi-Fi
10/100
System
IP/Video
Specs
• The structure and length of GOPs (MPEG Groups of Pictures), especially with regards to the varied
effects of packet loss on different frame types.
• The bit rate and frame size (or resolution) used at the encoder, as smaller rates and lower resolutions
can degrade the quality of the image even if transport is flawless.
• The impact of recency. Recency is the trend of human viewers to judge audio/video quality to be
lower immediately following a disturbance to the signal, and the subsequent trend for that perception
to improve gradually if time passes with no further disturbance.
• Packet loss distribution. Bursty packet loss events in which consecutive packets are dropped have a
different effect on perceived audio/video quality than packet loss events in which single packets are
dropped and the time (or “distance”) between the single loss events is significant.
• Loss of synchronization between the audio and video signals.
While it does not measure signal-to-noise directly, the analysis does use codec and packet loss/discard
information to calculate an estimated peak signal/noise ratio (EPSNR). The EPSNR is then used as a
key input for quality score calculations.
About MOS and R-factor calculations
MOS (mean opinion score) is a numerical system used to grade the subjective perceptual quality of a
multimedia (audio, video, or both) user experience. Originally based on ITU-T recommendations for the
evaluation of voice quality, it uses a scale of 1 - 5 to indicate user experience with the following typical
benchmarks:
MOS scoring is frequently produced by software algorithms that monitor multimedia streams and attempt
to “emulate” a subjective user experience. Such software is intended to produce results that are similar to
MOS scores that would be recorded by actual human participants consuming and evaluating the media.
Score Quality Human perception of degradation
5 Excellent Imperceptible. No degradation of quality can be detected
by a human subject.
4 Good Perceptible. Degradation can detected, but does not
adversely impact the user experience.
3 Fair Slightly annoying
2 Poor Annoying
1 Bad Very annoying or no data stream present