User's Manual Part 1

Nomad User’s Manual Chapter 4 – Specifying Nomad Settings

 Use the Color Bar to set the thresholds that determine Great (green), Good (yellow) and

Bad (red) voice quality performance.

 Check Collect X random WAV sample(s) from each MOS range above at the end of each

session to set aside a random sample of audio files within each MOS performance range.

This allows the audible verification of Great, Good and Bad audio samples at the conclusion

of the test. See Section 8.5 for detailed information on collecting random audio sample files.

 Set the Low MOS score alert threshold to a MOS value between 0 and 4.5. When a MOS

reading falls below this threshold, Nomad will present either a Visual Notification or

Visual & Audio Notification to the user. Effectively disable this functionality by setting the

Low MOS score alert threshold to 0.

4.4.2 Events

Events that occur during a test session complement voice quality to provide an overall indication of

handset performance. Nomad provides the ability to note events of interest on both a per-channel

and per-cycle basis during voice quality testing. Nomad also provides the ability to automatically

detect a sequence of null MOS values, often indicative of a dropped call.

 Select Enable Event Detection to automatically detect and log null MOS events.

 Select the number of consecutive null MOS scores that constitute a Null MOS Event and

customize the label for this event.

 Select the Edit Event Classifications button to specify custom Event Classifications by

event names. These events must be manually recorded in the Events tab of the MOS

Trends Window upon occurrence during testing. See Section 7.2 for more information

about event logging and event detection during Voice Quality testing.

Figure 4-12 - Events Area

4.4.3 Bluetooth Auto-Dial

Check Enable auto-dial on Bluetooth audio channels when starting session to allow Nomad to

automatically dial the audio server for channels connected using Bluetooth. Spirent recommends

that international users dialing a non-US audio server should disable this option as local dialing

conventions may be best handled manually.

Figure 4-13 - Bluetooth Auto-Dial Area