User's Manual Part 1

Nomad User’s Manual Chapter 7 – Monitoring a Test in Progress

7.2.1.2 Downlink Volume Adjustment for Analog Connections

To manually find the optimal downlink volume for any analog channel using the Levels dialog:

 For the channel of interest, move the Input Level slider to the far right such that the

Overdrive light illuminates in the GUI and a red light appears for that channel on the

hardware unit.

 Move the Input Level slider to the left one notch at a time and observe the Overdrive

indicator during the Recording state.

 The first position at which the Overdrive light stays off for the current and next recording

cycle should be used as the Input setting.

For most handsets, the Input Level will fall within the Normal Operating Range of 170-225

shown on the slider. The downlink Insertion Gain or Attenuation shown in the Task Status

Window will likely read around 0. If the Overdrive Indicator illuminates for any channel, decrease

the Input Level control gradually until it goes off. Note that any adjustment will take effect in the

next audio cycle.

Figure 7-23 - Analog Volume Controls

7.2.2 Manual Uplink Volume Adjustment

In both the analog and Bluetooth connection cases, uplink volume adjustment is necessary only if

uplink MOS values are unexpectedly poor. If this is the case, move the Output Level slider in the

Settings → Levels dialog within the Normal Operating Range. If uplink MOS deteriorates after

the adjustment, return the Output Level to the original value.

7.3 Event Logging and Event Detection (Voice Quality Testing)

Events that occur during a Voice Quality test call complement MOS measurements to provide an

overall indication of handset performance. Unlike RF collection tools, Nomad’s Voice Quality task

does not have access to protocol layer information traditionally used to detect handset events such

as dropped calls. Nomad does provide the ability to note events of interest on both a per-channel

and per-cycle basis during a Voice Quality task. Nomad also provides the ability to automatically

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

Event logging and event detection takes place in the Events tab of the MOS Trends Window during

Voice Quality testing.

To manually note a channel-specific event of interest:

 View the Events tab of the MOS Trends Window.