User's Manual Part 2

Nomad User’s Manual Chapter 9 – Voice Quality Configuration Options

9.8 Head and Torso Simulator

A HATS system may be used in conjunction with the test mobile and base station simulator in

Nomad testing to realistically simulate the effect of an adult head and torso on voice quality. The

HATS system may be configured with the base station simulator in two different configurations. In

each configuration, MOS results at the handset will be displayed in the Nomad Channel 1 area

during testing. Results at the base station simulator will be displayed in the Channel 2 area. The

following sections describe the hardware configuration and volume settings for the HATS

configurations. All other test procedures follow the steps described for the base station simulator

in Section 9.6.

Note: The Input and Output settings described in this section represent a general test case that

has been performed in the Spirent lab. If you require settings corresponding to specific test cases,

please contact your Spirent representative.

9.8.1 HATS Three Channel Configuration

The Spirent ME hardware shall be configured as show below for the HATS three channel

configuration:

Figure 9-9 - HATS Three Channel Configuration

On the Nomad Test Setup tab, configure the channels as follows:

 Channel 1 – Connects to Ear MIC – “Downlink”

o Task Type: Mobile

o Session → Uplink Device: Base task on channel 2

o Channel Settings → Audio interface for this channel: Analog Interface(ME),

Narrowband (ME HD) or High Definition (ME HD)

o Channel Settings → Input: 210