ESI U46DJ User Manual download pdf (Page 11)

ROMES Setup

1SP52_1E.doc Rohde & Schwarz Voice Quality Measurements with R&S ROMES

(3) If you are using an answering machine select “Downlink”. With an SQA server can

select “Both (Up- and Downlink)”. You have to configure reference files and pauses

to match your server configuration. (see Figure 2)

(4) Select the correct audio card for each mobile. For M-Audio and ESI U46DJ only use

the ASIO sound drivers. The ASIO drivers have to be different, to avoid sound card

driver conflicts.

If you are using an answering machine and want to use the “Initial pause” add a silent

prefix with the length of the initial pause to the edited reference file.

11.3s

8.4s

PESQ algorithm

Initial Pause End Pause PESQ algorithm

8.4s

Initial Pause

2.5s

9s 2.5s

Initial Pause

8.4s

Play file

End Pause

11.3s

Initial Pause

End Pause

Time

Figure 2 Timeline of the SQA settings above

It is recommended to adjust the “End Pause” and the “Initial Pause” so that the uplink and

the downlink do not overlay. The PESQ values could decrease.

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ESI U46DJ User Manual Page 11