Specifications

2.43

Applications Manual

Revision 1.11Prism Sound dScope Series III

The dScope measures the residual amplitude of both EUT output channels, after a 200Hz notch filter,

band-limited between 22Hz and 22kHz, and using a CCIR–2k weighting filter.

Note that this test is performed as a sweep against track time (even though it could actually be a

single spot measurement) for consistency with the Dolby test procedure.

Specification

The signal-to-noise, relative to a –20dBFS level, for line outputs should be less than –65dBr and for

headphone or speaker outputs, less than –60dBr.

4.2.1.11 Inter-channel Phase

dScope Configuration:

Inter-channel Phase Track 19.dsc

Track Number:

Corresponding AP Test File:

.ac3 Test File:

2fstplr.ac3

Duration:

60 sec

Test Signal Description:

20Hz to 20kHz sweep at –20dBFS

Description

This test measures the inter-channel phase of the

EUT

between 20Hz and 20kHz at –20

dBFS