8. Protocol Analysis

For digital data transmission to AES 3 or IEC 958 additional bits are included in the data stream. Channel status and user data can be generated and evaluated by means of Audio Analyzers UPD and UPL. Transmission errors can be displayed as well, and UPD even allows errored protocols to be generated.

For protocol analysis UPD has to be fitted with Option UPD-B2 (AES/EBU Interface) only whereas UPL requires Option UPL-B21 (Protocol Analysis) in addition to Option UPL-B2 (Digital Interfaces).

8.1. Binary Data Protocol

Setup:

o PROTB_DD.SAC

With the aid of this setup the user can generate the entire protocol by entering binary numbers and have it displayed in binary format as well. This facility is above all used by circuit design engineers to generate specific bit patterns.

8.2. Channel Status Data in Professional Format (AES 3)

Setup:

o PROTP_DD.SAC

This setup generates and evaluates the entire data protocol in line with AES 3 specifications. All information is displayed in plain text, ie decoded form. If the generator panel is switched to ENHANCED, the current CRC and time code can be calculated and output. With STATIC (on UPL) these data are calculated once and are not updated for subsequent output.

8.3. Channel Status Data in Consumer Format (IEC 958)

Setup:

o PROTC_DD.SAC

Section 8.2 "Channel Status Data in Professional Format (AES 3)" apply analogously, generation and evaluation of protocol data is in line with IEC 958.