:orphan:

Black Channel: General Black Channel type 2 - Simplex/Broadcast
===============================================================

.. blch:: General Black Channel type 2 - Simplex/Broadcast
   :id: BLCH0003
   :tags: blch
   :date: 2025-08-06
   :status: PASS

Overview
========

The GBC2 (General Black Channel type 2) implements a simplex/broadcast protocol from one transmitting simplifier to one or many receiving simplifier.
See :download:`GBC2 Specification <blch0003_resources/SSPN Simplex Black Channel with Repeaters.pdf>` for implementation details.

.. csv-table:: 61508-2:2010 7.4.11.1 requirements
   :file: blch0003_resources/61508_2_7_4_11.csv
   :widths: 25 25 15 25
   :header-rows: 1

.. csv-table:: 61784-3:2021 Annex D - Verification of safety measures
   :file: blch0003_resources/61784_3_annex_d.csv
   :widths: 25 25 15 25
   :header-rows: 1

.. csv-table:: 61784-3:2021 5.4 - Deterministic remedial measures
   :file: blch0003_resources/61784_3_5_4.csv
   :widths: 25 25 15 25
   :header-rows: 1

Residual Error Rate
-------------------
RER requirements are stated in 61784-3:2021, 5.8.5.
Reference the :download:`RER <../resources/FSD351 Residual Error Rate.ods>` for detailed calculation.
Radio communication is handled in sheet "3. GenBlackChannel".


Revision History
****************

.. list-table::
   :header-rows: 1

   * - Date
     - By
     - Version
     - Description

   * - 2025-08-01
     - Jesper Ribbe
     - V01
     - Initial version