693KA8-21-PSIR-APC-01 Attach 04 Summary of Updates to Previously Released APC System Specification and IRD 20210325.pdf

03/25/2021 Summary of Updates to Previously Released Specification and IRD

FAA Announcement No.

693KA8-21-PSIR-APC-01

Attachment 04

APC System Specification Updates

The following key updates were added to draft #3 of the APC System Specification:

1. Added shading to text, figures, and requirements to identify Analog Transport areas for APC communications links, which will be added later after In Service Decision (ISD) through an

Engineering Change Proposal (ECP) (see section 1.1).

2. Further clarified what an APC System encompassed throughout the specification.

3. Added reference to ED-137C Clarification Matrix, which will be added later in Section 7.

4. Further clarified LLR-APC functions with the FAA’s Local Legacy Radios (section 3.1.1).

5. Further clarified requirements that only apply when APCs are utilizing Analog Protocol.

6. Further clarified requirements for APC recovery from analog communication path failures

(sections 3.1.2.1.2 & 3.1.3.1.2).

7. Added R-APC Best Signal Selection (BSS) requirements for both Legacy and IP Radios (sections

3.1.3.2.1.1.5, 3.1.3.2.1.2.5, & 3.1.3.2.1.2.6).

8. Further clarified system expansion requirement for APCs (section 3.1.8.1).

9. Added requirements for APC front panel controls and indicators (section 3.1.9.3).

10. Added requirements for monitoring, maintenance, and configuration of APCs (section 3.1.10).

11. Added requirements to support the FAA Remote Monitoring System (section 3.1.10).

12. Added Graphical User Interface (GUI) requirements for APCs (section 3.1.10.4).

13. Added Automatic Gain Control (AGC) requirements for analog voice paths associated with L-APC and R-APC (section 3.2.1).

14. Clarification added to Table 3-6 for APC System Operational Environments

APC to Analog Radio Control Systems IRD Updates

The following key updates were added to draft #3 of the APC to Analog Radio Control Systems IRD:

1. Added shading to text, figures, and requirements to identify Analog Transport areas for APC communications links, which will be added later after In Service Decision (ISD) through an

Engineering Change Proposal (ECP) (see section 1.1).

2. Further clarified LLR-APC interfaces with the FAA’s Local Legacy Radios (section 3.2.1).

APC System to FAA Facility Power IRD Newly released.

APC System to Government Transport System (GTS) IRD Newly released.

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