ADCP-61-471 • Issue 4 • June 2000 • Section 2: Operation and Maintenance

TAP-104

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DUAL REPEATER INCOMPATIBILITY DIAGNOSIS

Summary: This TAP describes how to diagnose dual repeater software (MPU V5.2) incompatibilities for HLXCs, HLXRs, and HRXs; and also describes how they are reported. Except where noted, system configurations are assumed to include two HRXs, and the HLXCs and HLXRs are assumed to be compatible with MPU V5.2.

HLXC

An incompatible HLXC is any Version D or earlier HLXC without software support for a second HRX. In such a case, the HRX1 will detect the incompatible HLXR, set the alarm bit, and report “2ND-HRX-IN” in the serial number in its inventory data to “2ND-HRX-IN”. If the HLXC is a Version D or earlier, and the HRX1 is a Version A, incompatibilities are not detectable. (Note: Version C or earlier HLXCs do not support any HRXs. However, a Version B HRX in the HRX1 position will set an alarm bit for an incompatible HLXR.) The MPU should activate the “Version Mismatch” alarm and display the HRX inventory with the corrupted serial number.

Reference: DLP-540

Inventory Display

HLXR

An incompatible HLXR is any Version D or earlier HLXR without software support for a second HRX. In such a case, the HRX1 will detect the incompatible HLXR, set the alarm bit, and report “2ND-HRX-IN” in the serial number in its inventory data to “2ND-HRX-IN”. (Note: In addition, when Version B and C HLXRs are used, the HRX2 must shut off power to the HLXR to avoid damage.) The MPU should activate the “Version Mismatch” alarm and display the HRX inventory with the corrupted serial number.

HRX1

An incompatible HRX1 is any Version A HRX that has another HRX between it and the HLXR. This is diagnosed by the HLXC when it finds an HRX2 in the system. If the HLXC is a Version D or earlier, it cannot set the alarm bit for the incompatible HRX1, or corrupt the serial number. The HLXC will set the alarm bit for the incompatible HRX1 and report “OLD-HRX-IN” in the serial number field of the HRX1 inventory. Thus, a Version D (or earlier) HLXC with a Version A HRX in the first position (HRX1) cannot be diagnosed at all. The MPU should also activate the “Version Mismatch” alarm and display the corrupted serial number. If the HLXC is a Version D or earlier, the alarm bit for dual repeater incompatibility cannot be set. Thus, the MPU can only display the corrupted serial number.

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