Andrew ATC200-Lite Guía para resolver problemas descargar pdf (Pagina 36)

Section 5–Basic Approach: Isolate and Replace Remote Electrical Downtilt System Handbook

5-2 May 2009 Bulletin 639519 • Revision D

5. Check voltage on AISG port on TMA (about 22 Vdc* between pins 6 and 7).

6. Bypass the SBT and TMA. Use a direct RET cable from portable controller to actuators.

7. If steps 1 through 6 fail, you can move the smart bias tee to the other coax feeding into the other

TMA port.

8. If steps 1 through 7 fail, use another TMA to eliminate possibility of a bad AISG component.

9. See Table 2-2 for pin outs.

* Voltages are based on Andrew controller with 24 Vdc power supply.

More speciﬁ c issues are dealt with in subsequent sections of Part 2.

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Andrew ATC200-Lite Guía para resolver problemas Pagina 36