name: XID
full_form: Exchange ID (frame type)
context: The figure 6.10 below illustrates the coaxial interface option overview. Figure 6.10: Overview of Coaxial Interface Option The figure 6.10 illustrates the case when the BS sends RET commands to the RET antenna. The modulator in the BS includes the RET commands to the carrier and the injector adds the modulated signal to the feeder cable. The power level in the Test port x has to be in the range of 9-10 dBm and the spectral characteristics according to the section 6.3.3.2.2.5. When the RET antenna receives the modulated signal in the feeder cable, the power level in the Test port y has to be 4-10 dBm. If the power level is out of this range, it is assumed that extractor and demodulator in the RET antenna cannot extract the RET commands from the modulated signal. When the RET antenna replies to the BS the extractor/injector and modulator/demodulator position changes. The RET antenna has the modulator and injector, and BS accordingly the extractor and demodulator. Test port A is assumed
description: The Exchange ID (XID) is a type of frame used for address assignment and device identification in HDLC (High-Level Data Link Control) communication. It contains parameters like Device Type, Vendor Code, and Address to match and assign addresses to secondary devices.
explanation: The XID is classified as a Message because it is a specific type of frame exchanged between devices for address assignment and identification. Its function of containing parameters for address matching and assignment reinforces its classification as a Message.
section_title: 4.8.3	Address assignment
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biotag_Description: O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Protocol,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O