MIL-STD-187-721 Interoperability And Performance Standard For Advanced Adaptive Hf RadioThe purpose of this document is to describe the technical parameters for adaptive high frequency HF radio that are more advanced than those described in MIL-STD-188-141. The advanced technology contained in this standard will guide the planning of military adaptive HF radio network technology into the 21st century. To fully understand and utilize this document, it is necessary to refer to portions of MIL-STD-188-141.

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MIL-STD-187-721D

5.11.1.4  HFDLP ALM change frequency CMD.

The Change Frequency CMD shall be sent to indicate a new operating frequency as shown on figure 27.

FIGURE 27.  HFDLP ALM change frequency CMD.

When the Flags field is set to 000, the Channel Number field shall indicate the new channel for traffic.  When the Flags field is non-zero, the Channel Number field shall be all 0s, and the Flags and Frequency fields shall be used as in the Assign Frequency CMD to indicate the new traffic frequency.

5.11.1.5  HFDLP ALM adjust power CMD.

The Adjust Power CMD shall be sent to request a change in output power from the other station on a link as shown on figure 28.  The request specifies either an absolute output power or an adjustment relative to the current power level as defined in table XXII.

FIGURE 28.  HFDLP ALM adjust power CMD.

TABLE XXII.  Flags in HFDLP ALM adjust power CMD.

Flags       Meaning of Power Field

000         Absolute Power in dBW (> 1W)

001         Absolute Power in -dBW (< 1W)

010         Power increase in dB

011         Power decrease in dB

1xx         (reserved)

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