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

dB                                           decibel

dBm                                        decibel referenced to one milliwatt

DBM                                      data block message DO                                          design objective DTM                                      data text message

EFI                                         error-free interval

FEC                                        forward error correction

GPS                                         Global Positioning System

HF                                          high frequency HFDLP                                   HF data link protocol HFNC                                     HF networking controller HMTP                                    HF mail transfer protocol hr                                            hour

Hz                                           hertz

ICD                                        interface control document

IONCAP                                program of link quality predictions

LAT                                        latitude

LP                                           linking protection

LPM                                       link performance measure

LQA                                       link quality analysis

LON                                       longitude

LSB                                        least significant bit

min                                         minutes

MP                                          multipath

ms                                           milliseconds

MSB                                       most significant bit

NAK                                       negative acknowledgment

NCS                                        net control station

No Op                                    no operational

PBER                                     pseudo bit error ratio PDU                                       protocol data unit ppm                                        parts per million

PSK                                        phase shift key

s                                              second

SD                                          spectral distortion

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