MIL-STD-469 Radar Engineering Interface Requirements, Electromagnetic Compatibility See Notice 1 For Replacement InformationThis standard establishes the engineering interface requirements to control the electromagnetic emission and susceptibility characteristics of all new military radar equipment and systems operating between 100 megahertz MHz, and 100 gigahertz GHz, to ensure EMC in all intended operational environments, and to conserve the frequency spectrum available to military radar systems.

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MIL-STD-469B

R                           Distance, radar antenna to test antenna (meters)

RNM

Distance (nautical miles)

SF                         Pulse width of single step of frequency, (seconds)

t        Emitted pulse duration in seconds at 50 percent amplitude (voltage) points.  For coded  pulses, the pulse duration is the interval between 50 percent amplitud e points of one chip (sub-pulse). The 1 00 percent amplitude is the  nominal flat top level of the pulse.

T                           Period between a given reference point on consecutive pulses (seconds)

Ta

teff

tf

Oscilloscope vertical display rise time (seconds) Effective pulse width (   sec)

Pulse fall time (90 percent amplitude to 10 percent amplitude, in     sec)

3dB

Ti TO TS tr

Antenna main lobe width at 3 dB points (degrees) Rise time indicated on oscilloscope display (seconds) Transmitter turn-on time (seconds)

Sweep time (seconds)

Emitted pulse rise time in microseconds (   sec) from the 10 percent to the 9 0 percent amplitude points  on the loading edge. For coded pulses it is the rise time of a sub-pulse; if the sub-pulse rise time is not discernible, assume that it is 4  0 percent of the time to switch from one phase or sub-pulse to the next.

Tr                                          Response time of test receiver and recorder (milliseconds)

w                         Rotational speed (r/min)

XPw                    Expanded pulse width (pulse compression radars) (    sec).

4.  GENERAL REQUIREMENTS

4.1  Radar equipment and subsystems.  Radar equipment and subsystems acquisitions shall comply with the applicable requirements (see 4.1.1 through 4.1.6). These requirements shall be in addition to the applicable emission and susceptibility requirements and limits as specified in MIL-STD-461.

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