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

controlled radars conform to this requirement if operation at any f requency across the band can be achieved with a crystal change. Radar systems under group D shall be tunable continuously over the entire 2700 to

2900 MHz band.

TABLE V. Transmitter maximum emission levels outside B  40 dB  range.

1.   Reference diagram:

F 0

Pt

X dB

0.5B-40 dB

B -40 dB

Pt  -40 dB

F MIN

B -X dB

F MAX

2.   For Category 1 and 2 radars, the maximum level of emissions outside the B xdB  frequency range and within the FMIN  to FMAX  frequency range shall be as follows:

Groups B and C: (Pt

60) dBm/kHz or   30 dBm/kHz, whichever is less

Group D: (Pt

80) dBm/kHz

3.   The B x dB  range shall be obtained from the following relationships: Category 1; Groups B and C:

B       = 10a  (B        ); where a = 1 or (P

10)/20, whichever is greater.

x dB = 60 or (Pt  + 30), whichever is greater.

Category 2; Groups B and C:

B       = 10a  (B        ); where a = 2/3 or (P

10)/30, whichever is greater.

x dB = 60 or (Pt  + 30), whichever is greater.

Categories 1 and 2, Group D:

B x dB  = 10 (B 40 dB), x dB = 80, special group D requirements are given in 5.3.5.

4.   Emission levels at frequencies F within the regions where

0.5 B 40 dB  <   IF     FoI   < 0.5 B x dB, shall be equal to or lower than the values obtained from the following equations:

Category 1; Groups B and C: Maximum emission level = Pt

Category 2; Groups B and C: Maximum emission level = Pt

40   20 logI(F    Fo) / (0.5B 40 dB)I

40   30 logI(F    Fo) / (0.5B 40 dB)I

Categories 1 and 2; Groups D:

Maximum emission level = Pt

40   40 logI(F    Fo) / (0.5B 40 dB)I

Special group D requirements are given in 3.3.3.

5.   FMIN  and FMAX  are defined in table VI.

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