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1997-02-01
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RADIO-FREQUENCY RADIATION CALCULATION PROGRAM*
(*RFCALCS)
THIS PROGRAM IS BASED UPON AIR FORCE OCCUPATIONAL SAFETY AND
HEALTH (AFOSH) STANDARD 161-9, DATED 12 OCTOBER 1984.
THIS PROGRAM IS USED TO HELP TO DETERMINE IF A PARTICULAR RF
(RADIO-FREQUENCY) EMITTER IS HAZARDOUS, POTENTIALLY HAZARDOUS, OR
NON-HAZARDOUS TO PERSONNEL EXPOSED TO ITS ENERGY.
CODES FOR PROGRAM:
1) ANTENNA CODES:
BL -- BLADE
CR -- CIRCULAR REFLECTOR
DC -- DISCONE
DI -- DISCAGE
DL -- DUMMY LOAD
DP -- DIPOLE OR DIPOLE ARRAY
ER -- ELLIPTICAL REFLECTOR
HE -- HELIX
HL -- HORIZONTAL LOG PERIODIC
HO -- HORN
LE -- LENS
LO -- LOOP
MO -- MONOPOLE OE COLINEAR ARRAY
OD -- OTHER, DIRECTIONAL
OO -- OTHER, OMNIDIRECTIONAL
PA -- PHASED ARRAY
RH -- RHOMBIC
RR -- RECTANGULAR REFLECTOR
SL -- SLOT / SLOT ARRAY
ST -- STUB
VL -- VERTICAL LOG PERIODIC
WH -- WHIP
2. SCANNING CODES:
E -- SECTOR SCAN (ELECTRONIC)
F -- FIXED
R -- ROTATING (360 DEGREES)
S -- SECTOR SCAN (MECHANICAL)
T -- TRACKER
3. HAZARD CODES:
CH -- HAZARD LEVELS POSSIBLE, BUT OLNY IN AREAS THAT REQUIRE
CLIMBING.
DL -- TRANSMITTER DUMMY LOADED.
GH -- GROUND-LEVEL HAZARDOUS EXPOSURES POSSIBLE.
IH -- HAZARDOUS LEVELS POSSIBLE, BUT IN NORMALLY INACCESSABLE
AREAS.
MD -- MEDICAL DEVICE; NO LEVELS GENERATED IN EXCESS OF PEL.
MH -- MEDICAL DEVICE; LEVELS GENERATED IN EXCESS OF PEL.
HN -- NO LEVELS GENERATED IN EXCESS OF PEL
SH -- TIME IS TOO SHORT OR INHERENT EQUIPMENT LIMITATIONS MAKE
OVEREXPOSURE UNLIKELY OR IMPOSSIBLE.
4. SYSTEM CONTROL CODES:
AS -- AUDIBLE SIGNAL
BA -- ROPE OR CHAIN BARRIER
CO -- CONSTANT OBSERVATION WHEN TRANSMITTING
FE -- FENCE
FL -- FLASHING LIGHTS
NR -- NO CONTROLS REQUIRED
OM -- OTHER
SC -- SPECIAL COORDINATION WHEN TRANSMITTING
SO -- STANDARD OPERATING PROCEDURE IN EFFECT
WS -- WARNING SIGNS
TABLE 1 -- MAXIMUM PERMISSIBLE EXPOSURE LIMITS (PEL'S) FOR HUMAN
EXPOSURE TO RADIO-FREQUENCY RADIATION. AVERAGED OVER ANG 6 MINUTE
PERIOD.**
________________________________________________________________
FREQ PEL FOR AVG. PEL FOR SMALL
FROM TO SIZE ADULT SIZE HUMAN
MHZ MHZ (mw/sq.cm.) (mw/sq.cm.)
________________________________________________________________
.01 3 100 100
3 30 900/f2 900/f2
30 100 1 1
100 300 f/100 1
300 1000 f/100 f/300
1000 1500 10 f/300
1500 300000 10 5
** -- OBTAINED FROM AFOSH STANDARD 161-9 "EXPOSURE TO
RADIOFREQUENCY RADIATION", DATED 12 OCTOBER 1984.
NOTE: PEL IS THE SAME AS TWA.