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TABLE 29

0E

36 - 48

45E

15 - 21

90E

2 (max.)

135E

2-4

180E

1-2

225E

3-6

270E

1-2

315E

19 - 28

360E

37 - 50

1m

48

2m

67

3 m (appx)

71

"OPEN FIELD" TEST USING VEHICLE-MOUNTED ANTENNAS

AZIMUTHAL ANGLE (0E=to rear of van)

E F I E L D ( V / m ) 1

I. FIVE-ELEMENT YAGI ANTENNA (mounted appx 4 m above ground level on rotatable pole attached to top of panel van):

(a) 50.125 MHz; 500 W; 10 m horiz dist from pt below antenna center:

(b) 50.125 MHz; 1000 W; @10 m horiz dist from pt below appx. center of antenna; in direction of max propagation:

HGT ABOVE GROUND

E FIELD (V/m)

(c) 50.125 MHz; 500 W; various horiz dist from pt below appx. center of antenna; in direction of max propagation:

DISTANCE

E FIELD (V/m AT GIVEN HGT ABOVE GROUND

(1 m)

(2 m)

2m

5m

10 m

342

15 m

21

20 m

12

25 m

8

50 m

2

18

56

(d) 50.125 MHz; 500 W; measurements inside va:

13

45

48 29 18 13 2

Ambient 3-16 V/m with localized "hot spot" of appx 30 V/m in front of amplifier (antenna pole-mounted appx 2 m abv van) ____________________________________________________________________________________ NOTES:

1 2 Measured @1-2 m hgt above ground; higher readings at 2 m. Also made confirmation reading of 31 V/m (avg) using FOISD (see text). Model HI-3001 field intensity meter used for all readings. Measured values corrected for calibration error and rounded off.

[TABLE 29 continued next page]

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