Date

Set up

distance

Rx Sig. Strength (dBm)

Path Loss (Free Space) (dB)

Measured Path Loss (dB)

Difference

dBm

%

20log(4pd/?) (in dB) = 20log10(40pdf/3) (d in Km, f in MHz)

Tx Power +(TxGain+RxGain)-(TxCable Loss+ Rx Cable Loss)-(Rx Sig. Str.)

    dB

23-Jan-03

Parabolic both sides; Cisco RB 100 mw-70m Low Loss Cable--100mw Power AMP at top @ MBSNL; 50' Lucent cable @ IITK end--Cisco WLAN card

5.1

-55

76%

114.33

118

3.67

13-Dec

Parabolic bothsides, 50 m Low Loss cable on Safipur side & 60 m Low Loss cable on Saroha Side, Cirsco RB 100 mw--Cisco WLAN card @ Safipur

17.7

-76

30%

125.14

131

5.86

Parabolic bothsides, 70 m Low Loss cable on MBSNL side & 50 m Low Loss cable on Safilpur Side, Cirsco RB 100 mw, 1 W Amp below @ Mandhana--Cisco WLAN card without AMP @ Safipur

22.7

-70

50%

127.30

134

6.70

18-Dec

Parabolic bothsides, 15 m Lucent Cable at IITK, Cisco WLAN card-- 60 m Low Loss cable at Saroha, 500 mw AMP at Top @ saroha, Cisco RB 100 mw

37.02

-70

50%

131.55

140

8.45