EMF Survey Training - Part 2g
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Transcript of EMF Survey Training - Part 2g
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Overall EIRP/EIRPth calculation of Corner C1
(EIRP/EIRPth)Corner C1 = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2 Hence (EIRP/EIRPth) = 8.08+0.25 =8.33 [DoT limit exceeded, Result-fail] Similar calculations made for C2,C3 & C4.
-
EIRP/EIRPth Calculation for B1
B1
-
Case 1: RTT (Antenna installed on a roof top tower On the terrace of a building),B1,B2,B3Bn (Operator 1 & 2)
Building Height=15m
B0
B2
d = 30Mtr,Azimuth=30 Degree
d = 20Mtr,Azimuth=40 Degree
B1
h = 10
h = 35
Total Building(B1) height h =10Mtr , d=20Mtr ,Total 3 floors so EMF to be calculated at various floors.(1st,2nd & 3rd floor)
OP1,h= 9m,worst sector antenna height
OP2,h= 15m, worst sector antenna height Operator 1 GSM ,f=900
Operator 2- LTE ,f=2300 Tower Height is 24m
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Operator1: EIRPth calculation for B1,1st floor
Formula
Example:
h= 24Mtr, h=3Mtr, d=20Mtr, Asl=0.02, =8, bw=6.5 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 34293.18 Hence EIRP[T]/EIRPth= 1995.26/ 34293.18=0.23
As it is a shared site, similar calculation are made for the other operator2 and total ratio calculated as under: (EIRP/EIRPth) = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B1) d (B1)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor1/B1 16 8 6.5 17 0.02 15 24 46 0 10 0 900 10 20
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f> 400-2000MHz
Condition 1 Condition 2 Result
DoT Formula
RTT
B1,B2,B3,.Bn
3 (determine by h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
34298.18
125283.65
34298.18
222000
hAsl
f2
22 )'(
2000
d
hhd
Asl
ft
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Operator1: EIRPth calculation for B1,2nd floor
Formula
Example:
h= 24Mtr, h=6Mtr, d=20Mtr, Asl=0.02, =8, bw=6.5 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 34293.18 Hence EIRP[T]/EIRPth= 1995.26/ 34293.18=0.23
As it is a shared site, similar calculation are made for the other operator2 and total ratio calculated as under: (EIRP/EIRPth) = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B1) d (B1)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor1/B1 16 8 6.5 17 0.02 15 24 46 0 10 0 900 10 20
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f> 400-2000MHz
Condition 1 Condition 2 Result
DoT Formula
RTT/RTP,GBT/GBM
B1,B2,B3,.Bn
3 (determine by h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
34293.18
92849.49
34293.18
222000
hAsl
f2
22 )'(
2000
d
hhd
Asl
f
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Operator1: EIRPth calculation for B1,3rd floor
Formula
Example:
h= 24Mtr, h=9Mtr , d=20Mtr, Asl=0.02, =8, bw=6.5 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 34293.18 Hence EIRP[T]/EIRPth= 1995.26/ 34293.18=0.23
As it is a shared site, similar calculation are made for the other operator2 and total ratio calculated as under: (EIRP/EIRPth) = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B1) d (B1)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor1/B1 16 8 6.5 17 0.02 15 24 46 0 10 0 900 10 20
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f> 400-2000MHz
Condition 1 Condition 2 Result
DoT Formula
RTT/RTP,GBT/GBM
B1,B2,B3,.Bn
3 (determine by: h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
34293.18
69193.04
34293.18
222000
hAsl
f2
22 )'(
2000
d
hhd
Asl
f
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Operator2: EIRPth calculation for B1,1st floor
Formula
Example:
h= 30Mtr,h =3Mtr, d=20Mtr, Asl=0.02, =7, bw=7 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 123442.85 Hence EIRP[T]/EIRPth= 8003.71 / 123442.85=0.02
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B1) d (B1)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor2/B1 17 7 7 17 0.02 15 30 46 0 10 0 2300 10 20
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f> 2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
B1,B2,B3,.Bn 3 (determine by: h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
123442.85
501738.89
123442.85
22hAsl
2
22 )'(
d
hhd
Asl
-
Operator2: EIRPth calculation for B1,2nd floor
Formula
Example:
h= 30Mtr,h =6Mtr, d=20Mtr, Asl=0.02, =7, bw=7 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 123442.85 Hence EIRP[T]/EIRPth= 8003.71 / 123442.85=0.02
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B1) d (B1)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor2/B1 17 7 7 17 0.02 15 30 46 0 10 0 2300 10 20
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f> 2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
B1,B2,B3,.Bn 3 (determine by: h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
123442.85
374963.95
123442.85
22hAsl
2
22 )'(
d
hhd
Asl
-
Operator2: EIRPth calculation for B1,3rd floor
Formula
Example:
h= 30Mtr,h =9Mtr, d=20Mtr , Asl=0.02, =7, bw=7 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 123442.85 Hence EIRP[T]/EIRPth= 8003.71/ 123442.85=0.02
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B1) d (B1)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor2/B1 17 7 7 17 0.02 15 30 46 0 10 0 2300 10 20
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f> 2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
B1,B2,B3,.Bn 3 (determine by: h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
123442.85
278408.10
123442.85
22hAsl
2
22 )'(
d
hhd
Asl
-
Overall EIRP/EIRPth calculation of floor1
(EIRP/EIRPth) of Floor1 = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2 Hence (EIRP/EIRPth) = 0.23+0.02 =0.25 [Within DoT limit , Result-Pass] Similar Calculations made for rest of the floors also.
-
EIRP/EIRPth Calculation for B2
B2
-
Case 1: RTT (Antenna installed on a roof top tower On the terrace of a building) Operator 1 & 2
OP1,h= 9m,worst sector antenna height
Building Height=15m
Tower height=24m
B0
B2
d = 30Mtr,Azimuth=30 Degree
d = 20Mtr,Azimuth=40 Degree
B1
h = 10
h = 35
Total Building(B2) height h =35Mtr , d=30Mtr ,so EMF to be calculated at various floors.(1st,2nd ,3rd floor..11th floor)
OP2,h= 15m,worst sector antenna height
Operator 1 GSM ,f=900 Operator 2- LTE ,f=2300
-
Operator1: EIRPth calculation for B2,1st floor
Formula
Example:
h= 24Mtr,h =3Mtr, d=30Mtr , Asl=0.02, =8, bw=6.5 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 34293.18 Hence EIRP[T]/EIRPth= 8003.71/ 34293.18=0.23
As it is a shared site, similar calculation are made for the other operator2 and total ratio calculated as under: (EIRP/EIRPth) = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2
As h(Height of 1st floor-3mtr)
-
Operator1: EIRPth calculation for B2,2nd floor
Formula
Example:
h= 24Mtr,h =6Mtr , d=30Mtr, Asl=0.02, =8, bw=6.5 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 34293.18 Hence EIRP[T]/EIRPth= 8003.71/ 34293.18=0.23
As it is a shared site, similar calculation are made for the other operator2 and total ratio calculated as under: (EIRP/EIRPth) = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2
As h(Height of 2nd floor-6mtr)
-
Operator1: EIRPth calculation for B2,3rd floor
Formula
Example:
h= 24Mtr,h =9Mtr , d=30Mtr, Asl=0.02, =8, bw=6.5 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 34293.18 Hence EIRP[T]/EIRPth= 8003.71/ 34293.18=0.23
As it is a shared site, similar calculation are made for the other operator2 and total ratio calculated as under: (EIRP/EIRPth) = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2
As h(Height of 3rd floor-9mtr)
-
Operator1: EIRPth calculation for B2,11th floor
Formula
Example:
h= 24Mtr,h =33Mtr , d=30Mtr, Asl=0.02, =8, bw=6.5 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 1272.35 Hence EIRP[T]/EIRPth= 8003.71/ 1272.35=6.29
As it is a shared site, similar calculation are made for the other operator2 and total ratio calculated as under: (EIRP/EIRPth) = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2
As h(Height of 11th floor-33mtr)>h-d*Tan(+1.129*bw),so accessibility category will be chosen as category 2
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B2) d (B2)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor1/B2 16 8 6.5 17 0.02 15 24 46 0 10 0 900 35 30
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f=400-2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
B1,B2,B3,.Bn 3 (determine by: h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
34293.18
1272.35
34293.18
222000
hAsl
f2
2000d
Asl
f
-
Operator2: EIRPth calculation for B2,1st floor
Formula
Example:
h= 30Mtr,h =3Mtr, d=30Mtr , Asl=0.02, =7, bw=7 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 123442.85 Hence EIRP[T]/EIRPth= 8003.71 / 123442.85=0.02
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B2) d (B2)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor2/B2 17 7 7 17 0.02 15 30 46 0 10 0 2300 35 30
Total Tilt -
Operator
As h(Height of 1st floor-3mtr)
-
Operator2: EIRPth calculation for B2,2nd floor
Formula
Example:
h= 30Mtr,h =6Mtr, d=30Mtr, Asl=0.02, =7, bw=7 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 123442.85 Hence EIRP[T]/EIRPth= 1995.26 / 123442.85=0.02
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B2) d (B2)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor2/B2 17 7 7 17 0.02 15 30 46 0 10 0 2300 35 30
Total Tilt -
Operator
As h(Height of 2nd floor-6mtr)2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
B1,B2,B3,.Bn 3 (determine by: h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
123442.85
381136.09
123442.85
22hAsl
2
22 )'(
d
hhd
Asl
-
Operator2: EIRPth calculation for B2,3rd floor
Formula
Example:
h= 30Mtr,h =9Mtr, d=30Mtr , Asl=0.02, =7, bw=7 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 123442.85 Hence EIRP[T]/EIRPth= 1995.26/ 123442.85=0.02
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B2) d (B2)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor2/B2 17 7 7 17 0.02 15 30 46 0 10 0 2300 35 30
Total Tilt -
Operator
As h(Height of 3rd floor-9mtr)2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
B1,B2,B3,.Bn 3 (determine by: h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
123442.85
314604.49
123442.85
22hAsl
2
22 )'(
d
hhd
Asl
-
Operator2: EIRPth calculation for B2,11th floor
Formula
Example:
h= 30Mtr,h =33Mtr, d=30Mtr , Asl=0.02, =7, bw=7 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 2827.43 Hence EIRP[T]/EIRPth= 1995.26/ 2827.43=0.70
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)h' (B2) d (B2)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz mtr mtr
Opeartor2/B2 17 7 7 17 0.02 15 30 46 0 10 0 2300 35 30
Total Tilt -
Operator
As h(Height of 11th floor-33mtr)>h-d*Tan(+1.129*bw),so accessibility category will be chosen as category 2
DoT Formula
Tower Type
Applicable to Accessibility Category
If f>2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
B1,B2,B3,.Bn 3 (determine by: h< h-d tan(+1.129bw)
Lesser of (Condition
1,Condition 2)
Calculation
76207.06
2827.43
2827.43
22hAsl
2d
-
Overall EIRP/EIRPth calculation of floor 1st & 11th
(EIRP/EIRPth) at 1st floor = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2 Hence (EIRP/EIRPth) = 0.23+0.02 =0.25 [Within DoT limit , Result-Pass] (EIRP/EIRPth) at 11th floor = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2 Hence (EIRP/EIRPth) = 6.29+0.70 =6.99 [Exceeding DoT limit , Result-Fail] Similar calculations made for rest of the floors.
-
EIRP/EIRPth Calculation on Ground
Ground level
-
Case 1: RTT (Antenna installed on a roof top tower On the terrace of a building)
Tower height=24m
B0
Ground
B1
B2
OP1,h= 9m,worst sector antenna height
OP2,h= 15m,worst sector antenna height
-
Operator1: EIRPth calculation at Ground
Formula
Example:
h= 24mtr,Asl=0.02, =8, bw=6.5 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 9778.83 Hence EIRP[T]/EIRPth= 8003.71 / 9778.83 =0.82
As it is a shared site, similar calculation are made for the other operator2 and total ratio calculated as under: (EIRP/EIRPth) = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz
Opeartor1 16 8 6.5 17 0.02 15 24 46 0 10 0 900
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f=400-2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
Ground Level 1 Lesser of (Condition
1,Condition 2)
Calculation
34293.18
9778.832818
34293.18
222000
hAsl
f
2
129.1sin
2
2000
bw
hf
-
Operator2: EIRPth calculation at Ground
Formula
Example:
h= 30mtr,Asl=0.02, =7, bw=7 Applying formula as above & taking minimum of condition1 & condition2 ,EIRPth comes as = 37237.46 Hence EIRP[T]/EIRPth= 1995.26/ 37237.46=0.05
Antenna GainVertical -
bw
Side Lobe
Attenuation
Side Lobe
Attenuation
Building
Height
Antenna
Height
AGL(h)
Tx PowerCombiner
Loss
RF Cable
LengthUnit Loss
Frequency
(f)
(dBi) (Deg) (dB) Numerical factor mtr mtr (dBm) (dB) (m) (dB/100m) MHz
Opeartor2 17 7 7 17 0.02 15 30 46 0 10 0 2300
Total Tilt -
Operator
DoT Formula
Tower Type
Applicable to Accessibility Category
If f>2000MHz
Condition 1 Condition 2 Result
DoT Formula RTT/RTP,GBT/GBM
Ground Level 1 Lesser of (Condition
1,Condition 2)
Calculation
123442.85
37237.46
37237.46
22hAsl
2
129.1sin
2
bw
h
-
Overall EIRP/EIRPth at Ground
(EIRP/EIRPth) at Ground = (EIRP [T]/EIRPth) Op1 + (EIRP [T]/EIRPth) Op2 Hence (EIRP/EIRPth) = 0.82+0.05 =0.87 [Exceeded DoT limit , Result-Pass]
-
Case 2: GBT or GBM (Antenna installed on top of the tower)
OR
GBT GBM
h =Antenna height of worst sector
h =Antenna height of worst sector
-
Case 3: RTP(Antenna installed on a pole on the terrace of a building, Serving outside the building)
C2
C1
C3
C4
-
Case 4: RTP Antenna installed on an inaccessible Structure on rooftop Height Water tank, LMR etc.
C2
C1
C3
C4
-
Case 5: Wall mount- Antenna installed on an inaccessible building Wall
-
Self Certification Calculation
-
OSS SNAPSHOT PROCESS
-
Mitigation Techniques for EMF
Case 1 Non compliance by any one of sector.
Solution 1 - Reduce the power levels to make site compliance and perform EMF measurement again by broadband method.
Case 2 Non Compliance even after reducing the power levels,
Solution 2 - Change the Antenna locations to make site compliance and perform EMF measurement again by broadband method.
Case 3 Non Compliance even after changing the Antenna pole locations,
Solutions 3 - Shut down the non-compliance sector and perform EMF measurement again by broadband method.
Tracker: A tracker needs to be maintained for such cases and circulate to all stake holders. (Tracker format to be discussed).
Observation: During the measurement, the site is non-compliance with respect to threshold limits defined by DoT due to high transmitting power of eNB. High power level is set may be due to business requirement or may be due to wrong setting in LSM-R.
Non-compliance of site due to any one sector during the measurement.
-
Mitigation Techniques for EMF
Case 1 Non compliance by any one of sector of Other Operator,
Solution 1 Inform to Concern Operator to reduce the power levels to make site compliance
Case 2 Non Compliance even after reducing the power levels,
Solution 2- Proposed to Change the Antenna Locations to make site compliance
Case 3 Non Compliance even after changing the Antenna pole locations,
Solution 3- Ask other operator to shut down the non-compliance sector
Tracker: A tracker needs to be maintained for such cases and circulate to all stake holders. (Tracker format to be discussed).
Observation: The engineer will perform the narrow band test for non compliant sites to identify the problematic sectors of other operator.
Non-Compliance of site due to other operator antenna pole /location.
-
Mitigation Techniques for EMF
Solution: To change the Antenna azimuth or Pole location in such a way that antenna should not face directly to any nearby/Own building.
Observation: site is non-compliance with respect to threshold limits defined by DoT, due to wrong azimuth/direction of antenna.
Solution 1: Pay the penalty and perform the EMF test again. If found non-compliance then apply mitigation techniques and perform the EMF test again. Take the necessary action to make the site compliant as mentioned in mitigation techniques.
Solution 2: Reduce the power levels to minimum before DoT visit to the site to make the site compliant. For this prior intimation of DoT visit needs to given to all stake holders for necessary action.
Observation: After complaint lodged by society/individual on DoT portal for hazardous radiations due to site/tower, DoT will visit the location and perform the EMF measurement. If site found non compliant then DoT will issue a notice to respective operator/operators.
Non Compliance due to wrong azimuth/direction of Antenna.
Non-Compliance due to new building construction near to site after EMF certification.
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Broadband Measurement process using NARDA SRM 3006
NARDA SRM-3006 is the tool used for EMF measurements.
The SRM-3006 (Selective Radiation Meter) is a handy-sized Broadband/Frequency selective measuring system for safety analysis and environmental measurements in high frequency electromagnetic fields in the frequency range from 9 kHz to 6 GHz.
SRM-3006 measuring system comprises of following components:
SRM-3006 Base unit :
Spectrum Analyzer with built- in GPS. The operating frequency range of base unit is from 9 KHz to 6 GHz.
Display the EM radiation measurements in terms of Electric field (V/m), Magnetic Field (A/m) and Power Density (W/m2)
Isotropic Antenna
SRM-3006 Tools PC software
Isotopic Antenna
Spectrum Analyzer
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SRM-3006 Connection set up Caution Before starting any measurements,
Ensure that all the mobile phone must be switched off while taking EMF measurements because when a mobile phone starts a cell handover, it generates quite strong signal in proximity of antenna and hence this small event dominate the actual EMF radiations coming from the BTSs and unnecessarily will lead to overestimation of radiation values.
The Isotropic antenna needs to be placed on Tripod at an height of 2 mtr from the ground level.
The Narda isotropic antenna can be connected to the base unit either directly or via 1.5m RF cable (In case if it is used with Tripod) as per requirement in the field from TERM Cell
Fitting a Narda antenna directly on the Basic Unit
Connecting a Narda antenna to the Basic Unit using a Narda cable The SRM-3006 is switched off. Stand the Basic Unit up in a vertical position. Place the N connector of the antenna onto the N connector of the Basic Unit. Screw the coupling nut of the antenna N connector slowly on to the Basic Unit N connector Place the RF Connector (12 Pin Connector) on to the multipin connector on the Basic Unit so
that the red mark on the control cable plug is aligned with the notch in the multipin connector.
Push the control cable plug into the connector using the locking sleeve until the plug lock engages. The Narda antenna is connected.
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Narda SRM 3600 Tool
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Narda antenna to the Basic Unit using a Narda RF cable
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Device Display & Control Panels
No. Element Functions/Description
1 LCD Panel Screened, high-resolution liquid crystal display.
2 GPS receiver GPS receiver antenna area.
Do not attach any metallic stickers to this area.
3 Vertical
softkeys
Context-dependent, operating mode and function
selection, changing settings.
4 Microphone For recording voice comments.
5 Keypad and
rotary control
Navigation, changing settings, entering values, confirming
or cancelling entries.
6 Status display LED green: device is ready for use. LED red: device is initializing or device error.
7 Charging
indicator
LED red: Battery is charging. LED green: Charging cycle finished or AC adapter / charger still connected to device charging socket.
8 On/Off key Switches device on or off (hold down key).
9 Horizontal
softkeys
Context-dependent, function selection, changing settings.
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Device side panel with antenna / cable connectors
No. Element Functions/Description
1 Multi-pin connector 12-pole socket for connecting the control cable (for
automatic recognition of antenna and cable when
using a Narda antenna or Narda cable).
2 N connector Antenna connecting socket
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Device side panel with external connectors
No. Element Functions/Description
1 Earphone socket For connecting an earphone for listening to saved
voice comments.
2 Optical connector For connecting optical cables for on-site device
Communications
3 USB, Mini-B type For connection to a computer (PC).
4 Charging socket For connecting to an external AC adapter / charger
(nominal voltage: 9 V)
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Rotary control and keys
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Copyright and Confidentiality
Copyright 2013, SAMSUNG Electronics Co., Ltd. SAMSUNG Electronics reserves the right to make changes to the specifications of
the products detailed in this document at any time without notice and obligation to notify any person of such changes. Information
in this document is proprietary to SAMSUNG Electronics Co., Ltd. No information contained here may be copied, translated,
transcribed or duplicated by any form without the prior written consent of SAMSUNG Electronics.
Thank You
Gamsahapnida