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Publication Number: FHWA-HRT-10-037
Date: October 2010

Step Frequency Ground Penetrating Radar Characterization and Federal Evaluation Tests

Appendix E: Certified Laboratory Test Report: Follow-up Test

The following certified laboratory test report contains supporting documentation and results of the testing performed for the research initiative in this report. The authors of this current study have not edited or changed the test report in this appendix except to remove more than one instance of company logo within the document and to format the report.

logo

Test report no. :133876/2

Item tested : B1823CH

Type of equipment : 3d-radar Geoscope

Client : 3d-Radar AS

Nemko is granted accreditation by
Norwegian Accreditation under
registration number TEST 033.

FCC test firm registration # 994405

Federal Highway Administration/Department of Transportation

Step Frequency Ground Penetrating Radar

Characterization and federal Compliance Tests

 

2009-10-27

 

Authorized by : ..............................................

Geir Antonsen

Technical Verificator


Contents

1. GENERAL INFORMATION

2. TEST INFORFMATION

3. OTHER COMMENTS

4. EMISSION MEASUREMENTS

5. TEST EQUIPMENT AND ANCILLARIES USED FOR TESTS

6. PHOTO OF EUT AND TEST SET UP

GENERAL INFORMATION

Testhouse Info

Name: Nemko A/S

Address: Nemko Kjeller
Instituttvn 6, Box 96
N-2027 Kjeller, NORWAY

Telephone: +47 64 84 57 00

Fax: +47 64 84 57 05

E-mail: comlab@nemko.com

FCC test firm registration #: 994405

Number of Pages: 93

Client Information

Name: 3d-Radar AS

Address: KlÂ: buveien 196 B,

N-7037 Trondheim, Norway

Telephone: + 47 72 89 32 02

E-mail egil@3d-radar.com

Contact:

Name: Egil Eide

Phone: + 47 72 89 32 02

E-mail: egil@3d-radar.com

Manufacturer (if other than client)

Name:

Address:

Telephone:

Fax:

Contact:

Name:

Phone:

E-mail:

TEST INFORFMATION

Tested Item

Name :

3d-Radar Geoscope

Model/version :

B1823CH

Serial number :

6052

Hardware identity and/or version:

-

Software identity and/or version :

-

Frequency Range :

140 MHz – 3 GHz

Type of Power Supply :

12 V dc

Desktop Charger :

No

 Description of Tested Device(s)

Step frequency Geo Radar.

Test Environment

Normal test condition at the test sites

Temperature:

Outdoor: 10 - 15 oC, Indoor: 22,1 - 22,6 oC

Relative humidity:

38,2 %

Normal test voltage:

237,3 – 240,0 V ac

The values are the limit registered during the test period.

Test Period

Item received date: 2009-09-10

Test period: 2009-09-10 – 2009-09-11

Standards and Regulations

Federal Highway Administration/Department of Transportation

Step Frequency Ground Penetrating Radar Characterization and Federal compliance Tests

July 2, 2009

Test Engineer(s)

Egil Hauger

Additional information

Test Methods

Described in the relevant basic standards.

Test Equipment

List of used test equipment, see clause 7.

THIS TEST REPORT APPLIES ONLY TO THE ITEM(S) AND CONFIGURATIONS TESTED.

TESTED BY : DATE: 2009-10-20

Test Engineer

Nemko Group authorizes the above named company to reproduce this report provided it is reproduced in its entirety and for use by the company's employees only. Any reproduction of parts of this report requires approval in writing from Nemko Group.

Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. Nemko Group accepts no responsibility for damages suffered by any third party as a result of decisions made or actions based on this report.

OTHER COMMENTS

General:

The outdoor test was performed in rural area with no surroundings reflecting objects, see photo on fig 29 to 31.

The indoor test was performed in a semi-anechoic chamber with dimensions 22 Â' 13 Â' 9,5 meters (l Â' w Â' h m), see photo on fig 32.

EUT (Equipment Under Test):

EUT size 2,5x0,75x0,75 m

See photo fig 30 to 33.

List of ports:

Signal ports: Signal cable

Internal antenna

Power ports: 12 V dc

EMISSION MEASUREMENTS

Outdoor test

Test set up:

The outdoor measurements were performed in rural area with no reflecting objects in the surroundings, see photo on fig 29 to 31. The weather was dry with temperature around 12-15 oC. The ground was sand with some smaller stones.

The test equipment was more that 5 m away from the radar.

All tests were stored as data file with frequency and EIRP in dBm.

Effective radiated power was calculated using Friis free space transmission formula with a distance of 3 m. This equals the formula presented in the test specification:

EIRP (dBm) = dBµV/m – 95,2

Test antennas used:

50 – 200 MHz: Biconic antenna

200 – 1000 MHz: Log.periodic antenna

1000 – 6000 MHz: Horn antenna

All antennas were calibrated by National Physical Laboratory NPL UK.

The conversion factors converting the measured values to EIRP in dBm including cables and pre.amplifier were calibrated before the test and stored in the test equipment.

Measurement instruments set up: Resolution bandwidth 1 MHz

Video bandwidth 3 MHz

Sweep time 15 sec

Detector Peak and RMS

All test files with frequency and EIRP are enclosed.

Some of the files with the most interesting frequency spectra are converted to Excel and shown below.

See fig 1 to 13.


Test file notation:

 

 

 

 

 

 

File no

File no

Test

Config

Freq

Ant

Az

Pol

Peak

RMS

A1

Ambient

50-200 MHz

Bicon

0

V

003

004

A2

No notching

50-200

Bicon

0

V

005

006

A3

Notch A1

50-200

Bicon

0

V

007

008

A4

Notch A2

50-200

Bicon

0

V

009

010

A5

Notch A3

50-200

Bicon

0

V

011

012

A6

Ambient

50-200

Bicon

90

H

002

001

A7

No notching

50-200

Bicon

90

H

019

020

A8

Notch A1

50-200

Bicon

90

H

018

017

A9

Notch A2

50-200

Bicon

90

H

015

016

A10

Notch A3

50-200

Bicon

90

H

014

013

A11

Ambient

200-1000 MHz

Log.per

0

V

032

031

A12

No notching

200-1000

Log.per

0

V

040

039

A13

Notch A1

200-1000

Log.per

0

V

037

038

A14

Notch A2

200-1000

Log.per

0

V

035

036

A15

Notch A3

200-1000

Log.per

0

V

033

034

A16

Ambient

200-1000

Log.per

90

H

021

022

A17

No notching

200-1000

Log.per

90

H

024

023

A18

Notch A1

200-1000

Log.per

90

H

025

026

A19

Notch A2

200-1000

Log.per

90

H

028

027

A20

Notch A3

200-1000

Log.per

90

H

029

030

A21

Ambient

1-6 GHz

Horn

0

V

041

042

A22

No notching

1-6

Horn

0

V

043

044

A23

Notch A1

1-6

Horn

0

V

046

045

A24

Notch A2

1-6

Horn

0

V

047

048

A25

Notch A3

1-6

Horn

0

V

050

049

A26

Ambient

1-6

Horn

90

H

080

079

A27

No notching

1-6

Horn

90

H

078

077

A28

Notch A1

1-6

Horn

90

H

075

076

A29

Notch A2

1-6

Horn

90

H

074

073

A30

Notch A3

1-6

Horn

90

H

071

072

A31

Ambient

1-3

Horn

0

V

059

060

A32

No notching

1-3

Horn

0

V

058

057

A33

Notch A1

1-3

Horn

0

V

055

056

A34

Notch A2

1-3

Horn

0

V

054

053

A35

Notch A3

1-3

Horn

0

V

051

052

A36

Ambient

1-3

Horn

90

H

062

061

A37

No notching

1-3

Horn

90

H

 063

064

A38

Notch A1

1-3

Horn

90

H

 066

965

A39

Notch A2

1-3

Horn

90

H

 067

068

A40

Notch A3

1-3

Horn

90

H

070

069

A41

No notching

1,164-1,240 GHz

Horn

0

V

 088

087

A42

No notching

1,559-1,610

Horn

0

V

 085

086

A43

No notching

1,165-1,240

Horn

90

H

 082

081

A44

No notching

1,559-1610

Horn

90

H

 083

084

Figure 1. Graph. Ambient emissions between 50 MHz and 200 MHz are presented corresponding to the outdoor test configuration used for follow-up testing.

Fig 1

Figure 2. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (outdoor test configuration). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this vertically polarized measurement.

Fig 2

Figure 3. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 200 MHz to 1,000 MHz, (outdoor test configuration). Peak measurements are observed to be relatively stable between -30 dBm and -50 dBm. RMS emissions are observed to be relatively stable at approximately -70 dBm with a few elevated emission features observed intermittently. No notching is implemented for this vertically polarized measurement.

Fig 3

Figure 4. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 1,000 MHZ to 6,000 MHz, (outdoor test configuration). Peak measurements show a distinct change from consistently elevated emissions at approximately -40 dBm below 3,000 MHz to approximately -50 dBm above 3,000 MHz. RMS measurements are relatively stable throughout the entire measured range and average around -62 dBm. No notching is implemented for this vertically polarized measurement.

Fig 4

Figure 5. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (outdoor test configuration). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this horizontally polarized measurement. No notching is implemented for this horizontally polarized measurement.

Fig 5

Figure 6. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 200 MHz to 1,000 MHz, (outdoor test configuration). Peak measurements are observed to be relatively stable between -30 dBm and -40 dBm. RMS emissions are observed to be relatively stable at approximately -65 dBm with a few elevated emission features observed intermittently. No notching is implemented for this horizontally polarized measurement.

Fig 6

Figure 7. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 1,000 MHZ to 6,000 MHz, (outdoor test configuration). Peak measurements show a distinct change from consistently elevated emissions at approximately -40 dBm below 3,000 MHz to approximately -50 dBm above 3,000 MHz. RMS measurements are relatively stable throughout the entire measured range and average around -62 dBm. No notching is implemented for this horizontally polarized measurement.

Fig 7

Figure 8. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (outdoor test configuration). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. Notch configuration A1 is implemented for this vertically polarized measurement. A notch between 160 and 175 MHz is apparent in the peak measurement data.

Fig 8

Figure 9. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 200 MHz to 1,000 MHz, (outdoor test configuration). Peak measurements are observed to be relatively stable between -30 dBm and -40 dBm. RMS emissions are observed to be relatively stable at approximately -65 dBm with a few elevated emission features observed intermittently. Notch configuration A1 is implemented for this vertically polarized measurement. Multiple notches are apparent in the peak measurement data.

Fig 9

Figure 10. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 1,000 MHZ to 6,000 MHz, (outdoor test configuration). Peak measurements show a distinct change from consistently elevated emissions at approximately -40 dBm below 3,000 MHz to approximately -50 dBm above 3,000 MHz. RMS measurements are relatively stable throughout the entire measured range and average around -62 dBm. Notch configuration A1 is implemented for this vertically polarized measurement. Multiple notches are apparent in the peak measurement data.

Fig 10

Figure 11. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (outdoor test configuration). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. Notch configuration A1 is implemented for this horizontally polarized measurement. A notch between 160 and 175 MHz is apparent in the peak measurement data.

Fig 11

Figure 12. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 200 MHz to 1000 MHz, (outdoor test configuration). Peak measurements are observed to be relatively stable between -30 dBm and -40 dBm. RMS emissions are observed to be relatively stable at approximately -65 dBm with a few elevated emission features observed intermittently. Notch configuration A1 is implemented for this horizontally polarized measurement. Multiple notches are apparent in the peak measurement data.

Fig 12

Figure 13. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 1,000 MHZ to 6,000 MHz, (outdoor test configuration). Peak measurements show a distinct change from consistently elevated emissions at approximately -40 dBm below 3,000 MHz to approximately -50 dBm above 3,000 MHz. RMS measurements are relatively stable throughout the entire measured range and average around -62 dBm. Notch configuration A1 is implemented for this horizontally polarized measurement.

Fig 13

Indoor test

Test set up:

The test is performed in a semi anechoic chamber with a size of 22 Â' 13 Â' 9,5 meters
(l Â' w Â' h).

The EUT was placed on a table with a height of 80 cm. on a turntable. Absorbers with ferrite tiles were placed below the table to prevent reflection from the floor. The receiver antenna height was 2 m, both with horizontal and vertical polarisation with a distance of 3 m to EUT. The EUT was rotated in 30 dgr step from 0 to 180 dgr., see photo on fig 32.

Quasi-Peak measurement with 3 m test distance:

120 kHz BW

Frequency MHz EUT Az Polarization HP/VP   Level dBm
50

0

VP

-73,6

60

0

VP

-67,2

60,95

180

VP

-62,2

70

0

VP

-73,9

75

0

VP

-79,3

80

0

VP

-80,9

90

0

VP

-71,5

100

0

VP

-70,8

110

0

VP

-78,5

120

0

VP

-77,6

130

0

VP

-76,9

158

0

VP

-54,7

160

0

VP

-55,3

160

180

VP

-54,8

180

0

VP

-54,9

180

180

VP

-54,5

50

90

HP

-86,5

60

90

HP

-78,3

70

90

HP

-87,2

75

90

HP

-89,1

80

90

HP

-85,9

90

90

HP

-81,7

100

90

HP

-72,3

110

90

HP

-76,5

120

90

HP

-84,7

130

90

HP

-82,7

160

90

HP

-56,4

180

90

HP

-53,8


Sveep measurement:

Test # Configuration Frequency Band Antenna RBW VBW Sweep Time Az Pol Datafile (Peak) Datafile (RMS)
B1 Ambient 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec - V 100 101
B2 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 0 V 102 103
B3 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 30 V 104 105
B4 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 60 V 106 107
B5 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 90 V 108 109
B6 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 120 V 110 111
B7 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 150 V 112 113
B8 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 180 V 114 115
B9 Ambient 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec - H 130 131
B10 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 0 H 128 129
B11 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 30 H 126 127
B12 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 60 H 125 124
B13 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 90 H 122 123
B14 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 120 H 120 121
B15 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 150 H 118 119
B16 No notching 50 MHz - 200 MHz Biconic 1 MHz 3 MHz 15sec 180 H 117 116

See fig 14 to 28.

Figure 14. Graph. Ambient emissions between 50 MHz and 200 MHz are presented corresponding to the indoor test configuration used for follow-up testing.

Fig 14

Figure 15. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 0-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this vertically polarized measurement.

Fig 15

Figure 16. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 30-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this vertically polarized measurement.

Fig 16

Figure 17. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 60-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this vertically polarized measurement.

Fig 17

Figure 18. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 90-degree orientation). Intentional emissions observed above 140 MHz have less structure than at other orientations, while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this vertically polarized measurement.

Fig 18

Figure 19. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 120-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this vertically polarized measurement.

Fig 19

Figure 20. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 150-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this vertically polarized measurement.

Fig 20

Figure 21. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 180-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this vertically polarized measurement.

Fig 21

Figure 22. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 0-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this horizontally polarized measurement.

Fig 22

Figure 23. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 30-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this horizontally polarized measurement.

Fig 23

Figure 24. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 60-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this horizontally polarized measurement.

Fig 24

Figure 25. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 90-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this horizontally polarized measurement.

Fig 25

Figure 26. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 120-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this horizontally polarized measurement.

Fig 26

Figure 27. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 150-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this horizontally polarized measurement.

Fig 27

Figure 28. Graph. Peak and RMS SF GPR emission measurements are shown for the range from 50 MHz to 200 MHz, (indoor test configuration, 180-degree orientation). Structured intentional emissions are observed above 140 MHz while no clear pattern in the emissions data is observed below 140 MHz. No notching is implemented for this horizontally polarized measurement.

Fig 28.

TEST EQUIPMENT AND ANCILLARIES USED FOR TESTS

To facilitate inclusion on each page of the test equipment used for related tests, each item of test equipment and ancillaries such as cables are identified (numbered) by the Test Laboratory.

No

Instrument/Ancillary

Type

Manufacturer

Ref. No.

1

Test receiver

ESN

R&S

LR 1237

2

Biconical antenna

3104C

EMCO

LR 1262

3

Log.per antenna

3146

EMCO

LR 1221

4

Horn antenna

3115

EMCO

LR 1330

5

Spectrum analyzer

FSP

R&S

LR 1551

6

Pre.amp

8447F

HP

TF 03305

7

Pre.amp

8449B

HP

TF 03475

8

Cable

Sucoflex 106 6 m

Suhner

PHOTO OF EUT AND TEST SET UP

Figure 29. Photo. Photograph of outdoor test configuration, including B1823 SF GPR antenna and horn measurement antenna (side view). The SF GPR antenna is suspended above the ground by two white saw horses. The ground surface is gravel. A lake is visible in the background. The picture is taken from the side of the measurement antenna and the SF GPR antenna. The side of the measurement antenna is visible in the right of the picture while the end of the SF GPR antenna suspended from the two saw horses is visible on the left of the picture.

Fig 29 Test set up outdoor measurement

Figure 30. Photo. Photograph of outdoor test configuration, including B1823 SF GPR antenna with its long axis in line with the measurement direction of the white biconic measurement antenna. The SF GPR antenna is suspended above the ground by two white saw horses. The ground surface is gravel. A lake is visible in the background. The picture is taken from the side of the measurement antenna and the SF GPR antenna.

Fig 30 Test set up outdoor measurement

Figure 31. Photo. Photograph of outdoor test configuration, including the yellow trapezoidal B1823 SF GPR antenna and white horn measurement antenna sitting about four feet above the ground on a three legged yellow tripod (boresight view). The SF GPR antenna is behind the measurement antenna and resting perpendicular to its line of sight. The SF GPR antenna is suspended above the ground by two white saw horses. The ground surface is gravel. A lake is visible in the background. The picture is taken from behind the measurement antenna with the SF GPR antenna on the far side of the measurement antenna.

Fig 31 Test set up outdoor measurement

Figure 32. Photo. Photograph of indoor test configuration, including anechoic chamber. The yellow trapezoidal SF GPR unit is resting on a set of grey blocks sitting on a beige floor. The walls are patterned with white square emissions absorbing blocks.

Fig 32 Test set up indoor measurement

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