- DL manuals
- LAPLACE INSTRUMENTS
- Antenna
- RF300
- User Manual
LAPLACE INSTRUMENTS RF300 User Manual
Summary of RF300
Page 1
Laplace instruments ltd rf300 user guide page 1 laplace instruments ltd rf300 large loop antenna user guide serial number 9072 issue 5 may 2010
Page 2
Laplace instruments ltd rf300 user guide page 2 index introduction 3 packing list 3 assembly 5 calibration loop 12 calibration 13 operation 14 in use with the emcengineer software 14 appendix a...Calibration data 16 appendix b… cispr16 20
Page 3
Laplace instruments ltd rf300 user guide page 3 introduction the rf300 large loop antenna has been developed to meet the requirements of en55015, section 9.9.1, which refers to cispr16-1-4, section 4.6.1. This specifies the limits for magnetic field induced current for luminaires with lamp operating...
Page 4
Laplace instruments ltd rf300 user guide page 4 qty item 3 large loops fitted with connectors at each end 4 corner posts 4 base extensions 4 post stabilisers 1 central pillar 1 switch unit 1 short co-ax patch cable fitted with bnc connectors 3 loop transducers 5 tiewraps 8 1¾ x 8 wood screws 8 1” x ...
Page 5
Laplace instruments ltd rf300 user guide page 5 assembly 1. Establish an appropriate area to erect the rf300. This needs to be a clear area at least 4m square with a flat floor and a ceiling height of at least 3m. 2. In the centre of this area, stand the central pillar and fit the base extensions as...
Page 6
Laplace instruments ltd rf300 user guide page 6 figure 4 loop assembly figure 4 loop assembly 4. Prepare the 3 loops. The configuration of these loops is as shown in fig 4 and fig 5. The connectors on each end of the loop are mated with the sockets either side of each loop transducer. The retaining ...
Page 7
Laplace instruments ltd rf300 user guide page 7 5. The first loop to mount is the horizontal loop. To mount the loops, at least two people are required. Do not try to do this single handed....It will only end in tears. Mount the loop in the recesses at the top of each corner post with the loop trans...
Page 8
Laplace instruments ltd rf300 user guide page 8 install first vertical loop. Note orientation of central post. Position transducer near bottom figure 7 mounting of second loop install first vertical loop. Note orientation of central post. Position transducer near bottom figure 7 mounting of second l...
Page 9
Laplace instruments ltd rf300 user guide page 9 7. The final loop is now fitted inside the other two. See fig 10. This fits in the upper slot in the central pillar, between the corner post ‘ears’ and under the other vertical loop at the top. Again arrange the loop so the transducer is close to the c...
Page 10
Laplace instruments ltd rf300 user guide page 10 8. The loops can now be adjusted for best shape and position. Generally the vertical loops will tend to sag into the lower half of the antenna. These are held up in position by using the tiewraps as shown in fig 8 on each corner post to take some on t...
Page 11
Laplace instruments ltd rf300 user guide page 11 figure 11 connections to selector unit to analyser horiz (x) vert (y) vert (z) loop transducers ferrite absorbers are at this end of cables select loop using link cable figure 11 connections to selector unit to analyser horiz (x) vert (y) vert (z) loo...
Page 12
Laplace instruments ltd rf300 user guide page 12 calibration loop the rf300c calibration loop is manufactured to comply with cispr16. Full details of the use of this loop are provided in this standard..
Page 13
Laplace instruments ltd rf300 user guide page 13 calibration data see appendix a the calibration data for each loop is virtually identical. The following details therefore apply to all three axes, although full data for each axis is given in the appendix. For reference, the ‘ideal’ curve is shown in...
Page 14
Laplace instruments ltd rf300 user guide page 14 operation details of the measurements and limits are given in en55015, section 4.4. A copy of this should be consulted if performing compliance tests. The uut should be mounted on a wooden frame or table in the centre of the antenna. The position is n...
Page 15
Laplace instruments ltd rf300 user guide page 15 attenuator can be automatically compensated for in the software by adjusting the pre- amp settings on the screen. 8. If the background and the product is ‘quiet’, and especially at frequencies above 20mhz, use 0db attenuation..
Page 16
Laplace instruments ltd rf300 user guide page 16 appendix a calibration data 1. Cispr16 ‘ideal’ plot 2. Calibration data. 3. Rf300 actual sensitivity plots and rf300 correction plot (antenna factor).
Page 17
Laplace instruments ltd rf300 user guide page 17 en55015 standard antenna response cispr16 lla (2m diameter) 60 65 70 75 80 85 90 95 100 105 110 0.01 0.1 1 10 100 freq (mhz) v a li d a ti o n f a c to r (d b oh m s).
Page 18
Laplace instruments ltd rf300 user guide page 18 calibration data calibration sources laplace instruments ltd, rf300c calibration loop to cispr16, annex c5. Laplace instruments ltd, sa1002 spectrum analyser s/n 1010 calibration: laplace: 16.03.2009 marconi tf2016a signal generator, s/n 118032/004 ca...
Page 19
Laplace instruments ltd rf300 user guide page 19 actual output plots for the loops output output rf300 s/n 9072 0 10 20 30 40 50 60 70 80 0 0 1 10 100 frequency (mhz) o u tpu t ( d b u v) antenna factor antenna factor s/n 9072 -30 -25 -20 -15 -10 -5 0 5 10 15 0.01 0.10 1.00 10.00 100.00 frequency (m...
Page 20
Laplace instruments ltd rf300 user guide page 20 appendix b technical report laplace instruments ltd january 2010 rf300 large loop antenna, an analysis of changes to the standards these changes are due to the amendments to cispr15 and cispr16 the latest versions are now ….. Cispr15:2006 + a2:2009 an...
Page 21
Laplace instruments ltd rf300 user guide page 21 note 2 cispr15 gave the verification data as a plot of loop current in dbua vs frequency for the standard test signal (1v, open circuit voltage with a source impedance of 50ohm). This seems to be a straightforward method, especially as the limits are ...