Laplace EMC logo
 
EMC Primer
EMC Introduction
What Standards ?
Application Notes
EMCEngineer Software
 
New Products
Cells & Chambers
Emissions Test
Immunity Test
Harmonics & Flicker
Probes & Field Meters
Reference Source
RF Hazard Sensor
 
Filter Products
Data Loggers
Calibrators
 
Distributors
Feedback
 
Visiting
Site Map
Product Index
PDF Files
  EMC From Laplace

Product Details

EMC Pre-selectors
 

Automatic and Manual Versions:

F900: Manual control, push button selection.Passive design requires no power supply.

RF910: Automatic control via serial interface. Includes software utility for windows and detailed command set to enable users to create own macros. Front panel control for manual overide.


Strong broadband signals encountered during mains conducted compliance tests are a common cause of spectrum distortion and compression leading to false results on spectrum analysers. For this reason, CISPR16 specifies the use of pre-selectors.

The function of a pre-selector is to split the incoming signal into several frequency bands using parallel bandpass filters. Each band is switched in as the spectrum analyser scans the range 150KHz to 30MHz.

This helps avoid the distortion and compression problems caused by the direct input of a strong broadband signal to the analyser.

The performance of the analyser is thus enhanced and the overall system is similar to that of a measuring receiver, as required by CISPR16.

Typical sources that cause broadband noise are electric motors, power controllers, lighting controllers and industrial plant.

Specification RF900 RF910
Frequency range 150KHz-30MHz 150KHz-30MHz
Input/output impedance 50 ohm 50 ohm
Input/output connectors BNC BNC
Number of filter bands 7 8
Pass band flatness 2dB 1dB
Insertion loss 4dB 4dB
Stop band attenuation >40dB >40dB
Filter performance 5 + 9 pole 5 + 5 pole
Control Manual push button switches Auto mode: serial interface
Manual mode: Rotary switch
Indication Switch tell-tales LED indicators
Max signal level +23dBm +30dBm
Power None required 12V DC (mains adaptor supplied)
Size (W x H x D) 31 x 11 x 26 31 x 11 x 26
Weight 3Kg 3Kg

Laplace SA1000 EMC Analyser When used with this analyser, operation of the RF910 is completely automatic and transparent to the user.

 

View Adobe PDF FilePDF

 

LAPLACE INSTRUMENTS LTD
3B, Middlebrook Way,
Holt Road, Cromer,
Norfolk, NR27 9JR, UK		 Tel: + 44 (0)1263 515160
Fax: + 44 (0)1263 512532
E-mail:tech@laplace.co.uk
 
EMC Testing ICON

If you have any comments, suggestions regarding our site or  require further product  information please use the feedback form

Revised: 06-Jan-2003
Copyright © Laplace Instruments 1998, all rights reserved