CMR3 Calibrated Induction Loop Measuring Receiver for Audio Analysers
Description
Ampetronic
Calibrated Induction Loop Measuring Receiver for Audio Analysers
The CMR3 calibrated receiver is designed for measuring the performance of audio induction loop systems. The audio output is within ±0.25dB over the frequency range and where used with a suitable audio analyser such as the Minilyser from Neutrik Ltd, the frequency response and field distribution of the magnetic field from any audio induction loop system can be plotted.
Calibrated to provide 0dBu output for a field strength of 400mA/m RMS, in accordance with the international induction loop standard IEC60118-4 it is an essential tool for anyone wishing to assess loop system performance for analyses or certification.
Features
-
Enables easy assessment of the system to the international induction loop standard IEC60118-4
-
Accuracy to within 0.5dB
-
5 year warranty
-
Compatible with most audio analysers
-
Measure loop coverage and spill
-
Assess frequency dependent loss due to metal structures
-
Certification of an induction loop system to IEC60118-4
Specification
Magnetic field response
|
400mA/m RMS |
0dBu audio output (0.775V) |
|
Field strength |
Coil orientation vertical (indicated by |
Frequency response
|
50Hz to 8kHz |
±0.25dB |
|
30Hz and 14kHz |
-3dB |
|
A-weighting filter |
EN61672-1:2003 sound level meter (Switched) |
Gain stability
|
Output variation over battery life |
<0.1dB |
|
Output variation due to loading |
<0.1dB |
|
Output variation over temperature range |
<0.25dB |
|
Overall gain variation |
<0.5dB |
Output
|
Output type |
Active Balanced |
|
Load impedance |
>600Ω |
|
Connector |
3.5mm stereo jack socket |
Power
|
Battery |
2 x AA alkaline |
|
Battery life |
Approximately 200 hours |
|
Battery condition |
OK when LED illuminated |
Physical
|
Dimensions |
62 w x 26 d x 112 h (mm) |
|
Weight |
84g (excluding batteries) |
|
Temperature range |
-10°C to +45°C |
Accessories
3.5mm stereo plug to XLR plug adaptor cable supplied (1.5m length), audio cables for simple interfacing of audio devices to loop systems available seperately (see product SCC)
Standards Compliance
The CMR3 is CE marked to all relevant safety and EMC standards
Ashton Audio in conjunction with Ampetronic can design your induction loop system for you. Simple induction loop designs are free, complex array systems will be charged for at a nominal rate. You can request a design through our 'Contact Us' Enquiry Form.
l
