CMR3 Calibrated measuring receiver for audio analysers

CMR3 calibrated measuring receiver

Part code: TCMR03

The Ampetronic CMR3 calibrated hearing loop measuring receiver for audio analysers is designed for measuring the performance of audio induction loop systems. The audio output is within ±0.25 dB 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.

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Specifications

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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

Standards

The CMR3 is CE marked to all relevant safety and EMC standards

Downloads

NTI AppNote AFILS E UP32801-9 data sheet

CMR3 lo res UP12801-15 CMR3 handbook

Test Signals Zip file

Specifications (PDF)

Click here to open datasheet in a new tab



Specifications



Downloads



Book a demo

Design / Specify

CMR3 Calibrated measuring receiver for audio analysers

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.

Applications include

Measure loop coverage and spill
Assess frequency dependent loss due to metal structures
Certification of an induction loop system to IEC60118-4

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

Magnetic field response

400mA/m RMS	0dBu audio output (0.775V)
Field strength	Coil orientation vertical as indicated on unit

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 separately.

The CMR3 is CE marked to all relevant safety and EMC standards

NTI AppNote AFILS E UP32801-9 data sheet

CMR3 lo res UP12801-15 CMR3 handbook

Test Signals Zip file

hidden tab

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