GRAS 45AA Telephone Test Head

  •  Part Number: GRAS 45AA
     Category: GRAS Sound & Vibration
  •  View: 5
     Status: Available

  • IEC 60318 or IEC 60711 depending on configuration

    The GRAS 45AA Telephone Test Head is a tailor-made fixture for testing the acoustic performance of telephone handsets in accordance with international standards and recommendations. The design of the GRAS 45AA combines precision with a robust construction to ensure stability and reproducible test results with a minimum of acoustic interference.

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Product Information

Technology

When used with GRAS 43AD articitial ear or GRAS 43AE IEC 60711 ear simulator, and a GRAS 44AA/GRAS 44AB mouth simulator, it can be set up for testing telephone handsets in accordance with ITU-T recommendations.

Positioning of the mouth
Four different, detachable precision brackets are provided for mounting the Mouth Simulator according to the standardised positions shown in the table for speaking into a telephone. These positions are maintained to within an accuracy of 1 mm. Reference gauges are available for verifying this.

Speaking Position Recommendation
LRGP ITU-T Rec. P76
AEN ITU-T Rec. P76
HATS ITU-T P58
REF OREM A


Anti-vibration Mounts
The GRAS 45AA stands on four anti-vibration mounts to isolate it from extraneous vibrations which could otherwise lead to spurious measurement results.

Handset Alignment
The GRAS 45AA is provided with graduated guides and stops for aligning a telephone handset correctly in position over the Artificial Ear. Lateral guides are independently adjustable to cater for asymmetrical handsets.

Once aligned, an adjustable spring-loaded, padded clamp will hold the handset in position. As specified in some tests, an adjustable force may also be applied by adding a small mass to the measurement object.

Specifications

IEC Standard   According to relevant conference committee
ITU-T Recommendation   According to relevant conference committee
CE / RoHS / WEEE Compliance   Yes / Yes / Yes
Weight g / oz 2,300 / 81.13
Category
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