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Related Manuals for G.R.A.S. 45CC
Summary of Contents for G.R.A.S. 45CC
- Page 1 Instruction Manual GRAS 45CC Headphone Test Fixture 45CC-1 to 45CC-12...
- Page 2 23 June 2016 Preliminary release 16 September 2016 First publication 45CC-9 to 45CC-12 configurations added, specs for 69CC-3 and 69CC-4 06 February 2018 added. Microphone assembly part numbers updated (p. 7-14) Copyright Notice © 20016-18 GRAS Sound & Vibration A/S www.gras.dk...
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Page 3: Table Of Contents
45CC-5 Mouth Simulator and Externally Polarized 1/2” Microphones ..........12 45CC-6 Mouth Simulator and Prepolarized 1/2” Microphones ..............13 45CC-7 Mouth Simulator, 60318-1 Ear Simulators and Ext. Pol. 1/2” Microphones .........14 45CC-8 Mouth Simulator, 60318-1 Ear Simulators, Prepolarized 1/2”Microphones ...........15 45CC-9 Externally Polarized 1/4” Microphones ..................16 45CC-10 Prepolarized 1/4”... -
Page 4: Quick Assembly Guide
Quick Assembly Guide The 45CC comes fully assembled and tested, however the user must mount the Ear Plate Assem- blies. For those who do not need a detailed instruction, the illustration below should be enough to get started. 1. Slide the ear plate assembly’s Rods into the Slots on the 45CC. -
Page 5: Introduction
Introduction Overview The 45CC Headphone Test Fixture is for testing of headphones and headsets. With a focus on accurate and reproducible test results, the test fixture can easily be adapted to many different headphone/headset designs and sizes. • Adjustable head dimensions: –... -
Page 6: The 45Cc Configurations
45CC-4 with IEC 60318-1 Ear Simulators and Prepolarized 1/2” Microphones 45CC configured with IEC 60318-1 ear simulators and 1/2” externally polarized or prepolar- ized microphones is primarily intended as a tool for QC and PL testing of headphones. Where the acoustical load from an ear simulator is required, the use of the IEC 60318-1 ear simulators also mean that testing according to IEC 60318-1 and ITU-T Recommendations P.57 is possible. - Page 7 45CC-11 with Mouth Simulator and Ext. Polarized 1/4” Microphones 45CC-12 with Mouth Simulator and Prepolarized 1/4” Microphones 45CC configured with 1/4” externally polarized or prepolarized microphones and the GRAS 44AA Mouth Simulator is primarily intended as a tool for QC and PL testing of communication headsets.
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Page 8: Delivered Items
1/2" Microphone Holder 2 x GR2013 p i n B a c k G u i d e *The parts are glued together and must not be disassembled GR2013 GR1997 46BP-1 8 | GRAS 45CC Headphone Test Fixture Instruction Manual... -
Page 9: 45Cc-2 Prepolarized 1/2" Microphones
1/2" Microphone Holder 2 x GR2013 46BP 46BD p i n B a c k G u i d e *The parts are glued together and must not be disassembled GR2013 GR1997 46BP-1 Instruction Manual GRAS 45CC Headphone Test Fixture | 9... -
Page 10: 45Cc-3 60318-1 Ear Simulators And Externally Polarized 1/2" Microphones
45CC-3 60318-1 Ear Simulators and Externally Polarized 1/2” Microphones Included Items Headphone Test Fixture 45CC 45EA 60318-1 Ear Simulator 2 x RA0039 26AS GR0917 Allen Key, 4 mm YY0013 1 2 m m 1/2" Microphone Assembly* 2 x 69CC-1 GR0924... -
Page 11: 45Cc-4 60318-1 Ear Simulators And Prepolarized 1/2" Microphones
45CC-4 60318-1 Ear Simulators and Prepolarized 1/2” Microphones Included Items Headphone Test Fixture 45CC 60318-1 Ear Simulator 2 x RA0039 45EA Allen Key, 4 mm YY0013 1 2 m m 26AS R1440B GR0917 Microdot-BNC Cable 2 x AA0070 1/2" Microphone Assembly*... -
Page 12: 45Cc-5 Mouth Simulator And Externally Polarized 1/2" Microphones
45CC-5 Mouth Simulator and Externally Polarized 1/2” Microphones Included Items Headphone Test Fixture 45CC Mouth Simulator according to ITU-T Rec. 44AA P51 with built-in power amplifier Allen Key, 4 mm YY0013 1 2 m m 45EA 5 mm socket screw driver... -
Page 13: 45Cc-6 Mouth Simulator And Prepolarized 1/2" Microphones
GR1153 B a c k GR0010 G u i d e 1/2" Microphone Holder GR2013 46BP 46BD *The parts are glued together and must not be disassembled GR2013 GR1997 46BP-1 Instruction Manual GRAS 45CC Headphone Test Fixture | 1 3... -
Page 14: 45Cc-7 Mouth Simulator, 60318-1 Ear Simulators And Ext. Pol. 1/2" Microphones
45CC-7 Mouth Simulator, 60318-1 Ear Simulators and Ext. Pol. 1/2” Microphones Included Items Headphone Test Fixture 45CC Mouth Simulator according to ITU-T Rec. 44AA P51 with built-in power amplifier 60318-1 Ear Simulator 2 x RA0039 45EA 1 2 m m... -
Page 15: 45Cc-8 Mouth Simulator, 60318-1 Ear Simulators, Prepolarized 1/2"Microphones
45CC-8 Mouth Simulator, 60318-1 Ear Simulators, Prepolarized 1/2”Microphones Included Items Headphone Test Fixture 45CC Mouth Simulator according to ITU-T Rec. 44AA P51 with built-in power amplifier 60318-1 Ear Simulator 2 x RA0039 1 2 m m Allen Key, 4 mm... -
Page 16: 45Cc-9 Externally Polarized 1/4" Microphones
F r o n t 1/4" Microphone Holder GR2039 p i n B a c k G u i d e *The parts are glued together and must not be disassembled 1 6 | GRAS 45CC Headphone Test Fixture Instruction Manual... -
Page 17: 45Cc-10 Prepolarized 1/4" Microphones
1/4” CCP Standard Preamplifier Very Short 26CS p i n 1/4" Microphone Holder GR2039 B a c k G u i d e *The parts are glued together and must not be disassembled Instruction Manual GRAS 45CC Headphone Test Fixture | 1 7... -
Page 18: 45Cc-11 Mouth Simulator And Externally Polarized 1/4" Microphones
45CC-11 Mouth Simulator and Externally Polarized 1/4” Microphones Included Items Headphone Test Fixture 45CC Mouth Simulator according to ITU-T Rec. 44AA P51 with built-in power amplifier Allen Key, 4 mm YY0013 1 2 m m 5 mm socket screwdriver YY0034... -
Page 19: 45Cc-12 Mouth Simulator And Prepolarized 1/4" Microphones
B a c k G u i d e 1/4” CCP Standard Preamplifier Very Short 26CS 1/4" Microphone Holder GR2039 *The parts are glued together and must not be disassembled Instruction Manual GRAS 45CC Headphone Test Fixture | 1 9... -
Page 20: General Description
General Description This section describes how the 45CC is designed. Instructions on how to assemble and make ad- justments are given in the section “Assembly and Adjustments” on page 25 onwards. Front View Fig. 1 shows the main height and width adjustments possible with the 45CC. The Headband Holder has 4 fixed positions on the vertical Neck superimposed on a continuous adjustment of 20 mm for any position within 60 mm from bottom to top position. -
Page 21: Side View
Side View Below is shown a side view of the 45CC configured with a 44AA Mouth Simulator is shown. The Headband Holder can be adjusted relative to the Ear Plates both horizontally and vertically. Hori- zontally it can be fixed in three positions, the adjustment range is 10 mm. This makes it possible to test headphones with narrow, mid-sized or wide headbands. -
Page 22: Rear View
Positioning Guide 4 mm Allen 1 2 m m Fig. 3. Rear view of the 45CC with the screws for adjustment of width between ear plates and vertical ad- justment of the headband holder. F r o n t... -
Page 23: Ear Plate Assemblies
Ear Simulator or the Flanges for 1/2” or 1/4” microphones. These have the same outer dimensions and are mounted the same way, with three screws and fasteners. There- fore, it is fairly easy to reconfigure a 45CC, for example from a version with 1/2” microphones to IEC 60318-1 ear simulators. -
Page 24: The Microphone Holder
The microphone and preamplifier are already assembled in the microphone holder that is used for mounting in the 45CC. They are calibrated as a whole, and each assembly has its serial number engraved on the rear face of the holder. (The engraving is not shown below). -
Page 25: Assembly And Adjustments
Slide in the Ear Plate Assemblies with the headphone Positioning Guides facing downwards. 3. Tighten the four screws on the back of the unit. F r o n t Instruction Manual GRAS 45CC Headphone Test Fixture | 2 5 B a c k... -
Page 26: Mounting The Mouth Simulator
Fig. 8. Mounting the mouth simulator. 1. Place the 45CC in a way that lets you access the Base plate (“foot”) from the underside. 2. Guide the three Nuts through the three holes in the base plate. -
Page 27: Adjusting The Headband Holder Height
Position 3: + 10 mm. Both spacers are used between headband holder and neck. Instruction Manual GRAS 45CC Headphone Test Fixture | 2 7 F r o n t B a c k... -
Page 28: Adjusting The Positioning Guides
The scales on the two rods do not indicate the distance to the DUT. They are meant as a means to make it easy to document and repeat the settings onto more 45CC Headphone Test Fixtures. F r o n t... -
Page 29: Calibration
You can calibrate using a pistonphone, a sound calibrator or an electrostatic actuator. See the manual(s) for your calibration equipment for further information. For level calibration with a pistonphone or sound calibrator, 1/2” and 1/4” calibration adapters are required as described on page 28. Instruction Manual GRAS 45CC Headphone Test Fixture | 2 9... - Page 30 • For 1/4” microphones, the RA0331 1/4” Calibration Adapter must be used. It is part of the 45CC-configurations that use 1/4” microphones. For further information, see the manual for your calibrator. 3 0 | GRAS 45CC Headphone Test Fixture Instruction Manual...
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Page 31: Technical Specifications
Max = 135 mm Continuous adjustment of distance and angle Min = 130 mm D = 128 mm Max = 170 mm Fig. 14. 45CC’s key adjustments for different headphone sizes 3 1 | GRAS 45CC Headphone Test Fixture Instruction Manual... -
Page 32: Warranty, Service And Repair
2002/96/EC RoHS directive: 2002/95/EC GRAS Sound & Vibration continually strives to improve the quality of our products for our custom- ers; therefore, the specifications and accessories are subject to change. 3 2 | GRAS 45CC Headphone Test Fixture Instruction Manual...
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