G.R.A.S. 45CC Instruction Manual Download Page 13

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45CC-6 Mouth Simulator and Prepolarized 1/2” Microphones

Included Items

Headphone Test Fixture

45CC

Mouth Simulator according to ITU-T Rec.
P51 with built-in power amplifier

44AA

12mm

Back

Front

Guide

-10

-1

Allen Key, 4 mm

YY0013

5 mm socket screw driver

YY0034

icroDot Stik

LEMO to LEMO

BNC to BNC

wer Supply

icroDot Stik

LEMO to LEMO

BNC to BNC

wer Supply

Microdot-BNC Cable

2 x AA0070

icroDot Stik

LEMO to LEMO

BNC to BNC

wer Supply

BNC-BNC Cable, 3 m

AA0035

1/2" Microphone Assembly*

2 x 69CC-2

The 69CC-2 Microphone Assembly

GR0917

GR0924

GR1440B

RA0045

26AS

45EA

46BP

RA0241

40AG

GS0158

GR0010

46BD

B-2

B-1

GR1153

46BP-1

1/2" Prepolarized Microphone

40AO

1/2” CCP Standard Preamplifier with Mi-
crodot Connector, Very Short

26CK

GR2013

GR1997

1/2" Microphone Holder

GR2013

*The parts are glued together and must not be disassembled

Instruction Manual

GRAS 45CC Headphone Test Fixture | 1 3

Summary of Contents for 45CC

Page 1: ...Instruction Manual GRAS 45CC Headphone Test Fixture 45CC 1 to 45CC 12 LI0194 6 February 2018 ...

Page 2: ... 18 GRAS Sound Vibration A S www gras dk Any technical documentation that is made available by GRAS is the copyrighted work of GRAS and is owned by GRAS The content in this document is subject to change without notice GRAS Sound Vibration A S is not liable or responsible for any errors or inaccuracies that may appear in this document Trademarks Any other product names mentioned in this document ma...

Page 3: ...ators Prepolarized 1 2 Microphones 15 45CC 9 Externally Polarized 1 4 Microphones 16 45CC 10 Prepolarized 1 4 Microphones 17 45CC 11 Mouth Simulator and Externally Polarized 1 4 Microphones 18 45CC 12 Mouth Simulator and Prepolarized 1 4 Microphones 19 General Description 20 Front View 20 Side View 21 Rear View 22 Ear Plate Assemblies 23 The Fittings for Microphone Mounting 23 The Microphone Holde...

Page 4: ...e the ear plate assembly s Rods into the Slots on the 45CC 2 When they are located at the desired position secure them with the screws on the back For further information see 45CC 9 Externally Polarized 1 4 Microphones on page 16 and Assembling the 45CC on page 25 Ear Plate Assembly Rod Slot 12mm Back Front 4 mm Allen Key Fig 1 Mounting the ear plate assemblies in the 45CC Instruction Manual 4 GRA...

Page 5: ...and holder ear plates and the unique positioning system ensures that when testing identical headphones you will get the same positioning and fit from one test to the next About This Manual This manual consists of the following main sections The 45CC Configurations details the 8 pre configurations that GRAS has made available The contents of these configurations are listed in detail in the followin...

Page 6: ...rom the fac tory 45CC Configured with Mouth Simulator and 1 2 Microphones 45CC 5 with Mouth Simulator and Ext Polarized 1 2 Microphones 45CC 6 with Mouth Simulator and Prepolarized 1 2 Microphones 45CC configured with 1 2 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 Except for the ...

Page 7: ...the factory 45CC Configured with Mouth Simulator and 1 4 Microphones 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 Except for the mou...

Page 8: ... 0 5 5 A 0 1 5 1 5 0 1 5 1 5 Allen Key 4 mm YY0013 1 2 Microphone Assembliy 2 x 69CC 1 The 69CC 1 Microphone Assembly GR0917 GR0924 26AS 45EA 46BP RA0241 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 B 1 0 20 10 0 10 20 J GR1153 46BP 1 1 2 Externally Polarized Microphone 2 x 40AG 1 4 Preamplifier with 3 m integrated cable 2 x 26AC 1 2 to 1 4 Adapter 2 x GR0010 GR2013 GR1997 1 2 Microphone Holder 2 x GR2...

Page 9: ... Cable 2 x AA0070 1 2 Microphone Assembly 2 x 69CC 2 The 69CC 2 Microphone Assembly GR0917 GR0924 R1440B A0045 26AS 45EA 46BP RA0241 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 B 1 0 20 10 0 10 20 J GR1153 46BP 1 1 2 Prepolarized Microphone 2 x 40AO 1 2 CCP Standard Preamplifier with Mi crodot Connector Very Short 2 x 26CK GR2013 GR1997 1 2 Microphone Holder 2 x GR2013 The parts are glued together and...

Page 10: ...ophone Assembly 2 x 69CC 1 The 69CC 1 Microphone Assembly GR0917 GR0924 26AS 45EA 46BP RA0241 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 B 1 0 20 10 0 10 20 J GR1153 46BP 1 1 2 Externally Polarized Microphone 40AG 1 4 Preamplifier with 3 m integrated cable 26AC 1 2 to 1 4 Adapter GR0010 GR2013 GR1997 1 2 Microphone Holder GR2013 The parts are glued together and must not be disassembled Instruction Ma...

Page 11: ...NC to BNC Power Supply Microdot BNC Cable 2 x AA0070 1 2 Microphone Assembly 2 x 69CC 2 The 69CC 2 Microphone Assembly GR0917 GR0924 R1440B A0045 26AS 45EA 46BP RA0241 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 B 1 0 20 10 0 10 20 J GR1153 46BP 1 1 2 Prepolarized Microphone 40AO 1 2 CCP Standard Preamplifier with Mi crodot Connector Very Short 26CK GR2013 GR1997 1 2 Microphone Holder GR2013 The parts...

Page 12: ...Stik LEMO to LEMO BNC to BNC Power Supply BNC BNC Cable AA0035 1 2 Microphone Assembly 2 x 69CC 1 The 69CC 1 Microphone Assembly GR0917 GR0924 26AS 45EA 46BP RA0241 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 B 1 0 20 10 0 10 20 J GR1153 46BP 1 1 2 Externally Polarized Microphone 40AG 1 4 Preamplifier with 3 m integrated cable 26AC 1 2 to 1 4 Adapter GR0010 GR2013 GR1997 1 2 Microphone Holder GR2013 T...

Page 13: ...to BNC Power Supply Microdot BNC Cable 2 x AA0070 MicroDot Stik LEMO to LEMO BNC to BNC Power Supply BNC BNC Cable 3 m AA0035 1 2 Microphone Assembly 2 x 69CC 2 The 69CC 2 Microphone Assembly GR0917 GR0924 R1440B A0045 26AS 45EA 46BP RA0241 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 B 1 0 20 10 0 10 20 J GR1153 46BP 1 1 2 Prepolarized Microphone 40AO 1 2 CCP Standard Preamplifier with Mi crodot Conne...

Page 14: ...iver YY0034 MicroDot Stik LEMO to LEMO BNC to BNC Power Supply BNC BNC Cable AA0035 1 2 Microphone Assembly 2 x 69CC 1 The 69CC 1 Microphone Assembly GR0917 GR0924 26AS 45EA 46BP RA0241 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 B 1 0 20 10 0 10 20 J GR1153 46BP 1 1 2 Externally Polarized Microphone 40AG 1 4 Preamplifier with 3 m integrated cable 26AC 1 2 to 1 4 Adapter GR0010 GR2013 GR1997 1 2 Micro...

Page 15: ...roDot Stik LEMO to LEMO BNC to BNC Power Supply Microdot BNC Cable 2 x AA0070 MicroDot Stik LEMO to LEMO BNC to BNC Power Supply BNC BNC Cable AA0035 1 2 Microphone Assembly 69CC 2 The 69CC 2 Microphone Assembly GR0917 GR0924 R1440B A0045 26AS 45EA 46BP RA0241 40AG GS0158 GR0010 46BD 1 2 4 3 5 L B 2 B 1 0 20 10 0 10 20 J GR1153 46BP 1 1 2 Prepolarized Microphone 40AO 1 2 CCP Standard Preamplifier ...

Page 16: ... Allen Key 4 mm YY0013 1 4 Calibration Adapter RA0331 1 4 Microphone Assembly 2 x 69CC 3 The 69CC 3 Microphone Assembly 1 4 Externally polarized Microphone 40BP 1 4 Preamplifier with 3 m integrated Cable 26AC 1 4 Microphone Holder GR2039 The parts are glued together and must not be disassembled Instruction Manual 16 GRAS 45CC Headphone Test Fixture ...

Page 17: ...r Supply MicroDot Stik LEMO to LEMO BNC to BNC Power Supply Microdot BNC Cable 2 x AA0070 1 4 Calibration Adapter RA0331 1 4 Microphone Assembly 2 x 69CC 4 The 69CC 4 Microphone Assembly 1 4 Prepolarized Microphone 40BD 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 Fix...

Page 18: ...llen Key 4 mm YY0013 5 mm socket screwdriver YY0034 MicroDot Stik LEMO to LEMO BNC to BNC Power Supply BNC BNC Cable AA0035 1 4 Calibration Adapter RA0331 1 4 Microphone Assembly 2 x 69CC 3 The 69CC 3 Microphone Assembly 1 4 Externally polarized Microphone 40BP 1 4 Preamplifier with 3 m integrated Cable 26AC 1 2 Microphone Holder GR2039 The parts are glued together and must not be disassembled Ins...

Page 19: ... LEMO to LEMO BNC to BNC Power Supply MicroDot Stik LEMO to LEMO BNC to BNC Power Supply Microdot BNC Cable 2 x AA0070 MicroDot Stik LEMO to LEMO BNC to BNC Power Supply BNC BNC Cable AA0035 1 4 Calibration Adapter RA0331 1 4 Microphone Assembly 2 x 69CC 4 The 69CC 4 Microphone Assembly 1 4 Prepolarized Microphone 40BD 1 4 CCP Standard Preamplifier Very Short 26CS 1 4 Microphone Holder GR2039 The ...

Page 20: ... 20 mm for any position within 60 mm from bottom to top position The top position is 135 mm over the center of the Ear Plates the lowest position is 60 mm below the top position The distance between the Ear Plates can be adjusted from 130 to 170 mm in compliance with ANSI S12 42 and IEC 60318 7 12mm Front 4 mm Allen Key 20 10 0 150 130 170 150 170 130 Continuous height adjustment 20 mm Fixed heigh...

Page 21: ...ent is 60 mm from top to bottom See page 27 for instruction on how to make these adjustments The Positioning Guide is described in detail on page 24 How you can adjust it for different headphone sizes is shown on page 28 A B C D 10 20 30 40 50 10 20 30 40 50 Horizontal position relative to the ear plate 0 5 and 10 mm Vertical adjustment Min 75 mm Max 135 mm Headband Holder Neck Positioning Guide 4...

Page 22: ...n page 28 for instructions on how to adjust the Positioning Guides to fit dif ferent sizes of headphones Ear Plate Assembly 4 screws for securing the Ear Plate Assemblies adjusting the width Screw for continuous vertical adjustment of the headband holder height Positioning Guide 2 screws for adjustment of the Positioning Guide Headband Holder 12mm Back Front 4 mm Allen Key Fig 3 Rear view of the 4...

Page 23: ...imensions 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 The GR1997 Holder is used with the RA0039 Ear Simulator only as the thread it provides is an integral part of the two flanges 12mm Front 4 mm Allen Key Ear Plate GR1997 Holder GR2013 Microphone holder...

Page 24: ...R2039 Engraved serial number Fig 5 1 2 and 1 4 microphone mounted in microphone holder Do not disassemble as shown in a The Positioning Guide The Positioning Guide can accommodate headphones of much different sizes Engraved Scales on the Ear Plates make it easy to center the headphone over the microphone scales on the Posi tioning Guide Rods help set up and reproduce distance and angle for the Pos...

Page 25: ...uring the ear plate assemblies Ear Plate Assembly Positioning Guide Rod with Groove for width indication Slots for the Rods Scale for width indication Fig 7 Mounting the ear plate assemblies in the text fixture If necessary loosen the four screws on the back of the fixture These are shown Fig 3 on page 22 The distance between the ear plates can be adjusted from 130 to 170 mm Two mm Scales on the f...

Page 26: ... screws for securing the mouth simulator assembly to the base plate Nuts for attaching the mouth simulator 44AA Mouth Simulator Base plate 5 mm socket screwdriver 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 3 Fasten the nuts using the YY0034 socket screwdriv...

Page 27: ...djusting the Horizontal Position The head band holder s horizontal position can be adjusted by 0 5 mm or 10 mm relative to the neck the center of the ear plate This is done by changing the position of two 5 mm spacers as illustrated below Position 1 0 mm Position 2 5 mm Position 3 10 mm Spacers Spacers Spacers Neck Neck Neck Headband Holder Headband Holder Headband Holder 12mm Back Front 4 mm Alle...

Page 28: ...0 10 20 30 40 50 10 20 30 40 50 1 2 3 Small headphone Large headphone 1 2 3 12mm Back Front 4 mm Allen Key Fig 11 Example of positioning of a headphone using the 45CC s positioning system 1 Position the headphone so it is centered over the microphone 2 Push the upper part of the guide until it touches the headphone without dislocating it as shown in 2 and secure the position by fastening the screw...

Page 29: ... When removed from the assembly b it is ready for calibration Important The parts of the microphone assembly microphone microphone holder 1 2 to 1 4 adapter and preamplifier are glued together and should under no circumstances be disassembled If a need for this arises you must send it to GRAS for service You can calibrate using a pistonphone a sound calibrator or an electrostatic actuator See the ...

Page 30: ...ature Series The adapters have identical outer dimen sions and the procedure for mounting them is the same 1 Select the appropriate adapter for the microphone you want to calibrate 2 Remove the pistonphone collar by turning it counterclockwise and lifting it up 3 Remove the O ring mounted in the piston phone coupler entrance 4 Push the adapter as far down into the pis tonphone as it will go You ar...

Page 31: ... 1 69CC 2 69CC 3 69CC 4 25 dB A 164 dB ext polarized 3 15 Hz 20 kHz 25 dB A 150 dB prepolarized 3 15 Hz 20 kHz 39 dB A 169 dB ext polarized 4 Hz 70 kHz 44 dB A 166 dB prepolarized 4 Hz 70 kHz Sound source GRAS 44AA Mouth Simulator According to ITU T P51 Placed in accordance with ITU T P58 Cross feed damping 28 dB 20 500 Hz 45 dB 500 20 kHz Weight without microphones or mouth simulator 3 kg 20 10 0...

Page 32: ...rials and workmanship The warranty does not cover products that are damaged due to negligent use an incorrect power supply or an incorrect connection to the equipment Service and Repairs All repairs are made at GRAS International Service Center located in Denmark Our Service Center is equipped with the newest test equipment and staffed with dedicated and highly skilled engi neers Upon request we m...

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