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PAMS Technical Documentation

Issue 1 12/99

 Nokia Mobile Phones Ltd.

Loopset LPS-3

Summary of content (14 pages)

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PAMS Technical Documentation Loopset LPS-3 Issue 1 12/99 Nokia Mobile Phones Ltd.
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Loopset LPS-3 PAMS Technical Documentation AMENDMENT RECORD SHEET Amendment Date Number 12/99 Page 2 Inserted By Comments OJuntune Nokia Mobile Phones Ltd.
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PAMS Technical Documentation Loopset LPS-3 CONTENTS Page No Loopset LPS-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Basic Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . List of Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . .
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Loopset LPS-3 PAMS Technical Documentation Loopset LPS-3 Introduction Hearing impaired people, who use hearing aids (HA), have problems in using cellular phones. They can’t identify speech, partly due to poor S/N–ratio and partly because of interference. Most HA have poor protection for interferences. By using the Loopset the interference problems are minimized. LPS–3 is designed for DCT3.5, DCT3.75 and DCT 4 series phones. 4–wire interface is implemented with 2.
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Loopset LPS-3 PAMS Technical Documentation Basic Specification Unit LPS–3 Max. dimensions (mm) (W x H x D) Notes 37mm x 40mm x 17mm Weight 60g List of Modules Name of module Type name Material code LPS–3 Product LPS–3 0630244 LPS–3 Module JL3 0201489 Assembly parts MLPS3 0262071 Issue 1 12/99 Nokia Mobile Phones Ltd.
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Loopset LPS-3 PAMS Technical Documentation Recommended batteries: Type Size / IEC–type Min Vout Max Vout Rated capacity Talk time. Duration of the battery continuing 3mA on load Standby of dormancy. Battery continuing 20uA on load Zinc Air Hearing Aid Battery 675 / PR44 1.15 1,40 540 mAh 180 hour. 840 hour or 35 day (1) Silver Oxide Hearing Aid Battery 675 / SR44 1.25 1,55 150 mAh 50 hour. 7 500 hour or 310 day. Alkaline Battery 675 / LR44 1.25 1,45 110 mAh 36 hour.
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Loopset LPS-3 PAMS Technical Documentation When there is no call going, AUXOUT is in high impedance state and XMIC is pulled up. When loopset is connected, XMIC is pulled down. XMIC is connected to HeadsetInt line (in MAD), so an interrupt is given due to both connection and disconnection. During a call there is bias voltage (1.5 V) in AUXOUT. The state of HeadsetInt can’t be sure.
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Loopset LPS-3 PAMS Technical Documentation Magnetic Field frequency response window dBr +10 +5 +3 dB +3 dB +3 dB –3 dB –3 dB +3 dB 0 –5 –3 dB –3 dB –10 –15 –18 dB –20 300 Hz 3 kHz 250 500 1k 2k 4k Functional Blocks Table 1.
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Loopset LPS-3 PAMS Technical Documentation Microphone response window dBr +10 +5 +3 dB +3 dB +3 dB –3 dB –3 dB –3 dB +3 dB 0 –5 –5 dB –3 dB –10 –15 –20 300 Hz 250 Issue 1 12/99 3 kHz 500 1k Nokia Mobile Phones Ltd.
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Loopset LPS-3 PAMS Technical Documentation External Signals and Connections MicP XMicP 100k 47R MicN 100k XMic N COMP1 COMP2 Vbattery Shutdown Mic COMP3 + – GND VREF HF Low signal + COMP4 RCOSC 10k XEarP Vtoneout 330R HFCM COMP4 Peep LoopP LoopN XEarN = from Mobile = Internal LOOPSET signals Page 10 Nokia Mobile Phones Ltd.
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Loopset LPS-3 PAMS Technical Documentation Plug and X100 connector signals Plug / Jack 1 Pin in x100 1 Name Function Min Typ Ma x 1.6 XMicP Loopset microphone inin put (from accessory to phone) Unit Description kW Loopset source AC impedance ref 1kHz 400 mA Bias current 200 mV- Maximum signal level p–p Loopset detection (from accessory to phone) Ead / hookint mbus Ead / Hookint mbus 3 2 2 3 XMicN XEarN Ext accessory detection Bias OFF Button closed DCT3.n Mic bias ON DCT4 2,4 2.
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Loopset LPS-3 PAMS Technical Documentation Exploded View of LPS-3 Assembly parts of LPS-3 ITEM 1 2 3 4 5 6 7 8 Q’TY 2 CODE DESCRIPTION VALUE, TYPE 0201489 9780260 9451692 9451691 6290021 9451693 9451694 9380750 Module Loop set Cable LPS–3 B–cover A–cover PT-screw Battery lid Button Type label lps-3 DMJ00180 DMD05510 DMD05509 1,8x8 feznTX6 DMD05507 DMD05511 Note: The torque of the screws is 0.35 Nm. Page 12 Nokia Mobile Phones Ltd.
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Loopset LPS-3 PAMS Technical Documentation Parts List of LPS-3 ITEM (Version 6.1) CODE DESCRIPTION R001 1430784 R003 1430796 R004 1430778 R005 1430804 R006 1430792 R018 1430778 R020 1430796 R021 1430804 R024 1430792 R025 1430796 R026 1430122 R027 1430790 R028 1430804 R031 1430778 R032 1430804 R033 1430780 R034 1430784 R035 1430788 R036 1430778 R037 1430778 R039 1430804 R041 1430804 R042 1430812 R043 1430804 R044 1430778 R046 1430762 R047 1430804 R048 1430812 C002 2610003 3.2x1.6x1.6 C005 2610003 3.2x1.
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Loopset LPS-3 C025 C026 C027 C029 C030 C031 C033 C034 C035 C038 C039 C040 C041 C053 C221 C261 C262 B001 Z001 Z002 T001 V400 V401 V405 V406 N003 N402 X100 X200 Page 14 2320546 2320779 2320779 2320107 2320107 2320779 2320546 2320779 2320592 2320564 2320469 2320469 2320779 2320584 2320779 2320546 2320546 5140117 3640035 3640035 3640073 4219922 4219922 4219904 4219908 4340379 4340331 5409067 5400125 6400039 9854251 PAMS Technical Documentation Ceramic cap. 27 p Ceramic cap. 100 n Ceramic cap.