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Service Manual
Radiotelephones MR 11
Product survey
Technical description, external connections
Circuit diagrams
Spare parts
Assembly and conversion instructions
Service accessories
Programming with WinIPP
© All rights reserved by Motorola GmbH • Geschäftsbereich Funksysteme, also for patent and
trade mark applications. Rights of disposal, e.g. copyright and right of transfer to third parties, are
likewise held by us.
Motorola GmbH • Geschäftsbereich Funksysteme
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Table of Contents
Related Manuals for Motorola MR 11
Summary of Contents for Motorola MR 11
- Page 1 Assembly and conversion instructions Service accessories Programming with WinIPP © All rights reserved by Motorola GmbH • Geschäftsbereich Funksysteme, also for patent and trade mark applications. Rights of disposal, e.g. copyright and right of transfer to third parties, are likewise held by us.
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Page 2: Table Of Contents
.. - 1 << >> MR 11 Technical Description MR 11 and Description of the External Connections Table of Contents General Information 2 - 2 Technical Data 2 - 2 Circuit Description 2 - 3 3.1 Receiver 2 - 3 3.2 Transmitter... -
Page 3: General Information
The radios are designed both for private mobile radio and trunking systems. The MR 11 is the mobile radio in this new radio family. There are two models: the C radios with an integrated control unit for voice transmission and the R radios (without control unit) with connection facility for external data equipment and control units for voice transmission. -
Page 4: Circuit Description
The second band pass filter could be omitted from the MR radio on account of the good selection of the harmonic filter. Double Balanced Mixer In the double balanced mixer, the reception signal is mixed down to the 1st IF level by the applied oscillator signal. Motorola GmbH • Geschäftsbereich Funksysteme 2 - 3... -
Page 5: Transmitter
25 W 25 W The transmitter power of the MR 11 is keyed up with the aid of a D/A converter in the form of a staircase function in two milliseconds. The setting values are passed to the transmitter via the control line VPWRREF after a linear interpolation. -
Page 6: Frequency Conditioning
In the meantime, the loop attenuation is adapted by the resistors R381, 382, 384 in conjunction with the switches V364, 365 in two steps (same triggering but time constants now by C367, R377, R385). Motorola GmbH • Geschäftsbereich Funksysteme 2 - 5... -
Page 7: Analog Signal Processing
A new kind of AGC amplifier is used which enables good communication even in noisy environments (DNC, Dynamic Noise Compensation). The external inputs (MIC100) of the radios are unstabilised and only obtain their DNC function from a connected Motorola hand control unit. AF Output Amplifier The AF output amplifier for the external loudspeaker and the hand control unit is a monolithic IC TDA 1020 (N403). -
Page 8: Signalling Module Mdsr 134
Digital Signalling (Function Scope of the OKI modem) A bit-transparent modem is used for RX decoding of the 1200 baud signalling. A software control effects an automatic changeover from MDSR 134 to the OKI modem. Motorola GmbH • Geschäftsbereich Funksysteme 2 - 7... -
Page 9: Spare Parts
Basic unit MR 1142 .. C .., MR 1142 .. R .., MR 1145 .. C .., MR 1145 .. R .. 3 - 11 Basic unit MR 11 .. C .. 3 - 20 Control unit ML 11 3 - 22... - Page 10 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Refer to note on page 3 - 1 Index 9 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 2...
- Page 11 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Index 9 Refer to note on page 3 - 1 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 3...
- Page 12 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Refer to note on page 3 - 1 Index 9 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 4...
- Page 13 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Refer to note on page 3 - 1 Index 9 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 5...
- Page 14 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Refer to note on page 3 - 1 Index 9 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 6...
- Page 15 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Refer to note on page 3 - 1 Index 9 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 7...
- Page 16 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Refer to note on page 3 - 1 Index 9 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 8...
- Page 17 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Refer to note on page 3 - 1 Index 9 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 9...
- Page 18 << >> .. - 1 MR 11 MR 1116 .. C .. MR 1116 .. R .. Basic unit Refer to note on page 3 - 1 Index 9 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 10...
- Page 19 MR 1142 .. C .. MR 1142 .. R .. MR 1145 .. C .. MR 1145 .. R .. Basic unit Refer to note on page 3 - 1 Index 5 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 11...
- Page 20 MR 1142 .. C .. MR 1142 .. R .. MR 1145 .. C .. MR 1145 .. R .. Basic unit Refer to note on page 3 - 1 Index 5 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 12...
- Page 21 MR 1142 .. C .. MR 1142 .. R .. MR 1145 .. C .. MR 1145 .. R .. Basic unit Refer to note on page 3 - 1 Index 5 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 13...
- Page 22 MR 1142 .. C .. MR 1142 .. R .. MR 1145 .. C .. MR 1145 .. R .. Basic unit Refer to note on page 3 - 1 Index 5 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 14...
- Page 23 MR 1142 .. C .. MR 1142 .. R .. MR 1145 .. C .. MR 1145 .. R .. Basic unit Refer to note on page 3 - 1 Index 5 Motorola GmbH • Geschäftsbereich Funksysteme 3 - 15...