Maxon SD-171E Manuale utente

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SD-171E / SD-174E

Data Radio

Service Manual

Service Manual SD170E Series

Page 2 of 44

Amendment Record Sheet

All amendments to this manual should be incorporated as soon as they are received and

recorded below:

Issue No.

Effective

Date

Reason for Change

Date

Signature

All Engineering Bulletins relevant to this product should be placed at the rear of this binder.

Please ensure that this manual is updated with any replacement pages, which may accompany

these Engineering Bulletins.

Always read all Engineering Bulletins before carrying out work on a radio.

Please read the WARNINGS on the next page before referring to subsequent sections.

Service Manual SD170E Series

Page 3 of 44

Warnings

1. NEVER connect the transceiver to a power source of more than 13.8V.

2. NEVER dispose of the battery in fire –it can explode causing personal injury.

3. NEVER attempt to disassemble the battery or remove its case material or charging

contacts. Do not short the battery terminals.

4. NEVER expose the transceiver to rain, snow or any liquids.

5. NEVER modify a radio or accessory except as instructed in the service manual,

engineering bulletins or formal communication as this may invalidate any warranty,

guarantee or type approval.

6. DO NOT use or place the transceiver in areas with temperatures below -30°C or above

+60°C, In areas subject to direct sunlight, such as the dashboard.

7. DO NOT hold the radio in such a manner that the antenna is next to, or touching,

exposed parts of the body, especially the face or eyes, while transmitting.

8. DO NOT allow children to operate transmitter-equipped radio equipment.

9. DO NOT operate the radio near unshielded electrical blasting caps or in an explosive

atmosphere, unless it is a type especially designed and qualified for such use.

10. NEVER modify this device or its accessories, except as instructed in the Service Manual,

Engineering Bulletins or formal communication as this may invalidate any warranty,

guarantee or type approval.

11. AVOID placing the transceiver in excessively dusty environments.

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Service Manual SD170E Series

Page 4 of 44

Contents

Amendment Record Sheet............................................................................................................2

Warnings .....................................................................................................................................3

Contents ......................................................................................................................................4

Introduction.................................................................................................................................5

Pre-Install check, Accessories & Options ......................................................................................6

Pre-Installation...........................................................................Error! Bookmark not defined.

Accessories ...............................................................................Error! Bookmark not defined.

Options....................................................................................................................................6

Product Introduction ....................................................................................................................7

Installation...................................................................................................................................8

Installation ...............................................................................................................................8

External Connections...............................................................................................................8

General Specification....................................................................................................................9

Transmitter Specification............................................................................................................10

Receiver Specification ................................................................................................................11

Reference Crystal.......................................................................................................................12

Enviromental..............................................................................................................................12

Dimensions ................................................................................................................................12

Features ....................................................................................................................................13

Access to digital and RF boards..................................................................................................16

Alignment ..................................................................................................................................19

Alignment points........................................................................................................................23

Flow Diagrams ...........................................................................................................................24

CTCSS .......................................................................................................................................27

Modem Options..........................................................................................................................28

Interfacing.................................................................................................................................29

External connections..............................................................................................................29

DB-15 PIN descriptions with input/output level........................................................................29

Channel Selection ......................................................................................................................31

SD174E Layouts Control Board...................................................................................................34

SD174E Layouts RF Board..........................................................................................................39

Service Manual SD170E Series

Page 5 of 44

Introduction

This Maxon Product Manual is a comprehensive guide to the maintenance and field repair of this

equipment. It covers all versions of the SD170E Series data radio(s). Before using this manual

please read the whole of this introductory chapter, this will help you to make the best use of it. If

you have not done so already, please also read the warnings immediately in front of this chapter

before proceeding any further.

Using this Manual

The organization of this manual has been arranged to enable the location and referencing of

information, as quickly as possible.

Section 3 - Installation, Commissioning & Alignment. Describes connections to the radio, how to

commission it and how to align the radio should this becomes necessary.

Section 4 - Detailed functional description.

Section 5 - Troubleshooting.

Service Manual SD170E Series

Page 6 of 44

Pre-Install check, Accessories & Options

Programmer

ACC-916E SD-170E Series Programming software allows frequencies and

features to be changed.

ACC-2016E USB programming cable

Service

ACC-516 Extender PCB Allows RF PCB to be spaced off of the Digital

PCB to facilitate Alignment procedures.

Options

The option boards that can be fitted are:

ACC-513E GMSK modem (up to 9600 baud rate on 25 kHz channel spacing)

ACC-514E FFSK modem (up to 4800 baud rate on 25 kHz channel spacing)

The frequency versions of radio that are available are:

V2 142-174 MHz

U2 450-490 MHz.

12.5 kHz or 25 kHz versions of all bands.

Service Manual SD170E Series

Page 7 of 44

Product Introduction

The SD-170E Series (here in after called “the radios”) of RF wireless modems from MAXONCIC

utilize the latest technology in its design and manufacturing. Both the UHF and VHF models are

Phase Lock Loop Synthesizer (PLL) / microprocessor controlled and offer five watts of power with

16-channel capability. Multiple functions including 1200 to 9600 baud rates, AC and/or DC audio

coupling, GMSK, FFSK and FSK modulation are standard in these fully programmable wide

bandwidth RF wireless modem units. Programmable sub-audio squelch system (CTCSS & DCS)

and two-tone squelch system are newly added to the signal level detect squelch system (RSSI)

through PC Program. GPS Data handling is provided to interface and control internal GPS

receiver.

The radios are programmed using ACC-916E programming software, an Intel Pentium2 or higher

Personal Computer. Operating system is Microsoft windows 98, ME, 2000, and XP and Vista

based software. This allows the radio to be tailored to meet the requirements of the individual user

and of the System(s) it is operating within.

Antenna / RF connector

GPS antenna (where fitted)

BNC type nominal 50impedance

SMA

Programmer ACC-916E

XP, Vista, ME, 2000 and Windows based

programmer allowing personalization of the SD-170E

Series Modems via the RS232 port.

Service Manual SD170E Series

Page 8 of 44

Installation

The SD-170E Series Radio Modems usually requires mounting in a suitable location.

Attention should be given to the heat sinking of the radio if prolonged transmission is

required, see Section 2, which also includes details of the mounting hole dimensions.

Note: Continuous transmission is not possible at high power (5W) without a suitable heat

sink.

The SD-170E Series Radio Modems can be used with helical or whip aerials or may be

connected to an external antenna, via a suitable connecting cable.

External Connections

Connection is made to the SD-170E Series Radio Modems via an external 50 ohm BNC

socket (RF signal) and a high density 15-way “D”-type socket (DB-15 connector; control

and data signals) with 4-40 UNC threaded jack posts for more permanent connection.

Besides, SCN-12 type circular connector is added to separate power line from data and

analogue signals of DB-15 connector.

DATA MOD IN 1

Data OUT (AF)

PTT IN

VIN(12V)

SERIAL OUT (PROG.)

BUSY

MIC IN (AF)

SERIAL IN/OUT PROG

SPK OUT

SERIAL DATA IN (OPT)

SERIAL DATA OUT (OPT)

SERIAL BUSY OUT (OPT)

GPS DATA IN (OPT)

DGPS DATA IN (OPT)

GPS DATA OUT (OPT)

DB-15 CONNECTOR

BODY GROUND

************IMPORTANT –PIN 14 is GROUND*************

Fig. 1 Pin-outs of DB-15 connector

Fig. 2 Front panel

Service Manual SD170E Series

Page 9 of 44

General Specification

VHF

UHF

Equipment Type

Data radio (Wireless Modem)

Model Series

SD-171E

SD-174E

Performance

Specifications

TIA/EIA-603 /ETS 300-113

Frequency Range

142-174MHz

450-490MHz

RF Output

1-5W

Channel Spacing

12.5KHz, 25KHz Programmable

Modulation Type

F3D, F3E

Intermediate

Frequency

45.1MHz & 455KHz

Number of Channels

Frequency Source

Synthesizer

Operation Rating

Intermittent

90 : 5 : 5 (Standby : RX : TX)

Power Supply

Ext. Power Supply (12 VDC Nominal)

Temperature Range

Storage

Operating

From -40°C to +80°C

From -30°C to +60°C

Current Consumption

Standby(Muted)

Transmit 5Watts RF

Power

Transmit 2Watts RF

Power

< 65mA

< 2.0 A

< 1.0 A

Lock Time

< 10ms

TX to RX attack time

< 20ms (No Power Saving)

RX to TX attack time

< 20ms

Dimensions

(118mm)W X (63mm)H X (35mm)D

Weight

266.5grams

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Service Manual SD170E Series

Page 10 of 44

Transmitter Specification

VHF

UHF

Model Series

SD-171E

SD-174E

Carrier Power (Nom. Max.

Min.)

Hi Power

Low Power

5W < 6W > 4.5W

1W<1.5W>0.8W

5W < 6W > 4.5W

1W<1.5W>0.8W

Sustained Transmission

Time : 5 10 30 Sec

(Nominal Conditions)

Power : >90% >85% >80%

Frequency Error

Nominal condition

Extreme condition

< 0.5 KHz ±2.5 ppm

< 0.75 KHz ±2.5 ppm

Frequency Deviation

25 KHz Channel Spacing

12.5 KHz Channel Spacing

Peak ±5.0, Min. ±3.8KHz

Peak ±2.5, Min. ±1.9KHz

Audio Frequency

Response

Within +1/-3dB of 6dB octave

@ 300 Hz to 2.55 kHz for 12.5 kHz C.S.

@ 300 Hz to 3.0 kHz for 25 kHz C.S.

Adjacent Channel Power

25 KHz Channel Spacing

12.5 KHz Channel Spacing

< 70 dBc @ Nominal Condition , < 65 dBc @ Extreme Condition

< 60 dBc @ Nominal Condition , < 55 dBc @ Extreme Condition

Conducted Spurious

Emission

< -36 dBm

Modulation Sensitivity

100mV RMS @ 60% Peak Dev.

Hum & Noise

25 KHz Channel Spacing

12.5 KHz Channel Spacing

> 40 dB (without PSOPH)

> 40 dB (with PSOPH)

Modulation Symmetry

< 10% Peak Dev @ 1KHz input for nominal dev. + 20dB

Load Stability

No osc at ≥ 10:1 VSWR all phase angles and suitable antenna

No destroy at ≥ 20:1 all phase angle

Peak Deviation Range

Adjustment

@ 1 KHz, Nom Dev + 20dB

25 KHz Channel Spacing

12.5 KHz Channel Spacing

Min. 3.5, Max. 6.0

Min. 1.5, Max. 4.0

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