Encom Wireless Data Solutions ENC900 User Manual

Operating Manual

Model: ENC-900 900 MHz Spread Spectrum OEM Transceiver

Revision 1.00, February 23, 2005

Encom Wireless Data Solutions Inc.

#7-640, 42nd Ave. N.E. Calgary, Alberta T2E 7J9 Phone: (403) 230-1122 Fax: (403) 276-9575

http://www.encomwireless.com/

RF EXPOSURE

This module has been designed to comply with FCC RF exposure requirements outlined in Parts 2.1091,

2.1093, and 15.247(b)(4). Deviation from the recommended installation may violate RF exposure requirements.

The manual for end users of the final product which incorporates the ENC-900 module must contain the following statement in a prominent location:

To comply with FCC RF exposure requirements for mobile transmitting devices, this transmitter should only be used or installed at locations where there is at least 20cm separation distance between the antenna and all persons.

FCC NOTIFICATIONS

The ENC-900 module generates radio frequency energy. It must be installed according to the manufacturer’s guidelines or it has the potential to cause interference with other radio devices. Testing has been performed to assure that it conforms with the FCC Part 15 rules for intentional and unintentional radiators.

No further EMI compliance testing of the transmitter is required as long as the 20 cm separation and colocation requirements are observed. Each new use of the module will, however, always need to be scanned for unintentional radiation from digital clocks, etc.

All necessary calibration has been performed at the time of manufacture. Any modification of the device after it leaves the factory is a violation of FCC rules.

Compliance Statement (Part 15.19)

This device complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference that may cause undesired operation.

Warning (Part 15.21)

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

RF Exposure (OET Bulletin 65)

LABELING REQUIREMENTS

The FCC requires that the Part 15 statement be installed on the outside of the final product in a manner which allows it to be seen and read. The accepted statement and a sample label format are as follows:

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference that may cause undesired operation.

Contains TX FCC ID: PLQENC900

Canada: 3966A-ENC900

S/N: XXXYYYZZZ

MODEL: ENC-900

Made in Canada

The label should be printed or molded into the case using a type front and size that is readable with the unaided eye. The FCC identification number is required.

Industry Canada Statement

The term “IC” before the certification / registration number only signifies that the Industry Canada technical specifications were met.

900 MHz

Spread-Spectrum OEM Radio Modem

WARNING

In order to comply with the FCC/IC adopted RF exposure requirements, this transmitter system will only be installed according to manufacturer’s Installation Guidelines. Installation of all antennas must be performed in a manner that will provide at least 20cm clearance from the front radiating aperture, to any user or member of the public.

EQUIPMENT LABELING

The manufacturer, product name, and FCC and Industry Canada identifiers of this product must appear on the outside label of the end-user equipment.

Encom Wireless Data Solutions Inc #7-640 42 Calgary, Alberta T2E 7J9 Phone: (403) 230-1122Fax: (403) 276-9575

http://www.encomwireless.com/

Ave. N.E.

This manual contains information of proprietary interest to Encom Wireless Data Solutions Inc. It has been supplied in confidence to purchasers and users of the ENC-900, and by accepting this material the recipient agrees that the contents will not be copied or reproduced, in whole or in part, withou prior written consent of Encom Wireless Data Solutions Inc.

Encom Wireless Data Solutions Inc. has made every effort to assure that this document is accurate an complete. However, the company reserves the righ to make changes or enhancements to the manual and/or the product described herein at any time an without notice. Furthermore, Encom Wireless Data Solutions Inc. assumes no liability resulting from any omissions in this document, or out of the application or use of the device described herein.

Encom’ products are appropriate for home, office, o industrial use, but are not authorized for utilization in applications where failure could result in damage to property or human injury or loss of life.

The electronic equipment described in this manual generates, uses, and radiates radio frequency energy. Operation of this equipment in a residential area may cause radio interference, in which case the user, a his own expense, will be required to take whateve measures necessary to correct the interference.

FCC Declaration of Conformity

This device complies with Part 15 of the FCC Rules. Operation is sub device ma device must accept an interference that may cause undesired operation.

Encom Wireless Data Solutions Inc., products are warrante against all failures which occur as a result of defective material or workmanship within 24 months of purchase by the user. This warranty does not extend to products that, in the opinion of Encom Wireless Data Solutions Inc.., have been subject to misuse, accidents, lightning strikes, improper installation o application, nor shall it extend to units which have, in Enco Wireless Data Solutions Inc.’s opinion, been opened, tampere with or repaired by an unauthorized facility.

All Rights Reserved. COMMPAK, ControlPAK are registered trademarks of Encom Wireless Data Solutions Inc. Microsoft and Windows are registered trademarks of Microsoft Corporation. All other products mentioned in this document are trademarks or registered trademarks of their respective holders. Revision 1.00, August 27, 2004

ect to the following two conditions: (1) this

not cause harmful interference, and (2) this

interference received includin

RF EXPOSURE.............................................................................................................................................................2

FCC NOTIFICATIONS ................................................................................................................................................2

LABELING REQUIREMENTS ...................................................................................................................................3

1. Introduction ...............................................................................................................................................................3

1.0 Product Overview................................................................................................................................................3

1.1 Features................................................................................................................................................................3

1.2 About this Manual ...............................................................................................................................................4

2. Electrical/Physical .....................................................................................................................................................6

2.0 Functional Block Diagram..................................................................................................................................6

2.1 Pin-out .................................................................................................................................................................7

2.2 Mounting Location ..............................................................................................................................................8

2.3 Antenna................................................................................................................................................................9

2.4 LED Operation ..................................................................................................................................................10

2.5 DC Characteristics.............................................................................................................................................12

3. Modes of Operation.................................................................................................................................................14

3.1 Data Mode .........................................................................................................................................................14

3.2 Command Mode ................................................................................................................................................15

3.2.1 AT Command Interface ..............................................................................................................................16

3.3 Switching Between Command and Data Modes................................................................................................16

4. Configuration...........................................................................................................................................................18

4.1 Quick Start Approach ........................................................................................................................................18

4.1.1 Checking the Link.......................................................................................................................................19

4.2 AT Commands...................................................................................................................................................19

A Answer.....................................................................................................................................................20

E Command Echo........................................................................................................................................20

I Identification............................................................................................................................................20

O On-line Mode...........................................................................................................................................20

Q Quiet Mode ..............................................................................................................................................20

V Result Codes display................................................................................................................................20

W Connection Result....................................................................................................................................21

Z Reset and load stored configuration.........................................................................................................21

&C DCD (Data Carrier Detect) ......................................................................................................................21

&D DTR (Data Terminal Ready)....................................................................................................................21

&F Load Factory Default Configuration........................................................................................................21

&K Handshaking ............................................................................................................................................22

&S DSR (Data Set Ready) .............................................................................................................................22

&V View Configuration .................................................................................................................................22

&E Framing Error Check ...............................................................................................................................22

&W Write Configuration to Memory ..............................................................................................................22

Sxxx? Read S register value ...............................................................................................................................22

Sxxx=yyy Set S register value..........................................................................................................................22

AT Command Result Codes ................................................................................................................................22

4.3 S Registers.........................................................................................................................................................23

S Register 0 - Auto Answer................................................................................................................................23

S Register 2 - Escape Code................................................................................................................................23

S Register 101 - Operating Mode ........................................................................................................................24

S Register 102 - Serial Baud Rate .......................................................................................................................26

S Register 103 - Wireless Link Rate....................................................................................................................26

S Register 104 - Network Address ......................................................................................................................27

S Register 105 - Unit Address .............................................................................................................................27

S Register 106 - Primary Hopping Pattern ..........................................................................................................27

S Register 206 - Secondary Hopping Pattern ......................................................................................................27

S Register 107 - Encryption Key.........................................................................................................................29

S Register 108 - Output Power Level ..................................................................................................................29

S Register 109 - Hopping Interval.......................................................................................................................30

S Register 110 - Data Format ..............................................................................................................................31

ENC-900 Operating Manual: Chapter 1 Introduction. 1

S Register 111 - Packet Minimum Size...............................................................................................................31

S Register 112 - Packet Maximum Size ..............................................................................................................31

S Register 116 - Packet Character Timeout.........................................................................................................31

S Register 113 - Packet Retransmissions.............................................................................................................32

S Register 114 - Sleep Mode ...............................................................................................................................32

S Register 115 - Packet Repeat Interval ..............................................................................................................33

S Register 117 - Radio Buffer Mode ...................................................................................................................33

S Register 118 - Roaming....................................................................................................................................33

S Register 119 - Quick Enter to Command .........................................................................................................34

S Register 120 - RTS/DCD Framing...................................................................................................................34

S Register 121 - DCD Timeout............................................................................................................................34

S Register 123 - Remote RSSI Reading ..............................................................................................................35

S Register 124 - Master RSSI Reading................................................................................................................35

S Register 213 - Packet Retry Limit ....................................................................................................................35

4.4 Diagnostics, Statistics and Remote Control.......................................................................................................36

4.4.1 Spectrum Analyzer Feature (ATG).............................................................................................................36

4.4.2 Statistics (ATP)...........................................................................................................................................36

4.4.3 Remote Control and Diagnostics (S101=5)................................................................................................37

A. Modem Command Summary..................................................................................................................................41

b. Factory Default Settings ..........................................................................................................................................43

C. Technical Specifications .........................................................................................................................................45

D. Glossary..................................................................................................................................................................47

1. INTRODUCTION

1.0 Product Overview

The ENC-900 is a high-performance embedded wireless data transceiver. Operating in the 902 - 928 MHz ISM band, this frequency-hopping spreadspectrum module is capable of providing reliable wireless data transfer between almost any type of equipment which uses an asynchronous serial interface. The small-size and superior RF performance of this module make it ideal for many applications. Typical uses for this module include:

• SCADA

• Traffic Control

• Remote Monitoring

• Fleet Management;

• Telemetry;

• Remote Camera/Robot Control;

• Security Systems; and,

• Display Signs.

While a pair of ENC-900 modules can link two terminal devices (“point-topoint” operation), multiple modules can be used together to create a network of various topologies, including “point-to-multipoint” and “repeater” operation. Multiple independent networks can operate concurrently, so it is possible for unrelated communications to take place in the same or a nearby area without sacrificing privacy or reliability.

1.1 Features

Key features of the ENC-900 include:

• transmission within a public, license-exempt band of the radio

spectrum as those incurred by cellular airtime);

• a serial I/O data port with handshaking and hardware flow control,

allowing the ENC-900 to interface directly to any equipment with an asynchronous serial interface.

• 64 sets of user-selectable pseudo-random hopping patterns,

intelligently designed to offer the possibility of separately operating multiple networks while providing security, reliability and high tolerance to interference;

• encryption key with 65536 user-selectable values to maximize

security and privacy of communications;

• built-in CRC-16 error detection and auto re-transmit to provide

100% accuracy and reliability of data;

• ease of installation and use – the ENC-900 module uses a subset of

standard AT style commands, very similar to those used by

traditional telephone line modems. While the typical application for the ENC-900 is to provide a short- to midrange wireless communications link between DTEs, it can be adapted to

902-928 MHz, which is license-free within North America; may need to be factory-configured

differently for some countries.

– this means that it can be used without access fees (such

ENC-900 Operating Manual: Chapter 1 Introduction. 3

almost any situation where an asynchronous serial interface is used and data intercommunication is required.

1.2 About this Manual

This manual has been provided as a guide and reference for installing and using ENC-900 wireless modem modules. The manual contains instructions, suggestions, and information which will help you set up and achieve optimal performance from your equipment using the ENC-900 module. It is assumed that users of the ENC-900 module have either system integration or system design experience. Chapter 2 details the electrical/physical attributes of the module. Chapter 3 explains the different modes of operation, and Chapter 4 provides complete details of all configuration parameters. The Appendices, including the Glossary of Terms, are provided as informational references which you may find useful throughout the use of this manual as well as during the operation of the wireless modem.

Throughout the manual, you will encounter not only illustrations that further elaborate on the accompanying text, but also several symbols which you should be attentive to:

With that in mind, enjoy extending the boundaries of your communications with the ENC-900 module.

Caution or Warning: Usually advises against some action which could result in undesired or detrimental consequences.

Point to Remember: Highlights a key feature, point, or step which is worth noting, Keeping these in mind will make using the ENC-900 more useful or easier to use.

Tip: An idea or suggestion is provided to improve efficiency or to make something more useful.

4 ENC-900 Operating Manual: Chapter 1 Introduction

ENC-900 Operating Manual: Chapter 2 Electrical/Physical 5

2. ELECTRICAL/PHYSICAL

2.0 Functional Block Diagram

Bandpass

Filter

Transceiver

Intrgrated

Circuit

39.00 MHz Crystal

Figure 1. Functional Block Diagram

Power

Amplifier

Bandpass

Filter

Microcontroller

32.768 kHz Crystal

Lowpass

Filter

T/R

Switch

Host

Connector

Lowpass

Filter

6 ENC-900 Operating Manual: Chapter 1 Introduction

2.1 Pin-out

Figure 2 provides a top-view pin-out drawing of the ENC-900 module.

Figure 2 – Pin-out (Top View)

Table 1. Pin Description

No. Pin Name Description I/O

1 GND Ground reference for logic, radio and I/O pins. 2 VCC Positive Supply for Radio Circuitry. See

Section 2.3 for DC Characteristics

3 TXD Serial Data Input. Active low (TTL Level)

input.

4 RXD Serial Data Output. Active low (TTL Level)

output.

5 DTR RS-232 Data Terminal Ready. Active low

(TTL level) input.

6 CTS RS-232 Clear to Send. Active low (TTL

level) output.

7 RTS RS-232 Request to Send. Active low (TTL

level) output.

8 DSR RS-232 Data Set Ready. Active low (TTL

level) output.

9 RSSI1 Receive Signal Strength Indicator 1. This

output is the first of the three RSSI indicators to become active high as the signal strength increases.

10 RSSI2 Receive Signal Strength Indicator 2. This

output is the second of the three RSSI indicators to become active high as the signal strength increases.

11 RSSI3 Receive Signal Strength Indicator 3. This

output is the third RSSI indicator to become active high as the signal strength increases.

12 DCD RS-232 Data Carrier Detect. Active low (TTL

level) output.

ENC-900 Operating Manual: Chapter 2 Electrical/Physical 7

2.2 Mounting Location

Mounting is accomplished via the 12 pin 0.1” header and 4 mounting holds along the edge of the board.

In order to maintain compliance with the FCC modular certification it is necessary to mount the module in such a way that user is never closer than 20 cm to the antenna.

The manual for end users of the product must contain a warning about the 20 cm separation as outlined in the beginning of this manual.

Additionally, the transceiver may not be co-located with any other antenna or transmitter.

8 ENC-900 Operating Manual: Chapter 2 Initial Setup and Configuration

2.3 Antennas and Cabling

This section describes the recommended procedure for installing cabling and antennas for use with ENC-900 module.

2.3.1 Antennas

Compliance with FCC regulations may only be maintained using the specified antennas and maximum output power cannot be exceeding 36 dBm EIRP.

See appendix A for a list of approved antennas that can be used with the ENC-900 radio modem. All the antennas listed on the appendix A can be purchased from Encom Wireless Data Solutions Inc. If you require another type of antenna, please contact Encom Wireless Data Solutions Inc. The ENC-900 cannot be used with any antenna that does not appear in Appendix A.

2.3.2 Cabling

The most common method for installing the module is to run a short RF Jumper cable from the module’s MCX connector to a reverse TNC bulkhead connector on the chassis of the equipment as shown in the following figure. These cables can be purchased from Encom Wireless Data Solutions Inc.

Reverse TNC Connector

RG174 Cable

with MCX male

connector

and Reverse TNC

bulkhead connector

MCX female connector

Cable losses are negligible for the short piece used within the chassis. Additional losses up to 0.5 dB may be present in the MCX and Reverse TNC connectors.

FCC Regulations allow up to 36dBm effective radiated power (ERP). Therefore, the sum of the transmitted power (in dBm), the cabling loss and the antenna gain cannot exceed 36dBm with respect to the isotropic radiator.

ERP is calculated as follows: ERP = Tx Power (dBm) – Cable/Connector Loss (dB) +Ant Gain (dBi)

Antenna Gain must be in dBi when calculating the 36dBm ERP limit. 1dBd = 2.15dBi

ENC-900 Operating Manual: Chapter 2 Electrical/Physical 9

2.4 LED Operation

LED functionality is dependent on the mode of operation. Lines RX/SYNC, TXMODE, and RSSI1,2 and 3 are designed to drive LED’s (active high). Table 2 explains LED operation for the various modes.

MODE RSSI1,2,3 Power Up (S0=1) off Power Up (S0=0) off Command Mode off Data Mode - Master RSSI mode based on all received packets

See Table 3

Data Mode - Repeater

During Sync. Acquisition Data Mode - Repeater When Synchronized

Data Mode - Remote During Sync. Acquisition Data Mode - Remote When Synchronized

alternating 300ms ON

RSSI mode based on packets received from Remotes*

See Table 3 alternating 300ms ON

RSSI mode based on packets received from the Repeater or Master with which it communicates

See Table 3 *If Remote have been silent for 2 seconds, repeater will base its RSSI on packets received from the Master.

Table 2. LED Operation

10 ENC-900 Operating Manual: Chapter 2 Initial Setup and Configuration

Signal strength, which is also reported in Register S123, is calculated based on the last four valid received packets with correct CRC, and represented by RSSI1, 2 and 3. For Remotes, packets are received on every single hop either from a repeater, or the master. When calculating RSSI, the master takes into consideration all packets received from Remotes and repeaters. Repeaters and Remotes only transmit back to the master when they have information to send. Therefore, if no data is coming back to the master then RSSI will never get updated at the master, and the LED’s will be off.

Signal Strength

RSSI1 RSSI2 RSSI3

(dBm)

-95 50% duty cycle off off

-90 on solid off off

-85 on solid 50% duty cycle off

-80 on solid on solid off

-75 on solid on solid 50% duty cycle

-70 on solid on solid on solid

Table 3 - RSSI mode operation

ENC-900 Operating Manual: Chapter 2 Electrical/Physical 11

IMPORTANT: For best performance, it is strongly recommended to use a separate, linearly regulated supply for Vcc Radio. Do not directly feed a switching power supply into Vcc Radio.

Caution: Using any other power supply which does not provide the proper voltage or current could damage the ENC-900 module.

2.5 DC Characteristics

Characteristic Min Typ Max Units

Supply Voltage 3.80 V Transmit Current at 1W 900 mA Receive Current 28 mA Sleep Current 1 mA

12 ENC-900 Operating Manual: Chapter 2 Initial Setup and Configuration

ENC-900 Operating Manual: Chapter 2 Electrical/Physical 13

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