Telonics SST901 User Manual

TELEMETRY

-

ELECTRONICS CONSULTANTS

932 E. IMPALA AVENUE  MESA, ARIZONA 85204-6699 U.S.A.

TEL [phone]  FAX [phone]

E-MAIL [e-mail]

www.telonics.com

Model SST-901

Spread Spectrum Radio Modem

User’s Guide

PB008915 Rev A 2011.10.27

Copyright Notice

Copyright  2011 Telonics, Inc.
All Rights Reserved.

No part of this publication may be copied without the express written permission of Telonics, Inc.,
932 E. Impala Ave., Mesa, AZ 85204.

TABLE OF CONTENTS

Model SST-901 .............................................................................................................................................1

Spread Spectrum Radio Modem...................................................................................................................1

User’s Guide..................................................................................................................................................1

1. Notice to United States Users ...................................................................................................................3

2. Notice to Canadian Users .........................................................................................................................3

3. Product Overview ......................................................................................................................................4

4. Hardware Connections ..............................................................................................................................4

4.1 RF Connection .....................................................................................................................................4

4.2 Power and Interface Connection .........................................................................................................4

4.2.1 Electrical characteristics for host interface signals ......................................................................6

4.2.2 Electrical characteristics for power supply inputs ........................................................................6

4.2.3 Timing Characteristics for host interface signals .........................................................................6

5. Physical Specifications ..............................................................................................................................7

5.1 Module Dimensions .............................................................................................................................7

6. SST-901 SPECIFICATIONS .....................................................................................................................8

PB008915 Rev A Page 2 of 8

1. Notice to United States Users

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 undesirable operation. In normal operation the unit and approved antenna is
positioned several feet from the user but under no circumstance should the antenna be positioned less than 20
cm from the operator.

The user is cautioned that changes or modifications not expressly approved by Telonics could void the user’s
authority to operate the equipment. This restriction includes the use of specified antennas which have been
certified for use with the SST-901M. See approved antenna configuration section below.

The ST 901M module has been labeled with its own FCC ID number, and if the FCC ID is not visible when the
module is installed inside another device, then the outside of the finished product into which the module is
installed must also display a label referring to the enclosed module. This exterior label can use wording as
following:

“Contains Transmitter Module FCC ID: JYL-SST901”

-or-

“Contains FCC ID: JYL-SST901”

RF Exposure
The following statement must be included as a CAUTION statement in manuals and OEM products to alert
users of FCC RF Exposure compliance:
“To satisfy FCC RF Exposure requirements for mobile and base station transmission devices, a separation
distance of 20cm or more should be maintained between the antenna of this device and persons during
operation. To ensure compliance, operation at closer than this distance is not recommended.
The antenna(s) used for this transmitter must not be co-located or operating in conjunction with any other
antenna or transmitter.”

2. Notice to Canadian Users

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and
maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio
interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically
radiated power (e.i.r.p.) is not more than that necessary for successful communication.

The SST-901 (IC: 4610A-SST901) has been approved by Industry Canada to operate with the antenna type
listed below with the maximum permissible gain and antenna impedance indicated. Other antenna types, or
antennas of the same type having a gain greater than the maximum gain indicated, are strictly prohibited for use
with this device.

Approved Antenna Type

Inverted ‘L’ Antenna (ILA) w/ gnd plane CM008916-001 0.0dBi 50Ω

This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the
following two conditions: (1) this device may not cause interference, and (2) this device must accept any
interference, including interference that may cause undesired operation of the device.

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de
licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de
brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage
est susceptible d'en compromettre le fonctionnement.

When incorporated into a host device, the following information must be included on the host label:

“Contains IC ID: 4610A-SST901”

Telonics P/N Max Gain Req’d Impedance

PB008915 Rev A Page 3 of 8

3. Product Overview

The Telonics SST-901 is a frequency hopping spread spectrum transceiver that operates in the 902 – 928 MHz
industrial, scientific, and medical (ISM) frequency band. The SST-901 is characterized as a “server”, a device
that accepts requests from “client” devices such as the Telonics SST-901M.

The SST-901 design is modular and is intended to be used with a host controller that provides power, as well as
a digital control and data communication interface. The SST-901 interfaces to its host via a 14-pin male
connector and also provides a coaxial cable connection for the antenna.

A typical system environment includes one client SST-901M and one or more server systems consisting of an
SST-901 and its host controller. The client SST-901M initiates a connection with the desired server, and once
established, transfers data to and from that server using a file transfer protocol.

Communications between the SST-901M and SST-901 are performed using an on-air bit rate of 19200 bits per
second. Interleaving and error control coding methods are employed to combat the effects of fading and
interference. The combined costs of error control coding and data transfer overhead yield an effective transfer
rate of approximately 9600 bits per second.

4. Hardware Connections

4.1 RF Connection
RF connection to the antenna is via a 1.37mm x 6” (15cm) coaxial cable. The antenna end of the coaxial cable

is soldered directly to the feedpoint of the ILA antenna, Telonics P/N CM008916-001. The SST-901 module is

not approved for any other antenna type.

4.2 Power and Interface Connection
The SST-901 module may be soldered directly to the host PWB. In applications where a connector is desired,

the recommended mating connector for the 14 pin male header is Samtec SLM-115-01-S-S or equivalent. Pin
functions are described in Table 4.2.

Table 4.2 Interface Connector Description

Pin

Signal Direction* Description

1 GND Input System ground.

2 N/C No connection (not used).

3 VPA Input High current RF section power supply.

4 VMAIN Input Low current RF and digital logic power supply.

5 N/C No connection (not used).

6 CTS\ Output Clear To Send signal; asserted when low. This signal provides flow control

from the host to the SST-901. When asserted, this signal indicates to the host
that the SST-901 is able to accept a data byte. The CTS signal de-asserts at
the next rising edge of SCLK, and re-asserts when the microcontroller in the
SST-901 has retrieved the byte and is again ready to receive.

7 SDI Input Serial data input; non-inverted.

8 SCLK Input Serial clock input. SCLK must idle high. Data are clocked in on the rising

edge and clocked out on the falling edge.

9 SDO Output Serial data output; non-inverted.

10 LE Input Listen enable signal; asserted when high. The host device pulses this signal

(L-H-L) to command the SST-901 to power up its receiver and listen for a
connect sequence from a client SST-901M.

11 ATTN Output Attention signal; asserted when high. When asserted, this indicates that a

packet is available for the host device to retrieve. The packet may be a
response to a request from the host device, or may be a packet received via

PB008915 Rev A Page 4 of 8

the RF link. The SST-901 de-asserts ATTN when the host asserts CS.

12 RESET Input Reset signal, asserted when high. This signal must be pulsed (L-H-L) to reset

the SST-901 microcontroller.

13 CS Input SST-901 serial interface chip select; asserted when high. CS must be asserted

when transferring data using the SCLK, SDI, and SDO signals.

14 GND Input System ground.

* With respect to SST-901.

PB008915 Rev A Page 5 of 8

4.2.1 Electrical characteristics for host interface signals

The following table describes the electrical characteristics for interface signals: ATTN, CS, CTS\, LE, SCLK,
SDI, SDO, and RESET.

Table 4.2.1 Electrical characteristics for host interface signals

Parameter Symbol Min Typ Max Unit

Input high voltage VIH 2.4 3.0 V

Input low voltage VIL 0.0 0.6 V

Output high voltage VOH 2.5 3.0 V

Output low voltage VOL 0.5 V

Low level output current IOL 5.0 mA

High level output current IOH -5.0 mA

4.2.2 Electrical characteristics for power supply inputs

The following table describes the electrical characteristics for the VMAIN and VPA power supply inputs.

Table 4.2.2 Electrical characteristics for power supply inputs

Parameter Symbol Min Typ Max Unit

Low current RF / digital logic power supply
voltage

High current RF section power supply voltage VPA 2.7 3.6 4.0 V

Low current RF / digital logic power supply current
(operating)

High current RF section power supply current IPA 600 900 mA

Low current RF / digital logic power supply
standby current

VMAIN 3.3 3.6 5.0 V

IMAIN 30 50 mA

IMAINSB 5 10 uA

4.2.3 Timing Characteristics for host interface signals

The following table describes the timing characteristics for interface signals LE, SCLK, SDI, SDO, and RESET.

Table 4.2.3 Timing Characteristics for host interface signals

Parameter Symbol Min Typ Max Unit

SCLK input cycle time tCK 200 ns

SCLK input high pulse width tCKH 100 ns

SCLK input low pulse width tCKL 100 ns

SDO output delay time tOD 80 ns

SDO hold time tOH 0 ns

SDI setup time tISU 70 ns

SDI hold time tIH 90 ns

Reset pulse width tRPW 50 us

Reset recovery time tRRT 50 ms

LE pulse width tLEPW 1 ms

PB008915 Rev A Page 6 of 8

5. Physical Specifications

5.1 Module Dimensions

PB008915 Rev A Page 7 of 8

6. SST-901 SPECIFICATIONS

GENERAL

FCC ID JYLSST901
Industry Canada ID 4610A-SST901
Frequency Range 902.102 - 927.908 MHz.
Spread Spectrum Type Frequency Hopping FSK
Applicable FCC Rules Part 15 (15.247)
Number of RF Frequency Sets 4 sets, non overlapping

Set 1: 902.102 - 907.100 MHz
Set 2: 908.120 - 913.220 MHz
Set 3: 915.260 - 920.360 MHz

Set 4: 922.808 - 927.908 MHz
Nominal Channel Frequency Spacing 102 kHz
Data Interface Logic-Level Clocked Serial

POWER REQUIREMENTS

RF/Digital Supply 3.6V nominal (3.3 - 5.0 Vdc)
Power Amplifier Supply 3.6V nominal (2.7 – 4.0 Vdc)
Transmit Current 600 mA typ @ 3.6V
Receive Current 50 mA typ @ 3.6V
Stand-by Current 10µA typ

TRANSMITTER

Power Output 500 mW (+27dBm) nominal
Frequency Stability ± 0.5 ppm @ 25˚C

± 1.0ppm -30 < T < +60 ˚C
Modulation Data Rate 19.2 kbps
Modulation Type FSK
Modulation Bandwidth (99%) 40 kHz typ
Load Impedance 50 Ω

RECEIVER
Noise Figure <3.0 dB
Sensitivity for 10

-4

BER @ 19.2 kbps <-110 dBm typ

MECHANICAL / ENVIRONMENTAL

RF Connection 1.37mm coaxial cable, 6” long, no connector
Power and Interface Connector 14pin x 0.05” SIP connector
Recommended Mating Connector Samtec SLM-115-01-S-S or equivalent

OR direct solder to host PWB
Dimensions, excluding connector 1.90” l x 1.00” w x 0.18” h
(48.3 x 25.4 x 4.6 mm)
Operating Temperature Range -40 to +70 ˚C
Humidity Operating: ≤ 60%, non-condensing
Storage: ≤

75%, non-condensing

PB008915 Rev A Page 8 of 8