CALSENSE RRE Users Manual

CalSense

“RRE” RF MODEM

User Manual

Version A2

August 15, 2005

CALSENSE

2075 Corte del Nogal

Suite P

Carlsbad, CA 92009

Company Confidential 1 Raveon Technologies Corp.

Overview

This RF MODEM is a 2 watt VHF data modem in module form, suitable for
integration in OEM products. It is complet ely self-contained, self-regulated, and
shielded. It contains a receiver, a transmitter, base-band circuits, and a
microprocessor. The user interface to it is ASYNC data in and out. Modem
operation is transparent to the user, although the configuration of the MODEM is
via the user serial port.

FCC Information

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.

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

NOTE: The manufacturer is not responsible for any radio or TV interference
caused by unauthorized modifications to this equipment. Such modifications
could void the user’s authority to operate the equipment.

This product complies with FCC Part 95 for operation on the MURS radio
service.

Features

• Built-in VHF band transceiver with integrated modem

• Unlicensed MURS band operation

• Small size

• Very low cost narrow-band radio modem

• 2 watts of RF output

• Full spec –30 to +60 degrees C

• Easily configured using “AT” commands

• User interface is asynchronous serial data for TX, RX, and configuration.

• TTL level inputs and outputs

• Low receive and standby current consumption

Company Confidential 2 Raveon Technologies Corp.

Specifications

General

All measurements made per TIA -603-B

Vpwr input Voltage ................................................................................................. 5.0V DC

Average current draw, /SLEEP asserted (low) ...........................................................<20mA

Average current draw, ENABLE negated (low) .......................................................... <200uA

Current draw when receiving data .............................................................................<90mA

Current draw when transmitting data ...........................................................................<2.5A

Power supply ripple and noise limit .................................................................<100mV RMS

Frequency Stability................................................................................. better than ±5ppm

User selectable channels: ...........................................................Five, see frequencies below

1.................................................................................................. 151.820 MHz

2.................................................................................................. 151.880 MHz

3.................................................................................................. 151.940 MHz

4.................................................................................................. 154.570 MHz

5.................................................................................................. 154.600 MHz

Serial Port Baud Rates......................................... 300, 1200, 2400, 4800, 9600, 19200, 57600

Operating temperature range .........................................................................-30ºC to +60ºC

Maximum over -the-air data rate.............................................................................. 4800bps

Storage temperature range ............................................................................-30ºC to +80ºC

TX-RX and RX-TX turn -around time..........................................................................<50mS

Wake-up time from /SLEEP ......................................................................................<60mS

Power on (or ENABLE asserted) time to operational ................................................<250mS

Transmitter

Maximum RF Power output ................................................................................... 2.0 watts

Maximum Duty Cycle...................................................................................................10%

Maximum Transmit frequency de viation ................................................................± 2.25kHz

TX Spurious outputs ............................................................................................. < -70dBc

Occupied Bandwidth mask:

(i) On any frequency from the center of the authorized bandwidth f(o) to 5.625
kHz removed from f(o): Zero dB. (ii) On any frequency removed from the center

Company Confidential 3 Raveon Technologies Corp.