RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 E-mail: info@rfm.com
http:\\www.rfm.com
©1998 by RF Monolithics, Inc. The stylized RFM logo and RFM are registered trademarks of RF Monolithics, Inc. DR1001-041598
Page 1 of 2
Virtual Wire® Development Kits
DR1001B2-1-DK 433.92 MHz
DR1002B2-1-DK 916.50 MHz
Introduction
RFM’s DR-Series Virtual Wire® Development Kits
are tools for evaluating the feasibility of low power
wireless data communications applications. The Kits
also facilitate actual system development. Kit modules,
such as the radio transceiver boards, are available sepa-
rately from RFM for use in customer end products.
Each Development Kit Contains:
•Two data radio transceiver boards
•Two host protocol boards
•Two reference antennas
•Two sets of batteries
•3.5 floppy disk with example application software
•Manual
Each Virtual Wire Development Kits Include These Key Features:
•“Out-of-the-box” operation between two PCs
•3V low-current UHF data radio transceivers
•Excellent receiver off-channel interference rejection
•Receiver AGC for resistance to on-channel interference
•3V low-current protocol boards based on an Atmel AT89C2051 microcontroller
•On-board 3V logic to RS232C level conversion with bypass provisions for direct 3V
logic interface
•Packet link-layer protocol with ISO3309 error detection and automatic packet retrans-
mission; up to 32 message bytes per packet (ASCII or binary)
•DC-balanced data coding for stable RF transmission performance
•Simple protocol-to-application interface plus example application software
•Diagnostic LEDs for system performance evaluation
•Up to 15 different node addresses supported; jumper programmable
•Battery or external 3V operation
Virtual Wire Development Kit
RF Monolithics, Inc. Phone: (972) 233-2903 Fax: (972) 387-8148 E-mail: info@rfm.com
http:\\www.rfm.com
©1998 by RF Monolithics, Inc. The stylized RFM logo and RFM are registered trademarks of RF Monolithics, Inc. DR1001-041598
Page 2 of 2
Development Kit Specifications
Operating Frequency
DR1001B2-1-DK 433.92MHz
DR1002B2-1-DK 916.50 MHz
Modulation On-Off Keyed
Antenna 50 ohm
TX Frequency Tolerance Less than ±200kHz, including set-on,
temperature, and aging drift (5 year)
TX Output Power -5 dBm minimum
TX Harmonics
DR1001B2-1 Less than -45 dBc
DR1002B2-1 Less than -32 dBc
Receiver Performance (4.8 kbps)
DR1001B2-1 BER less than 10E-4 for a -92 dBm input
DR1002B2-1 BER less than 10E-4 for a -76 dBm input
RX Off-Channel Rejection
DR1001B2-1 Greater than 60 dB, 0.25 to 420 MHz and
420 to 2500 MHz
DR1002B2-1 Greater than 60 dB, 0.25 to 890 MHz and
945 to 2500 MHz
Transceiver Mode Change
RX to TX 1 ms
TX to RX 5 ms
Host Interface RS232 DCE compatible 9-pin female (modem)
connector, 4.8 kbps, byte asynchronous, 1 start bit,
8 data bits, no parity, 1 stop bit
Power Supply 2.7 to 3.3 Vdc, either from 2 AAA batteries or
from an external regulated supply with less than
10 mV p-p ripple at 20 mA
Operating Temperature Range 0 to 70 deg C
Storage Temperature Range -40 to +85 deg C
