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PN 2558814 November 2005 ©2005 Fluke Corporation. All rights reserved. Printed in U.S.A. 1
2635A-RF900USB
900 MHz RF USB Modem
Instruction Sheet
Introduction
The 2635A-RF900USB 900 MHz RF USB Modem
(referred to as “the Modem”) is a radio-frequency
transceiver that, used together with the 2635A-RF900
Serial RS-232 Modem, creates a wireless link
between Fluke Hydra Series Data Loggers and a
computer (PC) running Hydra application software.
Note
The modem operates in the 900 MHz
frequency range and is approved by the FCC
for use in the United States. Operation in
other countries may violate local regulations.
When operating outside the United States,
check with the appropriate governing agency
in the host country prior to Modem operation.
This instruction sheet assumes familiarity with the
Hydra software and Hydra Series Data Logger
operation. If unfamiliar with Hydra software or the
Hydra Series hardware, refer to the software user’s
documentation or the appropriate Hydra Series Users
manual. The Modem is shown in Figure 1.
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Power Adapter Jack
USB Port
Connector
Data Out
Data In
Power Indicators
Antenna
Config
Switch
Reset
Switch
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Figure 1. 2635A-RF900USB 900 MHz RF USB Modem
Contacting Fluke
To locate an authorized service center, visit us on the
World Wide Web at www.fluke.com
or call Fluke
using any of the following numbers:
USA: 1-888-99-FLUKE (1-888-993-5853)
Canada: 1-800-36-FLUKE (1-800-363-5853)
Europe: +31 402-678-200
Japan: +81-3-3434-0181
Singapore: +65-738-5655
Anywhere in the world: +1-425-446-5500
Shipping Contents
The Modem comes with the following items:
• Instructions for use with the Hydra Series (this
sheet)
• Quick Start Guide
• CD-ROM with documentation and software
• ½ wave Dipole Antenna
• USB (Universal Serial Bus) 6 ft. cable
Requirements
The Modem requires a PC with one free USB port
and Windows XP, 2000, or 98 SE.
Installation
Each wireless system requires two modems – one
base station connected to a PC, and one remote station
connected to a Hydra Data Logger. This USB Modem
is used as a base station connected to the PC; the
remote station connected to the Hydra is a 2635A-
RF900 Serial RS-232 Modem.
To ease system setup, the Modem’s factory default
settings are correct for proper PC-to-Hydra operation
without further adjustments. There are no setup
differences between the base and remote stations.