Fluke 2635A-RF900USB User Manual

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.

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: [phone]
Japan: [phone]
Singapore: [phone]
Anywhere in the world: [phone]

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

Config
Switch

The Modem requires a PC with one free USB port
and Windows XP, 2000, or 98 SE.

Antenna

Reset
Switch

Installation

Data Out
Data In
Power Indicators

USB Port
Connector

O

n

Off

D

a

D

ta

a

P

ta

ow

In

e

r

e

t

a

r

R

n

o

n

P

e

t

n

A

h

itc

fig

w

n

S

o

C

h

t

itc

e

s

w

e

S

R

O

u

t

Seria

P

o

l

r

t

7

-1
8

O-O

V

D

-O

C

Power Adapter Jack

efef01.eps

Figure 1. 2635A-RF900USB 900 MHz RF USB Modem

PN 2558814 November 2005 ©2005 Fluke Corporation. All rights reserved. Printed in U.S.A. 1

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 2635A­RF900 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.

2635A-RF900USB

Instruction Sheet

Base Station Modem

The Modem is connected to the PC as the base
station. To set up this modem:

1. Connect the Modem to a free USB port on the PC
using the supplied USB cable.

2. The Windows “Found New Hardware Wizard”
will appear on the PC. Click the “Next” button to
start the driver installation.

3. Depending on the version of Windows, select
either the “Install from a specific list or location”
or “Search for a suitable driver” option, then click
“Next”.

4. Verify the MaxStream CD is inserted. Check
“Search removable media (CD-ROM…)” or
“CD-ROM drives” box, and then click the “Next”
button.

5. If a “Windows Logo Testing” alert box pops up,
click “Continue Anyway”.

6. Click the “Next”button again if necessary to
accept the selected driver.

7. Click the “Finish” button.

8. Repeat steps 2 through 7 to install the next driver.

9. Connect the supplied antenna to the Modem.

Remote Station

Set up a 2635A-RF900 Serial RS-232 Modem and
connect to the Hydra Data Logger as described in its
own instruction sheet.

Operation

Start the Hydra software and turn the Hydra Data
Logger power on.

Connect through the Hydra software as if using a
standard RS-232 connection. Basic line-of-site range
is approximately 1500 ft. (450 m). The range varies
with antenna height.

The Modem will operate in its default factory setting
as an accessory to the Hydra Series. Refer to the
manufacturer’s instructions and supplied software for
operating the Modem in other applications.

To reset the Modem to its factory settings, push the
Reset Switch located on the Antenna-side of the
Modem.

Specifications

Performance

Indoor/Urban Range: Up to 1500 ft (450 m)
Outdoor LOS Range: Up to 7 miles (11 km) w/ dipole
antenna
Serial Data Throughput: 9600 bps
RF Baud Rate: 10,000 bps
Transmit Power Output: 140 mW (21.5 dBm)
Receiver Sensitivity: -110 dBm

General

Frequency: 902-928 MHz
Spread Spectrum: Frequency Hopping, Wide band
FM modulator
Network Topology: Peer-to-Peer, Point-to-multipoint,
Point-to-Point, Multi-drop
Channel Capacity: 7 hop sequences share 25
frequencies
Serial Data Interface: USB
I/O Data Rate: Software selectable 1200 -
57600 bps

Power Requirements

Supply Voltage: USB bus-powered or 5-12 V dc

external
Transmit Current: 215 mA
Receive Current: 85 mA

Physical Properties

Enclosure: 7.1 oz (200 g), extruded

aluminum, black anodized
Enclosure Size: 2.75 in x 5.50 in x 1.124 in

(7.90 cm x 13.90 cm x 3.80 cm)
Operating Temperature: 0 to 70 °C (commercial)

Antenna

Type: ½ wave dipole whip, 6.75 in

(17.1 cm), 2.1 dBi Gain

Not licensed for operation outside of the United
States.

LIMITED WARRANTY AND LIMITATION OF LIABILITY

This Fluke product will be free from defects in material and
workmanship for 90 days from the date of purchase. This warranty
does not cover fuses, disposable batteries, or damage from
accident, neglect, misuse, alteration,contamination, or abnormal
conditions of operation or handling. Resellers are not authorized to
extend any other warranty on Fluke’s behalf. To obtain service
during the warranty period, contact your nearest Fluke authorized
service center to obtain return authorization information,
then send the product to that Service Center with a description of
the problem.

THIS WARRANTY IS YOUR ONLY REMEDY. NO OTHER WARRANTIES,
SUCH AS FITNESS FOR A PARTICULAR PURPOSE, ARE EXPRESSED
OR IMPLIED. FLUKE IS NOT LIABLE FOR ANY SPECIAL, INDIRECT,
INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, ARISING
FROM ANY CAUSE OR THEORY.

Since some states or countries do not allow the exclusion or
limitation of an implied warranty or of incidental or consequential
damages, this limitation of liability may not apply to you.

Fluke Corporation
P.O. Box 9090
Everett, WA 98206-9090
U.S.A.

11/99

Fluke Europe B.V.
P.O. Box 1186
5602 BD Eindhoven
The Netherlands

2