FOSProduct Features
Low insertion loss of 1.7 dBmaximum
Return loss better than 55 dB
Excellent repeatability of<0.03 dB (random switching)High channel isolation,–80 dB maximum crosstalk

The FOS-79710 Fiber Optic Switch Module isdesigned for high return loss, low insertion loss, andexcellent stability. Transparent to signal formats andbandwidths, this optically passive fiber optic switch isbi-directional in operation and offers a choice of timed,
random, sequential or triggered switching modes.
In the FOM-7900B System Mainframe, the front panel
or GPIB-accessible command set controls the FOS-79710
Fiber Optic Switch Module. A single channel input can goto any of the 4 outputs via the FOM-7900B control panel.
A “blocking” position switches the input to a zero-reflection
terminaton. The user can define and initiate sequential
switching through an external trigger, or by defining aswitch interval time.

Switch Wavelengths Easily
During Multiple Channel Testing

79710
Fiber Optic
Switch Module

FOS79710
Fiber Optic
Switch Module

Product Overview
supporting high-speed GPIB protocol — allowing you to control up to 200 source modules
from a single GPIB address.

Typical applications include routing a signal
around the device under test (DUT) for a reference measurement, sequential switching of thetest signal to numerous DUTs, or testing a single
DUT at sequentially switched wavelengths.

The First Name in Fiber Optic Test

Today’s largest world-leading fiber optic component manufacturers are testing with morelaser sources from ILX Lightwave than from anyother company. There are good reasons for this.
You tap into the experience built on this large
installed base when you choose ILX Lightwave
for your test system.

Multi-channel Flexibility

Through the FOM-7900B System Mainframe,
FOM-79710 modules can be controlled via an
intuitive front panel, or by a state-of-the-art
GPIB/IEEE-488.2 interface. This interface uses
the National Instruments TNT 488® chip-set,Specifications
GENERAL

Configuration:
Wavelength Range:
Fiber Type:
Connector Type:1
Insertion Loss2
Typical:Maximum:3
Crosstalk:Polarization Dependent Loss:4
Repeatability:5
Switching Time:6
Maximum
Continuous Input Power:
Return Loss:
Switch Life:
Operating Temperature:
Storage Temperature:
Operating Humidity:

NOTES
1x4
1280–1650 nm
9/125, SMF 28
FC/APC
1.2 dB
1.7 dB<–80 dB<0.05 dB
<0.03 dB
16 ms/channel+300 ms (maximum)

123456

Other connector options available upon request.
Measured at 23°C ±5°C.
Maximum insertion loss, any module output port.
Measured at 1550 nm.
Sequential switching, 100 cycles measured atconstant temperature after module warmup.
Excluding GPIB and mainframe processor latency.

In keeping with our commitment to continuous improvement,
ILX Lightwave reserves the right to change specifications
without notice and without liability for such changes.

ORDERING INFORMATION
FOS-79710

1x4 Fiber Optic Switch Module+24 dBm>55 dB>10 million cycles
15oC—35oC–20oC to 70oC
<85% RH,
non-condensing

For information call
P.O. Box 6310, Bozeman, MT 59771 • FAX: 406-586-9405

www.ilxlightwave.com

1-800-459-9459
International Inquiries: 406-586-1244
email: sales@ilxlightwave.com

Rev. 4/03/02