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General Information and Specifications 

General Information 

This user’s manual for the SK Series Fiberoptic Switch Module contains complete operating 
instructions.  
 
The SK Series Fiberoptic Switch Module (Figure 1) is a modular 1xN controllable switch. The 
switch is microprocessor-controlled via a 26-pin parallel interface. It connects a single fiberoptic 
channel to any of N (up to 26) channels. Small and rugged, the SK Series switch module is 
designed to be used in embedded applications and is available in both single-mode and 
multimode versions.  
 

 

Figure 1: SK Series Fiberoptic Switch 

 
The operation of the switch is based on JDS Uniphase’s proven expanded beam lens 
technology using a precision stepper motor to align optical channels. The standard single-pole 
configuration consists of a single common port that can be aligned to any one of 26 ports. In 
electrical terms, the SK switch is a single-pole, 26-throw switch. The switching mechanism 
implements collimating lenses that eliminate problems associated with modal noise and provide 
low insertion loss and high repeatability. The use of collimating lenses minimizes insertion loss 
and enhances stability and repeatability. The design is optimized for high return loss. 

Single-Common (SK-C) Switch Configuration 

Figure 2 shows the single-common C configuration of the switch. 
 

 

Figure 2: SK-C Switch Configuration 

 

 

Summary of Contents for SK Series

Page 1: ...SK SERIES FIBEROPTIC SWITCH MODULE User s Manual...

Page 2: ...ii SD000166 Rev 501 June 2003 2003 JDS Uniphase All rights reserved...

Page 3: ...nal E mail Sales jdsu sales us jdsu com WWW JDSU COM Instrumentation Customer Support and Service Emergency technical support is available 24 hours a day seven days a week Phone 613 843 3000 extension...

Page 4: ...iv...

Page 5: ...plications 4 Standard Accessories 4 Specifications 5 Getting Started 7 Before Initializing and Operating the Unit 7 Initial Inspection 7 Operating Environment 7 Temperature 7 Humidity 8 Cleaning Conne...

Page 6: ...vi Testing the Switch 19 Programming Examples 20 Service 21 Storing and Shipping 21 Claims and Repackaging 21 Returning Shipments to JDS Uniphase 21...

Page 7: ...he common terminal connects to the earthed pole of the power source Willfully interrupting the protective earth connection is prohibited Never look into the end of an optical cable connected to an opt...

Page 8: ...for instructions on handling and operating the unit safely See the user s manual for instructions on handling and operating the unit safely Electrostatic discharge ESD See the user s manual for instru...

Page 9: ...itch The operation of the switch is based on JDS Uniphase s proven expanded beam lens technology using a precision stepper motor to align optical channels The standard single pole configuration consis...

Page 10: ...Features Up to 26 channels Typical insertion loss 0 4 dB Typical return loss 60 dB Simple parallel interface control Compact modular package suitable for original equipment manufacturing OEM Applicat...

Page 11: ...ngle mode 0 02 dB 0 05 dB Insertion loss stability3 0 04 dB 0 06 dB Repeatability4 sequential switching random switching 0 005 dB 0 01 dB 0 02 dB 0 05 dB Crosstalk single mode 90 dB 80 dB Input power...

Page 12: ...C maximum Power consumption1 2 20 W steady state Physical Dimensions W x H x D 79 x 28 x 140 mm Weight 280 g Environmental Operating temperature 0 to 55 C Storage temperature 40 to 70 C Humidity non c...

Page 13: ...and work in an electrostatic discharge ESD controlled area 2 Inspect the shipping container for any indication of excessive shock to the contents and inspect the contents to ensure that the shipment i...

Page 14: ...rrule that can easily be broken Optical cable ends need to be cleaned before using them with the unit The following items are required for cleaning Filtered compressed air or dusting gas for example T...

Page 15: ...her end of the pipe cleaner or swab dry the areas cleaned 7 Using the dusting gas or compressed air blow the areas cleaned Mounting Considerations The SK switch can be mounted in any orientation The o...

Page 16: ...obe Strobe input active low high to low pulse read data lines and reset line high pulse ignore state of data lines and Reset line A minimum pulse width of 1 s is required This line is pulled high inte...

Page 17: ...esistors For inputs the maximum low level output is 0 8 V and the minimum high level is 2 0 V For outputs the maximum low level output is 0 5 V and the minimum high level is 4 0 V Fiber Exit The fiber...

Page 18: ...12...

Page 19: ...escription The top and side views of the SK switch module are shown in Figure 6 Figure 6 Top and Side Views of the SK Switch Connections The way that the SK switch interfaces with the input output lin...

Page 20: ...mbers are strobed in through the data lines on high to low transitions of the Strobe line When a new channel is strobed in the SK switch immediately selects the channel The channel number is represent...

Page 21: ...0 0 0 1 0 1 1 12 1 0 0 0 1 1 0 0 13 1 0 0 0 1 1 0 1 14 1 0 0 0 1 1 1 0 15 1 0 0 0 1 1 1 1 16 1 0 0 1 0 0 0 0 17 1 0 0 1 0 0 0 1 18 1 0 0 1 0 0 1 0 19 1 0 0 1 0 0 1 1 20 1 0 0 1 0 1 0 0 21 1 0 0 1 0 1...

Page 22: ...sition Busy Output Line The Busy line provides an indication of the switching mechanism state The line is low when the switch is idle and high when the switching mechanism is moving to another port Er...

Page 23: ...strobe pulse width 1 s tmv switching cycle time 0 55 ms trh reset hold time 20 s trst reset cycle time 1 1 s Calibrating the Switch The switch is factory calibrated No further calibration is required...

Page 24: ...18...

Page 25: ...D sub Connector GND 1 GND GND 2 19 Busy 3 11 D0 4 2 Error 5 15 D1 6 3 D2 8 4 D3 10 5 D4 12 6 Strobe 13 1 D5 14 7 D6 16 8 Reset 18 9 GND 19 GND GND 20 GND 5 V DC 23 5 V DC 5 V DC 24 5 V DC To test the...

Page 26: ...TE 13 23 76 PRINT PRESS R TO Reset AND TEST CHANNEL POSITION 78 LOCATE 14 23 80 PRINT PRESS Q TO QUIT 82 LOCATE 20 23 84 PRINT 86 LOCATE 20 23 88 PRINT CHANNEL I DISPLAY CURRENT CHANNEL 100 STATUS INP...

Page 27: ...iphase sales personnel This number must be obtained prior to shipping any material to JDS Uniphase The owner s name and address the model number and full serial number of the unit the RMA number and a...

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