JDS Uniphase SCG Series User manual

SCG SERIES
FIBEROPTIC SWITCH
User’s Manual

Contents
Safety Information, Instructions, and Symbols........................................................................ 1
Safety Information .............................................................................................................1
Classification ......................................................................................................... 1
Disconnecting from Line Power............................................................................. 1
Line Power Requirements ..................................................................................... 1
Fuse Type .............................................................................................................1
Laser Application...................................................................................................1
Safety Instructions.............................................................................................................2
Before Initializing and Operating the Unit.............................................................. 2
Operating the Unit ................................................................................................. 2
Safety Symbols .................................................................................................................3
Compliance ....................................................................................................................... 4
FCC Compliance ................................................................................................... 4
CE Compliance ..................................................................................................... 5
CSA / IEC Compliance .......................................................................................... 5
UL Compliance...................................................................................................... 5
General Information and Specifications ................................................................................... 6
General Information ..........................................................................................................6
Multiple-Common (SCG-D) Switch Configuration ................................................. 7
Single-Step Multiple-Common (SCG-E) Switch Configuration .............................. 7
Multiple-Common Blocking (SCG-F) Switch Configuration ................................... 8
Key Features ......................................................................................................... 8
Applications ........................................................................................................... 8
Standard Accessories ...........................................................................................8
Specifications .................................................................................................................... 9
Getting Started .......................................................................................................................... 11
Before Initializing and Operating the Unit........................................................................11
Initial Inspection .............................................................................................................. 11
Operating Environment ................................................................................................... 12
Temperature........................................................................................................ 12
Humidity .............................................................................................................. 12
Ventilation............................................................................................................ 12
Storing and Shipping.......................................................................................................12
Claims and Repackaging ....................................................................................12
Returning Shipments to JDS Uniphase............................................................... 12
Cleaning Connectors.......................................................................................................13
Installing the Switch ........................................................................................................ 14
Operating and Maintenance Instructions ............................................................................... 15
Front Panel...................................................................................................................... 15
Operating Keys.................................................................................................... 16
Status LEDs ........................................................................................................16
Rear Panel ...................................................................................................................... 17
Making External Switch Module Connections ................................................................. 17
External Switch Module without TTL Input Controls............................................ 17
SD000343 Rev. A August 2000

External Switch Module with TTL Input Controls................................................. 18
Sample Driver Application ................................................................................... 18
Powering Up the Unit ...................................................................................................... 19
Selecting Input Channels and Output Channels ............................................................. 19
Saving and Recalling Switch or Relay Driver States....................................................... 20
Displaying Switch Details or Controlling Direct Drivers................................................... 20
Changing or Verifying the GPIB Address........................................................................ 21
Calibrating the Unit..........................................................................................................21
Maintaining the Unit ........................................................................................................21
Programming Guide ................................................................................................................. 23
GPIB Pin Assignment...................................................................................................... 23
Setting the GPIB Address ............................................................................................... 24
RS232C Pin Assignment................................................................................................. 24
Operation and Query Commands ...................................................................................25
Command Parser Rules ...................................................................................... 25
Operation Commands .........................................................................................26
Query Commands ...............................................................................................27
Status Reporting and Service Request Control ..............................................................30
Condition Register............................................................................................... 30
Status Register.................................................................................................... 30
SRQ Mask Register............................................................................................. 31
GPIB Programming Examples ........................................................................................31
Sending Commands............................................................................................ 32
Serial Polling the Status Register........................................................................ 32
Generating a Service Request Interrupt.............................................................. 33
Learn Query (LRN?)............................................................................................ 33
RS232C Programming Examples ...................................................................................33
Sending Commands............................................................................................ 34
Querying Status................................................................................................... 34
Reading the Status Register ...............................................................................34
For sales and service information,
contact JDS Uniphase or your local representative.
JDS Uniphase Corporation
570 West Hunt Club Road
Nepean, Ontario, Canada
K2G 5W8
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Website: http://www.jdsunph.com
SD000343 Rev. A August 2000

Safety Information, Instructions, and Symbols
Safety Information
Classification
The unit consists of an exposed metal chassis that is connected directly to earth via a power
cord and, therefore, is classified as a Class 1 instrument. Class 1 refers to equipment relying on
ground protection as a means of shock protection.
The following symbol is used to indicate a protective conductor terminal in the unit.
Disconnecting from Line Power
Some of the circuits are powered whenever the unit is connected to the AC power source (line
power). To ensure that the unit is not connected to the line power, disconnect the power cord
from either the power inlet on the unit’s rear panel or from the AC line-power source
(receptacle). The power cord must always be accessible from one of these points. If the unit is
installed in a cabinet, the operator must be able to disconnect the unit from the line power by
the system’s line-power switch.
Line Power Requirements
The unit can operate from any single-phase AC power source that supplies between 100 and
240 V at a frequency range of 50 to 60 Hz. The maximum power consumption is 100 VA.
Fuse Type
The fuse type used by the unit is (5x20) mm, T1A/250 V (slow).
Laser Application
Warning
The unit is rated as a system for use with laser equipment. The laser class of
any unit connected to the SCG unit applies to the SCG unit. Follow appropriate
laser safety procedures for that class.
Safety – 1

Safety Instructions
The following safety instructions must be observed whenever the unit is operated, serviced, or
repaired. Failure to comply with any of these instructions or with any precaution or warning
contained in the user’s manual is in direct violation of the standards of design, manufacture, and
intended use of the unit. JDS Uniphase assumes no liability for the customer’s failure to comply
with any of these safety requirements.
Before Initializing and Operating the Unit
Inspect the unit for any signs of damage, and read the user’s manual thoroughly.
Install the unit as specified in the Getting Started section.
Ensure that the unit and any devices or cords connected to it are properly grounded.
Operating the Unit
Warning
To avoid the risk of injury or death, always observe the following precautions
before initializing the unit:
• When using a voltage-reducing autotransformer to power the unit, ensure
that the common terminal connects to the earthed pole of the power source.
• Use only the type of power cord supplied with the unit.
• Connect the power cord only to a power outlet equipped with a protective
earth contact. Never connect to an extension cord that is not equipped with
this feature.
• Do not interrupt the protective earth grounding. Any such action can lead to
a potential shock hazard that can result in serious personal injury.
• Do not operate the unit if an interruption to the protective grounding is
suspected. In this case, ensure that the unit remains inoperative.
• Willfully interrupting the protective earth connection is prohibited.
• Never look into the end of an optical cable connected to an optical output
device that is operating. Laser radiation is invisible, and direct exposure can
severely injure the human eye. For more information, see the user’s manual
of the laser source in use.
• Turning off the power to the device does not always block the externally
supplied radiation to the connector at the output of the unit.
• Do not use the unit outdoors.
• To prevent potential fire or shock hazard, do not expose the unit to any
source of excessive moisture.
• Use only the type of fuse specified by the manufacturer as appropriate for
this unit. Do not use repaired fuses, and avoid any situations that can short-
circuit the fuse.
• Do not operate the unit when its covers or panels have been removed.
Safety – 2

• Unless absolutely necessary, do not attempt to adjust or perform any
maintenance or repair procedure when the unit is opened and connected to
a power source.
• Repairs are to be carried out only by a qualified professional.
• Do not attempt any adjustment, maintenance, or repair procedure to the
unit’s internal mechanism if immediate first aid is not accessible.
• Disconnect the power cord from the unit before adding or removing any
components.
• Operating the unit in the presence of flammable gases or fumes is extremely
hazardous.
• Do not perform any operating or maintenance procedure that is not
described in the user’s manual.
• Some of the unit’s capacitors can be charged even when the unit is not
connected to the power source.
Safety Symbols
The following symbols and messages can be marked on the unit (Table 1). Observe all safety
instructions that are associated with a symbol.
Table 1: Safety Symbols
Symbol Description
Laser safety. See the user’s manual 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 instructions on
handling and operating the unit safely.
Frame or chassis terminal for electrical grounding within the unit.
Protective conductor terminal for electrical grounding to the earth.
(table continued)
Safety – 3

Symbol Description
WARNING
The procedure can result in serious injury or loss of life if not carried out
in proper compliance with all safety instructions. Ensure that all
conditions necessary for safe handling and operation are met before
proceeding.
CAUTION
The procedure can result in serious damage to or destruction of the unit if not
carried out in compliance with all instructions for proper use. Ensure that all
conditions necessary for safe handling and operation are met before
proceeding.
Compliance
FCC Compliance
The Federal Communications Commission (FCC) of the United States of America requires that
equipment operating in that country does not cause interference to communications. The unit
has been tested and found to comply with the limits for a Class A digital device, pursuant to Part
15 of Title 47 of the Code of Federal Regulations for Radio Frequency Devices. Operation is
subject to the following two conditions, which the FCC requires to be labeled on the unit:
• This device may not cause harmful interference.
• This device must accept any interference received, including interference that may cause
undesired operation.
FCC rules require that the following note and subsequent information be included in this
manual:
Note: This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely
to cause harmful interference in which case the user will be required to correct the interference
at his own expense.
These limits are designed to provide reasonable protection against harmful interference in a
commercial installation. The unit generates, uses, and radiates radio frequency energy and, if
not installed and used in accordance with instructions, can cause harmful interference to radio
communications.
Any user modification made to the unit voids the user’s authority to operate the unit under the
FCC rules.
If this unit is used in a residential setting, resulting interference must be corrected by the user.
For more information, see Title 47 of the Code of Federal Regulations at
http://www.access.gpo.gov/nara/cfr/cfr-table-search.html.
Safety – 4

CE Compliance
The unit has been designed and tested to comply with directive 73/23/EEC and its subsequent
amendments by the European Community (EC or CE). The directive relates to electrical
equipment designed for use within certain voltage limits. It ensures that electrical equipment is
constructed with good engineering practice in safety matters.
The unit has been designed and tested to comply with directive 89/336/EEC and its subsequent
amendments. The directive relates to electromagnetic compatibility. It demands that
electromagnetic disturbance does not exceed a prescribed level; that the equipment be immune
to a prescribed level of ambient level of interference; that the equipment be protected against
electrostatic discharges; and that the equipment be immune to all electrical shock wave
disturbances. As of 1997, measures have been added to test for fire hazard, electric shock
hazard, and also external exposure to other forms of energy.
The requirements specified by directive 89/336/EEC are as follows. CE compliance requires
that the manufacturer or its authorized representative established within the Community affix the
EC conformity mark to the apparatus or else to the packaging, instructions for use, or guarantee
certificate. The EC conformity mark shall consist of the letters CE as specified and the figures of
the year in which the mark was affixed. This mark should, where appropriate, be accompanied
by the distinctive letters used by the notified body issuing the EC type-examination certificate.
Where the apparatus is the subject of other Directives providing for the EC conformity mark, the
affixing of the EC mark shall also indicate conformity with the relevant requirements of those
other Directives.
CSA / IEC Compliance
The unit complies with certain standards of the Canadian Standards Association (CSA) and the
International Electrotechnical Commission (IEC).
The unit is in Installation Category (Overvoltage Category) II under IEC 664. IEC 664 relates to
impulse voltage levels and insulation coordination. The particular category is defined as: local
level, appliances, portable equipment, etc, with smaller transient overvoltages than Installation
Category (Overvoltage Category) III.
The unit is in the Pollution Degree 2 category under IEC 1010-1 and CAN/CSA-C22.2 No.
1010.1. The IEC standard on Safety Requirements for Electrical Equipment for Measurement,
Control, and Laboratory Use relates to insulation coordination. The CSA standard is on Safety
Requirements for Electrical Equipment for Measurement Control, and Laboratory Use, Part I:
General Requirements. The Pollution Degree 2 category is defined as follows: “Normally only
non-conductive pollution occurs. Occasionally, however, a temporary conductivity caused by
condensation must be expected.”
UL1Compliance
The unit complies with Underwriters Laboratories (UL) standard 1950, the Standard for Safety
Information Technology Equipment.
1UL is a registered trademark of Underwriters Laboratories Inc.
Safety – 5

General Information and Specifications
General Information
This user’s manual for the SCG Series Fiberoptic Switch contains complete operating
instructions.
The SCG Series Fiberoptic Switch is a programmable switch (Figure 1) that aligns multiple
inputs with multiple outputs. Performance, configuration, and flexibility are suitable for a wide
range of applications, including fiberoptic component testing systems, remote fiber test systems
in telecommunications, and research and development.
Figure 1: SCG Switch
The SCG switch connects a selected input to a selected output channel. The terminations are
precisely aligned using a processor-controlled stepper motor. Collimating lenses terminate the
fiberoptic attachments, minimizing the insertion loss of the switch and improving the
repeatability and stability of its parameters.
The SCG switch is equipped with an IEEE2488.1 parallel interface and an RS232C serial
interface for remote control operation. The switch is operated manually using the front-panel
controls.
The SCG switch is available in multiple-common (SCG-D, SCG-E, and SCG-F) configurations.
The multiple-common units support many grouped fiberoptic input channels.
2IEEE is a registered trademark of the Institute of Electrical and Electronics Engineers. Inc.
General Information and Specifications – 6

Multiple-Common (SCG-D) Switch Configuration
The multiple-common (SCG-D) switch configuration provides simultaneous connection of a
bank of inputs to outputs (Figure 2). Input 1 can be connected to 1-1 or any 1-M/N output. In this
configuration, channel connections are stepped by groups. The number of states is equal to the
number of output channels divided by the number of input channels.
2-1
2-2
2-3
.
M-M/N
.
.
M-2
1-2
1-3
1-M/N
.
.
1-1
M-1
M-3
.
.
2-M/N
1
2
M
3
4
5
.
.
Figure 2: Multiple-Common Configuration for MxN Channels
Single-Step Multiple-Common (SCG-E) Switch Configuration
The non-blocking single-step multiple-common (SCG-E) configuration allows any input to be
connected to any output. At the same time, adjacent inputs align with adjacent outputs (Figure
3). This configuration allows for single-step movement of any input channel to any output
channel.
1
N
1
2
3
M
R
R
R
R
R
.
.
2
3
4
5
6
7
8
.
.
.
.
.
.
.
4
Figure 3: Single-Step Multiple-Common Configuration for MxN Channels
General Information and Specifications – 7