Tempo Communications 930XC-20C User manual

930XC-20C • 930XC-20M
930XC-30F • 930XC-30P
Handheld OTDRs
52079877 REV 1 © 2020 Tempo Communications Inc. 01/20
INSTRUCTION MANUAL
Read and understand all of the instructions
and safety information in this manual
before operating or servicing this tool.
Register this product at www.TempoCom.com

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
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Table of Contents
Preface 5
Description.............................................................................................................................. 5
Safety ..................................................................................................................................... 5
Purpose of This Manual ........................................................................................................... 5
Warranty.................................................................................................................................. 5
Important Safety Information 6
Section 1. Introduction 9
Section 2. Basic Operation 10
Instrument Interface Description ............................................................................................ 10
Use of Batteries..................................................................................................................... 10
Auto Off Mode.................................................................................................................... 10
Recharging......................................................................................................................... 10
Keypad Functions .................................................................................................................. 11
Section 3. Basic OTDR Information 12
Principle of OTDRs................................................................................................................. 12
Basic Denition and Classication of Events ........................................................................... 12
Reection Events................................................................................................................ 12
Non-reection Events.......................................................................................................... 12
Inspection of Events ........................................................................................................... 12
Measurement Application....................................................................................................... 13
Measurement Contents....................................................................................................... 13
Trace Analysis.................................................................................................................... 13
Trace Display Screen.............................................................................................................. 13
Trace Display Window......................................................................................................... 13
Information Window ........................................................................................................... 14
Measurement Trace Parameters....................................................................................... 14
Events List...................................................................................................................... 14
Marker A/B Information................................................................................................... 15
Fiber Information ............................................................................................................ 15
Menu Bar and Icons............................................................................................................ 16
Parameter Conguration ..................................................................................................... 16
Denitions of Measurement Parameters........................................................................... 17
Range Conguration........................................................................................................ 17
Pulse Width Conguration................................................................................................ 18
Average Time Conguration............................................................................................. 18
Wavelength Conguration................................................................................................ 18
Measurement Mode Conguration ................................................................................... 19
Power Meter, Laser Source, and VFL Conguration............................................................ 19
Length Units ................................................................................................................... 20
Index of Refraction (IOR) Conguration ............................................................................ 20
Scatter Coefcient Conguration ..................................................................................... 20
Non-reection Threshold Conguration ............................................................................ 21
Reection Threshold Conguration................................................................................... 21
End Threshold Conguration............................................................................................ 22

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
Delete File....................................................................................................................... 22
Format Memory............................................................................................................... 23
Time Conguration.......................................................................................................... 23
Auto Off Conguration..................................................................................................... 23
Language Conguration................................................................................................... 24
Contrast Adjustment of LCD ............................................................................................ 24
Color Mode Setting.......................................................................................................... 24
Default Setting ................................................................................................................ 25
Help ............................................................................................................................... 25
Battery Recharge Status......................................................................................................... 26
Section 4. Trace Measurement and Processing of Existing Traces 27
Graphical User Interface (GUI) Instructions ............................................................................. 27
Trace Measurement ............................................................................................................... 27
Setup ................................................................................................................................. 28
Auto Trace Measurement .................................................................................................... 28
Manual Trace Measurement ................................................................................................ 29
Live Trafc Warning............................................................................................................ 29
Reasons for Trace Measurement Failures ............................................................................ 29
Information Window............................................................................................................... 29
Switching between Information Window Items ..................................................................... 29
Reviewing Events List ......................................................................................................... 29
Reviewing Marker A/B Information ...................................................................................... 29
Switching between Marker A/B ........................................................................................ 29
Information between Marker A/B ..................................................................................... 30
Zoom a Trace......................................................................................................................... 30
Zoom out Trace Horizontally ............................................................................................... 30
Zoom in Trace Horizontally.................................................................................................. 30
Zoom out Trace Vertically ................................................................................................... 30
Zoom in Trace Vertically ..................................................................................................... 30
Zooming Shortcuts ............................................................................................................. 30
Re-analyze a Trace ................................................................................................................. 30
Save a Trace.......................................................................................................................... 30
Browse Saved Traces ............................................................................................................. 31
Alter Measurements in Realtime Testing ................................................................................. 31
Power Meter, Laser Source, and VFL Settings .......................................................................... 32
Optical Power Meter Settings.............................................................................................. 32
Zeroing the Optical Power Meter ......................................................................................... 32
Stabilized Laser Source Settings ......................................................................................... 33
Visible Fault Locator Settings.............................................................................................. 33
Link Viewer............................................................................................................................ 34
Display Mode ..................................................................................................................... 34
Events Summary................................................................................................................. 35
Pass/Fail Setup.................................................................................................................. 35
Pass/Fail Settings .............................................................................................................. 36
Macrobend Analysis............................................................................................................... 36
Section 5. Calibration and Maintenance 38
Calibration Requirements ....................................................................................................... 38
Maintenance and Replacement of Batteries............................................................................. 38
Cleaning................................................................................................................................ 39

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Before Cleaning.................................................................................................................. 39
Cleaning Interfaces and Connectors .................................................................................... 39
Tools for Cleaning Interfaces and Connectors...................................................................... 39
Prrocedure for Cleaning Interfaces and Connectors.............................................................. 39
Section 6. Specications 40
Stabilized Laser Source Module .......................................................................................... 41
Optical Power Meter Module ............................................................................................... 41
Section 7. Calibration and Maintenance 42
Software Installation.............................................................................................................. 42
Computer System Requirements ......................................................................................... 42
Installation......................................................................................................................... 42
Software GUI ......................................................................................................................... 42
Graphical User Interface (GUI)............................................................................................. 42
Menu, Tool Bar, and Status Bar ............................................................................................ 42
File (F)............................................................................................................................ 43
Edit (E) ........................................................................................................................... 43
View (V).......................................................................................................................... 43
OTDR (O) ........................................................................................................................ 44
Window (W) .................................................................................................................... 45
Help (H).......................................................................................................................... 45
Information Subwindows .................................................................................................... 46
Trace Display Window ..................................................................................................... 46
Events List Window ......................................................................................................... 46
Parameter Window.......................................................................................................... 47
Fiber Section Information Window.................................................................................... 47
Fiber Chain Information Window ...................................................................................... 47
Software Functions................................................................................................................ 48
Upload Trace Data .............................................................................................................. 48
Option 1: ........................................................................................................................ 48
Option 2: ........................................................................................................................ 48
Browse Traces.................................................................................................................... 49
Tool Bar.......................................................................................................................... 49
Open Trace File ............................................................................................................... 50
Zoom in and out of Trace................................................................................................. 50
Review Trace Information ................................................................................................ 50
Save Trace ......................................................................................................................... 52
ASCII Format Output........................................................................................................... 52
Edit Optical Fiber Information.............................................................................................. 52
Revise Events List............................................................................................................... 53
Add Event ....................................................................................................................... 53
Revise Event ................................................................................................................... 53
Delete Event.................................................................................................................... 53
Printing.............................................................................................................................. 54
Printing Options .............................................................................................................. 54
Printing Setup ................................................................................................................. 54
Printing Preview.............................................................................................................. 55
Printing........................................................................................................................... 56
Batch Edit ....................................................................................................................... 56
Batch Print...................................................................................................................... 56
Batch Print Preview ......................................................................................................... 57
Exit Software .................................................................................................................. 58

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
5
Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
Preface
Description
The Tempo Communications berTOOLS™ 930XC instruments are handheld Optical Time Domain Reectometers (OTDRs) for
measuring the specications of single-mode or multi-mode optical ber.
• The 930XC-20C measures optical ber at 1310 nm and 1550 nm.
• The 930XC-20M measures optical ber at 850 nm and 1300 nm.
• The 930XC-30F measures optical ber at 1310 nm, 1550 nm, and 1625 nm.
• The 930XC-30P measures optical ber at 1310 nm, 1490 nm, and 1550 nm.
Included with the 930XC instruments are the following:
• USB and serial data transfer cables
• Power adapter
• Vehicle adapter power cord
• Trace Viewer software installation disk
• Instruction manual
• Soft carrying case
Safety
Safety is essential in the use and maintenance of Tempo Communications tools and equipment.
This instruction manual and any markings on the tool provide information for avoiding hazards and unsafe practices related to
the use of this tool. Observe all of the safety information provided.
Purpose of This Manual
This instruction manual is intended to familiarize all personnel with the safe operation and maintenance procedures for the
Tempo Communications 930XC handheld OTDRs.
Keep this manual available to all personnel. Replacement manuals are available upon request at no charge.
Warranty
Tempo Communications Inc. warrants to the original purchaser of these goods for use that these products will be free from
defects in workmanship and material for one year. This warranty is subject to the same terms and conditions contained in
Tempo Communication’s standard one-year limited warranty.
For all Test Instrument repairs, contact Customer Service at 800-642-2155 to request a Return Authorization.
For items not covered under warranty (such as items dropped, abused, etc.), a repair cost quote is available upon request.
Note: Prior to returning any test instrument, please check replaceable batteries or make sure the battery is at full charge.
All specications are nominal and may change as design improvements occur.

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Important Safety Information
SAFETY
ALERT
SYMBOL
This symbol is used to call your attention to hazards or unsafe practices which could result in an
injury or property damage. The signal word, dened below, indicates the severity of the hazard.
The message after the signal word provides information for preventing or avoiding the hazard.
Immediate hazards which, if not avoided, WILL result in severe injury or death.
Hazards which, if not avoided, COULD result in severe injury or death.
Hazards or unsafe practices which, if not avoided, MAY result in injury or property damage.
Read and understand all of the instructions and safety information in this
manual before operating or servicing this tool.
Failure to observe this warning could result in severe injury or death.
Electric shock hazard:
• Do not operate in an explosive atmosphere such as in the presence of ammable gases or
fumes.
• Before applying power, verify that the unit is set to match the available line voltage.
Failure to observe these warnings could result in severe injury or death.

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
Important Safety Information (cont’d)
Electric shock hazard:
• Fuse replacement should be performed by Tempo qualied personnel.
• Do not use repaired fuses or short-circuited fuse holders.
Failure to observe these warnings could result in severe injury or death.
The 930XC instruments are laser devices
conforming to the requirements of CDRH,
CFR 1040, Subchapter J. While there is no
potential for eye damage due to unaided
direct exposure, users should always avoid
looking directly into the output port. The
use of optical viewing instruments, such
as microscopes, magniers, etc., should
always be avoided. The use of such devices
around active bers can focus an intense
beam of light energy onto the retina of
the eye, which can result in permanent
damage.
Laser hazard:
• When performing measurements on ber optic systems, avoid eye exposure to any open-
ended bers, optical connectors, optical interfaces, or other sources because they may be
connected to active laser transmitters.
• Do not look into the optical port when a source is turned on.
• Avoid looking at the free end of a test ber, i.e., the end not connected to the instrument. If
possible, direct the free end toward a non-reective surface.
Failure to observe these precautions may result in injury.
LASER LIGHT
DO NOT STARE INTO BEAM
CLASS 1 LASER PRODUCT

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
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Important Safety Information (cont’d)
Electric shock hazard:
• Do not expose batteries to re or intense heat. Do not open or mutilate batteries. Avoid
touching the electrolyte in the batteries, which is corrosive and may cause damage to eyes or
skin.
• Do not open the case of the unit for any reason. It contains no user-serviceable parts.
• Use this unit for the manufacturer’s intended purpose only, as described in this manual. Any
other use can impair the protection provided by the unit.
Failure to observe these precautions may result in injury and may damage the unit.
Instrument damage hazard:
• Make sure that the optical ber or cable is not in use and there is no laser beam in the ber
before testing with this unit.
• Do not leave the unit in direct sunlight or near direct sources of heat.
• Protect the unit from strong impacts or shock.
• Do not immerse the unit in water or store in areas with high humidity.
• When necessary, clean the case, front panel, and rubber cover with a damp cloth. Do not use
abrasives, harsh chemicals, or solvents.
• Replace the protective dust cap when the unit is not in use.
• Store the unit and interface adapters in a cool, dry, and clean place.
Failure to observe these precautions may result in injury and may damage the unit.
Electric shock hazard:
• Do not expose the unit to extremes in temperature or high humidity. Refer to “Specications.”
• Turn the unit off, disconnect from power, and make sure the laser source is off before
cleaning.
Failure to observe these precautions may result in injury and may damage the unit.

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
Section 1. Introduction
Tempo’s 930XC handheld OTDRs can make an assessment of one single optical ber or a whole optical ber chain. In addition,
the user can directly observe loss and events distribution of an optical ber chain.
The 930XC tools check the transmission quality of optical ber through the measurement of backscatter. Standard
organizations like the International Telecom Union (ITU) dene backscatter as an effective analysis means to measure optical
ber loss. Backscattering is also the only effective way of connector inspection, which can be applied to measure the length of
optical ber.
The 930XC OTDRs operate by reviewing events in optical ber (for example, irregularities and connectors). These tools can
help identify irregularities in optical ber, locate them, and measure their attenuation, relevant loss, and homogeneity.
These tools are easy-to-use, small, and compact with large LCD displays and graphical interfaces. They can save and transfer
the measurement curves data to a PC by using the provided Trace Viewer software for further analyzing, reporting, and
printing.
Basic applications:
• Measure the length of optical ber and cable.
• Measure the distance between two points on optical ber and cable.
• Locate faults and ruptures of optical ber and cable.
• Display distribution curve of optical ber and cable loss.
• Measure attenuation coefcient of optical ber and cable.
• Measure loss between two points on optical ber and cable.
• Measure loss of tie-ins.
• Measure reection of reection events of optical ber and cable.
• The 930XC-30F can measure live optical bers at 1625 nm.
For a specic event (transmission quality changed due to faults caused by fusion splicing, connector, bending, etc.), the
following measurements can be carried out:
• For each event: Distance, loss, and reection.
• For each section of optical ber: Length and loss of dB or dB/unit length.
• For the whole optical ber chain: Length and loss of dB.
Additional features:
• Large LCD display with auto or manual adjustment of contrast.
• Backlight LCD display supports night operation.
• Easy operation with trace graphic display.
• Trace storage function.
• RS-232 and USB data upload ports.
• Trace Viewer software for analyzing and reporting previously stored data.
• Auto off function to conserve battery life.
• DC/AC power supply.
• Macrobend analysis.
• Link Viewer for automated Pass/Fail analysis.

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
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Section 2. Basic Operation
This section describes the basic operation of the 930XC instruments. Specic operations are explained in detail in Section 3 of
this manual.
Instrument Interface Description
1. Charge Indicator: When lit, measurement power is charging.
2. Power Indicator: When lit, measurement power is on.
3. AC Power Jack: Power adapter jack requirements are 13.8 VDC at 1.2 A.
4. Data Transfer Ports: USB and RS-232 interfaces to transfer saved traces in the instrument to a PC for further analysis
with Trace Viewer software (provided).
5. Fiber Optic Output for OTDR or 1625 nm live ber, and VFL (visual fault locator): Connector is used for
the OTDR interface.
6. Invisible Laser Caution: Do not look directly at the optical output or stare at the laser beam.
7. OPM Optical Power Meter
Use of Batteries
The 930XC tools use a NiMH battery.
Auto Off Mode
• The instrument will enter auto off mode when there is insufcient power during operation. The low power icon will be
displayed on the LCD.
• If unused for a long time, causing insufcient power, the instrument will enter auto off mode several seconds after
powering on in order to protect the batteries in case of excessive discharging. The internal battery should be recharged
immediately through the adapter.
Recharging
• Perform a quick charge rst, and then switch to trickle charge after the voltage reaches a predened gure. Quick charge
temperature is 5 °C to 45 °C (41 °F to 113 °F), and trickle charge temperature is 0 °F to 55 °C (32 °F to 131 °F). Battery
will not be fully charged or may be damaged if the charging temperature is beyond the above range, which may shorten
battery life.
• A quick charge takes 3 hours.
11
930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P Instruction Manual
Section 2. Basic Operation
This section describes the basic operation of the 930XC instruments. Specic operations are
explained in detail in Section 3 of this manual.
Instrument Interface Description
17
6
6
53 2
5 54
RS-232
OTDR
OPM VFL
OTDR Live
USB
Figure 2-1. Interface Panel
1. Charge Indicator: When lit, measurement power is charging.
2. Power Indicator: When lit, measurement power is on.
3. AC Power Jack: Power adapter jack requirements are 13.8 VDC at 1.2 A.
4. Data Transfer Ports: USB and RS-232 interfaces to transfer saved traces in the instrument to
a PC for further analysis with Trace Viewer software (provided).
5. FiberOpticOutputforOTDRor1625nmliveber,andVFL(visualfaultlocator):
Connector is used for the OTDR interface.
6. InvisibleLaserCaution:Do not look directly at the optical output or stare at the laser beam.
7. OPM Optical Power Meter

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
Keypad Functions
1. On/Off: Press to turn power on or off to the instrument.
2. Run/Stop:
• Under GUI, press to start measurement.
• While testing, press to stop measurement.
3. Enter:
• Under GUI, press to conrm the current operation.
• Use with the Shift key to zoom out trace vertically.
4. pq (up and down) arrows:
• Move menu bar in menu operation.
• Highlight the icon to be selected.
• Adjust parameter in parameter conguration.
• Use q with the Shift key to browse up the events list.
• Use p with the Shift key to zoom in trace vertically.
5. tu (left and right) arrows:
• Select parameter to be adjusted in parameter conguration.
• Move marker left or right in trace operation.
• Turn pa ge while in Help submenu.
• Use with the Shift key to zoom out or zoom in trace horizontally.
6. arrow:
• Read Help menu when power on.
• Cancel the current operation.
• Exit menu conguration.
• Switch between information windows.
• Use with the Shift key to browse down the events list.
7. Shift:
• Under GUI, press to return a trace to original size without any zoom.
• Activate the integration function by pressing this key together with other keys.
2
5
6
1
5
7
4
3
4
Figure 2-2. 930XC Keypad

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
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Section 3. Basic OTDR Information
Principle of OTDRs
An OTDR (Optical Time Domain Reectometer) is a measurement instrument for identifying optical ber transmission features.
The OTDR is used to measure the overall attenuation of a ber optic link and to provide details relating to the position of
each event in that link. Events include splices, connectors, bends, and optical components. Its non-destructive, single-
ended connection and rapid measurement have made the OTDR an indispensable tool for manufacturing, construction, and
maintenance of optical ber links.
The faults and heterogeneity of optical ber itself cause Rayleigh scattering of light transmitted in optical ber. Part of the light
pulse is scattered in the reverse direction, and this is called Rayleigh backscattering, which actually provides attenuation details
relating to ber length.
Information relating to distance is obtained through time information (thus “time domain” in the name OTDR). Fresnel reection
occurs at the boundary between two media of different IOR (for example, connections of faults, connectors, or optical ber end).
This reection is used to locate the discontinuous points on optical ber. The magnitude of reection depends on the difference
between IOR and the smoothness of boundary.
An OTDR sends out a light pulse into the optical ber and receives reections of events and backscattering power of the pulse in
time. Locations will be displayed on the LCD. The y-axis is the dB value of backscattering power, and the x-axis is the distance.
Basic Denition and Classication of Events
Events refer to any abnormal points causing attenuation or sudden change of scattering power besides the normal scattering of
optical ber, which include losses such as bending, connections, and ruptures.
Event points displayed on the LCD are abnormal points that cause traces to deviate from a straight line.
Events can be classied as reection events or non-reection events.
Reection Events
When some pulse energy is scattered, reection events occur. When reection events occur, a peak is displayed on the trace
(Figure 3-1).
Non-reection Events
Figure 3-2. Non reection Event
Figure 3-1. Reection Event

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
When some pulse energy is scattered, reection events occur. When reection events occur, a peak is displayed on the trace
(Figure 3-1).
Measurement Application
The 930XC instruments display power relating to the distance of returning signals. This information can be used to identify the
main properties of an optical ber chain.
Measurement Contents
• Event location (distance), end, or rupture of optical ber chain.
• Attenuation coefcient of ber.
• Loss of a single event (for example, one optic tie-in), or total loss from upper end to end.
• Range of a single event like reection of connectors (or grade of reection).
• Auto measurement of cumulative loss of a single event.
Trace Analysis
The trace analysis of the 930XC OTDR is fully automatic. The trace locates:
• Reection events of connections and mechanical tie-ins.
• Non-reection events.
• End of optical ber.
• Through scanning the rst loss event that is larger than the end threshold, identies the end of optical ber.
• Events list: Event type, loss, reection, and distance.
Trace Display Screen
The trace displays on the 930XC screen (Figure 3-3).
Trace Display Window
This window displays the trace after one measurement.
Denition of trace: After one measurement, the reection power diagram will be displayed as a distance function. This diagram
is referred to as trace.
Figure 3-3. Trace Display Screen
Figure 3-4. Traces and Coordinates

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The trace of the 930XC displays measurement results in a graphic form. The y-axis represents the power while the x-axis
represents the distance (Figure 3-4).
Information Window
The contents of this window are measurement parameters, events list, marker A/B, and analysis parameters.
Measurement Trace Parameters
Important measurement and analysis parameters are displayed in the information window (Figures 3-5a and 3-5b).
For denitions and congurations of items in Figure 3-5a (average time, sample distance, range, IOR, wavelength, and pulse
width) as well as denitions of items in Figure 3-5b (date, reection threshold, non-reection threshold, end threshold, and
scattering coefcient), refer to “Parameter Conguration” in this section of the manual.
Events List
The events list indicates the location of events inspected. Any dened posts will be displayed in the events list (for example, a
non-reection event such as a fusion splice or a reection event such as a connector) (Figure 3-6).
• No.: Event sequence number.
• Four types of events: begin end; reection event; ber end; attentuation event.
• Location: Distance from beginning point to event.
• Re.: Magnitude of reection.
• Ins.L.: Loss of inserted event.
Figure 3-5b. Analysis Trace ParametersFigure 3-5a. Measurement Trace Parameters
Figure 3-6. Events List

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Tempo Communications Inc. 1390 Aspen Way • Vista, CA 92081 USA • 800-642-2155
• Attn.: Attenuation characteristic from one event point to the current event.
• Cum.L.: Cumulative loss, calculating from beginning point to the current event.
Marker A/B Information
A marker is used to mark and analyze a single event, trace section, and distance. Distance, attenuation, and loss at a marker or
between markers will be displayed in marker information (Figure 3-7).
The following parameters are measured between marker A and B. Changing either marker will change the record accordingly.
• A-B: Distance between two markers.
• 2Pt. Loss: Loss between two markers; power difference between two markers.
• 2Pt. Atten: 2 points loss of unit length.
The specic operations of the above items are explained in more detail later in this manual.
Figure 3-8. Fiber Information
Figure 3-7. Marker A/B Information

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Fiber Information
Fiber information includes total attenuation, length, and loss of the tested ber (Figure 3-8).
Menu Bar and Icons
Notes:
• Under the Help menu, only numbers 1 and 3 are operational.
• In the process of measurement, all functions on the menu bar will be disabled.
• Numbers 3, 4, 5, 6, 7, 8, and 9 are tools for trace analysis. Numbers 10 and 11 are tools for reviewing events list.
• Number 1 is explained in the next section, “Parameter Conguration.”
Parameter Conguration
Correct parameter conguration is necessary for accurate measurements.
Use pand qto highlight (i.e., parameter conguration on the menu bar), and then press Enter (Figure 3-9).
Press to exit.
Figure 3-9. Parameter Conguration
1
2
3
4Re-analyze the trace
5Zoom out trace horizontally
6Zoom in trace horizontally
7Zoom out trace vertically
8 Zoom in trace vertically
9Switch between markers
10 Review events list upward
11 Review events list downward
12 Battery power indicator
Open file
Save file
Parameter configuration
No. Icons Description

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Denitions of Measurement Parameters
Range Conguration
Generally, the range is set according to the actual length of optical ber in order to insure the accuracy of the measurement.
Under the parameter conguration menu use pand q to highlight “Range.” Press Enter to select a range (Figure 3-10).
Press to exit.
Use pand q to select an adequate range. Press Enter to conrm.
Notes:
• “Auto” means automatic measurement. When this function is selected, the instrument automatically selects an adequate
range and pulse width for the measurement. The process of measurement does not require any intervention by the user.
• “Auto” is the default setting.
Figure 3-9. Range Conguration
Range
Pulse Width
Average Time Select suitable testing time
Wavelength Select laser wavelength for measurement
Measurement Mode Select mode for measurement
PM/LS
Length Units
Optical power meter, stabilized laser source, and VFL
Select units of measurement
IOR
Threshold
Events whose insertion loss is ≥ the threshold displayed here
End Threshold First event with insertion loss ≥ the threshold is considered the end of
Delete File Delete stored trace data in the instrument
Time Show current system time
Auto Off Enable or disable auto off function
Lang./ Choose language
LCD Contrast Adjust contrast of LCD
Color Mode Select suitable color setting for display
Load Default Set all parameters to factory setting
Help

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Pulse Width Conguration
The selection of pulse width affects the dynamic range and resolution of the measurement. With a narrow pulse width there will
be higher resolution and smaller deadzone; however, the dynamic range will be decreased. A wide pulse width will bring higher
dynamic range and measure comparatively longer distance, but resolution and deadzone will be increased. Therefore, users
should make the choice between dynamic range and deadzone.
The options for pulse width will change according to the distance range selected.
Under the parameter conguration menu use pand q to highlight “PulseWidth.” Press Enter to select a value (Figure 3-11).
Press to exit.
Use pand q to highlight the pulse width. Press Enter to conrm.
Notes:
• “Auto” is the default setting.
• When the range is set to “Auto,” the pulse width automatically is set to “Auto.”
Average Time Conguration
Average time will affect the SNR directly. The longer the average time is, the higher SNR is, as well as dynamic range. Therefore,
when measuring long-distance optical ber, a long average time should be selected in order to review events at the long-
distance end.
Under the parameter conguration menu use pand q to highlight “Avg. Time.” Press Enter to conrm (Figure 3-12).
Press to exit.
Use pand q to highlight the pulse width. Press Enter to conrm.
Notes:
• There are ve levels of predened average time: 15 s, 30 s, 1 min, 2 min, and 3 min.
• The default setting is “30 s.”
Wavelength Conguration
Under the parameter conguration menu use pand q to highlight “Wavelength.” Press Enter to change the
wavelength (Figure 3-13).
Figure 3-11. Pulse Width Conguration
Figure 3-12. Average Time Conguration

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Measurement Mode Conguration
There are two kinds of measurement mode: averaging and realtime. Under realtime mode the 930XC will undertake realtime
measurement for the connector of exterior ber and refurbish the measured trace. While under realtime mode, press Run/Stop
to stop; otherwise it will measure continuously. Under Averaging mode the tool will average the data within the measure time,
which is set by the user. When exceeding the set time, it will stop automatically and display the result. In general, averaging is
the preferred mode.
Under the parameter conguration menu use pand q to highlight “Meas. Mode.” Press Enter to select “Averaging” or
“Realtime” mode (Figure 3-14). Press to exit.
Power Meter, Laser Source, and VFL Conguration
Under the parameter conguration use pand q to highlight “PM/LS” and press Enter to enter PM/LS interface (Figure 3-15).
Refer to “Power Meter, Laser Source, and VFL Settings” in Section 4 for details.
Figure 3-13. Wavelength Conguration
Figure 3-14. Measurement Mode Conguration
Figure 3-15. Power Meter and Laser Source Conguration

930XC-20C • 930XC-20M • 930XC-30F • 930XC-30P
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Length Units
Under the parameter conguration menu use pand q to highlight “Length Units.” Press Enter to select the desired units of
measurement (Figure 3-16). Press to exit.
Index of Refraction (IOR) Conguration
Because IOR is a key factor affecting the speed of laser transmission in optical ber, the IOR conguration has a direct impact
on the accuracy of measurement. In general, the IOR parameter is provided by the optical ber manufacturer, and it can be set to
the accuracy of four digits after the decimal point between 1.0 and 2.0.
Under the parameter conguration menu use pand q to highlight “IOR.” Press Enter to enter a value (Figure 3-17).
Press to exit.
Use tand u to adjust the position of the highlighted area. Use pand q to change the digits. After setting, press Enter to
conrm.
Scatter Coefcient Conguration
Scatter coefcient determines the value of backscatter power. This conguration affects the calculation of reection value.
Under the parameter conguration menu use pand q to highlight “Scat. Coef.” Press Enter to enter a value (Figure 3-18).
Figure 3-16. Length Units
Figure 3-17. IOR Conguration
Figure 3-17. IOR Conguration