Tekron IRIG-B User manual

IRIG-B ANALYZER
USER MANUAL
Second Edition Copyright ©2016

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© 2016 by Tekron International Limited. All Rights Reserved. All trademarks are the property of their respective holders. The
information in this document is provided for informational use only and is subject to change. For further information or support, go to
www.tekron.com.
Contents
1INTRODUCTION.................................................................................................................................................................................3
2IRIG-B ANALYZER KIT: CONTENTS......................................................................................................................................4
3FITTING BATTERIES.......................................................................................................................................................................5
4IRIG-B ANALYZER KEYPAD AND SCREEN......................................................................................................................6
5POWERING ON THE IRIG-B ANALYZER.............................................................................................................................7
6HOME SCREEN...................................................................................................................................................................................7
7MEASURING COPPER IRIG-B SIGNALS..............................................................................................................................7
8MEASURING FIBER IRIG-B SIGNALS....................................................................................................................................9
SC Fiber Cable..........................................................................................................................................................................................................9
ST FIBER CABLE...................................................................................................................................................................................................10
Signal Details Screen...........................................................................................................................................................................................11
9MENU OPTIONS...............................................................................................................................................................................12
10 HELP SCREEN...................................................................................................................................................................................13
11 TROUBLESHOOTING GUIDE...................................................................................................................................................16
12 CLEANING THE IRIG-B ANALYZER....................................................................................................................................17
13 NOTES....................................................................................................................................................................................................17
14 WARNING.............................................................................................................................................................................................17
15 DOCUMENT REVISION HISTORY.........................................................................................................................................18
16 APPENDIX............................................................................................................................................................................................19
IRIG-B signal properties....................................................................................................................................................................................19
17 SPECIFICATIONS............................................................................................................................................................................23
18 WARRANTY........................................................................................................................................................................................25

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© 2016 by Tekron International Limited. All Rights Reserved. All trademarks are the property of their respective holders. The
information in this document is provided for informational use only and is subject to change. For further information or support, go to
www.tekron.com.
1INTRODUCTION
The IRIG-B Analyzer helps you decode and validate your IRIG-B timing signals, automatically handles
optical or multilevel copper signal inputs and is battery powered with an easy to read backlit LCD
display, ideal for use in areas with poor lighting.
It comes complete with all components required for IRIG-B measurement including an optical
converter, a BNC-Tee and test leads to measure copper-based IRIG-B signals.

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information in this document is provided for informational use only and is subject to change. For further information or support, go to
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2IRIG-B ANALYZER KIT: CONTENTS
The IRIG-B Analyzer kit consists of the following items:
Rubber Protective Cover
Test Leads
Figure 1: IRIG-B Analyzer fitted with rubber
cover
Figure 2: Supplied leads
ST to SC Fiber Adaptor
BNC Tee Adaptor
Figure 3: ST to SC Fiber Adaptor
Figure 4: BNC Adaptor
Carry Case
Figure 5: Carry Case

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information in this document is provided for informational use only and is subject to change. For further information or support, go to
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3FITTING BATTERIES
The IRIG-B Analyzer is powered from two AA batteries (not included). To fit these batteries, follow
the steps below:
1. Remove the protective rubber cover by pulling the rubber cover off both bottom corners of
the analyzer first (as per Figure 6).
Figure 6: Removing the rubber cover
2. Slide the battery housing cover off the underside of the Analyzer.
3. Fit two fresh AA batteries ensuring the polarity of each is as shown in Figure 7 below.
4. Re fit the battery cover.
5. Re fit the protective rubber cover starting by fitting the cover top first then stretch the
bottom over the analyzer.
Figure 7: Two AA batteriescorrectly fitted

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4IRIG-B ANALYZER KEYPAD AND SCREEN
The IRIG-B Analyzer has 6 buttons with the functionality indicated below:
The IRIG-B Analyzer has the following general screen layout:
Screen Title Battery State Indicator
Current Cursor position Empty Full
Screen information
Function of the F1 key Function of the F2-key
(Blank means F1 not active) (Blank means F2 not active)
Shows the Up and Down keys for scrolling
Key
Name
Function
F1
The function of this button is dependent
on the mode of the Analyzer. The current
function is displayed just above the F1
button.
F2
The function of this button is dependent
on the mode of the Analyzer. The current
function is displayed just above the F2
button.
Up
This key is used to scroll the screen in the
upwards direction.
Down
This key is used to scroll the screen in the
downwards direction
Power
This key is used to turn the IRIG-B
Analyzer on or off. When turning the unit
off, hold down for 3 seconds.
Note: The unit will automatically switch
off after 6 minutes of inactivity.
Backlight
Pressing this key toggles the LCD back
light on and off.

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5POWERING ON THE IRIG-B ANALYZER
Pressing the Power button will turn the IRIG-B Analyzer on. During start up, an initialization
screen with the Serial Number will be shown for a short time. Refer to Figure 8
Figure 8: Startup Screen
Once initialized, the IRIG-B Analyzer will display theHome screen as below in Figure 9
6HOME SCREEN
Whilst in this state the unit will start searching for both fiber and copper IRIG-B inputs. Whilst
searching for a valid input signal, the analyzer will transition between different status screens
(Figure 9).
Figure 9: Sample of the displayed screens when searching for an IRIG-B signal
7MEASURING COPPER IRIG-B SIGNALS
Warning: The IRIG-B signals to be measured can be at a voltage level that presents a shock
hazard. Care should be taken when doing these measurements to avoid touching any
exposed terminals.
If the IRIG-B signal being measured exceeds 48V (AC or DC), then a High Voltage symbol will be
displayed at the top of the screen as in Figure 10 below.

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Figure 10: High Voltage warning display
1. To measure electrical IRIG-B signals connect the two test leads to the IRIG-B Analyzer as
shown in Figure 11. Ensuring that the red plug is inserted into the red socket, and the black
plug is inserted into the black socket.
Figure 11: Test leads connected ready to read copper IRIG-B signals
2. Hold the probes to the exposed IRIG-B cabling test point ensuring the red lead is connected
to the positive and black to the negative side of the IRIG-B signal.
3. The IRIG-B analyzer will detect if an IRIG-B signal is present and display the screen in
Figure 12 for 1 second.
Figure 12: Signal detection screen
4. The IRIG-B Analyzer will display the signal properties as shown in Figure 13, the arrow keys
can be used to navigate through the listed details.

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Figure 13: Typical Detail Screen
Note: A full description of the signal properties displayed on the details screen can be seen in the
Appendix.
When viewing the Details screen you can press F2 to return to the HOME screen to re-test the
IRIG-B signal.
8MEASURING FIBER IRIG-B SIGNALS
SC Fiber Cable
1. Remove the protective plug from top of IRIG-B analyzer to expose the SC fiber socket as per
Figure 14 below.
Figure 14: SC Fiber socket with protective plug removed
2. Connect the IRIG-B SC fiber cable to the IRIG-B Analyzer ensuring the tab on the fiber plug
matches the notch in the fiber socket as shown below in Figure 15 below.

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Figure 15: Correct orientation of fiber plug
ST Fiber Cable
1. If the fiber cable is a ST type cable, plug the SC to ST adaptor into the analyzer as below
ensuring the fiber plug tab is oriented with the socket notch as described above.
2. Next plug the ST Cable into the adaptor making sure the ST plug tab aligns with the adaptor
notch as shown below before engaging the bayonet style locking mechanism.
Fiber plug tab aligned with fiber socket notch
Line up socket slot
with connector tab

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Signal Details Screen
1. The IRIG-B analyzer will detect if an IRIG-B signal is present and display the screen in
Figure 16 1 second.
Figure 16: Signal detected
2. The IRIG-B Analyzer will then display the signal properties as shown in Figure 17, the arrow
keys can be used to navigate through the listed details.
Figure 17: Fiber IRIG-G Signal details
Notes:
-A full description of the signal properties displayed on the details screen can be seen in
Appendix.Figure 18Figure 18: Transferring Data
3. When viewing the Details screen you can press F2 to re-
test the IRIG-B signal.
Warning: Important note!! Always replace the rubber protective plug after use to prevent the
optical receiver from being subjected to dust and other contaminants which could inhibit the
IRIG-B Analyzer from operating correctly in future.

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9MENU OPTIONS
The IRIG- F1 (Menu). To
navigate the menu, use the arrow keys to highlight the different options. F1 can be used to select
items and F2 can be used to navigate backwards or exit the menu. Refer to Figure 19
Figure 19: Main Menu
The menu contains the following fields:
Help
oProvides troubleshooting advice and instructions on performing a firmware upgrade.
See the Help Screen details (HELP SCREEN) for more information.
Figure 20: The help menu screen
Firmware Upgrade
oEntering this section will enable the unit to connect to the computer to start a
firmware upgrade via Wireless. Refer to the Upgrading the IRIG-B Analyzer
Firmware document available from http://tekron.com/power/irigb-analyzer for more
information.

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Figure 21: Bootloader Screen
About
oProvides company information, and a scrollable display showing the current firmware
version, serial number and hardware revision.
Figure 22: The About screen
10 HELP SCREEN
The IRIG-B Analyzer Help screen can be accessed from the Menu screen and gives a brief help on
the following topics.
Stuck On Home Help Screen
Figure 23: Stuck on Ready Help Screen

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This is where the IRIG-B Analyzer is not detecting a valid IRIG-B signal when on the Home screen.
Refer to the Troubleshooting section below for possible causes.
Year Not Present Help Screens
Figure 24: Year Not Present-Help Screens-1 & 2
This may be encountered when the IRIG-B signal is from a Clock conforming to earlier IRIG standards.

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UTC Offset Reversed
Figure 25: UTC Offset Reversed-Help Screens 1, 2 & 3
This may be encountered when the IRIG-B signal is from a Clock conforming to earlier IRIG standards
Firmware Upgrade
Figure 26: UTC Offset Reversed-Help Screens 1, 2 & 3
This is a brief help with upgrades of the Analyzer software in the field. For further information, refer
to the Upgrade Guide available from www.tekron.com.

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Polarity Inverted
Figure 27: Polarity Inverted- Help Screens 1, 2, 3 & 4
This help screen prompts the user to check the probes are connected to the IRIG-B signal with the
correct polarity and explains why RS-232 IRIG-B normally is reported as inverted. See the
Troubleshooting section below for more help on Inverted Polarity.
11 TROUBLESHOOTING GUIDE
1. No Signal Detected
a. Confirm the source of the IRIG-B signal is configured to output IRIG-B and that it is in
operation.
b. For copper IRIG-B, check the probes are making secure contact with the line. Some
pressure may be required to get good signal detection. The IRIG-B Analyzer is able to
measure IRIG-B signals down to 2V peak to peak.
c. For fiber IRIG-B, check the fiber connectors are properly inserted into the fiber socket
and ensure the fiber signal being measured is using the correct standard (i.e. 820nm λ
multi-mode fiber). Check the fiber patch cable being used supports 830nm λmulti-
mode signals.
2. Blank Screen when powered up
a. Check battery condition, replace with fresh batteries if needed. Check they are
installed in the IRIG-B Analyzer with the correct polarity.
b. If the problem persists, contact Tekron at: [email protected]
3. Measured IRIG-B Signal Reported as Inverted
The IRIG-B Analyzer is optimized to measure electrical IRIG-B signals where the IRIG-B logic 1
level is more positive than the logic low level, (for example in TTL levels Logic 1 is nominally
+5v and Logic 0 is 0v).
The RS-232 standard however has the logic levels reversed so that logic 1 is a negative voltage and a
logic 0 is a positive voltage. As a consequence, when measuring RS-232 signals with the IRIG-B
analyzer, it is normal that the polarity is reported as inverted.
RS-422 and RS-485 IRIG-B signals are balanced signals so when measuring these with the IRIG-B
analyzer care should be taken to measure the signal between the two signal wires and not from one

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or other with respect to ground. It is important to ensure the probes are oriented correctly still by
connecting the red probe to the non-inverted signal wire and the black probe to the inverted signal
wire.
4. Upgrades.
Refer to the Upgrade Guide available from http://tekron.com/power/irigb-analyzer support
at [email protected]
12 CLEANING THE IRIG-B ANALYZER
Smear marks on the keypad and LCD window can be cleaned by using a damp soft cloth and light
pressure. Do not use any other chemicals or immerse in liquid.
13 NOTES
The information in this manual may change without notice. The manufacturer assumes no
responsibility for any errors that may appear in this manual.
Copyright ©2016 Tekron International Ltd. All rights reserved. No part of the contents of this
document may be transmitted or reproduced in any form or by any meanswithout the written
permission of Tekron International Ltd. Published in New Zealand.
14 WARNING
This product has been designed to comply with the limits for a Class A digital device pursuant to
Part 15 of FCC rules. These limits are designed to provide reasonable protection against such
interference when operating in a commercial environment.

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15 DOCUMENT REVISION HISTORY
Version
Author
Compatible
with firmware
version
Date
Completed
Published
Date
Changes Made
1.0
R Brown &
A Lippitt
01.01
28 Aug 2015
15 Sept 2015
First revision of the
manual
2.0
R Brown
01.08
05 April 2016
4 April 2016
Product imagery
updated and some
sections have been
added

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16 APPENDIX
IRIG-B signal properties
Example
Properties
SIGNAL TYPE
Copper IRIG-B
Fiber IRIG-B
DC Level Shift
or
Fiber Manchester
Signal Type
○IRIG-B00x (DCLS)
○IRIG-B12x (AM)
○IRIG-B22x
Modified Manchester
○IRIG-B00x Fiber
Unmodulated
○IRIG-B22x
Fiber Manchester
IRIG 200-04
IEEE C37.118.1
Displays the standard the
IRIG-B signal conforms to
POLARITY
INVERTED
This field is displayed only
when the polarity of the
signal is reversed. Check
your tests leads are not
reversed. If measuring a RS-
232 IRIG-B signal it is normal
for the analyzer to report the
polarity as inverted
SIGNAL PROPERTIES
Amplitude 5.0V
Amplitude of the IRIG-B
signal
This value excludes any DC offset on the
IRIG-B signal and
This value represents the peak to peak
value of the IRIG-B signal and excludes any
DC offset. Not applicable to fiber.
Zero Avg 2.0ms
Average pulse width of a
logic zero data field
The IRIG-B signal carries 100 bits of data
every second by way of pulses. The logic
state of a particular field is determined by
the width of these pulses which are
nominally 2ms for a logic zero and 5ms for
a logic one.
One Avg 5.0ms
Average pulse width of a
logic one data field

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SIGNAL PROPERTIES
PosID Avg 8.0ms
Average width of Position ID
pulses.
The IRIG-B signal data is grouped into ten
frames every second with the start of each
frame identified by a Position ID marker
pulse. The last frame in the second
contains a second marker pulse
immediately preceding the start of the next
second. The Position ID pulses are
nominally 8ms.
Modulation Ratio
Ratio of a logic one to a logic
zero carrier level
Amplitude modulated IRIG-B signals signify
the logic state of the particular field by
varying the amplitude of a carrier signal.
The Modulation Ratio is a ratio of the peak
to peak values of a logic one and logic zero
signals, (nominally 3:1). Not applicable to
fiber. The logic one and zero signals are
displayed as High Amplitude and Low
Amplitude values respectively.
SIGNAL DATA TIME
16:13:52 17 AUG 15
or
16:13:52-Day of Year
265
Time decoded from the IRIG-B signal. 24 HR format HH:MM:SS
If IRIG-B Year information is present, the Date decoded from the IRIG-B
signal day month year in format HH:MM:SS-DD-MMM-YY
If IRIG-B Year information is not present, the date decoded from the IRIG_B.
signal does not contain the year and is in format HH:MM:SS-Day of Year
nnn. A warning is displayed if any of the date/time elements (day of year,
hour etc) are not valid.
SIGNAL EXTENSIONS
Local Offset + 12H
Should match the IRIG-B signal UTC offset including any Daylight Savings
offset
Daylight Saving Off
Indicates whether the Daylight Saving Flag is present in the IRIB-G signal
Time Quality
UTC Traceable
The Time Quality (TQ) is an
indicator of the time accuracy
of the IRIG-
The top line shows the TQ
indicator number and the line
TQ Quality
Meaning
0
Clock is locked to a UTC
traceable source
1
Time is within <1ns of UTC
2
Time is within < 10ns of UTC