Related Manuals for Arbiter Systems 940A
Summary of Contents for Arbiter Systems 940A
- Page 1 MODEL 940A TIMING SYSTEM ANALYZER USER’S MANUAL Arbiter Systems, Inc. Paso Robles, CA 93446 U.S.A. FONKEL MEXICANA Tel: (55) 55 33 61 14 informes@fonkel.com.mx www.fonkel.com.mx...
- Page 2 Notice This manual is issued for reference only, at the convenience of Ar- biter Systems. Reasonable effort was made to verify that all con- tents were accurate as of the time of publication. Check with Ar- biter Systems at the address below for any revisions made since the original date of publication, found on page v.
- Page 3 The responsibility of Arbiter Systems under this warranty is limited to repair or replacement, at Arbiter Systems’ option, of any product found to be defective. Arbiter Systems shall have no liability under this warranty unless it receives written notice of any claimed defect, within the earlier •...
- Page 4 The remedies provided herein are Buyer’s sole and exclusive reme- dies. In no event shall Arbiter Systems be liable for direct, indi- rect, incidental or consequential damages (including loss of profits), whether based on contract, tort, or other legal theory.
- Page 5 Viewing Timecodes Specifications 940A Utility Software Appendix A – IRIG-B Information Copyright ©Arbiter Systems Incorporated June 2017 All rights reserved. International copyright secured. PD0054700 Revision A A pdf version of this manual is available for download at www.arbiter.com. To reorder the printed manual contact Arbiter...
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Page 6: Table Of Contents
Battery Indication ....Model 940A Accessories .... - Page 7 Driver Software ..... 37 Updating the 940A ....37...
- Page 8 List of Figures 940A Connections ....Male BNC Breakout with Terminals ..The Home Screen at Startup ... . .
- Page 9 DCF77 Signal Elements ....34 940A Utility Opening ....37 Selecting COM Port .
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Page 11: Features
Operating on four Li-ion batteries, the 940A can run continually for about 12 hours with about 80 percent backlight brightness, and for about 24 hours at 20 percent brightness. Included in a 940A kit are the following: USB charger/power supply, USB Cable, 8 feet of RG-58 with BNC connectors, quick setup guide, and several cable adapters to match a variety of wire types and connectors. -
Page 12: Construction
Other useful information includes jitter error, time difference (In- put 1 - Input 2) and signal amplitude in volts. Additionally, the 940A provides a time domain display much like an oscilloscope. In this mode, each bit of the time code is identified, and may be verified with the specification. -
Page 13: Power Supply And Charging
Li-ion batteries. Internal batteries consist of four 2250 milliampere hour Li-ion cells, which should be able to operate the 940A for up to 18 hours with reduced backlight. Battery charging A micro USB connector is used to connect the included battery charger/power supply to 940A. -
Page 14: Model 940A Accessories
Quick Setup Guide PD0055400* 940A Printed Operation Manual AS0106800 USB 2.0A Male to Micro Cable CA0033700* BNC Coax Cable M/M CA0033808* BNC ”T”Conn F-M-F CN0003500* Terminal Block, Plug 2 Pin CN0019202* Case Soft 940A HD0068600* Table 1: 940A Accessories, *Included... -
Page 15: Connecting Time Signals
2 and AUX I/O port and a flashlight is located above the micro USB port. Coaxial Cable Input and output timing connectors on the Model 940A are female BNC, which is one of the most common connectors being used on electrical equipment today. Coaxial cables are usually fitted with... -
Page 16: Twisted Pair Cable
BNC connectors, which connect directly to the 940A. Twisted Pair Cable To adapt a twisted pair of wires to the female BNC input connector on the Model 940A, use a BNC breakout as pictured in Figure 2. Figure 2: Male BNC Breakout with Terminals Connecting Connect the breakout’s male BNC connector to the 940A, then at-... -
Page 17: Setup Screens
Real Time Clock (RTC). You only need to touch the screen buttons to make choices. When first powering on the 940A, it should display a startup message, as seen on page i, and then display the home screen, as seen above. -
Page 18: Navigating The Menus
Navigating the Menus With reference to Figure 3, there are two HOME menus – CON- FIGURATION and DISPLAY – with different buttons within each menu. TOUCH ACTIVATED AREAS ARE BLUE The Home Button appears in the bottom left corner of most screens, except of course, the home screen. -
Page 19: Configuring Input 1
For example, IRIG-B UNMODULATED. 5. Touch one of the Load configuration buttons, such as Load Off. 6. Touch the Compensate for 1 Second Delay, if required. Keeps the 940A time in sync with source. 7. Touch when finished. Configuring Input 2... -
Page 20: Viewing A Signal At Input 1
1. In the Home screen DISPLAY menu, touch 2. The input 1 display could look similar to Figure 5. 3. Touch if necessary to change the 940A mode to IRIG-B UNMODULATED. 4. Press to pause (freeze) the active signal in the display. -
Page 21: Configuring The Source
SOURCE SIGNAL SELECTION menu. 4. Touch to return to the Home screen. Once selected, the 940A produces the timing signal at source connector. When DISABLED, the 940A will not display the gear symbol. -
Page 22: Irig Source Configuration
IRIG Source Configuration The source signal can come from Input 1, Input 2, or Custom. Custom can generate its own signal. SOURCE IRIG CONFIGURATION 100% H TIME SOURCE Input1 Input2 Duplicate Input Custom APR 28, 2024 16:44:10 Local -8:00 LOCAL OFFSET: C37.118 2005 2011... -
Page 23: Custom Start Date And Time
Custom Start Date and Time 100% H SOURCE IRIG CONFIG Custom User Time 2016 Month Year Hour Minute Second SET FROM RTC SET TIME CANCEL Figure 8: Set Custom Time Screen Figure 8 illustrates the Custom Time window, which provides a method to manually set the source date and time. -
Page 24: Source Irig-B Bits
Source IRIG-B Bits IRIG-B Bits allows you to manipulate the IRIG bits to test time quality and a time change, such as Leap Seconds and Daylight Saving changes. One of the C37 values (i.e. 2005 or 2011 from Figure 7) must be enabled for this menu to appear. CONFIGURE SOURCE IRIG BITS 100% H Time Quality Values... -
Page 25: Setting The Dst Clock
Setting the DST Clock Manually sets the DST clock for a Daylight Saving Time event. 100% H CONFIGURE SOURCE IRIG BITS DST Change Over Time 2017 Month Year Hour Minute Second SET FROM RTC SET TIME CANCEL Figure 10: Setting the DST Clock 1. -
Page 26: Unmodulated Irig-B Source Level
Unmodulated IRIG-B Source Level Sets the drive level for the specific timing output source impedance or voltage. SOURCE OUTPUT LEVEL 100% H HI Drive (125ma @ 5V) HI Drive with 50 Ohm Variable Figure 11: Configuring the Source Output Level 1. -
Page 27: Source Dc Voltage Adjustment
Source DC Voltage Adjustment Use this menu to adjust the 940A source output voltage; works with unmodulated IRIG-B and 1 PPS. 100% H SOURCE OUTPUT LEVEL Edit DC Amplitude Volts SAVE CANCEL Figure 12: Adjust the Source Voltage 1. Touch the UP and DOWN arrows to adjust the IRIG-B un- modulated voltage level to your desired level. -
Page 28: Modulated Irig-B Source Level
Modulated IRIG-B Source Level Sets the modulated IRIG-B peak voltage and the modulation ratio. SOURCE OUTPUT LEVEL 100% H Variable Vpeak Modulation Ratio: 10:3 Figure 13: Modulated IRIG Source Output Level 1. From the SOURCE IRIG CONFIGURATION menu screen, OUTPUT LEVEL touch to open the SOURCE OUTPUT LEVEL menu screen. -
Page 29: Source Modulation Ratio
Source Modulation Ratio Sets the modulation ratio for modulated IRIG (B12x). 100% H SOURCE OUTPUT LEVEL Edit Modulation Ratio 10:3 Ratio SAVE CANCEL Figure 15: Adjust the Source AC Modulation Ratio 1. Touch the Modulation Ratio button to select the desired ratio –... -
Page 30: Source 1 Pps Configuration
Source 1 PPS Configuration Sets the time signal source from either Input 1, Input 2 or RTC. SOURCE 1PPS CONFIGURATION 100% H TIME SOURCE Input1 Input2 OUTPUT LEVEL Figure 16: Configuring the 1 PPS Time Source 1. From the SOURCE SIGNAL SELECTION menu screen, touch the 1 PULSE PER SECOND button. -
Page 31: Pps Source Output Level
1 PPS Source Output Level Sets the 1 PPS source output impendance and voltage. SOURCE OUTPUT LEVEL 100% H HI Drive (125ma @ 5V) HI Drive with 50 Ohm Variable Figure 17: Configuring the 1 PPS Output 1. Touch the Variable (50 Ohm Source) to open the SOURCE OUTPUT LEVEL adjustment screen. -
Page 32: Dcf77 Source Configuration
DCF77 Source Configuration Configures the DCF77 output for this one-minute time code. SOURCE DCF77 CONFIGURATION 100% H TIME SOURCE Input1 Input2 Custom APR 28, 2024 16:44:10 Local 0:00 LOCAL OFFSET Leap Second Configuration Enable Month: Daylight Saving Configuration Enable DST Active Change Over Time: JAN 10, 2024 20:54:45 Figure 19: Configuring the DCF77 Output... -
Page 33: System Configuration
System Configuration Choose from the five items shown in Figure 20. SYSTEM CONFIGURATION 100% H Flashlight: Speaker Volume: Auto Backlight: RTC Date/Time: May 01, 2016 12:34:56 Synchronize RTC: Input 1: Input 2: OFF: Figure 20: System Configuration 1. In the Home screen CONFIGURATION menu, touch SYSTEM 2. -
Page 34: System Menu Notes
NOTE: For Flashlight, Speaker and Backlight: if the “ON” or “AUTO” buttons are not selected and one of the sliders are moved, the level is remembered and is used when the 940A is powered back... -
Page 35: Manually Setting The Rtc
Manually Setting the RTC Manually adjust the Real Time Clock (RTC) from this menu. Use the UP and DOWN arrows to change the date and time value(s) forward or backward. 100% H SYSTEM CONFIGURATION Real Time Clock 2016 Month Year Hour Minute Second... -
Page 36: Viewing Timecodes
Viewing Timecodes DISPLAY Functions From the Home screen there are two categories: CONFIGURA- TION, and DISPLAY. DISPLAY allows you to view the incoming signals from INPUT 1, INPUT 2, both Input 1 and Input 2 and outgoing signal from the SOURCE connector. 100% CONFIGURATION DISPLAY... -
Page 37: Waveform Comparisons
Waveform Comparisons ON-TIME 1 PPS Start of next second in time code Unmodulated REFERENCE REFERENCE IRIG ZERO IRIG ONE Modulated Figure 23: 1 PPS & IRIG-B Waveforms Figure 23 illustrates two of the common methods of transmit- ting IRIG-B, plus one pulse per second (1PPS). Unmodulated is a square wave string of 100 bits and modulated is a 1 kHz carrier amplitude modulated with the same number of bits. -
Page 38: Unmodulated Irig-B
Unmodulated IRIG-B From the Home screen DISPLAY menu, press the button of the signal you wish to view. 100% H INPUT 1 IRIG-B UNMODULATED Time: 00:55:46 UTC TQ: Locked Jitter: 0.47 uS, 0.1 RMS Date: 01 JUL 2015 CTQ: <100ns In1 - In2 Delta T: ---.- uSecs DOY: 182 LSP: 0 LSD: 0... -
Page 39: Pulse Jitter
Rising Edge Jitter ~10 ms Measured Pulse Spacing Figure 25: Average pulse jitter is the average difference between the 10 ms reference and measured spacing for all 100 pulses; RMS jitter is the calculated RMS of the difference between the 10 ms and measured spacing for all 100 pulses. -
Page 40: Modulated Irig-B
In Figure 26 you will notice that the representative modulated IRIG-B waveform is not a perfect sine wave in all magnifications. This is because the 940A display is not able to reproduce it with resolution. For clarity the individual bits in the IRIG string are shown as a modified square wave, whereas the text above the wave-... -
Page 41: Input 1 Pps Timing
Input 1 PPS Timing INPUT 1 ONE PULSE PER SECOND 100% H Pulse Width: 10.0 mSecs Jitter: ---.- uS, ---.- RMS In1 - In2 Delta T: ---.- Amplitude: 4.8 Volts Figure 27: 1 PPS Signal Connected to Input 1 The 1 PPS signal is generally a 10 millisecond pulse that occurs every second, with the rising edge on time. -
Page 42: Source 1 Pps Timing
Source 1 PPS Timing Source ONE PULSE PER SECOND 100% H Pulse Width: 10.0 mSecs Amplitude: 5 Volts Load: 0 mAmps Figure 28: 1 PPS Signal at Source Connector The 1 PPS signal is generally a 10 millisecond pulse that oc- curs every second, with the rising edge on time. -
Page 43: Dcf77 Timing
DCF77 Timing 100% H INPUT 2 DCF77 Time: 08:20:08 Z1: 1 Z2: 0 Jitter: ---.- uS, ---.- RMS Date: 06 OCT 2016 A1: 0 A2: 0 In1 - In2 Delta T: ---.- uSecs DOW: Thu Amplitude: 4.8 Volts Figure 29: DCF77 Signal Connected to Input 2 DCF77 is a one minute time code with 58 bits of time informa- tion. -
Page 44: Dcf77 Signal Elements
Year Information content provided by third parties Month Day of the week Calendar Minute Hour Figure 30: DCF77 Signal Elements show as a 60 second clock. Time and marker details are seen around the circumference of the circle. The 59th second bit is missing for Standard DCF77. -
Page 45: Specifications
Specifications INPUTS Connectors Two BNC Signals IRIG-B (modulated, unmod- ulated, modified Manchester), DCF77, 1 PPS Levels 25 Vpk, maximum Impedance Selectable: high impedance, 50 ohms or 100 ohms. OUTPUT Connector One, BNC Signals IRIG-B (modulated, unmodu- lated), DCF77, 1PPS Levels 1 –... - Page 46 POWER Battery Type Li-ion (9000 mAh capacity) Operation 24 hours, typical Charge 8 – 12 hours with unit off External Voltage +5 Vdc Current Cable 24 AWG Required Connector USB Micro-B GENERAL Physical Size 204.7 x 166.5 x 48.5 mm (8.1 x 6.6 x 1.9 in.) 381 x 305 x 229 mm, shipping (15 x 12 x 9 in.)
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Page 47: The 940A Utility
The Utility will unpack the required files when necessary. Driver Software The 940A Utility software package includes the driver and the op- eration manual. Updating the 940A 1. Power on the 940A and start the 940A Utility. See Figure 31. Figure 31: 940A Utility Opening... -
Page 48: Selecting Com Port
6. Click the Upload To Device button. A progress bar will appear that counts the number of blocks loaded and the total. 7. After the upload, the 940A should restart and pause on the startup screen. A message in the startup screen should ap-... -
Page 49: 940A Firmware Ready To Upload
firmware version from the 940A. 8. On the 940A Utility you can also select Device, Read, and it should read the firmware version. 9. Touch the 940A display itself to leave the startup screen. -
Page 50: Irig-B Information
IRIG-B Information IRIG Time Code Formats Listed below are the various formats in the IRIG specification. Arbiter clock products produce Format B. Format Pulse Rate Index Count Interval IRIG-A 1000 PPS 1 ms IRIG-B 100 PPS 10 ms IRIG-D 1 PPM 1 minute IRIG-E 10 PPS... - Page 51 Encoding IRIG-B consists of 100 bits produced every second, 74 bits of which contain various time, date, time changes and time quality informa- tion of the time signal. It consists of logic ones, zeros and position identifier bits. There are three functional groups of bits in the IRIG-B time code: Binary Coded Decimal (BCD), Control Func- tions (CF) and Straight Binary Seconds (SBS).
- Page 52 Code Group Bits Includes BCD Seconds 0 to 8 Ref. bit at 0 BCD Minutes 9 to 18 Ref. bit at 9 BCD Hours 19 to 28 Ref. bit at 19 BCD Days 29 to 48 Ref. bit at 29 7 index bits BCD Year 49 to 58...
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