Model 940A Timing System Analyzer

Model 940A Timing System Analyzer

Reads, analyzes, and sources IRIG-B. The comprehensive instrument for power substation timing.

 

Model 940A User Manual
Download PDF(4 MB) »

Model 940A Reference Guide
Download PDF(750 kB) »

Model 940A Data Sheet
Download PDF(546 kB) »

Model 940A Data Sheet Español
Download PDF(528 kB) »

Model 940A Timing System Analyzer is a comprehensive instrument for power substation timing. Intuitive and easy to use, the Model 940A is designed to simplify timing system installation and maintenance. Capable of measuring and sourcing IRIG-B, DCF77, and 1PPS timing signals, the Model 940A is a must have tool for substation timing systems.

The Model 940A uses two identical input channels capable of measuring IRIG-B (unmodulated, modulated and modified manchester), DCF77 and 1 PPS timing signals. The timing signals are decoded and displayed as text and/or graphically showing the complete timing signal down to the IRIG-B bit level. The dual inputs allow for comparison to a calibrated signal or between different signal generators. The Model 940A Timing System Analyzer is also equipped with an output that can source modulated IRIG-B, unmodulated IRIG-B, 1 PPS and DCF77. Output levels, modulation ratios, and the timing reference are configurable. The flexibility to synchronize the timing reference to Input 1, Input 2, the internal Real Time Clock, or a user customized setting makes the 940A suitable to test any timing scenario.

  • Two input channels.
  • One customizable source channel.
  • Measures:
    • IRIG-B unmodulated
    • IRIG-B modulated
    • IRIG-B modified manchester
    • DCF77
    • 1 PPS
  • Industrialized display glass protects the 800 x 480 color TFT capacitive touchscreen.
  • Long life lithium-ion battery
  • Built-in LED flashlight.

I/O Configuration

Output Connectors

One, BNC female

Output Signals

  • IRIG-B modulated
  • IRIG-B unmodulated
  • DCF77
  • 1 PPS

Level: 1 Vdc to 15 Vdc, 1 Vpk to 10 Vpk
Drive: 125 mA at 5 V
Time Reference: Input 1, Input 2, Real Time Clock, or User

Input Connectors

Two, BNC female

Input Signals

  • IRIG-B modulated
  • IRIG-B unmodulated
  • IRIG-B modified manchester
  • DCF77
  • 1 PPS

Level: 25 Vpk maximum
Impedance: selectable: high impedance, 50 ohms, or 100 ohms.

Interface

Operator

Display
  • 800 x 480 color TFT capacitive touchscreen, backlit
  • Single or Dual Timing Signals
  • Data and/or Waveform
Functions

Real Time Clock: Reference to Input 1, Input 2, or User

Power Requirements

Standard

Voltage

Internal Battery

  • Type: Li-ion (9000 mAh capacity)
  • Operation: 24 hours typical
  • Charge: 8 hours to 12 hours with unit off

External Power

  • Voltage: + 5 Vdc
  • Current: 1 A
Inlet

Micro USB

General

Fashlight: Built in LED

Audio: Indicator tone (enable/disable)

Physical

Size

204.7 mm x 166.5 mm x 48.5 mm (8.1 in x 6.6 in x 1.9 in)
381 mm x 305 mm x 229 mm, (15 in x 12 in x 9 in), shipping
Weight

0.6 kg (1.4 lbs), maximum
2.5 kg (5.5 lbs), shipping

Environmental

Temperature

Operating: - 10 °C to + 50 °C
Charging: 0 °C to + 45 °C
Nonoperating: - 40 °C to + 75 °C
Humidity

Noncondensing
There are no additional Options available for this product.
Included
AP0008900 1 BNC (Female) Breakout to 100 mm Wires
AP0014900 2 BNC (Female) Breakout to Screw Terminal
AP0015300 External Power Supply, + 5 Vdc
CA0033700 Micro USB Cable, 6 ft
CA0033808 BNC Patch Cable (M-M) 2.5 m (8 ft)
CN0003500 BNC T-Connector (F-M-F)
CN0019202 Mating Connectors, 2-pole, 5 mm
HD0086000 Soft Carrying Case (940A)
PD0055400 Reference Guide (940)
Available
AP0003400 3 BNC (Male) Breakout to 100 mm Wires
AP0015000 4 BNC (Male) Breakout to Screw Terminal
AS0106800 Operation Manual (940A)
AS0112300 5 940A Broadcast Cable DB9F to RJ45F
CN0003400 BNC Barrel Connector (F-F)

1 Converts male BNC-terminated coaxial cable to pair of wires.
2 Converts pair of wires to female BNC.
3 Converts female BNC-terminated coaxial cable to pair of wires.
4 Converts pair of wires to male BNC.
5 Needed for serial broadcast.

Click to Download Latest Version of Software
940_Utility_31Jul2017_0100 Uploads firmware
940_Utility_SHA256_31Jul2017_0100 940_Utility SHA256 checksum
 

Software Version and Related Information

940 GUI Utility Software (940_Utility)

  • Compatible with Windows 7 and 10.
  • Windows 7 may require using the Device Manager to install the driver from the installation directory.
VersionRev LevelVersion Notes
31Jul2017 01.00

Initial release.

940_Utility_SHA256

VersionRev LevelVersion Notes
31Jul2017 01.00
Firmware Information (EPROM based firmware is not available for download)
940_Firmware_30Jun2022_0111 Downloadable. Use the 940Utility to import file into unit.
940_Firmware_SHA256_30Jun2022_0111 940_Firmware SHA256 checksum
 

Firmware Version and Related Information

Downloadable firmware upgrade (940_Firmware)

VersionRev LevelVersion Notes
30Jun2022 01.11

Updates are not security related.

  1. Fixed inconsistencies with the IRIG B006 with BCDyear only feature that was added in version 01.08. Some readings were available on the display when they were not available with B006. Example: SBS and control functions.
  2. Added Autoshutdown feature.
  3. Added warnings for questionable selections - Real Time Clock and Source.
  4. Use the Real Time Clock year if a year is needed but not available from the input.
  5. Other minor stability/clarity changes.

Posted to web site: 07 July 2022.
08Nov2021 01.10

Updates are not security related.

  1. Added command to broadcast the delta T value between Input1 and Input2 out from the AUX I/O port. Both inputs must have a signal to work. Time is from Input2.
    • "1B" starts and "0B" stops the broadcast
    • BAUD set to 115200
    • Need special cable (part no. AS0112300) to connect the RJ-45 to computer DB9.
      RJ-45 pin
      DB9 pin
      5 Tx
      2 Rx
      7 Rx
      3 Tx
      8 GND
      5 GND

Pin 1 lines up with the "A" in the AUX I/O label.

Posted to web site: 16 November 2021.
15Jul2021 01.09

Updates are not security related.

  1. Added parity selection to source IRIG bits configuration.
    • Could always decode IRIG-B with odd parity.
    • Can now choose to source IRIG-B with odd parity.
    • Source > Duplicate Input now replicates the parity of the source.
  2. Made the Arrow button bigger. Now it is easier to press and toggle between the text and graphic display.
  3. Removed the Pause/Run button when the input channel or source is disabled.

Posted to web site: 15 July 2021.
19Jan2021 01.08

Updates are not security related.

  1. The 1 PPS display now shows values from 100 microseconds to < 1 second.
  2. When there is no signal, the 1 PPS data changes to dashes and the data plot disappears.
  3. Added support for IRIG B006 with BCDyear only, no other control functions and no straight binary second data (SBS)

Posted to web site: 21 January 2021.
19Jun2019 01.07

Updates are not security related.

  1. Increased allowable pulse width error to 200 µs. Allows for greater compatibility while reading marginal IRIG-B signals 
  2. Added average pulse width error to IRIG-B unmodulated data display. This gives a quality indication of the marginal pulse widths detected.

Posted to web site: 8 July 2019.
24Apr2019 01.06

Updates are not security related.

  1. Fixed intermittent screen corruption during power up.

Posted to web site: 03 May 2019.
20Mar2019 01.05

Updates are not security related.

  1. Fixed issue with IRIG-B 1 second compensation setting and Leap Second application. (BZ883).

Posted to web site: 20 March 2019.
09Oct2018 01.04

Updates are not security related.

  1. Added Autodectect IRIG-B function.
  2. Fixed DCF-77 time display (BZ750).
  3. Added labels to indicate the IRIG-B modulated values are Vpeak.
  4. Added high impedance input mode.
  5. Fixed the C37.118 (IEEE 1344) data bit interpretation when C37.118 (IEEE 1344) data is not received.
  6. Minor fixes to clean display and improve operation.
31Jul2017 01.01

Updates are not security related.

  1. Leap second fixes.
  2. Firmware upload more robust.
  3. Improved synchronization.
  4. Improved holdover.
  5. Allow local offset in 30 minute increments.
  6. Fixed One Second Compensation.
  7. Many other improvements and enhancements to better serve your needs.

940_Firmware_SHA256

VersionRev LevelVersion Notes
30Jun2022 01.11
08Nov2021 01.10
15Jul2021 01.09
29Jan2021 01.08
19Jun2019 01.07

IRIG-B Time Code Accuracy, IED and System Design Issues
Download irig_accuracy_and_connection_requirements.pdf (31 kB) »

IRIG Standard 200-16
Download irig-b_200-16.pdf (857 kB) »

IRIG-B Specifications
Download irig_b_spec_brief.pdf (488 kB) »

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