OmniBus® Family for ARINC 708

OmniBus 708

OmniBus 708 refers to the ARINC 708 capabilities available for all modular OmniBus platforms. Its receivers and transmitters communicate over the display databus of an ARINC 708 airborne pulse Doppler weather radar. Modules are available with one or two pairs of receivers and transmitters and with variable transmit amplitude (parametric). Software-selectable word lengths and pre-sync pulses support custom protocols.

OmniBus 708 provides the capability to test and simulate weather radar CDUs (Control-Display Unit) and T-R (Transmit-Receive) units. Combined with an OmniBus 429 module, the control functions of a weather radar can also be simulated on a single OmniBus platform.

OmniBus Product Family

Ballard's OmniBus products connect computers or networks to one or more avionics databuses. Separate web pages provide information on OmniBus platforms (PCI, cPCI, PMC, VME, USB/Ethernet), avionics protocols (MIL-STD-1553, ARINC 429, ARINC 708, ARINC 717, and CSDB), serial ports (RS-422/232/423), and Discrete I/O.

Applications for OmniBus products include testing, simulation, and operational uses of avionics databuses. OmniBus products are built around an intelligent platform that can host one or more protocol modules. This flexible architecture accommodates mixed protocols, high channel counts, and unsurpassed processing power.

General

• ARINC 708 modules are available in transmitter/receiver pairs (1R/1T or 2R/2T)
• Each transmitter and receiver can operate concurrently
• The transmitter/receiver of each pair can independently operate on either of two buses
• Parametric 708 modules provide variable transmit amplitude
• All OmniBus 708 channels support standard ARINC 708 1600-bit words and syncs
• Custom protocols are supported by variable word lengths and programmable pre-sync pulses
• Configurable bit order for LSB (default) or MSB order (MIL-STD-1553 order)
• Easily read and write header fields (such as angle, gain, etc.) and range bins
• Software-selectable bus termination
• Internal self-test bus facilitates built-in test and diagnostics

Transmitters

• Multiple frames facilitate data handling (write to one set of frames while the other set of frames is transmitting)
• Configurable frame frequency (in Hz) controls the repetition rate of 708 words
• Trigger options (3 trigger inputs per module):
  • Configure a transmitter to externally trigger each message
  • Assign one trigger to multiple transmit channels for synchronized operation
  • Programmable polarity eases integration with external equipment
  • Use one or more lines and conditions to create multiple unique triggers

Receivers

• Each received message is stored in a message record that includes:
• The 1600-bit word
• Any bits beyond 1600 (for variable bit count mode)
• Total number of bits (for variable bit count mode)
• Time-tag
• Channel number
• Detected errors
• Detected errors:
• Sync
• Manchester
• Long word
• Short word
• Optional error signaling through digital output(s)

Sequential Monitor

• Create a sequential record in on-board memory or stream to file (with a simple program)
• Monitor concurrently with transmitter/receiver operation
• Monitor recording modes:
• Circular
• Fill and halt

Time-Tags

• Use 32-bit binary timer or 64-bit IRIG timer (displays day/hour/min/sec/ms/µs)
• IRIG timer options:
• Select IRIG-B or IRIG-A format
• Generate IRIG signal or sync up to an IRIG signal (on-board or external)
• Initialize timer to time of day or other value

Interrupts/Logging

• Event log can be polled or configured to generate interrupts to the host PC
• The following events may be user-selected for logging/interrupts:
• When the monitor is full or halts
• On a user-specified frequency of monitored messages
• When tagged messages are sent or received

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The Downloads section contains data sheets with complete information on ARINC 708 functionality for OmniBus products.

Type Title Date   Datasheet OmniBus 708 Datasheet 7/1/2004   Datasheet OmniBus Family Datasheet 3/25/2004 API Manual BTIDriver 708 Manual 10/23/2009 Driver OmniBus PCI Driver Win32/64 1/20/2010 Driver OmniBus cPCI Driver Win32/64 1/20/2010 Driver OmniBus VME Driver Win32/64 1/20/2010 Driver OmniBusBox Driver Win32/64 1/20/2010 Driver OmniBus PMC Driver Win32/64 1/20/2010 Examples OmniBus C Examples 10/23/2009 Examples OmniBus VB Examples 7/28/2009 Examples OmniBus LabView Examples 1/21/2010 Examples OmniBus VB.NET Examples 7/28/2009 Examples OmniBus C-Sharp Examples 7/28/2009 Examples Williamsburg Library and Examples 3/3/2010

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