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National Instruments 784804-01 PXI ARINC 429 Interface Module

Part Number 784804-01 is the identifying part number for the National Instruments LV-222-442-442 PXI ARINC 429 Interface Module. ARINC 429 is one of the most common ARNIC ( Aeronautical Radio Incorporated) standards that defines the transfer of digital data between commercial avionics systems. This standard uses broadcast bus topology and a label identification method for data words. 

The 784804-01 features 32 channels that can be configured as both transmitters and receivers. The receive channels have automatic speed detection, independent label, and SDI filtering, while each transmit channel can automatically maintain accurate label repetition rates. Furthermore, both channels can be set independently for low or high speed (12.5 or 100 Kbps). 

The 784804-01 also supports non-standard speeds and the configurable frequencies can be set for each transmit and receive channel through software. This allows operating the channels with equipment that does not adhere to the ARNIC 429 standards. A bit-rate configuration function can be used to produce the non-standard frequencies. The 784804-01 has extensive generation capability and error detection features which makes it an ideal device for product development and testing. It can check for inter-message gap errors, bit count mistakes, and parity bit problems, for instance. It can also play back stored data transmissions and transmit asynchronous and periodic messages. Furthermore, it can monitor data streams and apply timestamps to received messages. 

The 784804-01 interfaces through a PCIe interface and supports transfer rates of 2.5 Gbps as per direction. Keep in mind that the module may take power from the host PXIe slot, thus it doesn't need an additional power source. Additionally, the device has an integrated test circuitry that may be used to verify if the device is operating as intended and test the card's capabilities.

Some modules similar to the 784804-01 also offer additional capabilities like parametric waveform control and output state control. The parametric waveform control allows control over transmit amplitude, offset and null voltages, common-mode bias, rise time, and fall time. Similarly, the output state control allows opening either the output leg of a transmit channel or shorting either the output leg of a transmit channel to the ground.