When connected to an ARINC 573 or 717 databus, the HT717-1 automatically senses and adjusts to the bit rate. It then synchronizes to the sync words in the serial data stream. Status is continuously reported including the bus speed, state of the sync, and current subframe and superframe. To display a particular flight data parameter the operator specifies the word by entering the desired word number, subframe, and superframe. The display is updated each time the specified word is received. Subframes and superframes may be specified uniquely or as odd, even, or all.
Several menus provide added versatility by allowing the operator to select the following operational and display features. ARINC 573/717 words are 12 bits long and are displayed in binary and simultaneously in either octal, hexadecimal or decimal. To provide for non-standard and older 573 equipment, reversed and non-standard sync values and reversed data display may be selected. Since superframes are not defined in the standard, the superframe location may be specified in a menu.
section contains data sheets with complete information for the HT717-1 product.