ATG429EBPOperationManual
3‐1
June4,2015
Rev.A2
3 OPERATION
3.1 GENERAL OPERATION DESCRIPTION
The ATG 429EBP is a single channel ARINC 429 transmitter and receiver. It can receive and display all
ARINC 429 labels. It can simultaneously output up to ten 429 words. Data can be displayed and entered
in hexadecimal or engineering formats.
3.1.1 HEX MODE
The HEX mode has two types of data entry and display. The first type allows display and entry of bits 32 -
9 in hexadecimal format, reading left to right as 32 - 9. The label will be displayed in octal. The SDI (bits
10 - 9) is then displayed in binary. Bits 32 - 9 of the word are then displayed in HEX. On the far right of
the display will be the SSM bits (31 - 30) of the word. The second type in HEX mode allows display and
entry of bits 31 - 9 in binary format. The SDI bits (10 - 9) and SSM bits (31 - 30) each have their own
screen. The remaining bits (29 - 11) each have their own individual screen. Word rate for the word is also
available on a dedicated screen in the HEX mode.
3.1.2 ENG MODE
ENG (Engineering) mode allows data entry and display in engineering unit formats (Feet, Knots, MHZ,
etc.). The label definition will determine the number of screens required for display of the possible fields
of the word. Label definition may be changed by entering a new `EQID' (Equipment Identifier). If the new
ID is valid (per ARINC 429-11 attachment 2 or is included in Appendix A of this manual (Special Boeing
Labels)) for the currently selected label then the label will be decoded and displayed according to that
definition. If the ID is invalid for the label, a default definition will be used. The last ID entered will remain
active until changed or until the unit is turned off (unless in Trap or Protect mode).
NOTE: BITE Status Word (Label 356) has been assigned the same ID (7E) as the BITE Command Word
(Label 227) and will be displayed in engineering format. However, due to the many variations of data
types for the word, it must be entered in HEX format.
3.1.3 TRANSMIT & RECEIVE MODES
There are two distinct modes of system operation. The RX mode is the receiver mode of operation. The
TX mode is the transmit mode of operation. Selection of these modes and all other display operations are
accomplished by keypad or slide switch entry. The transmitter and receiver can operate at either 100kbps
(High Speed) or 12.5 kbps (Low Speed). Each mode's speed can be set independently of the other. The
parity of the words being transmitted can be set for either ODD or EVEN parity. An LED indicator will
show the parity selected for transmitted words if in the TX mode or the parity of the currently displayed
word if in the RX mode. These modes are described in the following sections.
3.1.3.1 TX MODE
The transmitter is capable of outputting up to ten 32 bit words in ARINC 429 or 419 bipolar RZ (Return-to-
Zero) format.
To Next Page
Loading...