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The easy method for troubleshooting ARINC 429 labels
Avionics
429EX ARINC 429 DATABUS ANALYZER
The 429EX provides avionics technicians and linemaintenance
personnel with an easy method for
troubleshooting ARINC 429 labels. It has the
capability to selectively trap labels three different
ways. The 429EX has a non-volatile memory and
features user-selectable ARINC Air Transport
Equipment Identifier Codes. Transmitted and
received data can be viewed in either hexadecimal
or easy-to-understand engineering format.
The 429EX is housed in a rugged, compact case
with internal, rechargeable NiCad batteries. The
unit comes with either a 110V or 230V plug-in battery
charger. An optional carrying case is available
for convenience and protection of the unit.
Transmitter Operation
The 429EX provides capability for transmitting up
to ten 32 bit words in ARINC 429 or 419 bipolar
RZ format. The transmit bit rate can be set for
high (100 kbps) or low (12.5 kbps) speed with
selectable odd or even parity. The unit allows keypad
entry of transmit label (octal) with data entry
via hexadecimal (bits 32 through 9) or by engineering
equivalent values. Entry by engineering
values allows individual entry of primary data
(miles, knots, MHz, etc.), SDI, SSM, word rate
and individual bit switching functions. Non-RF
labels have additional screens that allow for slewing
data with programmable slew limits and direction
of slew in desired increments. The transmitter
operation is completely independent of the
receiver, allowing simultaneous operation of both
the transmitter and receiver. Transmitted labels
can be stored in non-volatile memory.
Receiver Operation
The unit is capable of receiving and trapping (storing) up to 255 high
or low speed 32 bit words in 429 or 419 bipolar RZ format. The unit
is also capable of trapping 511 occurrences of one label of data only
from strings of data containing multiple words. The special trigger
trap mode expands receiver capabilities further to allow trapping of
block data protocols or of alphanumeric strings of data. The receiver
also allows the user to view all individual bits. Receiver bus speed
is switch selectable. LCD display of received labels is provided with
selection of hexadecimal or engineering formats. Initial receiver
screen displays the number of labels that have been received with
ability provided for stepping through each label for data display. Trap
mode allows operator to select which labels are to be trapped (four
possible user selectable label/data combinations). Access to received
or stored data is accomplished by single-step scrolling keys or by
automatic scrolling mode. Trapped data is stored in non-volatile
memory until cleared.
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