ATG429EBPOperationManual
3‐9
June4,2015
Rev.A2
6. Non-volatile memory that stores previously entered information when protection feature is
turned on.
7. Additional, expanded selective trap capabilities.
8. Dynamic display of slewed and ramped data.
9. Individual display and control of bits 11 to 29.
10. Separate screens for SDI and SSM.
11. Non-volatile memory for RX and TRAP mode.
3.3.1 TRANSMITTER FUNCTIONS
3.3.1.1 Entering Transmit Labels and Protecting Data
1) Turn on the 429EBP (unit will self test and go to the receive mode). To clear the transmitter if
it contains labels, depress the trap key displaying NOT PROTECTED and turn unit off for 5
seconds then back on.
2)
Depress the TRAP key for PROTECTED or NOT PROTECTED data mode. When data is
NOT PROTECTED it will not be retained in the 429EBP memory when it is turned off. Set
unit to PROTECTED.
3)
Depress scroll up arrow to access transmitter #1 which will display TX 1 INACTIVE.
NOTE: Arrow keys are scroll up/down keys.
4)
Depress the EDIT/DEL key and LABEL ? will appear. Enter the first label: LABEL ?. Enter
033 and depress ENT key. Unit now displays 033 ILS FREQ and you can view the default
data for this label by depressing the LAB/DAT key. To scroll through the data use the
UP/DOWN arrows. This step is the same for all future labels to be entered. To correct an
incorrect label, simply edit over it and enter correct label. To clear a transmitter and show the
TX INACTIVE, edit and enter 0.
5) Depress the LAB/DAT key and return to label 033. Use the scroll up key to access TX 2
INACTIVE. Depress EDIT/DEL and enter label 034 VOR FREQ. Repeat this procedure and
enter LABEL 035.
6) Scroll to TX 4 and enter Label 102 SEL ALTITUDE. The following sequence is to slew and
ramp the data within a selected non-RF label. For demonstration purposes we will limit this to
label 102.
NOTE: For all data entry that follows it will be necessary for the user to follow the previous
sequence of depressing the appropriate keys such as EDIT/DEL and ENT as well as the
scroll keys to access all of the data displays for editing.
a) Depress LAB/DAT key. Depress the up arrow key as required until SLEW appears.
b) SLEW defines the value that our data will change by. Enter 100 ft. (EDIT - 100 - ENT).
c) Scroll to MAX=65520. This is the default limit in the ARINC specification truncated to 12
bits. Enter 10000 ft.
d) Scroll to MIN=00000 and enter 9000 ft. The display will now announce 08992 instead of
9000. This is due to the program using only the first 12 bits of significant data (bits 28 to
17). Other bits are truncated and this results in a resolution of 8 ft for limit checking for
this label.
e) Scroll to SLEW ALT OFF. To turn this feature on simply depress EDIT and enter 1. (1
turns ALT ON and 0 turns ALT OFF). When SLEW ALTERNATING is on, slewing will
continuously occur bi-directional reversing itself when upper and lower limits are reached.
When this feature is off, slewing will occur in only one direction, up/down,
positive/negative.
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