ATG429EBPOperationManual
3‐11
June4,2015
Rev.A2
3.3.3 USING THE RECEIVER TRAP FUNCTIONS
3.3.3.1 General Trap Mode
1. To trap the first 4096 labels received, depress the TRAP key. Unit will display TRAP LABEL,
depress ENT, unit will display DATA ?, depress ENT, unit will display TRIG LABEL, depress
ENT, unit will display DATA ?, depress ENT and unit will begin trapping. It is necessary to
depress ENT for the unit to default to the general trap mode. No data needs to be entered.
2. To view the trapped labels, depress the appropriate scroll key. To auto-scroll, depress the
C/AUTO key and display will automatically display one label approximately every second.
You can reverse the scroll direction by using the opposite scroll key. The display will show
the number of the trapped word. To stop auto-scroll, depress the C/AUTO key again.
3. By holding down either of the scroll keys, it is possible to speed up the sequence to reach a
specific label more quickly or, as an alternative, the current slot displayed may be edited
using the standard editing procedures.
4. To clear the trap memory, depress the TRAP key and the unit will return to receiving 4 labels
only.
3.3.3.2 Data Trap Mode
1. Depress the TRAP key Then the D/D.O. key and watch the display which will flash DATA
ONLY. The unit will now trap one word 8192 times. Enter TRAP LABEL 102 and depress the
ENT key until unit starts to trap. The unit is trapping label 102, 8192 times and the label is
transmitted at the rate of 500 MS. It is possible to start viewing individual labels while the unit
is still trapping by scrolling to the first few labels trapped. This does not interfere with the unit
which will continue to trap incoming labels.
2.
Once the unit is finished trapping it is possible to scroll through each label trapped and view
them individually. By depressing the LAB/DAT key and then the C/AUTO key you can view
label 102 which was trapped as it slewed from 9000 ft. to 10000 ft. It is also possible to view
all data on each individual label trapped including bits 11 to 29, SDI, SSM, etc.
3.
To clear the trap memory depress TRAP.
NOTE: When trapping using the DATA ONLY mode, it is necessary to enter a label as this
mode traps off of the label it is searching for.
3.3.3.3 Trapping Using the Data Mode
1. To trap when only data is known, depress the TRAP key. Depress the ENT key until DATA ?
is displayed.
2. Enter the data you wish trapped. (For our purposes, we will use 627100 which represents
10000 ft. in label 102 which we are transmitting and simultaneously slewing from 9000 ft. to
10000ft.)
3. The next screen will ask CARES ?. It is now necessary to enter 7FFFFF which is to mask
parity off to allow the unit to search for specific data. Depress ENT (it is necessary to depress
ENT three times) until the unit begins to trap.
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