ATG429EBPOperationManual
3‐3
June4,2015
Rev.A2
3.1.3.2.1 NORMAL MODE
Normal mode (default) is a dynamic mode that displays all unique labels received (255 possibilities, 000
label is invalid). In this mode the screen is updated 4 times per second with the latest data received.
3.1.3.2.2 FILTER MODE
FILTER mode is identical to normal mode with the exception that words received will be displayed
according to label and SDI. This allows up to 1020 combinations (000 Label is invalid).
3.1.3.2.3 TRAP MODE
The third and most powerful mode is the `TRAP' mode. This is a static mode of operation which captures
and stores the data for detailed analysis. Words are received and stored in the trap buffer in their order of
occurrence. They will remain in the buffer until the trap mode is turned off, even if the unit power is turned
off. In normal trap mode up to 4096 unique words may be stored. In this mode the time that has elapsed
since the previous word is stored as the rate. In `DATA ONLY' trap mode up to 8192 words (must be the
same label) are stored. The rate is invalid in this mode of operation. Normally the trap will fill to capacity
with received words and stop. All subsequent words received will be discarded. A secondary mode of
operation is possible where all words pass through the trap until the trigger parameter is met (or the
CONT TRAP key is pressed). This mode is called CONTinuous Trap. This allows viewing the bus activity
prior to the trigger. If the trap 'rolls over' (receives more than the trap capacity allows) prior to the trigger
being met, the last 4096 words (or 8192 in Data Only mode) will be captured. The 429EBP will then
adjust so that the first word scrolled UP to from the count screen will be the oldest word and the first word
scrolled DOWN to will be the newest word regardless of their position in the buffer.
3.1.3.2.3.1 TRAP TRIGGERS & FILTERS
The trap has user definable trigger and filter parameters. Triggering specs may be set in 1 of 4
combinations: Don't Care Label/Don't Care Data (No Trigger), Specific Label/Don't Care Data, Don't Care
Label/Specific Data Pattern, Specific Label/ Specific Data Pattern. Filtering specs may be set to filter the
data in 1 of 4 combinations: All Labels/All Data, Specific Label/ All Data, All Labels/ Specific Data Pattern,
and Specific Label/Specific Data pattern. The data pattern for each spec can be from 1 to 24 bits. If a
data pattern is entered for either spec the user will be prompted for a `CARES' mask. If a bit is set in this
mask, the corresponding bit in the received data will be checked against the same bit in the desired data
pattern. The user may simply press the enter key if the prompted parameter is a don't care to the user.
Data and care patterns must be entered in hexadecimal (up to 6 chars) if used. As an example, if a DATA
pattern of 000001 and a CARES pattern of 000003 (default) is used then only the SDI bits (10 - 9) will be
checked for an SDI of 01. The status of a bit in the DATA pattern is irrelevant if the corresponding bit in
the CARES pattern is not set.
3.1.3.2.3.2 PRINT MODE
The data stored in the trap buffer may be printed out on an IBM compatible parallel printer through the 25
pin female DSUB connector on the side of the 429EBP. There are two print drivers available in the
429EBP. The default driver makes the 429EBP compatible with a Seiko DPU-201G thermal 27 column
printer. The second driver makes the unit compatible with an IBM compatible 80 column printer. The
429EBP will print data from the current slot displayed to the end of the buffer (or valid data). A print
sequence may be aborted early by turning the unit off. Since data is retained in non-volatile memory, no
data will be lost.
3.1.4 IDLE MODE
To minimize battery drain, the 429EBP has the capability to sense when there has been no activity
(keypad, TX, or RX) for at least 5 minutes. When this happens, the 429EBP will shut down some of its
circuitry and go to `Sleep'. In this state, the 429EBP is fully functional, but it is in a low current drain wait
state. The LCD screen will be blank, but either the TX or RX LED will be lit. Any keypad or RX activity will
reawaken the 429EBP to its normal operation mode.
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