Specifications
38
Subject to change without notice
to be used can be dened with the menu item NUMBER OF
SYMBOLS as 1,2 or 3. (The length of the symbols 5 to 9 bits was
already set when dening the bus, it is automatically taken into
account here). Select the menu item PATTERN INPUT for the
entry of the values of the symbols which may again be in binary
or hexadecimal format. If binary input is selected, the individual
bits can be selected with the soft menu key SELECT BIT and the
universal knob. With the soft menu key VALUE each bit can be
set to 0,1 or X (don’t care). If hexadecimal is selected, use the
soft menu key VALUE and the universal knob to set the value
of each symbol. The soft menu key SELECT SYMBOL is used to
switch from symbol 1 to symbol 2 and to symbol 3 (if the num-
ber of symbols was set to 3.) The presently active byte will be
identied in the display window by a green frame. Pressing the
MENU OFF key twice will close all menus, and the oscilloscope
will now trigger on the data set.
Use the respective soft menu key on page 2 of the UART trigger
lter menu to select a PARITY ERROR, a FRAME ERROR or a
BREAK as the desired trigger condition.
Fig. 12.13: Page 2 of the UART trigger menu.
Fig. 12.12: UART data trigger menu
Serial bus analysis