Tektronix TLS 216 User Manual page 250

Triggering on States
Define the Pattern
Define the Pattern Logic
Set the Thresholds
Define the Clock (State)
3–168
To quickly set the logic level for each of the input channels (Ch1 – Ch16 and
Aux), do the following steps.
1. Press TRIGGER MENU
Pattern (main).
2. Press Ch Index (side). Use the general purpose knob or keypad (or
repeatedly press Ch Index) to enter the channel you want to set. The channel
selected appears in the Source menu item.
3. Press Set to High, Set to Low, and Set to Don't Care (side) to set the logic
level you want applied to the channel just selected. Note that setting the
logic level of a channel decrements the channel index to automatically select
the next channel.
4. Repeat step 3 to set all inputs to the levels you require. You can skip over
channels already properly defined (or return to a channel to redefine it) using
the general purpose knob, keypad, or Ch Index button.
NOTE. The logic scope will not trigger if all pattern inputs are set to Don't Care.
The logic scope only recognizes patterns that have at least one input set to HIGH
or LOW.
To define the Boolean requirement for a TRUE pattern, select the logic function
(AND, NAND, OR, or NOR), press TRIGGER MENU
STATE (pop-up) Define Logic (main)
(See Table 3–11 on page 3–165.)
You can set the threshold of each trigger input individually to the same or
different levels. Also, you can set the threshold of one trigger input and copy it
to a group of trigger inputs or to all trigger inputs with one operation. To set the
thresholds, refer the general procedure To Set Trigger Thresholds on page 3–162.
NOTE. See Trigger Sources and Thresholds on page 3–122 for special consider-
ations when setting trigger thresholds for the delayed trigger system.
To define the source, polarity (edge), and threshold of the signal used to clock
the state trigger, do the following steps.
1. Press TRIGGER MENU
Source (main) Channel or Auxiliary (side). When selecting a channel as
Type (main) State (pop-up)
AND, OR, NAND, or NOR (side).
Type (main) State (pop-up)
Define
Type (main)
Clock
TLS 216 User Manual