Figure 2 4: Sampling Head Control Panel (Sd 24 Shown) - Tektronix 11801C User Manual

11801C User Manual
APC 3.5
Connectors

Figure 2 4: Sampling Head Control Panel (SD 24 shown)

Step 5: Press the SELECT CHANNEL button nearest the sampling
head input you have connected to the calibrator.
The yellow light on the sampling head blinks, indicating that the channel is
being displayed.
You don't see a trace on the display because the trace is not triggered. The
trigger icon ( ) at the left of the graticule shows !not! above it meaning the
11801C is not triggered. This icon always shows you the trigger status.
The 11801C has an internal clock, which is synchronized with the calibrator
output. You will use this clock to trigger the trace. To set triggering, you need
to use the Trigger major menu.
Step 6: Press the TRIGGER major menu button in the MENUS column.
This displays the Trigger major menu. The Source selector indicates that the
current trigger source is the External Direct. You need to change the source
to Internal Clock.
Example 1: Displaying a Trace
Input
2 7