Calibrator; Figure 3 9: Location Of The Calibrator And Internal Clock Outputs - Tektronix 11801C User Manual

11801C User Manual
The CALIBRATOR output connector provides a known signal output for
your use in calibrating sampling heads. This connector is found at the
bottom right of the front panel. See Figure 3 9.
Figure 3 9: Location of the CALIBRATOR and INTERNAL CLOCK
The signal from the calibrator output is a fast risetime, 250 mV square wave
with a period of approximately 10 ms.
The internal clock trigger source is synchronized with the calibrator output,
and provides a trigger event approximately 23 ns prior to the rising edge of
the calibrator signal (45.5 ns for option 1M). This synchronized trigger signal
is available at the INTERNAL CLOCK connector, located below the sam
pling heads.
To see the calibrator signal on the screen, follow these steps.
Step 1: Initialize the instrument (press the UTILITY button, touch Initial
ize, then touch Initialize again).
Step 2: Connect the CALIBRATOR output to any sampling head input,
using an SMA cable.
Step 3: Press the sampling head SELECT CHANNEL button for the
channel you are using.
Step 4: Select the internal clock trigger source (press the TRIGGER
button, touch the Source selector in the major menu, and touch the
Internal Clock selector in the pop up menu).
Step 5: Press the AUTOSET button.

Calibrator

The
and
CLOCK
Outputs
CALIBRATOR
INTERNAL
Outputs
3 19