Tektronix 2205, Operator'S Manual

Page: 52 / 91

Applications
Substituting given values in the formula:
Rise Time
5 div x 1 us/div
1
5. p.s
Tim e Difference Between Pulses on T im e-R elated Signals
The calibrated sweep speed and dual-trace features of the 2205
allow measurement of the time difference between two separate
events. To m easure.tim e difference, use the following proce­
dure:
1. Set the TRIGGER SOURCE to C H I.
2. Set both input coupling controls to the same position.
3. Using probes or cables with equal time delays, apply a
known reference signal to the CHI input connector and ap­
ply the comparison signal to the CH2 input.
4. Set both VOLTS/DIV controls for a display of about five divi­
sions.
5. Set VERTICAL MODE to BOTH; then select either ALT or
CHOP, depending on the frequency of the input signals.
6. If the two signals are opposite in polarity, set the middle
VERTICAL MODE selector to CH2 INVERT to invert the Chan­
nel 2 display.
7. Adjust the TRIGGER LEVEL control for a stable display.
8. Set the SEC/DIV control to a sweep speed that provides
three or more divisions of horizontal separation between
measurement points on the two displays. Center each of
the displays vertically (see Figure 3 -7 ).
3-12
2205 Operator's