1 To Ch 4 Signal Delay Match - Tektronix 2245A Operator's Manual

Performance Check Procedure
c. Connect calibration generator (PG 506) fast rise, rising-edge signal to
the CH 1 and CH 2 inputs via a 50 O precision BNC coaxial cable, a
50 f l BNC termination, and a BNC dual-input coupler.
d. Connect calibration generator trig out signal to the CH 3 input via a
50 f l BNC coaxial cable and a 50
e. Set the calibration generator to Fast Rise and adjust Pulse Amplitude
for five divisions of signal amplitude at 1 MHz.
f. Position the rising edges of the superimposed waveforms horizontally to
the center vertical graticule line.
It may be necessary to readjust the trigger level to display the
rising-edge signal In the Delay Match steps. This can be done by
pressing the upper Trigger MODE button to cause the trigger
level to be automatically readjusted.
g. Set X I0 MAG On (for 2 ns/div sweep speed).
h. CHECK—that the leading edges of the two waveforms have less than
0.1 horizontal division separation at the center graticule line excluding
trace width.
14. CH 1 to CH 4 Signal Delay Match
a. Set VERTICAL MODE to CH 1 and CH 4 (CH 2 o ff).
b. Move the CH 2 signal to the CH 4 Input connector.
c. Superimpose the CH 4 waveform on the CH 1 waveform.
d. CHECK—that the leading edges of the two waveforms have less than
0.1 horizontal division separation at the center graticule line excluding
trace width.
15. CH 3 to CH 4 Signal Delay Match
a. Set:
VERTICAL MODE
TRIGGER SOURCE
b. Move the CH 3 signal to the CH 2 input and the CH 1 trigger signal to
the CH 3 input.
7-20
Cl
BNC termination.
NOTE
CH 3 and CH 4 (CH 1 off)
CH 2
2245A Operators