3 And Ch 4 Vertical Bandwidth; Scope Bw (Bandwidth Lim It) A Ccu Ra Cy - Tektronix 2245A Operator's Manual

Performance Check Procedure
17. CH 3 and CH 4 V e rtical Bandw idth
a. Set:
VERTICAL MODE
CH 3 and CH 4 VOLTS/DIV
b. Connect leveled sine-wave generator (SG 503) output to the CH 3 in­
put via a 50 n precision BNC coaxial cable and a 50 f l BNC termina­
tion.
c. Set the generator output for a six-division signal display at 50 kHz.
d. Set the generator Frequency Range and Frequency Variable controls
for a 90 MHz output frequency.
e. CHECK—that the signal display amplitude is 4.2 divisions or more as
the frequency is increased to 100 MHz.
f. Repeat the procedure for 0.5 VOLTS/DIV setting.
g. Move the test signal to the CH 4 input.
h. Set VERTICAL MODE to CH 4
i. Repeat the procedure for CH 4.

18. SCOPE BW (Bandwidth Lim it) A ccu ra cy

a. Set:
VERTICAL MODE
CH 1 VOLTS/DIV
SCOPE BW
b. Move test signal from the CH 4 input to the CH 1 input.
c. Set leveled sine-wave generator (SG 503) output for a six-division sig­
nal amplitude at 50 kHz.
d. Increase the leveled sine-wave generator output frequency, using the
Frequency Range and Frequency Variable controls until a signal display
amplitude of 4.2 divisions is obtained.
7-22
CH 3 (CH 2 off)
0 .1 V
CH 1 (CH 4 off)
10 mV
On
2245A Operators