Tektronix 2245A - 3 And CH 4 Vertical Bandwidth; SCOPE BW (Bandwidth Lim It) a Ccu Ra Cy

Performance Check Procedure
17. CH 3 and CH 4 Vertical Bandwidth
a. Set:
VERTICAL MODE CH 3 (CH 2 off)
CH 3 and CH 4 VOLTS/DIV 0.1V
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 Limit) Accuracy
a. Set:
VERTICAL MODE CH 1 (CH 4 off)
CH 1 VOLTS/DIV 10 mV
SCOPE BW On
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
2245A Operators