Tektronix 1A5 Instruction Manual page 90

Calibration — Type 1A5
24. Check High Frequency Response
a. Equipment setup is shown in Fig. 6-27.
b. Connect the following equipment to the A INPUT con ­
nector in the sequence given.
50 Ω GR-to-BNC Termination
5 ns GR Cable
5:1 50 Ω GR Type Attenuator
Type 191 Constant Amplitude Signal Generator
c. Set the oscilloscope Time/cm control to .5 ms.
d. CHECK — High frequency response for each of the set ­
ups given in Table 6-9, using the following procedure:
(1) Set the VOLTS/CM control to indicated setting.
(2) Set the Constant Amplitude Signal Generator fre ­
quency to 50 kHz and adjust its amplitude to provide 4 cm
display amplitude.
(3) Set the frequency of the Constant Amplitude Signal
Generator to the value opposite the applicable VOLTS/CM
setting in Table 6-9.
6-30
(4) CHEHK — 2.8 cm or more dis pl ay am p litude. Repeat
step 20 if results are unsatisfactory.
TABLE 6-9
Type 1A5
VOLTS/CM
1 mV
2 mV
5 mV
10 mV
20 mV
e. Disconnect the equipment. This conclud e s t he calibra -
tion procedure.
NOTE
See the applicable active probe manual for instruc ­
tions regarding the PROBE STEP ATTEN BAL adjust ­
ment procedure.
Constant Amplitude
Signal Generator
Frequency (MHz)
40
45
50
50
50