Settings For Bandwidth Checks - Tektronix 2215A Instruction Manual

b. Connect the leveled sine-wave generator output via a
50-52 cable and a 50-52 termination to the CH 2 OR Y input
connector.
c. Set the generator to produce a 50-kHz, 6-division
display.
d. CHECK— Display amplitude is 4.2 divisions or greater
as the generator output frequency is increased up to the
value shown in Table 4-3 for the corresponding VOLTS/DIV
switch setting.
Table 4-3

Settings for Bandwidth Checks

VOLTS/DIV
Switch Setting
2 mV
5 mV to 5 V
e. Repeat parts c and d for all indicated CH 2 VOLTS/DIV
switch settings, up to the output-voltage upper limit of the
sine-wave generator being used.
f. Move the cable from the CH 2 OR Y input connector to
the CH 1 OR X input connector. Set the VERTICAL MODE
switch to CH 1.
g. Repeat parts c and d for all indicated CH 1
VOLTS/DIV switch settings, up to the output-voltage upper
limit of the sine-wave generator being used.
3. Check Bandwidth Limit Operation
a. Set:
BW LIMIT
CH 1 VOLTS/DIV
A SEC/DIV
b. Set the generator to produce a 50-kHz, 6-division
display.
c. Increase the generator output frequency until the dis­
play amplitude decreases to 4.2 divisions.
d. CHECK— Generator output frequency is between 8.5
and 11.5 MHz.
Generator
Output Frequency
50 MHz
60 MHz
On (button in)
10 mV
ns
20
Performance Check Procedure— 2215A Service
e. Disconnect the test equipment from the instrument.
4. Check Common-Mode Rejection Ratio
a. Set:
BW LIMIT
CH 2 VOLTS/DIV
INVERT
b. Connect the leveled sine-wave generator output via a
50-52 cable, a 50-52 termination, and a dual-input coupler to
the CH 1 OR X and the CH 2 OR Y input connectors.
c. Set the generator to produce a 25-MHz, 6-division
display.
d. Vertically center the display using the Channel 1 POSI­
TION control. Then set the VERTICAL MODE switch to CH
2 and vertically center the display using the Channel 2 PO­
SITION control.
e. Set the VERTICAL MODE switches to BOTH and
ADD.
f. CHECK— Display amplitude is 0.6 division or less.
g. If the check in part f meets the requirement, skip to
part p. If it does not, continue with part h.
h. Set the VERTICAL MODE switch to CH 1.
i. Set the generator to produce a 50-kHz, 6-division
display.
j. Set the VERTICAL MODE switch to BOTH.
k. Adjust the CH 1 or CH 2 VOLTS/DIV Variable control
for minimum display amplitude.
I. Set the VERTICAL MODE switch to CH 1.
m. Set the generator to produce a 25-MHz, 6-division
display.
n. Set the VERTICAL MODE switch to BOTH.
Off (button out)
10 mV
On (button in)
4-5