Performance Check Procedure-2225 Service
i.
Repeat Parts g and h for each of the following
CH 1 VOLTSIDIV switch settings: 20
mV through
0.2 V. Adjust the generator output and add or
remove the 1
OX attenuator as necessary to maintain
a five-division display at each VOLTSIDIV switch
setting.
j.
Move the cable from the CH 1
OR
X input
connector to the CH 2
OR
Y
input connector. Set the
Vertical MODE switch to CH 2.
k. Repeat Parts c through
i
for Channel 2.
I. Disconnect the test equipment from the instru-
ment.
5.
Check Bandwidth
a. SET:
VOLTSIDIV (both)
Vertical MODE
SECIDIV
b. Connect the leveled sine-wave generator out-
put via a
504 BNC coaxial cable and a 504 BNC
termination to the CH 1
OR
X input connector.
c. Set the generator to produce a 50-kHz,
six-
division display.
d. Increase the signal frequency until a
4.2-division display is obtained.
e. CHECK-That the frequency is greater than 50
MHz.
f. Repeat Parts c through e for all VOLTSIDIV set-
tings from 10
mV to 1 V.
NOTE
For the
1
-V-per-division VOLTSIDIV settings,
use a five-division display of the 50-kHz refer-
ence frequency; use 3.5 divisions peak-to-
peak as the -3
dB reference point of the
bandwidth.
g. SET:
CH 1
VOLTSIDIV 5 mV
CH 1 Vertical Magnification
XI0 (pull CHI
CAL knob
out)
h. Set the generator to produce a 50-kHz,
six-
division display.
i. Increase the signal frequency until a
4.2-division display is obtained.
j. CHECK-That the frequency is greater than
5 MHz.
k. Repeat Parts h through
j
for all ranges from
10
mV to 0.2 V.
I. Set the CH
1
Vertical Magnification to XI (push
CAL knob in).
m. Set Vertical MODE to CH 2.
n. Repeat Parts b through I for CH 2 using the
Channel 2 controls.
6.
Check Channel Isolation
a. SET:
CH 1
VOLTSIDIV 0.5 V
CH 2
VOLTSIDIV 1 V
CH 1 AC-GND-DC GND
SECIDIV 0.05 ~s
b. Set the generator to produce a 10-MHz, five-
division display.
c. Set CH 2 VOLTSIDIV switch to 0.5 V for a
1 0-division display.
d. Set Vertical MODE to CH 1.
e. Check that the CH 1 trace amplitude is less
than 0.1 division.
f. Move the test-signal cable from the CH 2
OR
Y
input connector to the CH 1
OR
X input connector.
g. SET:
Vertical MODE
CH 1 AC-GND-DC
CH 2 AC-GND-DC
CH 2
DC
GND
h. Check that the display amplitude is less than
0.1 division.
i.
Disconnect the test equipment from the instru-
ment.
Scans
by
ARTEK
MEW
*
REV
APR
1990
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