Performance Check Procedure
h. Set CH 2 Input Coupling to DC.
I. Set CH 1 VOLTS/DIV to 20 mV.
j. CHECK—Display amplitude to 4.5 to 5.5 divisions (neglect trace
width).
k. Connect a 50 O terminator to the CH 1 Input.
l. Set CH 1 VOLTS/DIV to 10 mV.
m. CHECK—Display amplitude to 4.5 to 5.5 divisions (neglect trace
width).
n. Set CH 2 VOLTS/DIV to 0.1 V.
0. Connect to 50 kHz signal from the Leveled Sine-Wave Generator to the
CH 2 input connector via a 50 £1 precision BNC cable and a 50 f l BNC
termination.
p. Adjust the generator output level to produce a 6-division CH 1 display.
q. Increase the generator frequency to 25 MHz.
r. CHECK—Display amplitude is 4.24 divisions or greater.
s. Disconnect the test setup.
2. A GATE Output
a. Set:
SEC/DIV 0.1 ms
TRIGGER MODE Auto
HOLDOFF Minimum (CCW)
b. Connect a test oscilloscope to the A GATE OUT Connector from the
rear-panel via 50 f l BNC cable.
c. CHECK—Test oscilloscope displays a signal with a high level between
2 V and 5.25 V and a low level between 0 V and 0.7 V.
d. CHECK—Duration of the high level is greater than or equal to 0.2 ms.
e. Set HOLDOFF Control to maximum (CW).
f. CHECK—Duration of the high level is greater than or equal to 2 ms.
g. Disconnect the test setup.
2245A Operators
7-51
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