Y Phase Difference; X-Axis Bandwidth - Tektronix 2246 1Y Service Manual

Performance Check Procedure—2246 1Y and 2246 Mod A Service
b. Connect calibration generator STD AMPL output
to the CH 1 input via a 5 0 -0 precision BNC coax­
ial cable.
c. Set calibration generator AMPLITUDE to 50 mV.
d. CHECK—X-Axis amplitude is between 4.85 and
5.15 horizontal divisions.
e. Disconnect calibration generator.
11. X -Y Phase Difference
a. Set:
Horizontal MODE
Vertical MODE
CH 1 Input COUPLING
b. Connect function generator (FG 502) output to
the CH 1 input via a 50-0. BNC coaxial cable and
a 5 0 -0 BNC termination.
c. Set function generator output for six divisions of
signal display amplitude at 100 kHz.
d. Set:
Horizontal MODE
CH 1 Input COUPLING
4-22
e. Position dot to graticule center.
f. Set CH 1 Input COUPLING to DC.
g. CHECK—ellipse opening at the center is 0.3
division or less, measured horizontally.
h. Disconnect function generator.

12. X-Axis Bandwidth

a. Connect
precision BNC coaxial cable and a 5 0 -0 BNC ter­
mination.
b. Set:
A
CH 1 (CH 2 off)
CH 1 VOLTS/DIV
DC
Vertical MODE
c.
of 50-kHz signal.
d. Set leveled sine-wave output to 3 MHz.
e.
X-Y f.
GND
the leveled
(SG 503) output to the CH 1 input via a 5 0 -fl
Set leveled sine-wave generator for six divisions
CHECK—X-Axis display
divisions or more.
Disconnect the test equipment from the 2246 1Y
or 2246 Mod A.
sine-wave generator
10 mV
CH 2
(CH 1 off).
is 4.2 horizontal