Tektronix 2230

Performance Check Procedure— 2230 Service
g. Set:
VERTICAL MODE CH 2
A&B INT CH 2
h. Move the cable from the CH 1 OR X input connector
to the CH 2 OR Y input connector.
4. Check External Trigger Ranges
a. Set:
CH 1 VOLTS/DIV
A SEC/DIV
XI0 Magnifier
A TRIGGER SLOPE
A TRIGGER Mode
0.5 V
20 /ts
Off (knob in)
OUT
NORM
i. Repeat part f.
j. Disconnect the test equipment from the instrument.
3. Check External Triggering
a. Set:
VERTICAL MODE CH 1
CH 1 VOLTS/DIV . 5 mV
HORIZONTAL MODE A
A SEC/DIV 0.1 Ms
HF REJECT OFF
A&B INT CH 1
A SOURCE EXT
b. Connect the leveled sine-wave generator output via
a 50 Q cable, a 50 n termination, and a dual-input coupler
to both the CH 1 OR X and EXT INPUT connectors.
c. Set the leveled sine-wave generator output voltage
to 40 mV and the frequency to 10 MHz.
b. Set the generator to produce a 50 kHz, 6.4-division
display.
c. CHECK—Display is triggered along the entire posi
tive slope of the waveform as the A TRIGGER LEVEL
control is rotated.
d. CHECK—Display is not triggered (no trace) at either
extreme of rotation.
e. Set the A TRIGGER SLOPE button to IN.
f. CHECK—Display is triggered along the entire nega
tive slope of the waveform as the A TRIGGER LEVEL
control is rotated.
g. CHECK—Display is not triggered (no trace) at either
extreme of rotation.
d. CHECK—Stable display can be obtained by adjust
ing the A TRIGGER LEVEL control for each switch combi
nation given in Table 4-7.
e. Set:
CH 1 VOLTS/DIV 50 mV
X I0 Magnifier On (knob out)
5. Check Single Sweep Operation
a. Adjust the A TRIGGER LEVEL control to obtain a
stable display.
b. Set:
Channel 1 AC-GND-DC GND
A SOURCE INT
f. Set the generator output voltage to 120 mV and the
frequency to 60 MHz.
g. Repeat part d.
h. Set the generator output voltage to 150 mV and the
frequency to 100 MHz.
i. Repeat part d.
c. Press in the SGL SWP button. The READY LED
should illuminate and remain on.
d. Set the Channel 1 AC-GND-DC switch to DC.
NOTE
The A INTENSITY control may require adjustment to
observe the single-sweep trace.
4-19