Tektronix 2430 Service Manual

REV DEC 1986
n. Disconnect the test setup.
m. Repeat parts c through j using the CH 2 input and
controls.
I. Move the probe from the CH 1 input connector to
the CH 2 input connector.
k. Select VERTICAL MODE and set CH 2 on and CH 1
off. Select CH 2 COUPLING/INVERT to display that menu.
j. CHECK-Displayed square wave now steps down-
wards from the center horizontal graticule line and is
approximately .5 division in amplitude.
i. Set INVERT ON:OFF to ON (an inverted arrow
appears left of the CH 1 scale factor readout).
h. CHECK-Display for a square wave which steps
positive (upwards) approximately .5 division from the
center horizontal graticule line. VERIFY-That CH 1 COU-
PLING automatically switched from AC on to DC on.
g. Set 50 n ON:OFF to ON (the sine wave symbol is
replaced by an ohm symbol next to the CH 1 scale factor
readout).
f. CHECK-Display for a tilted square wave of approxi-
mately 2 divisions (average) amplitude centered vertically
around the center horizontal graticule line.
e. Set CH 1 COUPLING to AC (a sine wave symbol
appears next to the CH 1 scale factor readout in upper
left-hand corner of crt).
d. CHECK-Display for a square wave which steps
positive (upwards) approximately 2 divisions from the
center horizontal graticule line.
c. Set the CH 1 COUPLING/INVERT menu to DC on (a
GND symbol disappears next to the CH 1 scale factor
readout).
b. Connect the CALIBRATOR output signal to the CH
1 OR X input connector using a 1X probe.
4-6
5 msA SEC/DIVSet:
OFF
On
Select CH 1 COUPLING/INVERT
Set: 50 n ON:OFF
GND
OFF
On
Select CH 2 COUPLING/INVERT
Set: 50 n ON:OFF
GND
Off
Select VERTICAL MODE
Set: CH 2
200 mV
200 mV
Set: CH 1 VOLTS/DIV
CH 2 VOLTS/DIV
a. Recall the Initial Front Panel Setting by performing
the following sequence: Select SAVE/RECALL SETUP,
press the menu button labeled RECALL (menu will
change), and then press the menu button labeled 1. Make
the following changes to the front panel setup:
2. Check CH 1 and CH 2 AC/DC/GND
COUPLING/INVERT Modes.
q. Repeat b through n using CH 2 control settings and
input to verify 50 n OVERLOAD protection for CH 2.
p. Select VERTICAL MODE and set CH 1 off and
CH 2 on.
o. VERIFY-The readout display no longer indicates
"50 n OVERLOAD" and the CH 1 COUPLING/INVERT
menu indicates DC on.
n. Clear the 50 n OVERLOAD condition by setting
CH 1 COUPLING to DC.
m. Disconnect the Power Supply.
I. Turn the Power Supply off.
k. VERIFY-Approximately 10 seconds (no longer than
15 seconds) after CH 1 50 n ON:OFF is set to ON, the
readout display indicates "50 n OVERLOAD" and the
CH 1 COUPLING switches to GND.
j. Set 50 n ON:OFFto ON.
Performance Check and Functional Verification Procedure
2430 Service

Tektronix 2430 Specifications

General

Brand	Tektronix
Model	2430
Category	Test Equipment
Language	English