TRIGGER
Adjustment Procedure—2230 Service
Equipment Required (See Table 4-1):
Leveled Sine-Wave Generator (Item 2)
BNC T-Connector (Item 11)
Low-Frequency Generator (Item 4)
50 Si BNC Termination (Item 12)
50 0 BNC Cable (Item 8)
600 fl BNC Termination (Item 13)
Dual-Input Coupler (Item 9) Screwdriver (Item 19)
See f" ADJUSTMENT LOCATIONS 1 ' andifjADJUSTMENT LOCATIONS 3
* at the back of the manual for test points and adjustment locations.
INITIAL CONTROL SETTINGS Storage
Vertical (Both Channels)
POSITION Midrange
VERTICAL MODE
BOTH-ALT
x-v
Off (button out)
BW LIMIT Off (button out)
VOLTS/DIV 0.5 V
VOLTS/DIV Variable
CAL detent
INVERT
Off (button out)
AC-GND-DC
GND
Horizontal
POSITION Midrange
HORIZONTAL MODE
A
A and B SEC/DIV
1 ms
SEC/DIV Variable
CAL detent
XI0 Magnifier
Off (knob in)
B DELAY TIME POSITION
Fully counterclockwise
B TRIGGER
SLOPE
OUT
LEVEL
Midrange
A TRIGGER
VAR HOLDOFF
NORM
Mode
P-P AUTO
SLOPE
OUT
LEVEL
Midrange
HF REJECT
OFF
A&B INT
VERT MODE
A SOURCE
INT
A EXT COUPUNG
AC
STORE/NON
SAVE/CONTINUE
PRETRIG/POST TRIG
ROLL/SCAN
1K/4K
POSITION CURS/
SELECT WAVEFORM
WAVEFORM
REFERENCE/
MENU SELECT
PROCEDURE STEPS
1. Adjust Channel 1 Trigger Offset (R309)
a. Set the Channel 1 trace and the Channel 2 trace to
the center horizontal graticule line using the Channel 1 and
Channel 2 POSITION controls.
STORE
CONTINUE (button out)
POST TRIG (button out)
SCAN (button out)
4K (button out)
POSITION CURS
(button in)
WAVEFORM
REFERENCE
(button in)
b. Connect the digital voltmeter low lead to chassis
ground and the high (volts) lead to TP460, located on the
bottom side of the Main circuit board.
c. CHECK—Note the offset voltage reading at TP460
for use in pari: e.
d. Set the A&B INT switch to CH 1.
e. ADJUST—Trig Offset (R309) so that the voltage
reading is the same as that obtained in part c.
5-27
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