HP 120A - Page 16

T
THEN ADJUST TRACE INTENSITY.
INTENSITY FOCUS
POWER
@ ROTATE TO MOVE TRACE VERTICALLY.
SET TO | sweep TIME | DESIRED OR TO | HORIZ. SENS. |
SET TO
HORIZ. POS
CAL FOR CALIBRATING SIGNAL.
DESIRED
SCALE LIGHT
VOUS/CM
________ SWITCH OUT OF CAL. POSITION TO ADJUST BETWEEN RANGES OF
SWEEP EXPAND
MiLusrcc ’ .Dscw
SELECT [ ac ] OR |~Dc] COUPLING FOR VERTICAL INPUT.
SELECT AC
DC I COUPLING (HORIZONTAL INPUT).
SET CAIN OF VERTICAL AMPLIFIER
REMOVE SHORTING BAR WHEN CONNECTING A BALANCED INPUT SIGNAL
SET T o [ xs ] fo R EXPANDED [ xs ] SWEEP
ADJUST FOR STATIONARY VERTICAL POSITION OF TRACE WITH MAX.TO MIN.
SET TO IINT.+-
OPERATION OF |vERT. SENSITIVITY| | VERNIER|
SET TO [ line I TO SYNCHRONIZE AT LINE FREQUENCIES.
TRICOCM
LEVEL
ICO
200
TO OBTAIN A PATTERN EASILY, SET THE CONTROLS EXACTLY AS
SHOWN AND PERFORM THE NUMBERED STEPS IN SEQUENCE.
USE SAME PROCEDURE WHENEVER DIFFICULTY IS ENCOUNTERED IN OBTAINING A PATTERN
THIS WILL ELIMINATE FAULTS DUE TO MISALIGNMENT OF CONTROLS, AND WILL ISOLATE ANY
TROUBLES TO MAJOR SECTIONS.
VERNIER
VERT SENSITIVITY
SET FOR |VERT.SENSITIVITY| DESIRED.
RANGES OF | VERT SENSITIVITY | SWITCH.
| SWEEPTIME | OR | HORIZ . SENS. | SWITCH.
VERNIER
SWEEP TIME HOR. SENS.
HlCROStCO.05.-CM ’
ROTATE CLOCKWISE TO TURN ON ,. WAIT 30 SECONDS,
; 1 11
1 ft •
* ! t 1
: • • r
y_
(ROTATE CLOCKWISE TO ADJUST
R | auto ] SWEEP
| trig ger level ]
SET TO [ ext . | for EXTERNAL SYNCHRONIZATION