the GATE TIME.
d. TOTAL A: When this mode is selected, the unit counts the cycles of
the signal at input A and continuously displays that count.
e. RPM A: When this mode is selected, the unit displays the RPM
(Revolutions Per Minute) of the signal at input A.
POWER SWITCH: This push type switch, turns on the power when pressed.
TILT STAND: Pull out to adjust tilt.
REPLACE ONLY WITH FUSE OF SAME RATING AND TYPE.
DO NOT REMOVE COVER. REFER SERVICING TO
DISCONNECT POWER SUPPLY BEFORE REPLACING FUSE.
1
INT STD OUT QUALIFIED PERSONNEL.
EXT STD IN
TO PREVENT ELECTRIC SHOCK HAZARD AND FIRE,
RS-232C
WARNING
6
5
2
3
4
FUSE
230V~, 50Hz/60Hz
FIG.3 REAR PANEL
AC INLET: AC power input connector
INT/EXT TIME BASE SELECTOR:
Selects the source of the time base. EXT.STD. IN
sets up BNC as a nominal 600Ω input impedance
path for an external 10 MHz time base signal. INT. STD.
OUT sets up BNC to monitor the internal time base
signal.
GROUND TERMINAL
FUSE HOLDER: Replace fuse by unscrewing
INT/EXT TIME BASE BNC:
Provides a connector through which the internal time
