TM 11-6625-2735-14-1
OPTION 7
Option 7 is a dc to ac inverter that permits Tektronix
Oscilloscopes to operate on 12 or 24V dc with no
performance deterioration. Circuitry is provided to protect
against damage due to connection of 24 V when in the
12 V mode of operation.
The 24-volt external input permits use with conven-
tional dc power (marine and aircraft).
Option 7 is an integral part of the oscilloscope. The
modified oscilloscope has a three-position voltage input
selection slide switch (visible through the right-hand side
panel) at the rear of the line voltage selector switch. A dc
input connector is located below the fan cover on the rear
panel.
SPECIFICATIONS
AC Requirements
No increase in ac requirements over those of os-
cilloscopes not having Option 7.
DC Requirements
11.5 to 14 volts or 22 to 28 volts. 11.5-volt operation
excludes graticule light operation and Option 5. Operating
range may be extended to 15 volts or 30 volts with a series
dropping resistor. Maximum elevation for + or – power
lead is 60 V with respect to oscilloscope chassis ground.
Temperature
The same operating and nonoperating range as the
oscilloscope without Option 7.
SAFETY CONSIDERATIONS
Option 7 becomes a part of the modified instrument.
The safety considerations for the unmodified instrument
apply.
FUNCTION OF CONTROLS AND
CONNECTORS
Mode Switch
1
AC
Applies ac power to the oscilloscope power
switch.
1
Be sure that the 1106 Line Selector switch is set to the correct line
voltage for proper battery charging.
DC 12
DC 24
Permits 12 V operation of the instrument from
an external 12 V source.
Permits 24 V operation of the instrument from
either an external 24 V power source or from
the 1106 Power Supply, which may be
mechanically attached to the oscilloscope.
Dc Input Connector
Option 7 mode switch and dc input connector are
located on the modified oscilloscope.
OPERATION AND INSPECTION
Set the oscilloscope and Option 7 for the power source
available as listed below.
Oscilloscope
Option 7
Power Source Line Selector Mode Switch
115 V AC
115
AC
230 V AC
230
AC
12 V DC
12
24 V DC
24
1106
1
24
Turn the oscilloscope on. Check that the oscilloscope
operates properly on any of the listed power sources that
may be available.
Connect the oscilloscope frame to a ground (earth)
reference before using.
CIRCUIT DESCRIPTION
Option 7 is a dc to ac inverter. It operates on 12 or 24 V
dc. The circuit description is for 24 V operation unless
noted otherwise. Refer to the schematic diagrams (fig.
6-2 and 6-3) throughout the detailed circuit description.
The operating frequency of the inverter is approximate-
Iy 400 Hz.
Change 1 6-2.1
To Next Page
Loading...
Need help?
General
