Wavetek 130 Instruction Manual page 8

Converting
to
230-Volt Line
Power
Instruments are shipped
from
the factory with the
power transformer connected
for 115-volt
line
power,
unless
ordered
for
230-volt
use.
Converting
a
1
15-volt
unit for 230-volt operation
is
a
simple matter.
1.
Remove power
cord.
2.
Loosen
two
captive
thumb
screws
on
rear panel
and remove
panel.
3.
The
conversion switch
is
located
on
the chassis.
Use
a
thin-bladed screwdriver to
move
the
115-230
switch to
the 230 position.
4.
Replace
%-ampere
fuse
with
a
1
/8-ampere fuse of
the
same
type.
Connecting
Signal
and Chassis
Grounds
The instrument
is
shipped
from
the factory
with the
signal
ground floating
above
chassis
ground, unless
otherwise specified.
A common
signal/chassis
ground
can be obtained as follows:
1
.
Remove power
cord.
2.
Loosen two
captive
thumb
screws
on
rear panel
and remove
panel.
3.
Solder
a
jumper wire
between the ground
lugs
Igreen wiresi of the
SYNC
OUT
connector and
the
power connector (Figure 2-2).
ADD POWER
JUMPER CONNECTOR
J1
Figure 2-2.
Common
Ground Connection Diagram
Converting
Output Impedance
to
600
Ohms
Unless otherwise specified,
the instrument
was
shipped
with 50
ohm
output impedance.
If
the application
calls
for a
600
ohm
output, follow these steps for
converting:
1.
Remove
and
Discard:
R165
-R166 ~R167 -R168 -R169
and C67
2.
Replace
R165
with
1000
ohms
and Jumper R166.
R167
with 1500
ohms
and
Jumper
R1
68.
(Parallel
equivalent
is
600 ohmsi
3.
Let R 169 and
C67 remain
vacant.
4.
Use
1%
resistors.
4
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