/'
signal of exactly 1000Hz is applied, the oscillator will automatically lock in at 1000Hz.
Thus, high accuracy can be achieved with the use of a precision frequency standard.
In another application, a distorted waveform can be "purified", or filtered, by passing it
through the oscillator.
EXTERNAL
SOURCE
I\.JIv
LAG-120A
Fig. 2-2
Use
of the SYNC terminals.
C.
SYNC Output Application
The sync output voltage, approximately 2.SVrms, should be sufficient to synchronize or
trigger the sweep in a scope or to operate a frequency counter. This voltage is not affected
by the setting of ATTENUATION and VARIABLE.
3
MAINTENANCE
3.1 Fuse Replacement
When replacing the AC line fuse (at
rear
of
the case), make certain that the proper rating is
used, see below:
LINE VOLT AGE
100 - llSV
200 - 230V
FUSE RATING
0.3A
0.3A
If the fuse blows after replacement,
check
the DC power supply circuits for defective
capcitors, or shorts in the supply lines.
3.2 Exposing the Chassis
The cover can be removed be unscrewing two screws at the top and
4
screws at the sides.
3.3 AC Input Connections
The primary of the power transformer is wired at the factory as specified.
Refer to Fig. 3-1 when a change is required,
-
8
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