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TM 11-6625-1589-15-1
3-10 .
SYNCHRONIZATION .
3-11 .
To synchronize the Model 204C connect a signal to the SYNC terminal on the
front panel.
An input signal of 5 volts rms may vary as much as = 7 % in frequency
and still synchronize the output at set frequency .
3-12 .
The SYNC terminal also provides an output sync voltage of 1.7 volts rms at
the same frequency as the Model 204C output.
THE MODEL 204C CAN BE SYNCHRONIZED TO ANY SIGNIFICANT HARMONIC
OF AN EXTERNAL SIGNAL ,
HOWEVER , IF A NON - SINUSOIDAL WAVEFORM IS USED
TO SYNCHRONIZE THE MODEL 2040 ,
SOME PORTION OF THE EXTERNAL SYNC SIGNAL
WILL BE FED TO THE OUTPUT . THIS SMALL SIGNAL WILL APPEAR AS DISTORTION .
THE AMOUNT OF THIS EXTERNAL DISTORTION WILL BE DIRECTLY PROPORTIONAL TO
THE AMPLITUDE OF THE SYNC SIGNAL . FOR A NON - SINUSOIDAL SYNC INPUT OF
2 VOLTS PEAK - TO - PEAK , THE DISTORTION WILL BE DOWN ABOUT - 45 DB FOR FRE
QUENCIES WHICH ARE NORMALLY DOWN - 60 DB .
3-2
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