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2) Considerations
Minimum FREQ. dial setting is recommended for most sweep generator
operation. The dial setting determines the lowest frequency of generator. The
sweep generator will sweep upward from that point. However, it will sweep
upward only to the range limit(highest frequency to which the dial can tune on the
selected range). Therefore, a low dial setting is required to obtain a sweep
covering a wide frequency range. The minimum dial setting must be used to
obtain the maximum sweep width of 100:1(highest frequency sweep is 100 times
that of lowest frequency swept).If a high dial setting and high SWEEP WIDTH
setting are used simultaneously, the generator will sweep to the range limit and
ceases operation for a portion of the sweep cycle, effectively clipping the sweep.
Of course, if only a small frequency band is to be swept, a low dial setting is not
important. In fact, it may be easier to set to the desired frequencies if the dial
setting is 0.1 or higher.
3-10. Use As Externally Controlled Sweep Generator
A ramp voltage, or any other type waveform desired, can be applied for externally
controlled sweep generator operation. 0 to 10 volt swing will sweep frequencies
over a 100:1 ratio(with dial set to minimum value) Set up the instrument as
described for internally controlled sweep generator operation, except turn the
SWEEP WIDTH control to OFF. Apply the sweep voltage with no DC component at
the VCF Input BNC. Set the FREQ. dial to the highest frequency to be swept and
apply a negative-going ramp voltage.
3-11. Use As External Frequency Counter
1) USE AS EXTERNAL FREQUENCY COUNTER
A. EXTERNAL AND INTERNAL COUNTER SELECTION
This instrument can be used as a counter by Push-in of INT/EXT
selection switch.
B. EXT COUNT IN BNC : accepts external frequency input.
C. COUNTER DISPLAY : Input frequency is displayed with high
resolution on a 6 digit LED display.
D. mHz, Hz, KHz, MHz INDICATOR: mHz, Hz, KHz, MHz indicators &
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