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Chapter 3 Features and Functions
Frequency Sweep
3
Start Frequency and Stop Frequency
The start frequency and stop frequency set the upper and lower frequency
bounds for the sweep. The function generator begins at the start frequenc
y,
sweeps to the stop frequency, and then resets back to the start frequency.
• Start and Stop frequencies:
1
µ
Hz to 80 MHz
(limited to 1 MHz for
ramps and 25 MHz for arbitrary waveforms). The sweep is phase
continuous over the full frequency range. The default start frequency
is 100 Hz. The default stop frequency is 1 kHz.
•To sweep up in frequency, set the start frequency < stop frequency.
To sweep
down
in frequency, set the start frequency
>
stop frequency.
•For sweeps with Marker Off, the Sync signal is a square waveform
with a 50% duty cycle. The Sync signal is a TTL “high” at the
beginning of the sweep and goes “low” at the midpoint of the sweep.
The frequency of the sync waveform is equal to the specified sweep
time. The signal is output from the front-panel Sync connector.
•For sweeps with Marker On, the Sync signal is a TTL “high” at the
beginning of the sweep and goes “low” at the marker frequency.
The signal is output from the front-panel Sync connector.
• Front-Panel Operation: After enabling sweeps, press the Start or
Stop softkey. Then use the knob or numeric keypad to enter the
desired frequency.
• Remote Interface Operation:
FREQuency:STARt {<frequency>|MINimum|MAXimum}
FREQuency:STOP {<frequency>|MINimum|MAXimum}
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