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Chapter 3 Features and Functions
Frequency Sweep
3
Center Frequency and Frequency Span
If desired, you can set the frequency boundaries of the sweep using a
center frequency and frequency span. These parameters are similar to the
start frequency and stop frequency (see the previous page) and are
included to give you added flexibility.
• Center frequency: 1 mH
z to 10 MHz
(limited to 100 kHz for ramp
waveforms). The default is 550 Hz.
• Frequency span: 0
Hz to 10 MHz
(limited to 100 kHz for ramp
waveforms). The default is 900 Hz.
• To sweep up in frequency, set a positive frequency span.
To sweep down in frequency, set a negative frequency span.
• 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 again to toggle to the Center or Span softkey. Then use
the knob or numeric keypad to enter the desired values.
• Remote Interface Operation:
FREQuency:CENTer {<frequency>|MINimum|MAXimum}
FREQuency:SPAN {<frequency>|MINimum|MAXimum}
33210A users guide.book Page 92 Wednesday, July 16, 2008 11:16 AM
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