Agilent Technologies Agilent 33500 Series, User Manual

Page: 146 / 278

145
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  Hz to 30 MHz (limited to 300 kHz for ramps).
The default is 550 Hz .
• Frequency span: -30  Hz to 30 MHz (limited to 300 kHz for ramps).
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 and then
press
Start/Stop
to toggle to the
Cntr/Span
softkey. Then use the
knob or numeric keypad to enter the desired values.
• Remote Interface Operation :
[SOURce[1|2]:]FREQuency:CENTer
{<
frequency
>|MINimum|MAXimum}
[SOURce[1|2]:]FREQuency:SPAN
{<
frequency
>|MINimum|MAXimum}