91
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 mHz to 10 MHz
 (limited to 100 kHz for 
ramp 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}
33210A users guide.book  Page 91  Wednesday, July 16, 2008  11:16 AM