Sweeping; Sweeping Considerations; Sweeping Using Start And Stop Frequencies - HP E1340A User Manual

Sweeping

Sweeping
Considerations
Sweeping Using
Start and Stop
Frequencies
85 HP E1340A Sweeping and Frequency-Shift Keying
The AFG offers linear frequency sweeping of standard waveforms
(i.e. sine, square, triangle, ramp) and arbitrary waveforms from 0.0 Hz to
15 MHz for sine waves, and 0.0 Hz to 1 MHz for square, triangle, and ramp
waves.
The command subsystems covered in this section include:
[SOURce:]ROSCillator
[SOURce:]FREQuency
[SOURce:]SWEep
The AFG only allows for continuous repetitive sweeping. The
command starts the sweeping at a fixed rate determined by the
[:IMMediate]
number of points in the sweep and the sweep time. For more information on
sweeping, see Chapter 7 under the
The following program specifies a start frequency and a stop frequency and
continuously sweeps between 0 and 1 MHz. The program also queries the
start frequency, stop frequency, center frequency, and frequency span to
show the relationship between them.
Using the flowchart as a guide, the steps of this program are:
1. Select the Reference Oscillator -
[SOURce:]ROSCillator:SOURce <
2. Select the Frequency Sweep Mode -
[SOURce:]FREQuency:MODE SWEep
3. Set the Start Frequency -
[SOURce:]FREQuency:STARt <
4. Set the Stop Frequency -
[SOURce:]FREQuency:STOP <
5. Select the Output Function -
[SOURce:]FUNCtion[:SHAPe] <
6. Set the Signal Amplitude -
[SOURce:]VOLTage[:LEVel][:IMMediate][:AMPLitude] <
7. Place the AFG in the Wait-for-arm State -
INITiate[:IMMediate]
[SOURce:]SWEep subsystem.
source >
start_freq >
stop_freq
>
shape
>
INITiate
amplitude
>
Chapter 4