Frequency Sweeps - Stanford Research Systems DS360 Operating Manual And Programming Reference

Frequency Sweeps

This section discribes how to set up a linear or logarithmic frequency sweep. The DS360 can sweep the
output frequency of sine and square waves over any range of allowable frequencies. There are no
restrictions on minimum or maximum sweep span. The sweep rate may range from 0.1Hz (10 s) to
3.1kHz (0.32 ms). Sweeps can be triggered from the internal rate generator, an external rate, the front
panel or over the computer interface. The DS360 has a TTL sweep signal BNC on the rear panel that
marks the beginning of a sweep. Connect the SWEEP OUT BNC on the rear panel of the DS360 to the
second channel of the oscilloscope and set it to 2 V/div. The oscilloscope should be set to 0.2 ms/div and
to trigger on the rising edge of this signal.
1. Press [RCL][0].
2. Press the modify function down [∨] key once.
Press the [ON/OFF] key in the MODIFY FUNC
area.
3. Press the modify function up [∧] key once.
Press the [RATE][2][kHz] keys.
Press the [START][1][0][0][Hz] keys.
Press the [STOP][1][0][kHz] keys.
4. Press the function down [∨] key.
This places the DS360 in its default state.
Set DS360 for a logarithmic, 1kHz sweep of a
sinewave.
The oscilloscope should show two periods of a 1
ms long log sweep.
Set the DS360 for a 2kHz linear sweep, with a start
frequency of 100 Hz and a stop frequency of 10
kHz.
The oscilloscope should show 4 periods of a 0.5 ms
long linear sweep.
Change the output wave form to a square wave.
The oscilloscope should show the same frequency
sweep of a squarewave.
DS360 Ultra Low Distortion Function Generator
Getting Started 1-5