Cirrus Logic CDB43131-GBK, Руководство пользователя

Страница: 35 / 60

CDB43131-GBK
DS1155V2DB1 35
5.5.4.5.3 Measuring AC Impedance Across a Range of Frequencies
The following steps show how to measure AC impedance across a range of frequencies. A headphone should be
connected to headphone jack J1 on the CDB43131 to do the measurement. DC impedance should be measured before
measuring AC impedance. When the "Start" button is clicked, a
logarithmic sweep from Start to Stop Frequency,
controlled by the value of “# of points", will begin. The measured values will be plotted on the graph in real-time. W
hile the
sweep is in progress, the “Start” button will change to “Abort” button. By clicking on the “Abort” button, the user can abort
the AC Impedance Sweep process. When measurement is complete, “Abort” will revert back to “Start”
1. Enable frequency sweep by checking Sweep check box. This will load AC frequency sweep controls.
2. Enter the "Start Frequency", "Stop Frequency" and the "# of Points".
3. Click the "Start" button next to "Left Channel" to start AC impedance sweep for left channel and real time plotting.
4. Click the "Start" button next to "Right Channel" to start AC impedance sweep for right channel and real time
plotting.
5. To save left channel sweep data, click "Save Left CH Data" button. An explorer dialog will open, and the user can
save channel impedance data and the corresponding frequency as a .CSV file at desired location
6. To save right channel sweep data, click "Save Right CH Data" button. An explorer dialog will open, and the user
can save channel impedance data and the corresponding frequency as a .CSV file at desired location
7. Save the graph as a .PNG file by clicking on the Save Image button. An explorer dialog box will open to allow the
user to save the image at the desired location.
Figure 35 AC Impedance Sweep for Shure SE535 Headphone