Connection

Figure 1.

Figure 1.

When you first receive Aeroscope, press the button or plug it into a charger to take it out of factory ship mode.

To connect to your Aeroscope, press the connection button in the lower right corner. The connection menu will pop open and display all of the Aeroscopes that are available to connect to. Select an Aeroscope and the menu will indicate when the device has connected as shown in Figure 1 above. Notice that once you are connected the menu displays "Connected To:" and the graphic on the connection button changes. From this connection menu you can also change the name of your Aeroscope by tapping "Edit Name," or disconnect from the currently connected device by tapping "Disconnect."

After you have connected your device to Aeroscope once the app will automatically connect to the same Aeroscope whenever it is opened. If you press the "Disconnect" button in the connection menu the app will no longer automatically connect.

Aeroscope will go into a low power mode when it loses connection to the device, i.e. the app is either closed or back-grounded. There is no need to manually turn Aeroscope off.


Aeroscope_input_gnd.jpg

Calibration

 

You need to calibrate Aeroscope on first use and periodically as the environment changes. Simply ground the input and press the "Calibrate" button under the settings menu. For more details, see our calibration page.


Control

Figure 2.

Figure 2.

Once you are connected, you can control Aeroscope in a number of ways. You can use the buttons on the right side of the screen to change the time and voltage scales, the offset, the trigger mode, or to add measurements. You can also use touch gestures to control Aeroscope. Pinch gestures in the horizontal direction change the time scale, and in the vertical direction direction change the voltage scale. A single finger drag in the horizontal direction will change the trigger delay or in the vertical direction will change the offset. The currently set voltage and time scales are shown on the buttons as well as in the upper left corner just above the plot area. The current input coupling, AC or DC, is also shown in the upper left corner just above the plot area.

Aeroscope can be set to run, stop, or single mode by tapping the buttons on the upper right side of the screen. The button on Aeroscope itself can also be used to start or stop acquisition. This is especially handy when you are probing and get a waveform that you would like to look at in more detail. With a traditional oscilloscope you would have to reach across the bench to push the stop button. Often times it is precisely at this moment that the probe slips and you lose your waveform, with Aeroscope’s start/stop button literally at your fingertip this problem is avoided.


Trigger

Figure 3.

Figure 3.

Aeroscope’s full memory is represented by the strip view at the top of the screen, as shown in Figure 2 above. The portion of memory that is currently being displayed on screen is represented by the rectangle in the strip view, called "memory window" in Figure 2. You can move the location of the memory window by dragging your finger in the plot area or by dragging your finger on the memory window in the strip view. This allows you to view data at various points in time relative to the trigger point. The trigger location in time is represented by the red carrots in both the strip view and the plot area, annotated as “horizontal trigger." If the trigger location is outside of the current memory window, the time delay to the trigger is shown in either the upper left or upper right corner of the plot area. The delay will be shown in the upper left if the data being viewed is after the trigger event or shown in the upper right if the data being viewed is before the trigger event. An example of data being viewed after a trigger event is shown above in Figure 3. The trigger location in time can be set to three different points as represented by the three carrots in the strip view. The three locations are 10%, 50%, or 90% of the total capture memory.

Aeroscope’s trigger voltage is set by moving the slider on the right edge of the plot area. The trigger mode is set by tapping the trigger button. The mode can be set to trigger on a rising, falling, or any edge. Aeroscope’s auto trigger can also be enabled or disabled from this trigger menu.

Aeroscope comes equipped with a noise reject trigger that can be enabled or disabled from the trigger menu (by tapping the “NR” button). This trigger filter can be used to help you get a stable trigger on noisy signals. It ignores any edges that don’t have at least four samples prior to the trigger event that are below the trigger voltage and four samples after the trigger event that are above the trigger voltage (or vice versa for falling edge triggers). When viewing a noisy signal without this trigger it is much more likely that the oscilloscope will trigger on the signal noise instead of the underlying signal. Since the noise is random it will make the captured signal appear to randomly trigger and be difficult to observe.


Full Frame D/L

Figure 4.

Figure 4.

 

Under the "Settings" button you'll find an option to turn on "Full Frame D/L". This option is used to browse the contents of the entire memory, all 4096 samples, in stop mode. Under normal operation Aeroscope will write more memory than is read. Generally, Aeroscope will write all 4096 samples to its memory buffer but only send 500 samples over the Bluetooth link. For all but the slowest time scales, writing is very fast compared to reading. For most settings, the latency experienced by the user is unchanged if we write 500 samples to memory versus 4096 samples to memory. However, the latency is noticeably worse if we read 4096 samples versus 500 samples. The full frame download feature is used to download all of the memory whenever Aeroscope goes into stop mode.

This feature is very useful in single shot mode. When capturing a single shot waveform with full frame download enabled, Aeroscope will quickly send over the 500 samples that are displayed on screen and then send over the rest of the capture memory. You can see how much of the capture memory has been sent over by watching the strip view. In Figure 3 above, you can see that the waveform in the strip view is only present in the current memory window. Compare that to Figure 4 where the entire memory has been downloaded and the entire strip view is filled with waveform data.