Loop Analysis

Modified on Fri, 19 Apr at 12:09 PM

In the Tools section of the Timing app, there is a screen to check the performance of your loop(s) over a selected time frame. This can be used to check for interference or periods of outage from the loop. Click the Tool box module on the left and the select Loop analysis from the tab at the top.

Select a date and time range you would like to analyse and then click "LOAD". After the data has loaded, select a loop to analyse and click view. You will then see a graph detailing the selected time frame.

The triangles will indicate a passing detection of a transponder, colour coded to the type of transponder (if known). Hover over a triangle data point to see which transponder it is referring to.

The turquoise line indicates the level of noise on the loop (measured in -db).

In the example above, you can see that the loop experience a lot of noise around 14:57 (A) which points to some kind of interference with the loop. Then moments later the noise drops to zero (B - see image below). This is relatively unlikely as there is always a small amount of interference with the loop as can be seen prior to 14:56 where it averaged -15db of noise.

After 15:00 we see the noise jump back up again to over 100. When the noise level of the loop is higher than the noise emitted by the transponders, the loop will likely not pick up the transponder passing. You can see several passings that are below the noise line of the loop in the below image (C).

The loop noise then starts to settle down after 15:05 (D) averaging about -20db.

For Rental karts with the long life battery transponders, your loop also have an activator with it. If you are getting the correct noise levels but the transponders are not picking up, check that your activator (which may look like the image below) is on and correctly fitted with the loop.

Note: For MyLaps and AMB decoders, if the noise is 0 that means there is no signal, which is very unlikely as there is always a small amount if interreference. If the noise is 284 this means that there is no loop cable attached.