The TDOA Application used with the Vision Simulator Program provides a user screen with the tools to simulate a tracked stationary or a mobile interferer signal as shown in Figure: TDOA Application With Simulator Program.
TDOA Application With Simulator Program
1. TDOA Application Graphic User Interface
2. Vision Simulator Program Graphic User Interface
3. Corresponding Probes
4. Emitter Tracking
Callout (4) shows the Simulator’s emitter position between the A, B, and E probes in the lower image and the TDOA Application’s triangulated TDOA measurement of the signal in the upper image. The URL Hostname is the communication link between the TDOA Application and the Simulator. In this example, to make this measurement, set up the TDOA Application as follows:
• TDOA Probe 2 with the URL Hostname 127.0.0.1.9001 links Simulator port 9001 – map position A.
• TDOA Probe 3 with the URL Hostname 127.0.0.1.9002 links Simulator port 9002 – map position B.
• TDOA Probe 1 with the URL Hostname 127.0.0.1.9005 links Simulator port 9005 – map position E.
With the Simulator loaded with probes 9001, 9002, 9005, click Start and the TDOA Application communicates to the three Simulator probes and performs TDOA measurements.
In the Simulator example, any set of probes can be monitored, but the monitored probes need to be positioned in a triangular pattern in order to perform a TDOA measurement.
If the target is mobile and moves past probe A, B, and E, the next set of probes that would capture the signal would be B, C and F. To make this measurement, enter the following Hostnames into the TDOA Application.
• TDOA Probe 2 with the URL Hostname 127.0.0.1.9003 links to Simulator port 9003 – map position C
• TDOA Probe 3 with the URL Hostname 127.0.0.1.9002 links to Simulator port 9002 – map position B
• TDOA Probe 1 with the URL Hostname 127.0.0.1.9006 links to Simulator port 9006 – map position F
From the TDOA toolbar, click Report to generate the Anritsu Vision - TDOA report as shown in Figure: TDOA Report.
Probe 1, Probe 2, Probe 3 Latitude and Longitude settings in the TDOA report are in Degrees, Minutes and Seconds (D.M.S) and the corresponding settings in the Simulator are in Decimal.
Note
The TDOA report’s Bit Resolution is set at 16 bits and the Capture Length is set to 10 ms. These are preset and are not adjustable settings from the TDOA Application or the Simulator Program.
