Performance validation involved the following steps:
- Bench-top validation of the data converters
- Bench-top validation of radio performance
- Validation of system performance
Validation of data converters and radio performance was done in collaboration with a Radiospire engineer by observing the test waveforms and the recovered data captured by a logic analyzer and processed by the Radiospire test software.
The transmit and receive units were separated by 12 to 15 feet with the couch obstructing the path between the two ends of the airlink (Figure 10).
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Figure 10: Radiospire system test setup photo.
The antenna used on the Radiospire reference design was the UWB chip antenna from Fractus SA (FR05-107). The antenna was connected via coaxial cable and was mounted on a block of foam making it easy to rotate it around and point it up or down. The cart itself was also rotated to the 0°,90°, 180°, and 270° positions (Figure 11).
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Figure 11: Video quality test was performed at 4 orientations of the cart with the transmitter rotated 0°, 90°, 180°, and 270° with respect to the receiver. The antenna itself was also rotated and pointed up or down.