The XRF4-RFBB card specifications are provided in the following table:
| Parameter | Specification |
|---|---|
| TX channels | 8x |
| RX channels | 8x |
| FB channels | 2x |
| TX DAC trace length (matched) | 2.995 inches |
| RX ADC trace length (matched) | 6.245 inches |
| FB ADC trace length (matched) | 2.528 inches |
| ZCU208/670 interface | LPAM-50-01.0-L-08-2-K-TR |
| XRF4 TX card interface | LPAM-10-01.0-L-06-2-K-TR |
| XRF4 FB card interface | LPAF-10-03.0-L-06-2-K-TR |
| Kria K26 SOM interface | ADM6-60-01.5-L-4-2-A-TR |
| Connectors | 2x SMA on base board |
| 18x connections to XRF4 RF slice connectors | |
| Return loss | -12 dB @ 7 GHz |
| Insertion loss | -1.5 dB @ 7 GHz DAC channel |
| -3 dB @ 7 GHz, ADC channel | |
| Isolation | -70 dB @ 7 GHz for ADCs and DACs |
| Peripherals | RJ 45 Gigabit Ethernet |
| SD card | |
| JTAG | |
| UART (micro-USB) | |
| 2x 12V fan power | |
| External 12V power |
The following figure shows the measurement planes used to obtain typical RF
small signal data for the various paths.
Figure 1. XRF4 Baseboard Measurement Planes
The following figures show the various S-differential-to-differential (Sdd)
parameters measured for the XRF4 baseboard.
Figure 2. XRF4 Baseboard Typical Insertion Loss and Return Loss for
Receive Paths
Figure 3. XRF4 Baseboard Typical Insertion Loss and Return Loss for Feedback
Paths
Figure 4. XRF4 Baseboard Typical Insertion Loss and Return Loss for Transmit
Paths
