I want to measure the receiver bit error rate (BER) of the ADF7024. For this I need access to the ADF7024 receive data and receive clock. Are these signals available on the GP pins?
For the purpose of receiver bit error rate measurement, the ADF7024 provides a test mode to map the receive data and the receive clock to external pins. The receive data is available on the GP0 pin, and the receive clock is available on the GP2 pin. To enable this test mode, complete the following steps:
1. Ensure that the configuration registers are configured in PHY_OFF and that the CMD_CONFIG_DEV command is issued.
2. Go to PHY_ON by issuing the CMD_PHY_ON command.
3. Set GPIO_CONFIGURE = 0xA0 (Address 0x3FA) and DATA_MODE = 1 (in register PKT_LENGTH_CONTROL, Address 0x126)
4. Go to PHY_RX by issuing the CMD_PHY_RX command. The receive data and the receive data clock are now available on the GP0 and GP2 pins, respectively. The receive data is valid on the negative edge of the receive data clock.
To return to normal operation, return to PHY_ON and set GPIO_CONFIGURE = 0x00 and DATA_MODE = 0.
Retrieving data ...