Good Evening,
I am working with an FMCOMMS5 EBZ rev c using no-os, and I have a few questions about the ad9361_set_rx_rf_port_input function. The input mode options are A_BALANCED, B_BALANCED, C_BALANCED, etc. My FMCOMMS5 board only has 4 physical rx ports (RX1A_A, RX2A_A, RX1A_B, RX2A_B). A picture of my board is shown below.
I have DDS tones transmitting out of all 4 tx ports with cable loopback into the 4 rx ports (not shown in pic). A_BALANCED is the only mode where I have all 4 tones hitting my ADCs. B_BALANCED and C_BALANCED modes do not receive any tones on any rx channels.
Would B_BALANCED mode be for the 4 rx labels with missing ports (i.e. RX1B_A, RX2B_A, RX1B_B, RX2B_B) beside the tx_mon diagonal ports? To me, that would explain why I am not seeing anything.
If that is the case, which ports correspond to C_BALANCED mode?
How would not having C_BALANCED mode affect the functionality of ad9361_fmcomms5_phase_sync.c, specifically in the configure_ports function where, at a lower level, the ad9361_set_rx_rf_port_input function is used to configure to C_BALANCED mode?
Here is the reference for the ad9361_set_rx_rf_port_input function.
/**
* Set the RX RF input port.
* @param phy The AD9361 current state structure.
* @param mode The RF port.
* Accepted values:
* A_BALANCED (0 - (RX1A_N & RX1A_P) and (RX2A_N & RX2A_P) enabled; balanced)
* B_BALANCED (1 - (RX1B_N & RX1B_P) and (RX2B_N & RX2B_P) enabled; balanced)
* C_BALANCED (2 - (RX1C_N & RX1C_P) and (RX2C_N & RX2C_P) enabled; balanced)
* A_N (3 - RX1A_N and RX2A_N enabled; unbalanced)
* A_P (4 - RX1A_P and RX2A_P enabled; unbalanced)
* B_N (5 - RX1B_N and RX2B_N enabled; unbalanced)
* B_P (6 - RX1B_P and RX2B_P enabled; unbalanced)
* C_N (7 - RX1C_N and RX2C_N enabled; unbalanced)
* C_P (8 - RX1C_P and RX2C_P enabled; unbalanced)
* TX_MON1 (9 - TX_MONITOR1)
* TX_MON2 (10 - TX_MONITOR2)
* TX_MON1_2 (11 - TX_MONITOR1 & TX_MONITOR2)
* @return 0 in case of success, negative error code otherwise.
*/
Thanks,
Scott
