IQ speed in 2R2T mode

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maxim1233

Hello. I'm working with the project that I downloaded from here. This works well in 1R1T mode. When I turn on the 2R2T mode, I see that the IQ speed devided by two. What could be reason? It's vector initialization: `Hello. I'm working with the project that I downloaded from here. This works well in 1R1T mode. When I turn on the 2R2T mode, I see that the IQ speed devided by two. What could be reason? It's vector initialization: `AD9361_InitParam default_init_param = { /* Device selection */ ID_AD9361, // dev_sel /* Identification number */ 0, //id_no /* Reference Clock */ 40000000UL, //reference_clk_rate /* Base Configuration */ 1, //two_rx_two_tx_mode_enable *** adi,2rx-2tx-mode-enable 1, //one_rx_one_tx_mode_use_rx_num *** adi,1rx-1tx-mode-use-rx-num 1, //one_rx_one_tx_mode_use_tx_num *** adi,1rx-1tx-mode-use-tx-num 0, //frequency_division_duplex_mode_enable *** adi,frequency-division-duplex-mode-enable 0, //frequency_division_duplex_independent_mode_enable *** adi,frequency-division-duplex-independent-mode-enable 0, //tdd_use_dual_synth_mode_enable *** adi,tdd-use-dual-synth-mode-enable 0, //tdd_skip_vco_cal_enable *** adi,tdd-skip-vco-cal-enable 0, //tx_fastlock_delay_ns *** adi,tx-fastlock-delay-ns 0, //rx_fastlock_delay_ns *** adi,rx-fastlock-delay-ns 0, //rx_fastlock_pincontrol_enable *** adi,rx-fastlock-pincontrol-enable 0, //tx_fastlock_pincontrol_enable *** adi,tx-fastlock-pincontrol-enable 0, //external_rx_lo_enable *** adi,external-rx-lo-enable 0, //external_tx_lo_enable *** adi,external-tx-lo-enable 5, //dc_offset_tracking_update_event_mask *** adi,dc-offset-tracking-update-event-mask 6, //dc_offset_attenuation_high_range *** adi,dc-offset-attenuation-high-range 5, //dc_offset_attenuation_low_range *** adi,dc-offset-attenuation-low-range 0x28, //dc_offset_count_high_range *** adi,dc-offset-count-high-range 0x32, //dc_offset_count_low_range *** adi,dc-offset-count-low-range 0, //split_gain_table_mode_enable *** adi,split-gain-table-mode-enable MAX_SYNTH_FREF, //trx_synthesizer_target_fref_overwrite_hz *** adi,trx-synthesizer-target-fref-overwrite-hz 0, // qec_tracking_slow_mode_enable *** adi,qec-tracking-slow-mode-enable /* ENSM Control */ 0, //ensm_enable_pin_pulse_mode_enable *** adi,ensm-enable-pin-pulse-mode-enable 0, //ensm_enable_txnrx_control_enable *** adi,ensm-enable-txnrx-control-enable /* LO Control */ 2300000000UL, //rx_synthesizer_frequency_hz *** adi,rx-synthesizer-frequency-hz 2300000000UL, //tx_synthesizer_frequency_hz *** adi,tx-synthesizer-frequency-hz 1, //tx_lo_powerdown_managed_enable *** adi,tx-lo-powerdown-managed-enable /* Rate & BW Control */ {896000000, 224000000, 112000000, 112000000, 56000000, 56000000},// rx_path_clock_frequencies[6] *** adi,rx-path-clock-frequencies {896000000, 224000000, 112000000, 112000000, 56000000, 56000000},// rx_path_clock_frequencies[6] *** adi,rx-path-clock-frequencies 56000000,//rf_rx_bandwidth_hz *** adi,rf-rx-bandwidth-hz 56000000,//rf_tx_bandwidth_hz *** adi,rf-tx-bandwidth-hz /* RF Port Control */ 0, //rx_rf_port_input_select *** adi,rx-rf-port-input-select 0, //tx_rf_port_input_select *** adi,tx-rf-port-input-select /* TX Attenuation Control */ 5000, //tx_attenuation_mdB *** adi,tx-attenuation-mdB 0, //update_tx_gain_in_alert_enable *** adi,update-tx-gain-in-alert-enable /* Reference Clock Control */ 0, //xo_disable_use_ext_refclk_enable *** adi,xo-disable-use-ext-refclk-enable {8, 5920}, //dcxo_coarse_and_fine_tune[2] *** adi,dcxo-coarse-and-fine-tune CLKOUT_DISABLE, //clk_output_mode_select *** adi,clk-output-mode-select /* Gain Control */ 2, //gc_rx1_mode *** adi,gc-rx1-mode 2, //gc_rx2_mode *** adi,gc-rx2-mode 58, //gc_adc_large_overload_thresh *** adi,gc-adc-large-overload-thresh 4, //gc_adc_ovr_sample_size *** adi,gc-adc-ovr-sample-size 47, //gc_adc_small_overload_thresh *** adi,gc-adc-small-overload-thresh 8192, //gc_dec_pow_measurement_duration *** adi,gc-dec-pow-measurement-duration 0, //gc_dig_gain_enable *** adi,gc-dig-gain-enable 800, //gc_lmt_overload_high_thresh *** adi,gc-lmt-overload-high-thresh 704, //gc_lmt_overload_low_thresh *** adi,gc-lmt-overload-low-thresh 24, //gc_low_power_thresh *** adi,gc-low-power-thresh 15, //gc_max_dig_gain *** adi,gc-max-dig-gain /* Gain MGC Control */ 0, //mgc_dec_gain_step *** adi,mgc-dec-gain-step 0, //mgc_inc_gain_step *** adi,mgc-inc-gain-step 0, //mgc_rx1_ctrl_inp_enable *** adi,mgc-rx1-ctrl-inp-enable 0, //mgc_rx2_ctrl_inp_enable *** adi,mgc-rx2-ctrl-inp-enable 0, //mgc_split_table_ctrl_inp_gain_mode *** adi,mgc-split-table-ctrl-inp-gain-mode /* Gain AGC Control */ 10, //agc_adc_large_overload_exceed_counter *** adi,agc-adc-large-overload-exceed-counter 2, //agc_adc_large_overload_inc_steps *** adi,agc-adc-large-overload-inc-steps 0, //agc_adc_lmt_small_overload_prevent_gain_inc_enable *** adi,agc-adc-lmt-small-overload-prevent-gain-inc-enable 10, //agc_adc_small_overload_exceed_counter *** adi,agc-adc-small-overload-exceed-counter 4, //agc_dig_gain_step_size *** adi,agc-dig-gain-step-size 3, //agc_dig_saturation_exceed_counter *** adi,agc-dig-saturation-exceed-counter 1000, // agc_gain_update_interval_us *** adi,agc-gain-update-interval-us 0, //agc_immed_gain_change_if_large_adc_overload_enable *** adi,agc-immed-gain-change-if-large-adc-overload-enable 0, //agc_immed_gain_change_if_large_lmt_overload_enable *** adi,agc-immed-gain-change-if-large-lmt-overload-enable 10, //agc_inner_thresh_high *** adi,agc-inner-thresh-high 1, //agc_inner_thresh_high_dec_steps *** adi,agc-inner-thresh-high-dec-steps 12, //agc_inner_thresh_low *** adi,agc-inner-thresh-low 1, //agc_inner_thresh_low_inc_steps *** adi,agc-inner-thresh-low-inc-steps 10, //agc_lmt_overload_large_exceed_counter *** adi,agc-lmt-overload-large-exceed-counter 2, //agc_lmt_overload_large_inc_steps *** adi,agc-lmt-overload-large-inc-steps 10, //agc_lmt_overload_small_exceed_counter *** adi,agc-lmt-overload-small-exceed-counter 5, //agc_outer_thresh_high *** adi,agc-outer-thresh-high 2, //agc_outer_thresh_high_dec_steps *** adi,agc-outer-thresh-high-dec-steps 18, //agc_outer_thresh_low *** adi,agc-outer-thresh-low 2, //agc_outer_thresh_low_inc_steps *** adi,agc-outer-thresh-low-inc-steps 1, //agc_attack_delay_extra_margin_us; *** adi,agc-attack-delay-extra-margin-us 0, //agc_sync_for_gain_counter_enable *** adi,agc-sync-for-gain-counter-enable /* Fast AGC */ 64, //fagc_dec_pow_measuremnt_duration *** adi,fagc-dec-pow-measurement-duration 260, //fagc_state_wait_time_ns *** adi,fagc-state-wait-time-ns /* Fast AGC - Low Power */ 0, //fagc_allow_agc_gain_increase *** adi,fagc-allow-agc-gain-increase-enable 5, //fagc_lp_thresh_increment_time *** adi,fagc-lp-thresh-increment-time 1, //fagc_lp_thresh_increment_steps *** adi,fagc-lp-thresh-increment-steps /* Fast AGC - Lock Level (Lock Level is set via slow AGC inner high threshold) */ 1, //fagc_lock_level_lmt_gain_increase_en *** adi,fagc-lock-level-lmt-gain-increase-enable 5, //fagc_lock_level_gain_increase_upper_limit *** adi,fagc-lock-level-gain-increase-upper-limit /* Fast AGC - Peak Detectors and Final Settling */ 1, //fagc_lpf_final_settling_steps *** adi,fagc-lpf-final-settling-steps 1, //fagc_lmt_final_settling_steps *** adi,fagc-lmt-final-settling-steps 3, //fagc_final_overrange_count *** adi,fagc-final-overrange-count /* Fast AGC - Final Power Test */ 0, //fagc_gain_increase_after_gain_lock_en *** adi,fagc-gain-increase-after-gain-lock-enable /* Fast AGC - Unlocking the Gain */ 0, //fagc_gain_index_type_after_exit_rx_mode *** adi,fagc-gain-index-type-after-exit-rx-mode 1, //fagc_use_last_lock_level_for_set_gain_en *** adi,fagc-use-last-lock-level-for-set-gain-enable 1, //fagc_rst_gla_stronger_sig_thresh_exceeded_en *** adi,fagc-rst-gla-stronger-sig-thresh-exceeded-enable 5, //fagc_optimized_gain_offset *** adi,fagc-optimized-gain-offset 10, //fagc_rst_gla_stronger_sig_thresh_above_ll *** adi,fagc-rst-gla-stronger-sig-thresh-above-ll 1, //fagc_rst_gla_engergy_lost_sig_thresh_exceeded_en *** adi,fagc-rst-gla-engergy-lost-sig-thresh-exceeded-enable 1, //fagc_rst_gla_engergy_lost_goto_optim_gain_en *** adi,fagc-rst-gla-engergy-lost-goto-optim-gain-enable 10, //fagc_rst_gla_engergy_lost_sig_thresh_below_ll *** adi,fagc-rst-gla-engergy-lost-sig-thresh-below-ll 8, //fagc_energy_lost_stronger_sig_gain_lock_exit_cnt *** adi,fagc-energy-lost-stronger-sig-gain-lock-exit-cnt 1, //fagc_rst_gla_large_adc_overload_en *** adi,fagc-rst-gla-large-adc-overload-enable 1, //fagc_rst_gla_large_lmt_overload_en *** adi,fagc-rst-gla-large-lmt-overload-enable 0, //fagc_rst_gla_en_agc_pulled_high_en *** adi,fagc-rst-gla-en-agc-pulled-high-enable 0, //fagc_rst_gla_if_en_agc_pulled_high_mode *** adi,fagc-rst-gla-if-en-agc-pulled-high-mode 64, //fagc_power_measurement_duration_in_state5 *** adi,fagc-power-measurement-duration-in-state5 /* RSSI Control */ 1, //rssi_delay *** adi,rssi-delay 1000, //rssi_duration *** adi,rssi-duration 3, //rssi_restart_mode *** adi,rssi-restart-mode 0, //rssi_unit_is_rx_samples_enable *** adi,rssi-unit-is-rx-samples-enable 1, //rssi_wait *** adi,rssi-wait /* Aux ADC Control */ 256, //aux_adc_decimation *** adi,aux-adc-decimation 40000000UL, //aux_adc_rate *** adi,aux-adc-rate /* AuxDAC Control */ 1, //aux_dac_manual_mode_enable *** adi,aux-dac-manual-mode-enable 0, //aux_dac1_default_value_mV *** adi,aux-dac1-default-value-mV 0, //aux_dac1_active_in_rx_enable *** adi,aux-dac1-active-in-rx-enable 0, //aux_dac1_active_in_tx_enable *** adi,aux-dac1-active-in-tx-enable 0, //aux_dac1_active_in_alert_enable *** adi,aux-dac1-active-in-alert-enable 0, //aux_dac1_rx_delay_us *** adi,aux-dac1-rx-delay-us 0, //aux_dac1_tx_delay_us *** adi,aux-dac1-tx-delay-us 0, //aux_dac2_default_value_mV *** adi,aux-dac2-default-value-mV 0, //aux_dac2_active_in_rx_enable *** adi,aux-dac2-active-in-rx-enable 0, //aux_dac2_active_in_tx_enable *** adi,aux-dac2-active-in-tx-enable 0, //aux_dac2_active_in_alert_enable *** adi,aux-dac2-active-in-alert-enable 0, //aux_dac2_rx_delay_us *** adi,aux-dac2-rx-delay-us 0, //aux_dac2_tx_delay_us *** adi,aux-dac2-tx-delay-us /* Temperature Sensor Control */ 256, //temp_sense_decimation *** adi,temp-sense-decimation 1000, //temp_sense_measurement_interval_ms *** adi,temp-sense-measurement-interval-ms 0xCE, //temp_sense_offset_signed *** adi,temp-sense-offset-signed 1, //temp_sense_periodic_measurement_enable *** adi,temp-sense-periodic-measurement-enable /* Control Out Setup */ 0xFF, //ctrl_outs_enable_mask *** adi,ctrl-outs-enable-mask 0, //ctrl_outs_index *** adi,ctrl-outs-index /* External LNA Control */ 0, //elna_settling_delay_ns *** adi,elna-settling-delay-ns 0, //elna_gain_mdB *** adi,elna-gain-mdB 0, //elna_bypass_loss_mdB *** adi,elna-bypass-loss-mdB 0, //elna_rx1_gpo0_control_enable *** adi,elna-rx1-gpo0-control-enable 0, //elna_rx2_gpo1_control_enable *** adi,elna-rx2-gpo1-control-enable 0, //elna_gaintable_all_index_enable *** adi,elna-gaintable-all-index-enable /* Digital Interface Control */ 0, //digital_interface_tune_skip_mode *** adi,digital-interface-tune-skip-mode 0, //digital_interface_tune_fir_disable *** adi,digital-interface-tune-fir-disable 1, //pp_tx_swap_enable *** adi,pp-tx-swap-enable 1, //pp_rx_swap_enable *** adi,pp-rx-swap-enable 0, //tx_channel_swap_enable *** adi,tx-channel-swap-enable 0, //rx_channel_swap_enable *** adi,rx-channel-swap-enable 1, //rx_frame_pulse_mode_enable *** adi,rx-frame-pulse-mode-enable 0, //two_t_two_r_timing_enable *** adi,2t2r-timing-enable 0, //invert_data_bus_enable *** adi,invert-data-bus-enable 0, //invert_data_clk_enable *** adi,invert-data-clk-enable 0, //fdd_alt_word_order_enable *** adi,fdd-alt-word-order-enable 0, //invert_rx_frame_enable *** adi,invert-rx-frame-enable 0, //fdd_rx_rate_2tx_enable *** adi,fdd-rx-rate-2tx-enable 0, //swap_ports_enable *** adi,swap-ports-enable 0, //single_data_rate_enable *** adi,single-data-rate-enable 1, //lvds_mode_enable *** adi,lvds-mode-enable 0, //half_duplex_mode_enable *** adi,half-duplex-mode-enable 0, //single_port_mode_enable *** adi,single-port-mode-enable 0, //full_port_enable *** adi,full-port-enable 0, //full_duplex_swap_bits_enable *** adi,full-duplex-swap-bits-enable 0, //delay_rx_data *** adi,delay-rx-data 0, //rx_data_clock_delay *** adi,rx-data-clock-delay 4, //rx_data_delay *** adi,rx-data-delay 7, //tx_fb_clock_delay *** adi,tx-fb-clock-delay 0, //tx_data_delay *** adi,tx-data-delay #ifdef ALTERA_PLATFORM 300, //lvds_bias_mV *** adi,lvds-bias-mV #else 150, //lvds_bias_mV *** adi,lvds-bias-mV #endif 1, //lvds_rx_onchip_termination_enable *** adi,lvds-rx-onchip-termination-enable 0, //rx1rx2_phase_inversion_en *** adi,rx1-rx2-phase-inversion-enable 0xFF, //lvds_invert1_control *** adi,lvds-invert1-control 0x0F, //lvds_invert2_control *** adi,lvds-invert2-control /* GPO Control */ 0, //gpo0_inactive_state_high_enable *** adi,gpo0-inactive-state-high-enable 0, //gpo1_inactive_state_high_enable *** adi,gpo1-inactive-state-high-enable 0, //gpo2_inactive_state_high_enable *** adi,gpo2-inactive-state-high-enable 0, //gpo3_inactive_state_high_enable *** adi,gpo3-inactive-state-high-enable 0, //gpo0_slave_rx_enable *** adi,gpo0-slave-rx-enable 0, //gpo0_slave_tx_enable *** adi,gpo0-slave-tx-enable 0, //gpo1_slave_rx_enable *** adi,gpo1-slave-rx-enable 0, //gpo1_slave_tx_enable *** adi,gpo1-slave-tx-enable 0, //gpo2_slave_rx_enable *** adi,gpo2-slave-rx-enable 0, //gpo2_slave_tx_enable *** adi,gpo2-slave-tx-enable 0, //gpo3_slave_rx_enable *** adi,gpo3-slave-rx-enable 0, //gpo3_slave_tx_enable *** adi,gpo3-slave-tx-enable 0, //gpo0_rx_delay_us *** adi,gpo0-rx-delay-us 0, //gpo0_tx_delay_us *** adi,gpo0-tx-delay-us 0, //gpo1_rx_delay_us *** adi,gpo1-rx-delay-us 0, //gpo1_tx_delay_us *** adi,gpo1-tx-delay-us 0, //gpo2_rx_delay_us *** adi,gpo2-rx-delay-us 0, //gpo2_tx_delay_us *** adi,gpo2-tx-delay-us 0, //gpo3_rx_delay_us *** adi,gpo3-rx-delay-us 0, //gpo3_tx_delay_us *** adi,gpo3-tx-delay-us /* Tx Monitor Control */ 37000, //low_high_gain_threshold_mdB *** adi,txmon-low-high-thresh 0, //low_gain_dB *** adi,txmon-low-gain 24, //high_gain_dB *** adi,txmon-high-gain 0, //tx_mon_track_en *** adi,txmon-dc-tracking-enable 0, //one_shot_mode_en *** adi,txmon-one-shot-mode-enable 511, //tx_mon_delay *** adi,txmon-delay 8192, //tx_mon_duration *** adi,txmon-duration 2, //tx1_mon_front_end_gain *** adi,txmon-1-front-end-gain 2, //tx2_mon_front_end_gain *** adi,txmon-2-front-end-gain 48, //tx1_mon_lo_cm *** adi,txmon-1-lo-cm 48, //tx2_mon_lo_cm *** adi,txmon-2-lo-cm /* GPIO definitions */ -1, //gpio_resetb *** reset-gpios /* MCS Sync */ -1, //gpio_sync *** sync-gpios -1, //gpio_cal_sw1 *** cal-sw1-gpios -1, //gpio_cal_sw2 *** cal-sw2-gpios /* External LO clocks */ NULL, //(*ad9361_rfpll_ext_recalc_rate)() NULL, //(*ad9361_rfpll_ext_round_rate)() NULL //(*ad9361_rfpll_ext_set_rate)() };``

Comments

black-pigeon

Hi, you need to understand the sampling rate and the baseband clock output of the AD9361. Under the LVDS interface, in the 1R1T mode, the baseband clock is twice the sampling rate, and in the 2R2T mode, the baseband clock is four times the sampling rate.