Spurious @ 1720 Mhz // ad9364

Hi, 

We have a custom board that has a ad9364. We have 2017_1 libraries and we are using LVDS mode. If we are using the init parameters that are located below, there is a spurious at 1720 Mhz. Do you have any idea about this issue? 

AD9361_InitParam modem_yuksek_hiz_init_param = {
/* Device Selection */
ID_AD9364,
/* Identification number */
0, //id_no;
/* Reference Clock */
70000000UL, //reference_clk_rate
/* Base Configuration */
0, //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
1, //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
1, //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
#ifdef TUMSIS_MODEM
0, //tdd_use_fdd_vco_tables_enable *** adi,tdd-use-fdd-vco-tables-enable
#endif
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 */
1200000000UL, //rx_synthesizer_frequency_hz *** adi,rx-synthesizer-frequency-hz
1200000000UL, //tx_synthesizer_frequency_hz *** adi,tx-synthesizer-frequency-hz
/* Rate & BW Control */
{983040000, 245760000, 122880000, 61440000, 61440000, 61440000},//uint32_t rx_path_clock_frequencies[6] *** adi,rx-path-clock-frequencies
{983040000, 245760000, 122880000, 61440000, 61440000, 61440000},//uint32_t tx_path_clock_frequencies[6] *** adi,tx-path-clock-frequencies
56000000,//rf_rx_bandwidth_hz *** adi,rf-rx-bandwidth-hz
40000000,//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 */
20000, //tx_attenuation_mdB *** adi,tx-attenuation-mdB
0, //update_tx_gain_in_alert_enable *** adi,update-tx-gain-in-alert-enable
/* Reference Clock Control */
1, //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
32768, //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 */
2, //mgc_dec_gain_step *** adi,mgc-dec-gain-step
2, //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
4000, // 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
22, //agc_inner_thresh_high *** adi,agc-inner-thresh-high
1, //agc_inner_thresh_high_dec_steps *** adi,agc-inner-thresh-high-dec-steps
24, //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
5, //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 */
#ifdef TUMSIS_MODEM
10, //fagc_lock_level *** adi,fagc-lock-level
#endif
1, //fagc_lock_level_lmt_gain_increase_en *** adi,fagc-lock-level-lmt-gain-increase-enable
6, //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_exit1_rx_mode *** adi,fagc-gain-index-type-after-exit1-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
0, //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_exit1_cnt *** adi,fagc-energy-lost-stronger-sig-gain-lock-exit1-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
100000, //rssi_duration *** adi,rssi-duration
SPI_WRITE_TO_REGISTER, //rssi_restart_mode *** adi,rssi-restart-mode
1, //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 */
0x03, //ctrl_outs_enable_mask *** adi,ctrl-outs-enable-mask
0x12, //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
150, //lvds_bias_mV *** adi,lvds-bias-mV
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 */
29, //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)()
};

Regards,

Yasin

Parents
  • +1
    •  Analog Employees 
    on May 9, 2019 7:17 AM
    We have a custom board that has a ad9364. We have 2017_1 libraries and we are using LVDS mode. If we are using the init parameters that are located below, there is a spurious at 1720 Mhz. Do you have any idea about this issue? 

    Hey,

    We are not aware of an issue.

    Could you post more details about the spurios signal, and the signal you are transmitting, which shows this spurios signal ?

    Maybe a print of the capture showing it ?

    How often does it occur ?

    Depending on the issue, we could maybe recommend something or determine who this question should be addressed to.

    Thanks

    Alex

Reply
  • +1
    •  Analog Employees 
    on May 9, 2019 7:17 AM
    We have a custom board that has a ad9364. We have 2017_1 libraries and we are using LVDS mode. If we are using the init parameters that are located below, there is a spurious at 1720 Mhz. Do you have any idea about this issue? 

    Hey,

    We are not aware of an issue.

    Could you post more details about the spurios signal, and the signal you are transmitting, which shows this spurios signal ?

    Maybe a print of the capture showing it ?

    How often does it occur ?

    Depending on the issue, we could maybe recommend something or determine who this question should be addressed to.

    Thanks

    Alex

Children