AFE7422EVM: What is the proper way to configure AFE7422 to the RX Mode 1?

Hi Eugene,

We are looking into this for you. I will loop the right apps engineer in to help you on this.

Regards,

Rob

Hi Eugene,

Please use the following configuration file to program the AFE7422 in Mode 1. To load this config file you have to go to the Low Level View tab and select Open Configuration button.

2543.AFE7422_InternalCLK_Mode 1_BW_Bypass_SingBand_Fdac_9G_Fadc_3G_RX_82240_TX84111.cfg

Please use the following ini file to capture the ADC data. To use this file please close HSDC pro and copy the ini file to this location: C:\Program Files (x86)\Texas Instruments\High Speed Data Converter Pro\14J57revE Details\ADC files 

2352.AFE74xx_RX_Mode1_Test.ini

Regards,

David Chaparro 

Hi David,

Thanks for the config files. I have tested it but it doesn't help.

First of all I cannot directly use 2352.AFE74xx_RX_Mode1_Test.ini filename because of the dot after "2543" - HSDC GUI produces two config entries: 

- 2543

and

- AFE74xx_RX_Mode1_Test

and as I already have another AFE74xx_RX_Mode1_Test.ini in the folder this leads to the confusion:

So I have renamed 2352.AFE74xx_RX_Mode1_Test.ini to 2352_AFE74xx_RX_Mode1_Test.ini to get only one string in the list of the configs:

The test. 

After choosing 2352_AFE74xx_RX_Mode1_Test I'm:

- setting ADC output data rate to 2949.12M

- in AFE GUI in low level loading 2543.AFE7422_InternalCLK_Mode 1_BW_Bypass_SingBand_Fdac_9G_Fadc_3G_RX_82240_TX84111.cfg

Results:

- ALARM LED is still ON. Other LED states:

RX LED on TSW board doesn't blink and error message appears after pressing "Capture" button:

Maybe I doing some wrong action? Can you please check?

Also I have some additional questions:

1) As I can see loading the registers through the low level tab doesn't affecting to the state of the controls in the "Advanced" tab. Is this correct? If yes - how can I tune up the AFE after loading the registers from cfg file? Can I change the controls in the "Advanced" tab after loading cfg? What configuration routine should I follow in this case?

2) Actually our goal is to use the AFE+TSW as a Transceiver in Mode1 - we need to send our own test files through the DAC and receive it with ADC. Can we do this using the files you send? Which file should I use to setup the DAC to TX Mode1 together with 2352_AFE74xx_RX_Mode1_Test?

Best Regards,

Eugene Kim

Hi David,

There's a confusion with the following: i can't see the register with address 0xbc in this list:

so please confirm if the following procedure of the reading of this register is correct:

1) Click on TRAFFICCNTL and check TRAFFICCNTL_0 box, than press Apply:

2) Select TRAFFICCNTL in this listbox and enter xBC into the address box, than press "Read":

Following this procedure I've read 0x53 from this register.

After that I have opened cfg and put 0x53 to the line 546:

and loaded cfg once again.

The result is the same - ALARM LED is on, PLL LED is off. Capture doesn't work.

Can you please check what I'm doing wrong?

Regards,

Eugene

Hi David,

Yes, after removing the line 547 the capture starts working. But I have a couple of questions:

1) As I can see in this configuration all frequency shifting is disabled - is this correct? So when I put 1GHz RF signal at the ADC input I will see it on capture at 1GHz.

2) Still I cannot get anything from the DAC TX in this mode. My actions:

- set ADC RX mode using 2352_AFE74xx_RX_Mode1_Test 

- set ADC TX mode to AFE_74xx_TX_Mode1 (built in config file)

- in DAC tab set Data Rate = 1.47456G

- create a tone at center = 100MHz, press Create tone, press Send

- load 2543.AFE7422_InternalCLK_Mode 1_BW_Bypass_SingBand_Fdac_9G_Fadc_3G_RX_82240_TX84111.cfg in AFE GUI

- press Send again.

is this correct procedure? 

3) This is really not convenient to use low level files to configure the AFE/LMK. Yes, this makes the EVMs to be working with the particular settings, but this is completely disconnected from the interactive sections of the AFE GUI. So as a result we cannot evaluate the system interactively, and the GUI becomes to just a tool to load registers values from the text file to the AFE/LMK ICs. Is there any plans to make the GUI to be interactively operable for the XVR Mode1? If yes - when this can be expected?

Thanks for your help,

Eugene

Hi David,

Thanks for your reply.

I have made a little shorter test to check the TX in Mode1 after power On:

- in HSDC Pro: select built-in AFE74xx_TX_Mode1

- set Data Rate = 1.47456G SPS

- create 2 tones around 100MHz

- press Create Tones, Press Send

- in AFE GUI: load 2543.AFE7422_InternalCLK_Mode 1_BW_Bypass_SingBand_Fdac_9G_Fadc_3G_RX_82240_TX84111.cfg

- press Send again

- re-sync the DAC JESD Link by pressing noname button in AFE GUI.

So this procedure doesn't work. No signal observed at TX RF outputs and TX LED doesn't blink on TSW board.

Can you please check?

Best Regards,

Eugene Kim

David,

UPDATE:

This procedure is working for TX Mode 1:

- in HSDC Pro: select built-in AFE74xx_TX_Mode1

- set Data Rate = 1.47456G SPS

- create 2 tones around 100MHz

- press Create Tones, Press Send

- in AFE GUI: load 2543.AFE7422_InternalCLK_Mode 1_BW_Bypass_SingBand_Fdac_9G_Fadc_3G_RX_82240_TX84111.cfg

- in AFE GUI select Mode 1 from Quick Start Tab

- press Run Complete Sequence 

- press Send again

- re-sync the DAC JESD Link by pressing noname button in AFE GUI.

After that TX LED starts blinking and I see tones at DAC output.

Regards,

Eugene

Hi Eugene,

I will work on testing both of your procedures to see if there are any differences in the Tx output.

Regards,

David Chaparro

Ho David,

Do you have any updates on this case? We need to use the kits in Mode1 with frequency shift enabled. Can you provide a way how to configure it in this mode and how to interactively change the RF frequency for TX and RX paths?

Best Regards,

Eugene