ADRV 9002

Question

Hello, 
 I have a two-part question regarding the TES system ARGO-NAVIS version 0.28.0. 
 1) How can I enable Fast Recovery Mode? 
 2) Why do the values of hbUnderRangeLowThresh and hbUnderRangeMidThresh remain unchanged when I adjust the Peak Over/Underload Threshold. This raises concerns about he validity of these values, since in some cases even hbUnderRangeHighThresh ends being lower than the aforementioned values

RahulMushini · Accepted Answer

Hi John, 
 John12123456 said: I have already informed by the aforementioned article, although it's informative it doesn't reply to the above. It doesn't provide information regarding agcinterval and it says that the counter resets after an attack, so does that mean that if a second simultaneously attack is needed it won;t happen until a defined value of clock cycle exceeded ? 
 The main difference between normal mode and fast attack mode is that in normal mode the gain is adjusted during a certain interval i.e., your gain update period whereas in fast attack mode the gain is adjusted as soon as the counter exceeds. 
 Now assume that a peak power of incoming signal is around 5dBm and the threshold is set to 0dBm. In both the modes of AGC, the counter goes high if the signal peak power exceeds 0dBm and then a 2dB of attenuation is implemented assuming the step size is of 2dB. Here the signal's peak power is 3dBm after the attenuation. It is still above the threshold, so the counter gets reset and wait for certain number of clock cycle to flag it and then gain is adjusted. This is the working mechanism. I hope this is clear now. 
 
 John12123456 said: Furthermore, I don't have a completed answer for using matlab to run the ADRV, regarding gain table indices, hbunderrangemid/low/thresses, hboverloadpowermode. 
 We recommend the customer to first try the configuration in TES and once happy with the configuration then use other platforms such MATLAB, C or python. You can generate the MATLAB code under the sample code tab. This will generate the MATLAB code as per the configuration done by the user. Please find the relevant link related to MATLAB code 
 Produce and Edit MATLAB Sample Code 
 Some configuration that can not be done using TES, the user can change those setting using python interface, which allows the user to use TES along with Python interface for changing necessary setting which is not available in TES. In order to do so, please open the python script provided in " ADRV9001 Transceiver Evaluation Software\Examples\Python ". Than modify the main file in order to update the settings as per the users requirement. 
 Note: This feature is only available for python.

For example, in the below example I can read the register and read the external path delay using python while TES is in use. There are few examples provided such as reading the register value, calculating the path delay, inspecting the channels, configuring the channels etc. The rest of configuration which are not provided is the users job to write the code as per the requirement. 
 
 In order to know the API sequence and the details of the data structure you can use the driver debugger option as shown below

This will give the sequence of API used while programming as well as any change made by the user after programming. Again here we have 4 language that user can chose as shown below

For instance, after programming I would like to change the normal attack mode to fast attack mode, and as you know we can not do that in TES directly. So first, I will figure out which API is needed to change the attack mode. First I will opt for Python option in the driver debugger and then go the gain control tab

Then I will modify some setting in gain control tab, for instance max gain changing from 255 to 250. Then go back to the receiver tab, you will find the APIs are updated in the driver debugger. This give us a code in Python which can be used for changing the configuration using the python interface.

Then updating the code to enable the fast recovery can be done in python. As you can see from the below screen grab, I was able to change the attack mode to fast attack.

Regarding the gain table, this gain table is loaded from the path "ADRV9001 Transceiver Evaluation Software\Resources\Adi.Adrv9001.GainTables\public" during initialization. Once TES is programmed you can check if the gain table is loaded correctly by cross checking the gain table file in the path w.r.t the gain table shown under the Gain control tab.

If you are not seeing a proper gain table being loaded then the file might have been modified in the path "ADRV9001 Transceiver Evaluation Software\Resources\Adi.Adrv9001.GainTables\public". 
 
 John12123456 said: We are working on your device every day in order to make it better, so providing information directly without reference to the guide would be very helpful. 
 
 We appreciate the effort you&rsquo;re putting in to make things work! The User Guide is a valuable resource that we strongly encourage you to review before posting questions. It contains in-depth details that are often difficult to convey fully in a forum post. Many users find that reading the guide not only answers their current questions but also helps prevent future issues. If, after reviewing the guide, you still find information missing or unclear, we&rsquo;re absolutely here to help you out.

Can I know what are we trying to achieve here? Whats the end goal, so that we can provide you with proper guidance. 
 
 Regards 
 Rahul)

Deniss45 · Answer

Hi, I'm not sure you understood what I mentioned above. You can disable the HB detector inside TES in the aforementioned location. You can then produce sample code with it off/on, and you will have it off/on inside MATLAB. The MATLAB functions are extremely similar to C99, with slight variations in names. When inspecting the MATLAB code, you would have seen the Rx Gain control configuration inside "configure.m". Enabling and disabling the HB detector is done within the PeakDetector_t struct. As shown below in the C99 API descriptions you have access to: Setting the "enableHbOverload" field to true will turn on the HB detector, and setting to false will turn it off. Below is an example of the HB detector in MATLAB code disabled that was generated inside TES : 
 
 agcCfg_peak_4 = analog_devices_eval_client_adrv9001_device.Adrv9001_PeakDetector_t.Adrv9001_PeakDetector_t_2(50, 2, 4, 26, 18, 6, 3, 4, 0, false , 1, 1, 8191, 5826, 8230, 5812, 6, 3, 4, 6, 4, 4, 0, 3, 3, analog_devices_eval_client_adrv9001_device.Adrv9001_GpioPinCrumbSel_e.ADRV9001_GPIO_PIN_CRUMB_UNASSIGNED, analog_devices_eval_client_adrv9001_device.Adrv9001_GpioPinCrumbSel_e.ADRV9001_GPIO_PIN_CRUMB_UNASSIGNED); Where "false" is the setting for HB detector. Please configure your device the way you want inside TES first ; then produce MATLAB sample code using that configuration. Ensure you read the documentation before inquiring. Regards, Deniss

Deniss45 · Answer

Hi, 
 For the first question, Fast Attack and Fast Recovery Modes for the AGC can only be enabled using API calls in C99, or Python sample code. These modes are not in the TES GUI. Details on the name and usage of APIs is located in the SDK folder - file named ADRV9001_API.chm For question 2, please provide more information, where are you reading the values of hbUnderRangeLowThresh and hbUnderRangeMidThresh? These are not shown in TES, only Peak/Power Over/Underload Thresholds. If you are using APIs already, then just configure them as you need and continue using APIs. (You can use both APIs and TES at the same time, but TES will not update the values). Regards, Deniss

Deniss45 · Answer

Hi,

Those issues with the gain table should not be there, if you study the MATLAB code that it generates, it takes the gain table from the path of your TES install.
"ADRV9001 Transceiver Evaluation Software/Resources/Adi.Adrv9001.GainTables/public/RxGainTable_0.4.0.csv"

Therefore that is the gain table it uses. I am not sure what you are using to check the tables.

The answer to your second question is directly located inside the User Guide -> Receiver Gain Control. Please read through the chapter and pay close attention to Figure 164 and text under it.

Deniss45 · Answer

Hi, A stated in the User Guide, and shown between Figures 164 and 165, you can see that 165 is Fast Attack enabled and 164 is disabled - please review the differences. As stated in red and yellow, the AGC does not wait for update counter, and does attacks immediately when in Fast Attack mode. So, to say it again for you, the second and third attack is immediately after the first attack. It is very clearly explained in the User Guide. Your gain tables are not valid at all and make no sense, and I am not sure what you are doing to get these tables. If you inspect the MATLAB code, it just grabs the real gain table from where TES is installed. Something is going wrong in your MATLAB code for those values to print/exist. Standard MATLAB sample code takes the values from TES. TES is key. Please debug your code and figure out what is going wrong. Then return if you have issues with anything from our side/development. Regards, Deniss

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