unmodulated Tx power on DA14585 with Sky66111

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Jean
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unmodulated Tx power on DA14585 with Sky66111

Hi Sir, 

We use DA14585 with Sky66111, 

BLE Tx  can output power 10 dbm, 

and unmodulated Tx power at 0 dbm.

Does unmodulated Tx power can output by PA(near 10 dbm?)? 

If yes, how do I modify the SDK?

Tnank you, 

 

Device: 
PM_Dialog
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Hi Jean,

Hi Jean,

Yes, the PA can amplify an unmodulated signal. However, which is your scope for transmitting an unmodulated signal?  Yoy are using a software to control the SKY66111, aren’t you? Or you are running the proximity reporter from the SDK? If you have a production test software, which can control the PA, you could also use the RF Master from SmartSnippets Toolbox for generating an unmodulated TX signal.

Thanks, PM_Dialog

Jean
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Hi Sir,

Hi Sir,

I use prod_test project, and follow UM-B-089_DA14585_Range_Extender_Reference_Application_v1.0 to make PA work.

then use RFMaster to generate modulation and unmodulation TX signal, however modulation signal is near 10 dbm, unmodulation signal is about 0 dbm. 

PM_Dialog
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Hi Jean,

Hi Jean,

As it is mentioned before, the PA can an unmodulated signal, so let me check it internally why you are getting 0dbm. You are using a custom board, is that correct?

Thanks, PM_Dialog

Jean
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Hi Sir,

Hi Sir,

Sorry for that my PA is sky66407

We use reference mother and daughter board with Sky66407,

The result is the same, unmodulated tx power is around 0 dbm, modulated tx power is 10 dbm

Thank you,

The 

PM_Dialog
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Hi Jean,

Hi Jean,

Let my check it internally and I will get back to you shortly.

Thanks, PM_Dialog

PM_Dialog
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Hi Jean,

Hi Jean,

Can you please indicate if you have checked the control signals of you PA? Do the control signals look the same when transmitting a modulated and unmodulated signal? It would be very helpful to provide me a trace of that signals. I am assuming, that the software isn't controlling the external PA signals correctly, when in unmodulated mode. The modulation itself will not change the output power by 10dB.  In addition, please check the output power directly after our device in unmodulated mode, too. It should be around 0dBm.

Thanks, PM_Dialog

Jean
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Hi Sir, 

Hi Sir, 

1. Reference Board unmodulated Tx is around 0 dbm.

2. Add PA function 

 2.1 Generate modulated Tx signal, Tx pin  low -> high 

 2.2 Generate unmodulate Tx signal, Tx pin no change 

As you are assuming, the software doesn't control PA. 

I change the SDK as UM-B-089_DA14585_Range_Extender_Reference_Application_v1.0 p70

Would I modify any other to control PA when generating unmodulated Tx  signal?

Thank you. 

PM_Dialog
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Hi Jean,

Hi Jean,

The control signals should be controlled by the SKD. The UM-B-089 describes how to control the signals for the sky66111. Can you please indicate if the software still doesn’t control the PA signals? As I mentioned in my previous post, do the control signals look the same when transmitting a modulated and unmodulated signal?

Thanks, PM_Dialog