CC1125DK: Distance test procedure

Viswanath,

From this E2E thread, RGW states the settings he used as well as the board that was used for his test.

Are you using your own custom board? Or the CC1125 development kit?

BR,

Seong

I am using the  cc1125 development kit.

Have you calculated the estimated range with the RF parameters you are using with http://www.ti.com/tool/RF-RANGE-ESTIMATOR? 

I am using the one of the tests available in main menu "PER Test" for master and slave for 915Mhz. All I could get is less than 500 meters. Can you suggest me some parameters to use to get more range. 

All i wanted is how much distance the devices can cover while they communicate. I wanted to replace the rf433 Mhz with these devices. Yes, I saw the excel sheet after you told me to. I do not know how to calculate the noise floor interference since I am new to RF. I tried all the settings in the demo kit and all I could get is less than 500 meters. Can you guide me on how to measure the background noise floor. I am a newbie here and any help would be of great use to me.

To measure the background noise: Connect one of your board and open SmartRF Studio (You want only one board in RX, no known TX sources). Open the cont RX tab and see which RSSI you get. This is your background noise.

Thank you. Do i have to program the boards through smart rf studio before taking them out in the field or i can adjust the settings directly in the demo board? Can you please suggest what values will you keep in the demo kit for "PER Test" to achieve maximum distance.

I did as you said. I opened the smart rf studio and connected the board in default mode and opened cont rx and started the test. I got around -122db

This is for a narrow RX BW. Could you repeat the test with the setting you use in the range test? Which datarte etc are you using? 

I use data rate as 1.2kbps and frequency as 915Mhz. I do not know the RX filter BW and deviation frequency so I kept that to default values and I still get the same values. 

In the demo kit on the LCD screen what I use is,

PER Test -> Expert Mode -> Manual mode -> 915Mhz -> Master -> one-way.

with data as 1.2kbps and TX Power as 14dBm.

In another demo kit, I click the same settings with slave mode. I used to walk around the master device to decide the range and it is limited to only 500 meters. 

Viswanath,

Now that you have the required parameters, using the RF Range Estimator, what is the distance calculated? Please share a screenshot. 

Thanks,

Seong

Can you suggest what Ideal parameters should I use in the demo kit. I am testing the devices in the soccer field nearby. So please give me out values from your side and I will try those values.

Your latest question is basically the same that you have asked in this thread: https://e2e.ti.com/support/wireless-connectivity/sub-1-ghz/f/156/t/860862

Have you tested using packet Rx/ Tx now?