LTE and GPS external antenna nRF9160 DK

[WassimZ98]

Hello, I owe a nRF9160 DK version 0.8.2. The ERRATA 0.7 document says that for this version the GPS antenna does not work well. I need to use GPS for extracting PPS signal from COEX1 pin, in order to synchronize more devices. I read on DK User Guide that I need a Murata adaptor MXHS83QE3000 (SWF to SMA), but i can't buy it at the moment. Is there another way to connect an external GPS antenna to the nRF9160? Or do you know another way, instead of PPS, for precise time syncronization?

I also need to find a way to use an antenna attenuator for LTE in order to make some RF test measurement.

Thanks in advance.

[Simonr]

Hi

The Murata MXHS83QE3000 adapter is the only option to connect external SMA antennas as far as I know, so I strongly suggest looking into whether you'll be able to get this or not. 

Other options for as precise time synchronization are rather limited I believe, and you would have to get other external components to keep track of the time either way. An option that would be less accurate, but not include any further components, would be to create a similar application as the BLE timesync demo for the onboard nRF52840 in NCS, but you'd be on your own in the development process here, as our recommendation is to get your hands on the Murata adapter for the most precise solution.

Best regards,

Simon

[WassimZ98]

Thank you for the reply. 

About time synchronization, if I use the command AT+CCLK i get time from LTE network. Is it a very precise time ?