• State Not Answered
  • Replies 6 replies
  • Subscribers 62 subscribers
  • Views 3055 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 127359
Options
This post is older than 2 years and might not be relevant anymore
More Info: Consider searching for newer posts

PCB antenna and J1 connector

Ceow

Hi all,

I'm trying to measure the transmit power of nRF51 development kit with a spectrum analyzer and I am facing the following issue:

It is specified in the user guide of nRF51 that "When connecting the test probe, the internal switch in the SWF connector will disconnect the PCB antenna". However, in my case, I can still connect to the nRF51 with my phone, while an SWF connector is plugged in the board. I suppose that the trace antenna is still connected. My connection setup is like in this answer.

I was assuming that any SWF connector should work but is the one from Murata specified in the user guide the only one able to achieve this ? If not, do you have any more guidance ?

Thanks in advance

Parents
  • 0

    Yeah, -45dBm is pretty high. I just wanted to point out that there could be some confusion on the connector. The DK connector is the version that has the switch inside to reroute the signal. A standard SWF connector does not. MuRata sells both as do other companies. The male connector for the test port with the switch is different from the standard connector since the pin is longer to engage the switch. So, it is possible you were using a standard swf connector but since the long pin wasn't there the switch was not engaging. So, just to be clear the model number for the probe is MXHS83QE3000. And here is the digikey page: www.digikey.com/.../en

    The connector is actually a little clumsy to use standalone since they are designed to be installed in test jigs for production testing. You normally end up having to hold the thing the whole time.

Reply
  • 0

    Yeah, -45dBm is pretty high. I just wanted to point out that there could be some confusion on the connector. The DK connector is the version that has the switch inside to reroute the signal. A standard SWF connector does not. MuRata sells both as do other companies. The male connector for the test port with the switch is different from the standard connector since the pin is longer to engage the switch. So, it is possible you were using a standard swf connector but since the long pin wasn't there the switch was not engaging. So, just to be clear the model number for the probe is MXHS83QE3000. And here is the digikey page: www.digikey.com/.../en

    The connector is actually a little clumsy to use standalone since they are designed to be installed in test jigs for production testing. You normally end up having to hold the thing the whole time.

Children
No Data
Related