Antenna efficiency in RX mode

RE: Antenna efficiency in RX mode

JONATHAN LL — Fri, 24 Sep 2021 08:11:11 GMT

Hi,

[quote user="Otti"] So there is no possibility to send on e.g. 800MHz. Can you bypass this "lock"?[/quote]

No, there is no bypass option. XRFTEST is limited to operational band frequencies. Not possible outside operational bands.

Regards,
Jonathan

RE: Antenna efficiency in RX mode

Otti — Thu, 23 Sep 2021 05:33:37 GMT

Thank you, I know all that.
For the purpose of measuring the antenna, it would be good if you could transmit on any frequency. The frequencies are currently limited to the TX range of the band. So there is no possibility to send on e.g. 800MHz. Can you bypass this "lock"?

RE: Antenna efficiency in RX mode

JONATHAN LL — Wed, 22 Sep 2021 07:54:54 GMT

Hi,

Not entirely sure I understood correctly, but here is some answers maybe.

[quote user=""] it is not possible to send a carrier[/quote]

When testing RX the receiver is being tested so the device is not transmitting.

Have you tested: AT% XRFTEST = 1,1,14,8000,0,1,4

RX test %XRFTEST
The Nordic-proprietary %XRFTEST command can be used to test the nRF91 receiver. The command enables the RF receiver and measures signal power at the SiP antenna port with a time domain power meter and returns the measurement result.v1.0.xv1.1.xv1.2.xv1.3.xpti_v1.1.x≥1
TX test %XRFTEST
The Nordic-proprietary %XRFTEST command can be used to enable the RF transmitter. The command also measures TX power with an internal measurement receiver in time domain and returns the measurement result.v1.0.xv1.1.xv1.2.xv1.3.xpti_v1.1.x≥1

Link to docs:https://infocenter.nordicsemi.com/topic/ref_at_commands/REF/at_commands/production_test/xrftest_rx.html?cp=2_1_10_1

Here are some other Devzone cases that might be relevant:
%XRFTEST LTE-M error 8 - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)
AT%XRFTEST behavior - Nordic Q&A - Nordic DevZone - Nordic DevZone (nordicsemi.com)

Regards,
Jonathan