NRF5191 DECT Hello DECT sample error UNSUPPORTED_CARRIER with some CARRIER

Hi, i'm using NRF5191 with DECT.

DECT modem: 1.0.2

App: hello_dect sample

In datasheet I found that NRF9151 support various band: 1,2,4,9,22

and I'm using these value for testing

But I got error UNSUPPORTED_CARRIER with value for band 4 is 525 and 540 in rx.

Error message:

00> DECT Task: CARRIER 540
00> I: nrf_modeI: RPC_DECT_PHY_RX_RES handle 0x1, result 0x6000
00> op_complete cb time 00000000217FC733 status 24576
00> m_dect_phy_rx() handle 0x1, time 0, duration 138240000

So my question is if i'm using the right value? And if not, what is the right values that I should use. Thanks.

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