Update iq.md

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@ -7,6 +7,8 @@ SPDX-License-Identifier: AGPL-3.0-or-later
We implement the **IQ sample capture** with interesting extensions: many **trigger conditions**; **RSSI**, RF chip **AGC** **status (lock/unlock)** and **gain**.
(By default, openwifi Rx baseband is muted during self Tx, to unmute Rx baseband and capture self Tx signal you need to run "./sdrctl dev sdr0 set reg xpu 1 1" after the test running)
## Quick start
- Power on the SDR board.
- Connect a computer to the SDR board via Ethernet cable. The computer should have static IP 192.168.10.1. Open a terminal on the computer, and then in the terminal: