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Last modified by UT2UK on 2026/04/30 15:44
From version 1.1
edited by UT2UK
on 2026/04/30 13:38
Change comment: Uploaded new attachment "1777545492264-514.png", version {1}
To version 4.2
edited by UT2UK
on 2026/04/30 13:39
Change comment: There is no comment for this version

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1 +2.5.6-hilbert release notes
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1 +Main.ERMAK-TT.ERMAK-TT test firmware updates .WebHome
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1 +**Features**:
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3 +* The rear USB port can now be switched between **Host (Master)** and **Slave** modes via the menu.
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5 +[[image:1777545492264-514.png||height="450" width="800"]]
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7 +* In **USB Slave** mode, added composite USB gadget support with a virtual COM port (**CAT control**) and a virtual audio device for PC connection.
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9 +[[image:1777545521540-352.png]]
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12 +[[image:1777545531725-172.png]] [[image:1777545537835-544.png]]
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14 +* Reworked the internal DSP filters: latency reduced by **20 ms**, and the RX/TX passband lower limit was extended down to **50 Hz**.
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18 +* Improved unwanted sideband suppression to **-90 dB** across the entire audio range.
19 +* RIT/XIT are now automatically disabled in **Split** mode.
20 +* Redesigned the boot and startup splash screens.
21 +* Improved the automatic update mechanism for the kernel and other system components.
22 +* Added **Recovery Mode**: to recover a bricked device, power on the transceiver while holding the **PTT pedal**. The transceiver will boot from the recovery partition and connect to the remote server for troubleshooting.
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