Kt8900 Programming Cable Pinout Top: Qyt

Here is the typical logic flow for the connector found on the QYT KT-8900 accessory port:

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Connect the receive data wire from the adapter to the Ring 1 (TXD) of the 3.5mm jack. Here is the typical logic flow for the

|\ | \_______________________________ | | | | | \ | | TIP | RG1 | RG2 | SLEEVE |======[ CABLE ] | |_____|_____|_____|____________/ | / |/ Signal Mapping Table Plug Segment Radio Function USB-TTL Converter Connection Description RXD (Receive Data) TXD (Transmit Data) Receives data sent from the computer to the radio. Ring 1 (Next to Tip) TXD (Transmit Data) RXD (Receive Data) Transmits data from the radio back to the computer. Ring 2 (Center) No Connection / Boot Pin Ring 1 (Next to Tip) TXD (Transmit Data)

Strip a shielded 3-conductor or 4-conductor wire. Slide the plastic housing of the 3.5mm plug onto the cable before soldering. Solder the Connections:

Note: For DIY cables, "TX" on the radio must connect to "RX" on your USB-to-TTL adapter, and vice versa.