Yes. For alignment, you need a (CP2102 or FTDI), a dummy load , a power meter , and a frequency counter . The pinout is usually: Red (Vcc) not connected, Black (GND), White (TX to radio), Green (RX from radio).
While the user manual gives basic specs, the service manual provides tolerance levels . Example: qyt kt-7900d service manual
Step-by-step instructions for adjusting: Yes. For alignment