Two display modes: big character mode and calendar mode.

Interface photo: from left to right: cat port (connected to cat port behind the rear of the radio station), microphone port, microphone port

Usage:
(1) only connect a cat line to the cat port behind the rear of the radio station to complete data transmission + power supply (two microphone ports are not connected). (recommended)
Set the 019 menu of radio station, baud rate, default 4800; set the 020 menu of radio station, select cat.

(2) if the cat port behind the bottom of the radio station has been connected to the external automatic day modulation equipment, the microphone port can be used to complete the transmission of data + power supply (the left network port is connected to the radio station, and the right network port is connected to the microphone) (the cat port is not connected).
Set the 019 menu of radio station, baud rate, default 4800; set the 059 menu of radio station, select cat.

In large character mode, the following information can be displayed:

Mode: FM, am, LSB, USB, CW, etc.
Receiving and sending State: R receiving state t transmitting state
Voltage: directly measure the power supply voltage of cat port, accurate to two decimal places
Frequency: e.g. 439.460.00
Receive s table: s0-s9, after exceeding S9, directly display 10, 20... Fifty
Transmitting power meter.

With calendar function
Hardware design :
Static protection of cat port protects cat port of the machine.
The data line of cat port is isolated to prevent the interference of radio station from affecting the use of expansion screen through the data line.
Imported high specification power chip to prevent the interference of the radio station from affecting the expansion screen through the power line.
The main control CPU, 32-bit Cortex-M3 core, has high performance and strong anti-interference ability.
Imported high-precision clock chip, built-in temperature compensation crystal, high precision, annual error within 20 seconds.
Industrial grade LCD12864 screen, built-in Font, stable and reliable, sufficient supply.
The USB serial port chip ch340n is stable and reliable. It is used for PC debugging, downloading and updating firmware.
Important:
1. Plugging and unplugging cat line must be carried out in the shutdown state. It is forbidden to plug and unplug cat line with power on, otherwise the cat port of radio station may be damaged.
2. Set the 019 menu of radio station, baud rate, 4800 by default; set the 020 menu of radio station, select cat.