1 BASIC OPERATION4 Function Reference (FUNC) Version: 1.01 USA• PC Test Mode (Refer to 24.2 PC Test Mode.)The PC Test Mode is a mode to activate by theTUNING command sent from a computer, and in thismode, you can control transmission and reception bythe computer.• PC Tuning Mode (Refer to 24.2.3 PC Tuning Mode.)This mode allows you to adjust various transmissionand reception adjustment under the PC Test Mode.• Firmware Programming Mode (Refer to 25 Program.)You can program a firmware update in this mode. Youare able to program the firmware using a specialsoftware (FPRO.EXE) and a programming speed is115200 bps, 57600 bps, or 38400 bps. The DSPsoftware is also written into a flash memory." Transition to each modeNote: The Firmware Programming setting must be enabled byFPU before entering into PC Firmware Programming Mode.(Refer to 14 Firmware Programming Mode Setting.)1.6 DisplayFollowing are display functions of the front panel:" LED• 7-segment LED: 2 digits• TX LED: red• BUSY LED: green• POWER LED: green and red• PF1 to PF6 keys LED1.6.1 7-segment LEDAlpha-numeric characters are displayed by switching Onand Off 7 bars.Figure 1-3 All 7-segment LEDs while lit and un-lit.Figure 1-4 Available charactersNote:# Although you can use “A” to “_”, you cannot use the upper “C”since it is used in the scanning display and the ProgrammingMode display.# In addition, you cannot use “K”, “M”, “V”, “W”, “X”, and “Z”.User ModePC ModePower ONCommandCommandPower ONPF1 keyPF1 keyPF1 keyPF1 keyPC Firmware Programming ModePC Programming Mode115200 bps Mode "P.G."57600 bps Mode "P.G."38400 bps Mode "P.G."PC Test ModeCommand "E"+All segments unlit All segments lit