Hytera RD98 Series - Interface Definition

Service Manual
79
8. Interface Definition
PA-Baseband (J105)
Pin No. Name Description
1 Pf_DET Forward power detection, ADC input
2 Temp_Protect_Volt Alarm voltage for temperature protection circuit
3 APC Output power setting, DAC output
4 VSWR_Protect_Volt Alarm voltage for the VSWR protection circuit
5 Final_Bias Bias voltage of final-stage PA, DAC output
6 GND
For grounding
7 Pr_DET Reverse power detection, ADC input
8 PA_Enable PA enable, TTL level, GPIO
9
RT1
Temperature detection signal, output by the
thermistor
10
RT2
Temperature detection signal, output by the
thermistor
Table 8-1 Interface between Baseband and PA
Exciter-Baseband (J101)
Pin No. Name Description
1 MOD_L
Modulation signal of reference crystal oscillator,
AC analog signal, from DAC
2 GND
For grounding
3 TX_PLL_CLK PLL data clock
4 GND
For grounding
5 GND
For grounding
6 TX_Control_FL Fast lock control (1: On; 0: Off)
7 TX_PLL_CS PLL data enable
8 TX_VCO_Watch
TX VCO watch, voltage sent back to MCU via
ADC