Power Supply Module; Diagram Of Power Supply Module - Hytera PT580 Service Manual

(3) TVO SWITCH: This interface is used to supply power to the TX VCO.
(4) RX LO OUTPUT: This interface is used by the RX LO to output signal to the RX mixer.
(5) TX LO OUTPUT: This interface is used by the TX LO to output signal to the Cartesian IC.

1.5 Power Supply Module

3V3D
V_PA
This module is to supply appropriate voltages to the RF circuits. The 3V3D voltage is supplied by the
power management IC of the baseband section, and passes through different LDOs to supply the
3V3_RF
60R
LDO
Rx_ON
LDO
Tx_ON
LDO
SYN_ON
LDO
SYN_ON
60R
DC/DC
Figure 6 Diagram of Power Supply Module
RF LNA
3V_RX
MIXER
80mA
IF LNA
Demodulator
3V_TX
Modulator
140mA
Modulator
3V_A
PLL IC
9mA
LT5509
3V_B
Tx_ON
100uA
Rx_VCO_ON
5V_SYN
LDO
RX_VCO_ON
Tx_VCO_ON
10
Service Manual
TX_LO_Buffer
3V_TXDRV
TX_Drive
LO1_Drive
3V_RVCO
RX LO2_VCO
5V_RVCO
RX LO1 VCO
5V_TVCO
TX LO VCO