Mic ETS2228 Uživatelský manuál stáhnout pdf (Strana 26)

ETS2228 Maintenance Manual

Table 10 PLL circuit

RX-QP/RX-QM/RX-IM/RX-IP refers to the output of 4 baseband signals. They are to be sent to

MSM to be processed. SBST/SBCK/SBDT are 3 control BUSES. MSM controls RFR6122 by

controlling these three signals. The TCXO signal provides clock reference signals for all internal

components. Three categories of power provide power for RFR: VREG-RFRX provides power voltage

for PM6610; VREG-TCXO provides voltage needed by the clock for RFR6122; VREG-MSMP provides

voltage for internal RFR6122 components. RF local oscillation signals are for receiving/transmission

channels to conduct down/up conversion operations. Both channels share the same RF local oscillation

signal.

Rx-LO-IN

VCO-TUNE

RX-FAQ

LO-OUT

TCXO

Counter

RFT6122

RFR6122

Digital logic

interface

Phase

checking

SBI control

（

BUFF

）

（

）

note：Red signal is the definition of RFT pins, blue signal is the definition of RFR PIN, green signal is the definition of interface.

VCO

Loop filter

LOCK

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 42 43

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Mic ETS2228 Uživatelský manuál Strana 26