1-18 (No.RA033<Rev.001>)
2.6.4.5
Receiver PLL circuits
The receiver unit (XC1-066) has the PLL circuit for controlling the VCO that generates the hetero signal to the first local oscillator.
The first local circuit consists of the VCO (Q205, Q206 and Q207) the Buffer amplifier (Q201 and Q202),the RF amplifiers (Q215), the
PLL-IC (IC203), the Passive loop filters (C307, C298, R279, R277and C290) and the Band switches (Q203, Q204, Q209 ,Q210 and
Q211).
The VCO output with the frequency synchronized is input to the first Mixer as the first local oscillator Upper hetero signal approximately
-4dBm via Q401. The control voltage is input to ASIC (XC1-064 : IC200) via IC201.
Fig.15 Receiver PLL circuits
2.6.4.6
AVR circuit
The power supply voltage supplied from the DC unit (XC3-016 C/5) is distributed from the receiver unit (XC1-066) CN1 to IC1 (5V),
IC2 (5V), IC3 (5V), IC4 (5V) and IC5 (9V) via the Q2 DC switch.
The output of IC1 is supplied to the LNA, the 1st-Mixer and the 1st-LO amplifier via the Q405 DC switch.
The output of IC2 is supplied to the 1st-IF amplifier.
The output of IC3 is supplied to the RSSI amplifier and the AGC voltage amplifier and IC6 (3.3V AVR).
The output of IC6 is supplied to the 2nd-IF system.
The output of IC4 is supplied to the PLL system, the 2nd-Local amplifier and IC7 (3.3V AVR).
The output of IC7 is supplied to the PLL IC and the serial clock/data buffer amplifier.
The output of IC5 is supplied to the VCOs and IC8 (20V DC to DC boost converter).
The output of IC8 is supplied to the Assist circuit and the BPF.
Fig.16 AVR circuit
Ripple
fil.
SW
SW
VCO_A
Q213
DSC90010(S)
Q209
EM6M2
Q210
EM6M2
VCO
A
SW
PLL IC
IC203
Q805
LSCR523EBFS8
1st Local
90VCO
SW
Di OR
SW
Di OR
VCO_B
VCO_C
VCO_D
VCO
B
Q203
EM6M2
D201 DAN222WM
Q201
2SC5108F/Y/
VCO
C
Q211
EM6M2
ATT
Q204
EM6M2
Q202
2SC5108F/Y/
D202 DAN222WM
Q215
SKY72310362LF
2SC5108F/Y/
Q401 2SC5108F/Y/
Q207
MCH3914-H/8/
Q205
MCH3914-H/8/
Q206
MCH3914-H/8/
CN802
SW
AVR
IC1
5V
NJM7805FA-ZB
20V
DCDC
9V
AVR
IC8
TPS61041DRVR
IC5
NJM2386ADL3-09
50RF
200C
90VCO
5V
AVR
IC2
NJM78M05DL1AZB
50IF1
5V
AVR
50IF2
5V
AVR
50PLL
RF_B_ON
CN1
IC3
NJM78M05DL1AZB
3.3V
AVR
33IF
3.3V
AVR
33PLL
IC4
NJM78M05DL1AZB
IC6
MM1856A33N
IC7
MM1856A33N
Q1 LTC014EUBFS8
Q2 2SJ506
Summary of Contents for NXR-5700
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