YGR
AMP
IC201
BPF
BPF
BPF
BPF
BPF
BPF
BPF
HPF
BPF
LPF
BPF
BPF
D651
IF
AMP
Q611
BPF
XTAL
64.455 MHz(BW=15 kHz)
FI911
From the
2nd TX IF
circuits
To the
BPF
circuits
To the
TX AMP circuits
LPF
LPF
IF
AMP
IC601
LO
AMP
Q811
LPF
LPF
LPF
1.6-2.0 MHz
4.0-8.0 MHz
50.0-54.0 MHz
30.0-50.0 MHz
11.0-15.0 MHz
8.0-11.0 MHz
54.0-60.0 MHz
2.0-4.0 MHz
15.0-22.0 MHz
22.0-30.0 MHz
BPF UNIT
0.03-1.6 MHz
RF-A UNIT
64.485~
124.455 MHz
1st TX LO
1ST TX IF CIRCUITS
• HF BAND (RF-A UNIT)
The 1st TX IF signal from the 2nd TX IF circuits is passed
through the 1st TX IF filter (FI911) to remove unwanted
signals. The fi ltered signal is amplifi ed by the IF AMP (Q611),
and then applied to the 1st TX mixer (D651), through the LPF.
The 1st TX IF signal is mixed with the 1st TX LO signal from
the PLL UNIT, resulting in the TX signal (TX frequency itself).
3 - 6
The converted TX signal is passed through the LPF, and
amplifi ed by the AMP (IC601), and then applied to the BPF UNIT.
The TX signal from the 1st TX IF circuits is passed through an
LPF or one of BPFs, depending on the transmitting frequency,
to remove unwanted signals contained in the TX signal.
The filtered TX signal is amplified by the YGR AMP (BPF UNIT;
IC201), and then applied to the PA-A UNIT.
Q1551/Q1552
From the 2nd
TX IF circuits
VHF TX IF
UHF TX IF
LPF
LPF
LO
AMP
Q1471
BP F
BPF
FI2711
YGR
AMP
Q2801
ATT
ATT
YGR
AMP
IC2651
D2551
BPF
FI2611/FI2612
LO
AMP
Q2471
IF
AMP
Q2521
U1Lo
To TX AMPs
BPF
XTAL
71.25 MHz
FI731
IF
AMP
Q1521
BPF
XTAL
10.85 MHz
FI331
BPF
10.85 MHz
BPF
71.25 MHz
HPF
LPF
LPF
HPF
HPF
YGR
AMP
IC1651
LPF
V1Lo
BPF
BPF
LO
AM P
IC2582
BPF
LPF
HPF
RF-B UNIT
348.75~408.75MHz
125.15~
163.15 MHz
PLL
PLL
• VHF BAND (RF-B UNIT)
The 1st TX IF signal from the 2nd TX IF circuits is passed
through the tree-staged BPF (L361–L363, C362–C364) and
BPFs (L332, C333 and FI331) to remove unwanted signals,
and then and amplified by the 1st TX IF AMP (Q1521).
The amplifi ed signal is applied to the 1st TX mixer (Q1551,
Q1552). The 1st TX IF signal is mixed with the 1st TX LO
signal from the PLL UNIT, resulting in the TX signal (TX
frequency itself).
The converted TX signal is passed through the BPF (D1611,
D1612, L1611, L1612, C1612–C1615), and then applied to
the YGR AMP (IC1651). The amplifi ed TX signal is applied
to the PA-B UNIT, through the BPF (D1671, D1672, L1671,
L1672, C1672–C1675).
• UHF BAND (RF-B UNIT)
The 1st TX IF signal from the 2nd TX IF circuits is passed
through the BPFs (L761–L763, C762–C764 and FI731) to
remove unwanted signals, and then and amplifi ed by the 1st
TX IF AMP (Q2521). The amplifi ed signal is applied to the 1st
TX mixer (D2551), through the LPF (L2551, C2551–C2553).
The 1st TX IF signal is mixed with the 1st TX LO signal from
the PLL UNIT, resulting in the TX signal (TX frequency itself).
The converted TX signal is passed through the HPF (L2611,
C2612, C2615, C2616) and passed through or by-pass
the BPF (FI2611, F2612), depending on the operating
frequency, and then applied to the YGR AMP (IC2651). The
amplified TX signal is passed through or by-pass the BPF
(FI2711), depending on the operating frequency, and then
applied to another YGR AMP (Q2801).
The amplifi ed TX signal is applied to the PA-B UNIT, through
the LPF (L2831, C2831–C2833).
• 1ST TX IF CIRCUITS (HF BAND)
• 1ST TX IF CIRCUITS (VHF/UHF BAND)