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TM-V7A/E
CIRCUIT DESCRIPTION
@144MHz band PLL synthesizer section
The VCO section is in the shielding case and the PLL
comparison
with the reference frequencies
obtained by
section is on the TX-RX board.
The 12.8MHz reference
frequency dividing X2. For VHF-band reception, oscillation
oscillator (X1) is oscillated with the PLL IC (iC7). The 5kHz
is 182.85 to 184.845MHz (E), 182.85 to 186.845MHz (K, M)
and
6.25kHz
reference
frequencies
are
obtained
by
and for transmission, oscillation is 144.00 to 145.995MHz
frequency
dividing this signal.
Part of the
12.8MHz
(E), 144.00 to 147.995MHz (K, M).
For UHF-band sub-
oscillation output is also supplied to the 4830MHz PLL circuit
reception, oscillation is 195.575 to 200.5725 MHz (M, &),
through
a buffer amp.
199.575
to 205.5725MHz
(K) using
double
the VCO
5kHz,
10kHz,
15kHz,
20kHz,
12.5kHz,
25kHz,
and
oscillation frequency as the local frequency.
50kHz step PLL synthesizers are configured through phase
VGO(IC12:KCH27)
"4
144,0~ 147.995 MHz (KM)
ov
HT
nq
144.0~ 145.995 MHz ( E)
PLL(IC7)
MAIN
ATeaaIGr)
280
182.85 ~ 186.845 MHz (K,M)
aan 4738(GR){ | MB1511PFV-GBND}|—{
4619
Bape
4-845 M2 (E})
(P.Q
195.575~200.5725 MHz (M,E)
AMP
499.575~205.5725 MHz (K)
TT 12.8M
IC6 10pin
Fig.18
@430MHz band PLL synthesizer section
The VCO section is in the shielding case and the PLL
For
UHF
band
reception,
oscillation
is 384.95
to
section is on the TX-RX
board.
5kHz,
10kHz,
15kHz,
394.945MHz
(M, E), 392.95 to 404.945MHz
(K) and for
20kHz, 12.5kHz, 25kHz, and 50kHz step PLL synthesizers
transmission,
oscillation
is 430
to 439.995MHz
(M, &),
are
configured
through
phase
comparison
with
the
438.00 to 449.995MHz (K).
For VHF-band sub-reception,
reference frequencies obtained by frequency dividing the
oscillation is 378.1 to 382.09MHz (E), 378.1 to 386.09MHz
12.8MHz signal supplied from the 144MHz band PLL circuit.
(K, M) using double the VCO oscillation frequency as the
local frequency.
VCO(IC10:KCH28)
438~ 449.995 MHz (K)
cv
HT
'
r—k
430~ 439.995 MHz (ME)
,
S02 35 404.945 MHz (K)
.
I~
.
iz
PLL(IC6)
SS
384.95~394.945 MHz (M,E)
SUB
3SC47a8\GR) |1MB1511PFV-GBND|-{
4619
378.1 ~382.09 MHz (E)
(P.Q)
378.1 ~386.09 MHz ( K,M )
12.8M(1C7:MB1511PFV-GBND)
Fig.19
18
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