Kenwood TM-D700A Service Manual

TM-D700A/E
CIRCUIT DESCRIPTION
1.Frequency configuration
The TM-D700 has an individual VCO and PLL unit for both
VHF and UHF bands. Using these separate VCO and PLL
circuit, it can receive 2 separate bands at the same time. Also,
you can perform the full-duplex operation.
The UHF VCO is used for the following functions:
(i) UHF transmission
(ii) The first local oscillator for the main band(UHF) reception.
(ii)The first local oscillator for the sub band(VHF)
reception(halved).
The VHF VCO is used for the following functions:
(i) VHF transmission
(ii) The first local oscillator for the main band(VHF) reception.
(iii) The first local oscillator for the sub band(UHF)
The PLL reference frequency is generated by a 12.8MHz
crystal oscillator connected to the VHF and UHF PLL ICs. This
reference frequency is used for both PLL circuits.
The second local oscillator for the VHF band uses the tripled
reception(doubled). 12.8MHz reference oscillator frequency. The 45.05MHz
second local oscillator for the UHF band is generated by the IF
IC crystal oscillator circuit.
ANT
MIC
H A
y— MIC AMP [5 PLL 1 VCO 1 | , UHF TX
ly
1/2 G
ltst iF
TNC AF | 45.0SMHz MAIN
B UHF RX [|
I
osc ;
—L T
c SUB
Cc
Crystal
Crystal
VHF
AX
[774
TT 12.8MHz 45.505MHz
Crystal |
12.8MHz 128MHz k D
AQKY ose PLL 2 vco 2 I VHF TX |
J
2nd IF xe
SP v7 450kHz list iF
AF | |38.85MHz MAIN
AF
AMP
T]
DET
IF2
|
t
E
VHF
RX
[774
|
es Ge L
Lt xs 38.4MHz FE susp |_|
UHF RX
A} K | 438.000~449.995MHz D| K | 144.000~147.995MHz {Gj K | 392.950~404.945MHz K | 182.850~186.85 MHz
E | 430.000~439.995MHz E | 144.000~145.995MHz E | 384.950~394.945MHz E | 182.850~184.815 MHz
M4 | 430.000~439.995MHz M4 | 144.000~145.995MHz M4 | 384.950~394.945MHz M4 | 182.850~184.815 MHz
B| K | 438.000~439.995MHz E! K | 144.000~147.995MHz H | K_ j 378.100~386.090MHz K | 199.575~205.572 5MHz
E | 430,000~439.995MHz E | 144.000~145.995MHz E_ {| 378.100~382.090MHz E | 195.575~200.512 SMHz
M4 | 430.000~439.995MHz M4 | 144.000~145.995MHz M4 | 378.100~382.090MHz M4 | 195.575~200.572 5MHz
C | K | 144.000~147.995MHz F | K | 438.000~449.995MHz || K_| 4189.050~193.045MHz K_ | 399.150~411.1450MHz
E | 144.000~145.995MHz E | 430.000~439.995MHz E | 189.050~191.045MHz E | 391.150~401.115 MHz
M4} 144.000~145.995MHz M4 | 430.000~439.995MHz M4 | 189.050~191.045MHz M4 | 391.150~401.145 MHz
Fig.1 Frequency configuration

Kenwood TM-D700A Specifications

General

Brand	Kenwood
Model	TM-D700A
Category	Transceiver
Language	English