Name: Kenwood TM-V7A
Brand: Kenwood
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TM-V7A/E

CIRCUIT

DESCRIPTION

Unlock

Circuit

The

signal

whose

phase

has

been

compared

from

the

not

transmit

and

does

not

send

the

transmission

signals

PLL

ICs

(IC6

and

IC7:

MB1511PFV-GBND)

output,

goes

the

shift

registers.

The

microprocessor

also

generates

the

through

the

waveform

circuit,

and

input

the

beep

announce

the

unlocking.

Unlocking

announced

microprocessor.

the

level

after

waveforming

low,

the

same

manner

for

reception

too.

microprocessor

judges

this

the

unlock

signal

and

does

-©

Vec(5V)

wos

cos

C422

(C421)

/-—*

(D7

icroprocessor

10716)

esl

o°8

The

figures

parentheses

(

)are

for

the

430MHz

band

Fig.5

Unlock

circuit

Signal

System

The

RAV

and

RAU

detection

signals

for

the

144MHz

For

DTSS

operation,

the

signals

are

output

from

ANO1

band.

and

the

430MHz

band

and

the

signal

from

the

microprocessor

the

monitor.

These

signals

are

audio

composite

unit

are

converted

beep

signals

the

switched

the

cross

point

switch

(1C503)and

are

input

cross

point

switch

(IC503:

JLC1555F),

the

level

adjusted

the

electronic

control

(IC504).

While

the

beep

signal

the

electronic

control

(IC504:

MB87032APFGBND),

the

output

from

the

microprocessor,

audio

signals

for

each

result

goes

into

the

cross

point

switch

(IC503)

again,

goes

band

are

muted

the

cross

point

switch

(IC503)

with

through

the

speaker

switching

circuit,

and

output

the

theserial

data

from

the

microprocessor

(IC508).

power

amp

and

headphone

jack.

The

signals

output

from

the

electronic

control

(1C504)

into

the

cross

point

switch

(IC503)

again,

through

the

@Beep

circuit

and

mute

circuit

audio

output

mute

circuit

(Q8

and

Q9),

and

are

input

the

When

key

pressed,

the

beep

output

from

P32

speaker

switching

circuit.

The

data

transmission

from

the

microprocessor

(IC508).

microprocessor

the

electronic

control

(1C504)

the

same

for

the

TM-733A/E.

RAU

(")

AQO

Cross

point

switch

Speaker

IC503

Switching

circuit

RAS

(m2)

AOI

ELE

VOL

10504

BEEP

DTMF

DATA

Microprocessor

IC508

Fig.6

Block

diagram

Other manuals for Kenwood TM-V7A

Instruction Manual100 pages

Questions and Answers:

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Kenwood TM-V7A Specifications

General Specifications

VHF frequency range	144~148MHz
UHF frequency range	438~450MHz (U.S.A/Canada)
Antenna impedance	50Ω
Usable temperature range	-20°C to +60°C (-4°F to +140°F)
Power supply	13.8V DC ±15% (11.7~15.8V)
Grounding method	Negative-ground
Frequency stability	±3ppm (-10°C to +50°C)
Dimensions (W x H x D)	140 x 54.5 x 205.5 mm

Transmitter Specifications

High power output	50W (VHF) / 35W (UHF)
Mid power output	Approx. 10W
Low power output	Approx. 5W
Spurious emissions	-60dB or less
Maximum frequency deviation	±5kHz
Audio distortion	3% or less (at 60% modulation)
Microphone impedance	600Ω

Receiver Specifications

Circuitry	Double conversion
Intermediate frequency (1st / 2nd)	38.85MHz / 450kHz and 45.05MHz / 455kHz
Sensitivity (VHF or UHF band)	0.16μV or less (12dB SINAD)
Sensitivity (Sub VHF or UHF band)	0.25μV or less
Selectivity (-6dB)	12kHz or more
Selectivity (-60dB)	28kHz or less
Squelch sensitivity	0.1μV or less
Audio output	2W or higher (8 ohms, 5% distortion)
Audio output impedance	8Ω