Kenwood TR-7850 User manual
qi ~
ACCESSORI ES
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2
FEATURES
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3
SPECI FI CATI ONS
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4
SECTI ON
1
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I NSTALLATI ON
1
. 1
I nt er connect i on
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Mobi l e
I nst al l at i on
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Fi xed
St at i on
I nst al l at i on
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Back- up
Power
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SECTI ON
2
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CONTROLS
AND
TERMI NALS
2
. 1
Fr ont
Panel
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2
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Rear
Panel
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10
SECTI ON
3
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OPERATI ON
3
. 1
Gener al s
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3
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Memor y
I nput
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3
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SCAN
( Busy
st op)
Oper at i on
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PRI ORI TY
OPER
Swi t ch
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12
3
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TX
OFFSET
and
REVERSE
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12
3
: 6
AUTO
PATCH
Oper at i on
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SQUELCH
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HI / LOW
Swi t ch
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Met er
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3
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TONE
Swi t ch
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Adj ust ment s
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SECTI ON
4
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ADDI TI ONAL
I NFORMATI ON
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SECTI ON
5
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OPTI ONAL
ACCESSORI ES
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14
SCHEMATI C
DI AGRAMS
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15
BLOCK
DI AGRAMS
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16
AFTER
UNPACKI NG
CONTENTS
I NTRODUCTI ON
You
ar e
t he
owner
of
our
l at est
pr oduct ,
t he
new
TR- 7850
t r anscei ver
.
car ef ul l y
bef or e
pl aci ng
your
t r anscei ver
i n
ser vi ce
.
The
uni t
has
been
car ef ul l y
engi neer ed
and
manuf act ur ed
t o
r i gi d
qual i t y
st andar d,
and
shoul d
gi ve
you
sat i sf act or y
and
dependabl e
oper at i on
f or
many
year s
.
ACCESSORI ES
Pl ease
r ead
t hi s
i nst r uct i on
manual
"
Shi ppi ng
cont ai ner
:
Save
t he
boxes and
packi ng
i n
t he
event
your
uni t
needs
t o
be
t r anspor t ed
f or
r emot e
oper at i on,
or
ser vi ce
.
"
The
f ol l owi ng
expl i ci t
def i ni t i ons
appl y
i n
t hi s
manual
:
Not e
:
I f
di sr egar ded,
i nconveni ence
onl y,
no
r i sk
of
equi pment
damage
or
per sonal
i nj ur y
.
Caut i on
:
Equi pment
damage
may
occur ,
but
not
per sonal
i nj ur y
.
mai nt enance,
Car ef ul l y
unpack
your
TR- 7850
and
check
t hat
i t
i s
suppl i ed
wi t h
t he
f ol l owi ng
accesor i es
:
( 1)
Dynami c
mi cr ophone
( wi t h
U/ D
swi t ch)
50051
( T90- 0313- 05)
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. 1
pi ece
( 2) Mount i ng
Br acket
Mount i ng
par t s
:
Hex
wr ench
( wo1- 0401- 04)
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1
pi ece
Nut s
( 5
mm
di amet er )
( N
14- 0510- 04)
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4
pi eces
Hex- socket
scr ew
( N09- 0008- 04)
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. 4 pi eces
Fl at
washer s
( 6
mm
di amet er )
( N
15- 1060- 46)
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4
pi eces
Spr i ng
washer
( 6
mm
di amet er )
( N1
6- 0060- 46) _
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4
pi eces
( 3)
Feet
Rubber
f oot
( smal l , r ear )
002- 0069- 05)
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2
pi eces
Rubber
f oot
( l ar ge, f r ont )
( J02- 0070- 05)
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2
pi eces
Scr ew
( N30- 3006- 46)
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. 2
pi eces
Scr ew
( N30- 3008- 46)
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. 2
pi eces
( 4)
DC
power
cor d
( wi t h
2P
pl ug
and
f use)
( E30- 1685- 05)
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1
pi ece
( 5)
Spar e
f use
( 10A)
( F05- 1031- 05)
.
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1
pi ece
( 7) Mi ni at ur e
pl ug
( f or
ext er nal
speaker )
( E12- 0001- 05)
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pi ece
( 9) War r ant y
car d
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1
copy
( 10)
I nst r uct i on
manual
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1
copy
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FEATURES
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15
MULTI FUNCTI ON
MEMORY
CHANNELS,
EASI LY
9
BUI LT- I N
AUTOPATCH
DTMF
ENCODER
SELECTABLE
WI TH
A
ROTARY
CONTROL
Keyboar d
oper at es
as
aut opat ch
encoder
M1
- M13
. .
memor i ze
f r equency
and
of f set
( ±600
kHz
r epeat er
aut opat ch
.
or si mpl ex)
M14, MO
. .
.
. .
memor i ze
t r ansmi t
and
r ecei ve
f r equenci es
i ndependent l y
f or
nonst andar d
of f set
.
MO
. .
.
......
.
. .
pr i or i t y
channel
wi t h
si mpl ex,
±600
kHz, or
nonst andar d
of f set
oper at i on
.
10
I NTERNAL
BATTERY
BACKUP
FOR
ALL
MEMORI ES
Al l
memor y
channel s
( i ncl udi ng
t r ansmi t
of f set )
ar e
r et ai ned
when
f our
AA
Ni - Cd
bat t er i es
( not
KENWOOD
suppl i ed)
ar e
i nst al l ed
i n
bat t er y
hol der
i nsi de
TR- 7850
.
Bat t er i es
ar e
aut omat i cal l y
char ged
whi l e
t r anscei ver
i s
connect ed
t o
12V
DC
sour ce
.
PRI ORI TY
ALERT
MO
memor y
i s
pr i or i t y
channel
.
EXTENDED
FREQUENCY
COVERAGE
143
. 900
^
"
148
. 995
MHz
i n
swi t chabl e
5
kHz
or
10
kHz
st eps,
al l owi ng
si mpl ex
and
r epeat er
oper at i on
on
many
MARS
f r equenci es
.
Do
not
adj ust
coi l s,
t r i mmer s,
or
pot s!
These
ar e
f act or y
adj ust ment s
.
Do
not
i nst al l
near
heat er
out l et
.
BEFORE
connect i on,
check
pol ar i t y
.
FRONT- PANEL
KEYBOARD
For
f r equency
sel ect i on,
t r ansmi t
of f set
sel ect i on,
memor y
pr ogr ammi ng,
scan
cont r ol ,
and
sel ect i on
of
aut opat ch
encoder t ones
.
AUTOSCAN
Ent i r e
band
( 5
kHz
or
10
kHz
st eps)
and
memor i es
.
Aut omat i cal l y
l ocks
on busy
channel
;
scan
r esumes
aut omat i cal l y
af t er
sever al
seconds
unl ess
CLEAR
or
mi c
PTT
but t on
i s
pr essed
t o
cancel
scan
.
SEPARATE
DI GI TAL
READOUTS
To
di spl ay
f r equency
( bot h
r ecei ve
and
t r ansmi t )
and
memor y
channel
.
SELECTABLE
POWER
OUTPUT
40
wat t s
( Hi ) / Low
Power
( 1
t o
15W)
BUI LT- I N
PI EZO- ELECTRI C
BUZZER
t o
access
. .
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III
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-
BEFORE
USE
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Thi s
uni t
i s
desi gned
f or
12V,
negat i ve
gr ound
ONLY
.
Af t er
par ki ng
i n
t he
sun,
and
i nsi de
t emper at ur e
i s
HOT,
cool
t hi s uni t
BEFORE
t r ansmi t t i ng
.
Keep
equi pment
away
f r om
heat
and
out
of
di r ect
sunl i ght
.
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.". 1
.
.. .". 1. .
..
[ Gener al ]
Semi conduct or s
.
.
...........
.
...
.
...
.
...
.
...
.
...
.
...
. .
. . . .
MPU
1
I Cs
19
Tr ansi st or s
60
FETs
9
Di odes
79
Fr equency
r ange
.
.
......
.
...
.
............
.
"...".". . ".
. .
...
144
. 000
t o
147
. 995
MHz
Fr equency
synt hesi zer
.
...
.
............
.
............
.
...
Di gi t al
cont r ol ,
phase
l ocked
VCO
Mode
.
.
...
.
...... . .....
.
. .
. .
......
. .
...........
.
............
.
...
FM
( F3)
Ant enna i mpedance
.
.......
.
...........
.
............
.
...
50
ohm
Power
r equi r ement
.
.
...
.
...
. .
. .
. .
. .
. .
. .
.
....
".
. .
"
...
.
...
13
. 8V
DC
±15%
Gr oundi ng
.. . . . .
.
...
.
...
.
...
.
....
.
. .
.
. . .
.
. . . .
.
....
.
. .
. .
. .
. .
. .
Negat i ve
Oper at i ng
t emper at ur e
.
....
.
...........
. .
...
.
. .
. .
. .
. .
. .
-
20° C
t o
+50
1
C
Cur r ent
dr ai n
...
.
. .
. .
...
.
...
.
...
.
...........
. .
...
.
. .
. .
. .
. .
. .
0
. 4A
i n
r ecei ve
mode
wi t h
no
i nput
si gnal
9A
i n HI
t r ansmi t
mode
( Appr ox
. )
Less
t han
3
mA
f or
memor y
back up
( f r om
an
ext er nal
power
suppl y
t hr ough
t he
back up
t er mi nal )
Less t han
2
mA
f or
memor y
back up
( f r om
bat t er y)
Di mensi ons
. .
.
...
.
...
.
............
.
..........
.
..........."
.
"
175
mm
( 6- 7/ 8" )
wi de
64
mm
( 1- 1/ 2" ) hi gh
220
mm
( 8- 5/ 8" )
deep
( pr oj ect i ons
excl uded)
Wei ght
.
...
. .
. . .
.
.......
.
............
.
...
.
...
.
...............
.
.
2
. 2
kg
( 4
. 84
I bs)
( appr ox
. )
[ Tr ansmi t t er
Sect i on]
RF
out put
power
( at
13
. 8V
DC,
5052 l oad)
. . .
.
.
HI
40
Wat t s
mi n
.
LOW
1
t o
15
wat t s
appr ox
.
( Accor di ng
t o
FREQ
. )
Modul at i on
. . . .
.
...........
.
...
. .
. .
.
............
.
. .
. .
. . . . . .
.
.
Var i abl e
r eact ance
di r ect
shi f t
Fr equency
t ol er ance
.......
. .
. .
.
............
.
...
.
...
.
...
.
Less t han
±20
x
10
- 6
(
-
20° C^ J
+
50° C)
Spur i ous
r adi at i on
. .
.
........
.
. .
...
......
.
...
.
.......
.
....
HI
Less t han
-
60 dB
LOW
Less t han
-
53 dB
Maxi mum
f r equency
devi at i on
( FM)
. .
.........
" "
±5
kHz
Mi cr ophone
...
.
...
.
.......
.
....
.
. .
...
. .
. .
. .
.
. . "
."
. . ". . . . . . . .
Dynami c
mi cr ophone
wi t h
PTT
swi t ch,
50052
[ Recei ver
Sect i on]
Ci r cui t r y
. . . . . . . .
.
...
.
...........
. .
. .
...
. .
".
...
.
.......
. .
" " "
.
."
Doubl e
conver si on
super het er odyne
I nt er medi at e
f r equency
. .
. .
. .
...
. .
".
...
.
.......
. .
".
. .
. .
1st
I F
10
. 695MHz
2nd
I F
455kHz
Recei ver
sensi t i vi t y
....
.
...
.
...
.
.
.
. . .
.
...........
. .
. .
. .
. .
Bet t er
t han
0
. 5uV
f or
30 dB S/ N
Bet t er
t han
0
. 2AV
f or
12dB
SI NAD
Recei ver
sel ect i vi t y
....
.
...
.
...
.
........
.
...
.
. . . .
. .
. . .
"
. .
Mor e
t han
12kHz( - 6dB)
Less t han
24
kHz
( - 60dB)
Spur i our
r esponse
..........
. .
. .
.
.....
.
. .
.
........
. .
".
. .
. .
Bet t er t han
60 dB
Squel ch
sensi t i vi t y
.
.
.......
. .
. .
...
. . .
.
...........
. .
. .
. .
. .
0
. 16, V
( t hr eshol d)
Aut o
scan st op
l evel
........
.
...
. .
. .
. .
...
.
........
.
...
.
. .
Less
t han
0
. 2' UV
( t hr eshol d)
Audi o
out put
..........
..
...........
. .
. .
. .
...
.
....
.
...
.
. . . . . .
Mor e
t han
2
. 0
wat t s
acr oss 8
ohm
l oad
( 10%
di st
. )
Not e
:
Ci r cui t
and
r at i ngs
ar e subj ect
t o
change
wi t hout
not i ce
due
t o
devel opment s
i n
t echnol ogy
.
pI M
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1- 1
I nt er connect i on
Connect
t he
ant enna
and
power
suppl y
as
shown
i n
Fi g
.
1- 1 f or
f i xed
st at i on
.
1- 2
.
MOBI LE
I nst al l at i on,
[ gener al ]
"
I nst al l at i on
l ocat i on
Usi ng
t he suppl i ed
mount i ng
br acket ,
i nst al l
t he
t r anscei ver
under
t he
dashboar d
or
on
t he
si de
of
t he
consol e
i n
your
car
.
Mount
t he
uni t
f or
saf e
oper at i on
:
easy
keyboar d
access,
and
di spl ay
vi si bi l i t y
.
Ref er
t o
Fi g
.
1- 2A
and
Fi g
.
1- 2B
.
I f
your
car
i s
equi pped
wi t h
an
el ect r oni c
f uel
i nj ect or ,
t he
t r anscei ver
shoul d
be
as
f ar
f r om
t he
cont r ol
equi pment
as
possi bl e
.
Ant enna
i nst al l at i on
Var i ous
t ypes
of
ant enna
f or
2
met er
mobi l e
oper at i on ar e
avai l abl e
.
( See
Fi g
.
1- 2C)
NOTE
:
For
gut t er - mount
i nst al l at i on,
t he
ant enna
br acket
must
be
gr ounded
t o
t he
car
body
as
shown
i n
Fi g
.
1- 2C
.
Af f i x
t he
ant enna
secur el y,
r ef er r i ng
t o t he
ant enna
i nst r uct i on
.
For
mobi l e
ant enna
i nst al l at i on,
seepage
6
.
nnect or
~ l
""T
oc
i 3
ev
l
l
u
rrr
I ~
' '
~~
f f f
ANT
t er mi nal
0
BACK
VP~
00
E
%T
.
SP
h
I
I I I I llllllllnl~l
~
~J
SP- 40
Mobi l e
st at i on
oper at i on
l
DC
power
t er mi nal
w
l
Connect
bat t er y
t o
DC
power
t er mi nal
.
For
det ai l ed
i nst r uct i on,
see
page
6
.
Red
Fuse
Bl ack
Fi g
.
1- 1
Ant enna
and
Power
Suppl y
Connect i ons
Coaxi al
cabl e
o
U
H
F
t ype
c
Fi xed
st at i on
oper at i on
"
Power
suppl y
Connect
t he
suppl i ed
power
cor d
wi t h
f use
di r ect l y
t o
t he
bat t er y
t er mi nal s
.
Connect i ng
t o t he
ci gar et t e
l i ght er
socket
can
cause
a
poor
connect i on,
and
excessi ve vol t age
dr op
.
"
I gni t i on
noi se
The
t r anscei ver
i s
desi gned
t o
suppr ess
i gni t i on
noi se
;
however ,
i f
excessi ve
noi se
i s
pr esent ,
i t
may
be
necessar y
t o
use
suppr essor
spar k pl ugs
( wi t h
r esi st or s)
.
Regul at ed
power
suppl y
( 10A
or
mor el
O+
( 3
KPS- 12
AC
120V
I M
BC- 1
( 120V
AC)
009- 0008- 05)
1- 3
.
FI XED
STATI ON
I nst al l at i on,
[ gener al ] zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
"
Power
suppl y
( Fi g
.
1- 3)
A
r egul at ed
DC
power
suppl y
( 13 . 8V
DC,
10A
or
mor e)
i s
r equi r ed
.
"
Ant enna
( Fi g
.
1- 3)
Var i ous
t ypes
of
f i xed
st at i on
ant ennas
ar e
commer ci al l y
A
.
I nst al l at i on
posi t i on
- T
Under
dr i ver ' s
seat
I
Under si de
of
dashboar d
The
t r anscei v er
shoul d
be
away
f r omyour
knees
.
C
.
Ant enna
I nst al l at i on
Gut t er - mount ed
,
whi p
ant enna
Remove
t he
pai nt
t o
i nsur e
gr oundi ng
t o
t he
car
body
.
Roof - t op
syst em
Roof - si de
syst em
Fr ont
f ender
Dr i l l
hol es
i n
t he
bot t om
of
dashboar d
.
Secur e t he
mount i ng
br acket
wi t h
scr ews
and
nut s
.
Tr unk
lid
syst em
Be
sur e
t o
use a
2m
mobi l e
ant enna
.
Fi g
.
1- 2
I nst al l at i on
f or
Mobi l e
Oper at i on
avai l abl e,
Sel ect
your
desi r ed
ant enna
accor di ng
t o
your
i n-
st al l at i on
space
and
appl i cat i on
.
Not e
t hat
t he
SWR
of
your
ant enna
shoul d
be
l ess
t han
1
. 5
.
A
hi gh
SWR
wi l l
cause
t he
TR- 7850
pr ot ect i ve
ci r cui t
t o
oper at e,
r educi ng
t he t r ansmi t
out put
power
.
I nser t
t he
t r anscei v er
i nt o
t he
mount i ng
br acket
.
D
.
Coaxi al cabl e
connect i ons
*
I nser t
t hr ough t he bonnet
.
Bat t er y
*
Connect
Di r ect l y
t o
t he
bat t er y
t er mi nal s
.
Nut
B
.
I nst al l at i on
of
mount i ng
br acket
Body
I nst al l
t he
mount i ng
br acket
.
Move
t he
l ever
down
t o
sec ur e
t he
t r anscei v er
.
TR- 7850
Adj ust t he
i nst al l at i on
angl e
and
f ul l y
t i ght en
4
bol t s
usi ng
t he
hex
wr ench
.
* Pass t hr ough
t he
door
f i t t i ng
.
The
cabl e
can be
i nser t ed
easi l y
i f
t he door cushi on
sof t
.
Not e
t hat
r ai n
wat er
may
ent er
al ong
t he
cabl e
.
Li f t
t he
t r i m
pl at e
and
i nst al l
t he
cabl e
.
Coaxi al
cabl e
To
ant enna
1- 4
.
Back- up
Power
1
.
Wi t h
power
suppl i ed
di r ect l y
f r om
t he
car
bat t er y,
t he
mi cr o
comput er
cont i nues
oper at i ng
even
when
t he
power
swi t ch
i s
OFF
.
Cur r ent
dr ai n
i s
ver y
l ow,
appr oxi mat el y
2
. 5
mA
.
2
.
I f
you
wi sh
t o r et ai n
t he
memor i es
even
when
movi ng
t he
uni t
bet ween
t he
car
and
t he
f i xed
st at i on,
ut i l i ze
a
bat t er y
back- up
syst em
.
Ot hef wi se,
al l
t he
memor i es
ar e cl ear ed
when
t he
power
cor d
i s
di sconnect ed
.
[ Bat t er y
Back- up]
( 1)
Use
f our
AA
Ni Cd
bat t er i es,
avai l abl e
Local l y
.
( 2)
Open
t he
l ower cover
of
t he
t r anscei ver
.
( 3)
I nst al l
t he
bat t er i es
i nt o
t he
bat t er y
case
l ocat ed
on
t he
l ef t
si de,
maki ng
sur e t hat
pol ar i t y
i s
cor -
r ect
.
( 4)
The
bat t er i es
ar e
char ged
r egar dl ess
of t he
power
swi t ch
posi t i on
.
Char gi ng
cur r ent
i s
about
15
mA
.
The
bat t er y
back- up
f unct i on
oper at es
onl y
when
t he
power
cor d
i s
di sconnect ed
.
3
.
Back- up
i s
avai l abl e
f or
about
3 t o 5
days
.
To
ext end
t he
back- up
per i od,
connect
t he
( opt i onal )
BC- 1
t o
t he
ext er nal
back- up
t er mi nal
.
I NOTEI
1)
Remove
t he
bat t er i es
i f
you
don' t i nt end
t o use
t hem
f or
a
l ong per i od
of
t i me
.
1
.
Power
suppl y
connect i on
Regul at ed
power
suppl y
SP- 120
KPS- 12
TR- 7850
Yagi
ant enna
( st ack ed)
Fi g
.
1- 3
I nst al l at i on
f or
Fi xed St at i on
Oper at i on
Regul at ed
DC
St andar d
vol t age
:
13
. 8V
DC
power
suppl y
2
.
Connect i on
of
Cur r ent
capaci t y
:
Mor e
t han
10A
anot her
DC
sour ce
.
NOTE
:
F____1I
-
I I
Pr ef er abl y,
vol t age
shoul d be
'
adj ust abl e
bet ween
12v
and
16V
DC
.
The
r egul at ed
suppl y shoul d
be equi pped
wi t h
a
bui l t - i n
pr ot ect i on
ci r cui t
f or
bot h
Ant enna
i nst al l at i on
over cur r ent
and
over vol t age
.
( exampl e)
CAUTI ON
:
Bat t er y
char gi ng
power
suppl i es
Tr ansc ei ver
per f or mance
cannot be used
.
depends
l ar gel y
on
t he
t ype
of
ant enna
used
For
f i x ed
st at i on
oper at i on,
t her e
ar e
gound
pl ane
ant ennas
Rl a
( omni - di r ect i onal )
and
Yagi
ant ennaeguar
ant enn
Fi g
.
1- 4
Bat t er y
Back- up
( uni - di r ect i onal )
.
The
Yagi
ant enna
i s
sui t abl e
f or
l ong
di st ance
T
oper at i on
( D^ )
or
communi cat i on
i
( 11=1
\ \ owe
r
wi t h a
speci f i c
par t y
( havi ng
exc el l ent
di r ect i vi t y
and
hi gh
gai n)
.
An
omni - di r ect i onal
ant enna
i s
gener al l y
used
f or
l ocal
I
M
M
F
-
.
- -
FA
M
. j /
91
oper at i on
.
Regul at ed
power
suppl y
TR- 7850
I t
i s
conveni ent
t o
i nst al l
bot h
Yagi
and
gr ound pl ane ant ennas
f or
sel ect abl e
use
.
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p11XaX, I nl , I l l n11111,
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, n11111, "
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.
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I N, I U111, I n11111np
1"
1111
"
p, l
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SECTI ON
2
.
CONTROLS
AND
TERMI NALS
111111
. X111
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"
1X111
. 1X111 "
1, 1111
.
. , 1111
.
. 11
1"
1X111
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1, 1, 11
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.
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1111
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1". 1, 1, 1"
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111
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111111
"111
.
2- 1
.
Fr ont
Panel
1
.
VOL/ POWER
2
.
SQUELCH
3
.
TX
Shi f t
I ndi cat or
Power
ON- OFF
swi t ch
and vol ume
cont r ol
ar e
combi ned
.
Tur ni ng
t he
cont r ol
f ul l y
count er
cl ockwi se
wi l l
t ur n
t he
power
OFF
.
Cl ockwi se
r ot at i on
wi l l
i ncr ease
t he
vol ume
.
I n
t he
power
OFF
posi t i on,
about
2
. 5mA
cur r ent
i s
dr awn
t o
back- up
t he
mi cr o- comput er
and
about
6mA
of
l eakage
cur -
r ent
f or
f i nal
modul e,
pr ovi ded
t he
power
cabl e
i s
connect ed
t o a
const ant
power
sour ce
.
To
compl et el y
di sabl e
t he
t r anscei ver ,
di sconnect
t he
power
cabl e
.
The
squel ch
cont r ol
i s
used
t o
el i mi nat e
noi se
dur i ng
no- si g-
nal
t i me
.
Nor mal l y,
t hi s
cont r ol
i s
adj ust ed
cl ockwi se
unt i l
t he noi se
di sappear s
and
t he
BUSY
i ndi cat or
goes
of f
( t hr eshol d
l evel )
.
For
scan
oper at i on,
t hi s
cont r ol
must
be
set
t o
t he
t hr eshol d
poi nt
.
+
( RED)
:
By
pr essi ng t he
O
key
on t he
keyboar d
( 11) ,
t he
i ndi cat or
wi l l l i ght ,
i ndi cat i ng
t hat
t r ansmi t
f r equency
i s
swi t ched
up
600
kHz
f r om
t he
r ecei ve
f r equency
.
4
.
Fr equency
Di spl ay
5
.
BUSY
I ndi cat or
6
.
S/ RF
Level
met er
S
( YELLOW)
:
By
pr essi ng
t he Os
key
on
t he
keyboar d
#( 11) ,
t he
i ndi cat or
wi l l
l i ght ,
i ndi cat i ng
t hat
t he
t r anscei ver
i s
oper at i ng
i n
t he
si mpl ex
mode
.
-
( RED)
:
by pr essi ng t he
O
key
on
t he
keyboar d
#( 11) ,
t he
i ndi cat or
wi l l
l i ght ,
i ndi cat i ng
t hat
t r ansmi t
f r equency
i s
swi t ched
down
600
kHz
f r om
t he
r ecei ve
f r equency
.
Thi s
LED
f r equency
di spl ay i ndi cat es
t he
oper at i ng
f r equency
i n
4
di gi t s
( MHz- kHz)
.
Exampl e
:
146
. 940
MHz
i s
i ndi cat ed
as
" 6
. 940"
.
Thi s
l amp
wi l l
l i ght
when
t he
squel ch
i s
open
i n
r ecei ve
mode
.
Thi s
LED
l evel
met er
i ndi cat es
r ecei ve
i nput
si gnal
st r engt h
( i n
S
uni t s)
or
t r ansmi t
out put
( 1317)
.
7
.
ON
AI R
I ndi cat or
A
l i ght
emi t t i ng
di ode
( L
. E
. D)
wi l l
l i ght
dur i ng t r ansmi t
mode
.
8
.
CH
I ndi cat or
Thi s
i ndi cat es
t he
channel
No
. ,
0
t hr ough
14,
i n
2
di gi t s
.
9
.
HI / LOW
Swi t ch
Thi s
swi t ch
i s
used
t o
set
t r ansmi t
out put
power
t o
ei t her
40W
( hi gh) or
l ow
power
( 1
t o
15W)
.
Power
i s
hi gh
at
t he
nor mal
out
posi t i on
( JEL) ,
and
i s
l ow
at
t he
i n
posi t i on
( _)
.
( r ef er
t o
Page
13)
10
.
MI C
Connect or
( 6- pi n)
For
connect i on
of
t he suppl i ed
mi cr ophone
.
MI C
connect or
f r om
FRONT PANEL
( l ead col or )
11
.
Keyboar d
The
keyboar d
has
t he
f ol l owi ng
f unct i ons
( Ref er
t o
" SECTI ON
3
.
OPERATI ONI
:
0
O
( Number
keys)
:
Depr ess
f our
keys
t o
set
t he
desi r ed
oper at i ng
f r equency
.
a
( +
shi f t
key)
:
The
t r ansmi t
f r equency
wi l l
be
of f set
600
kHz
up
f r om
Depr ess
t hi s
ky
and
t he
t r anscei ver
wi l l
r emai n
i n
si mpl ex
. mode
( t r ansmi t
and
r ecei ve
f r equenci es
ar e t he
Af t er
set t i ng
t he oper at i ng f r equency,
depr ess
t hi s
key
.
CM
( Si mpl ex
key)
:
O
( -
shi f t key)
:
Af t er
set t i ng
t he oper at i ng
f r equency,
depr ess
t hi s
key
.
The
t r ansmi t
f r equency
wi l l
be
of f set
600
kHz
down
f r om
t he
r ecei ve
f r equency
.
M
7-
Thi s
i s
used
t o
i nput
t he desi r ed
f r equency
( i ncl udi ng
. 0zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
"
kHz
of f set )
t o
each
channel
f or
memor y
.
Pr ess
t he
key
and
a
check- t one
wi l l
be
hear d
.
-
-
.
"-
keys
i s
cl ear ed
.
When
cl ear ed,
t he
f r equency
di spl ay
wi l l
i ndi cat e
t he
f r equency
t hat
was
di spl ayed
bef or e
-
"
mi st akenl y
ent er ed
set t i ng
t hi s
key
i s
al so
used
t o
oper at i on
.
r el ease
t he
scan
Exampl e
:
Depr ess
t he
©
,
g0
,
®
and
M
keys
.
The
f r equency
di spl ay
wi l l
i ndi cat e
" 6
. 940"
( 146 . 940
MHz)
.
The
number
keys
f unct i on
as
aut o- pat ch
keys
dur i ng t r ansmi t
mode
.
14
.
STEP
Swi t ch
15
.
REV
Swi t ch
0'
( Scan
key)
:
Thi s
i s
used
f or
scan
oper at i on
.
Pr ess t he
key
when
t he
SQUELCH
( 2)
i s
ON
.
Thi s
wi l l
st ar t
aut o- scan
or
memo-
r y- scan
dependi ng
on t he
posi t i on
of
t he
KEY/ M
.
SEL
swi t ch
and
STEP
swi t ches
.
Aut o
Pat ch
:
Dur i ng
t r ansmi ssi on,
keys
.
1
-
9, *
and
#
oper at e
DTMF
.
KeysM
M]
M
a)
wi l l
oper at e
f our t h
col umn
i n
conj unct i on
wi t h
t he
REV
swi t ch
.
12
.
KEY/ M
.
SEL
I ndi cat or
Thi s
i ndi cat es
t he
posi t i on
of
t he
KEY/ M
.
SEL
swi t ch
.
The
KEY
i ndi cat or
wi l l
l i ght
when
t he
swi t ch
i s
depr essed
( _) ,
and
t he
M
.
i ndi cat or
wi l l
l i ght
i n
t he
out
posi t i on
( ,
)
.
13
.
KEY/ M
.
SEL
Swi t ch
Thi s
swi t ch
i s
used
t o
sel ect
t he
met hod
of
set t i ng
f r equency,
ei t her
by t he
keyboar d
or
t he
memor y
.
I n
t he
( - ) , i n
posi t i on,
t he
oper at i ng
f r equen- y
i s
set
by
t he
keyboar d
;
i n
t he
nor mal
out
posi t i on
(
Z
) , t he
oper at i ng
f r equency
can
be
set
by
usi ng t he
MEMORY
channel
sel ect or
( 16)
.
Use
t hi s
swi t ch
t o
sel ect
t he
st eps
0111111I L
:
10
kHz,
.
:
5kHz)
dur i ng
f r equency
scan
or
mi cr ophone
UP/ DOWN
oper at i on
.
I n
r ecei ve,
t hi s
swi t ch
i s
used
t o
r ever se
t he
r epeat er
shi f t
( ±600
kHz)
and
ot her t r ansmi t / r ecei ve
f r equenci es
( CH
0,
14)
.
I t i s
a
moment ar y
non- l ock t ype
swi t ch
and
r et ur ns
t o
t he
nor mal
out
posi t i on
when
r el eased
.
I n
t r ansmi t ,
t hi s
swi t ch
shi f t s
DTM
F
t ones
on
col umn
3 t o
col umn
4
( ABCD)
f unct i on
.
16
.
MEMORY
Channel
Sel ect or
Thi s
swi t ch
i s
used
t o
sel ect
one
of
15
memor y
channel s
.
Of
t hese,
channel s 1- 13
st or e
f r equenci es
i ncl udi ng
±600kHz
of f set
.
The
ot her
t wo
channel s,
1
and
14
ar e
" ODD
sl i t "
channel s,
st or i ng
t r ansmi t
and
r ecei ve
f r equenci es
i ndi vi dual l y
.
Channel
" O"
i s
t he
pr i or i t y
channel
.
17
.
PRI ORI TY
ALERT
Swi t ch
Thi s
swi t ch
i s
used
t o
check
t he
pr i or i t y,
channel
" 0"
.
Depr ess
t he
swi t ch
and
t he
pr i or i t y
channel
wi l l
be
checked
at
about
a 6
second
i nt er val
r egar dl ess
of t he
KEY/ M
.
SEL
swi t ch
posi t i on
.
A
t one
sounds
when
t he
pr i or i t y
channel
i s
i n
use
.
18
.
PRI ORI TY
OPER
Swi t ch
Thi s
swi t ch
i s
used
t o
cal l - up
t he
pr i or i t y
channel
" 0"
.
By
depr essi ng
t he swi t ch,
oper at i ng
f r equency
i s
swi t ched
t o
t he
pr i or i t y
channel
.
19
.
TONE
Swi t ch
2- 2
Rear
Panel
24 15
The
t one
swi t ch
i s
f or
cont r ol
of
a
user - suppl i ed
t one
gener at or
( not
avai l abl e
f r om
TRI O- KENWOOD)
.
21
.
DC
Power
Ter mi nal
DC
power
i nput t er mi nal
.
Connect
t he
suppl i ed
power
cor d
wi t h pl ug
.
I nput
vol t age
i s
13 . 8V
DC
.
Obser ve
pl us
(
+
)
and
mi nus
(
-
)
pol ar i t y!
22
.
EXT
.
BACK- UP
23
.
EXT
.
SP
Ter mi nal
24
.
DWN
Swi t ch
25
.
UP
Swi t ch
.
20
.
ANT
Ter mi nal
26
.
PTT
Swi t ch
Ext er nal
power
back- up
t er mi nal
t o
r et ai n
t he
memor i es
.
For
i nt er nal
back- up
oper at i on,
i nst al l
f our
AA
Ni Cd
bat t er i es
i n
t he
bui l t - i n
bat t er y
case
.
Use
t hi s
t er mi nal
t o
r et ai n
t he
memor i es
f or
a
l ong
per i od
of
t i me
( mor e
t han
1
week) ,
or
wi t h
t he
power
cor d di sconnect ed
.
Ext er nal
speaker
t er mi nal
.
Connect
an
8
ohms
speaker
usi ng
t he
suppl i ed pl ug
.
Thi s
swi t ch
i s
used
t o
st ep
t he
oper at i ng
f r equency
down
dur i ng bot h
keyboar d
and
MEMORY
Channel
oper at i on
.
When
pr essi ng
t he
swi t ch,
a
t one
wi l l
sound
.
When
t he
UP
or
DWN
swi t ch
i s
hel d
on,
f r equency
shi f t s
r api dl y
.
Pr essi ng bot h
t he
UP
and
DWN
swi t ches
si mul t aneousl y
r esul t s
i n
st oppi ng
t he
f r equency
cont r ol
oper at i on
.
Thi s
swi t ch
i s
used
t o st ep
up
t he
oper at i ng
f r equency
i n
bot h
keyboar d
and
MEMORY
channel
oper at i on
.
When
pr essi ng
t he
swi t ch,
a
t one
wi l l
sound
.
Ant enna
t er mi nal
.
Connect
an ant enna
of
50
ohms
Pr ess- t o- t al k
swi t ch
used
f or
t r ansmi ssi on
.
Thi s
wi l l
al so
i mpedance
.
r el ease
scan
oper at i on
.
10
MI NI zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
"
r X
. +MNr n
.
N
"
MNnM
.
nX
.
",
XHr
. ,
XNnMNr
"
NNI nr NNnH
.
. . .
.
.
. bMI HnXI I n
,
I NI e
.
.
. . .
. r
. Nr
"
MNr n1l Nr +l l Nr
"
r Xl l nnr HwI l I l r
"
. I H
"
, X
. nNI Nn111N
"
r NXnr XHn
.
. aNHnMNr
"
r N
. nN
.
"
, N
. aNI H
"
, NI I r aX
. nNI N
"r
. I r
"
. I I r nHI I r
"
r N
.
"
r N
.
"r
. N
"
r I XN
"
NI I I r
"
r XN~
SECTI ON
3
OPERATI ON
"
r I NN
"
r NNr +XI NnNI I r
",
NI I
,"
r N
1
Hn
.
. . .
. nMl l r
"
,
NI NnX14+Npn1l Nr
. l l r
. ,
NNr
"
Ml l r
"
MNn
,
llllr
",
Nl l r
"
r XHr
"
HI I I r +1111w111Hn1111r nHl l r
"
,INIr
",
. Nnl l l l r
"
Hl l l r
"
n111nMI H
"
HI I I r n111Nn11WnNl l r
"
r
.
"
, I I I I r nNl l r
"
, XI N"
MNr
"
r 11XnMl l r
"
MNnMNr
. r NI N+I NN+NNr aNNr
"
r I NN
"
NI Nr "
3- 1
Gener al
2
.
3
.
4
.
5
.
Thi s
t r anscei ver
uses
a
PLL
synt hesi zer
cont r ol l ed
by
mi cr o- comput er
.
The
oper at i ng
f r equency
can
be
shi f t ed
i n
ei t her
5
kHz
or
10
kHz
st eps
.
The
t r anscei ver
cover s
a
wi de
f r equency
r ange
of
143
. 900
t o
147
. 995
MHz
( whi ch
i ncl udes
some
MARS
f r equenci es)
.
Oper at i ng
f r equenci es
can
be
set
by
si mpl y
pr essi ng t he
keys
on
t he
keyboar d
.
Fr equenci es
can
al so
be
st or ed
i n
t he ( 15)
memor y
channel s
.
Tr ansmi t t er pr ecaut i ons
( 1)
The
TR- 7850
ant enna
i mpedance
i s
50
ohms
.
Be
sur e
t o
connect
an
ant enna
of
50
ohms
i mpedance
.
( 2)
Check
t he
t r ansmi t
f r equency
bef or e oper at i ng
t o
i nsur e
t hat
you
do
not
i nt er f er e
wi t h
ot her
st at i ons
.
( 3)
By
pr essi ng t he
mi cr ophone
PTT
swi t ch,
t he
TR- 7850
i s
set
i n
t r ansmi t
mode
;
t he
ON
AI R
i ndi cat or
wi l l
l i ght
and
t he
met er
i ndi cat es
t r ansmi t
power
.
Hol d
t he
mi cr ophone
about
5
cm
f r om
your
mout h
and
speak
.
Mi cr o- Comput er
Reset
( At
f i r st
power - up)
I f ,
at
i ni t i al
TURN- ON,
an
er r oneous
or
i ncor r ect
r ead-
out
i s
di spl ayed, r eset
t he
MI CRO- COMPUTER
.
Thi s
i s
not
an
equi pment
mal f unct i on
.
( 1)
Di sconnect
t he
power
pl ug
f r om
t he
DC
power
t er mi nal
( 21)
and
af t er
about
f i ve
seconds
r econ-
nect
t he
power
pl ug
.
Tur n on
t he
power
swi t ch
( 1)
.
( 2)
BACK- UP
BATTERI ES
I NSTALLED
Fi r st
r emove
t he
bat t er i es,
and
r eset t he
MI CRO- COMPUTER
as
pr evi ousl y
descr i bed
.
Rei nst al l
t he
bat t er i es
.
3- 2
Memor y
I nput
The
TR- 7850
has
t wo
di f f er ent
memor i es
;
nor mal
memor y
and
spl i t
channel
memor y
( i ncl udi ng
pr i or i t y
memor y
channel )
.
1
.
Nor mal
memor y
( CH
1- 13)
Exampl e
:
To
st or e
146
. 940
MHz
( -
600
kHz
shi f t )
i n
CH
5,
( 1)
Set
t he
KEY/ M
. SEL
swi t ch
t o
t he
KEY
posi t i on
( 2)
Set t he
MEMORY
channel
sel ect or ( 16)
t o t he
CH
5
posi t i on
.
( 3)
Ent er
t he f r equency
.
a)
b)
c)
d)
Pr ess t he
Pr ess
t he
Pr ess
t he
Pr ess
t he
Oo
[ DI SPLAY]
Fr equency
bef or e
i nput
.
key
( MHz
di gi t )
.
.
. .
.
........
b
.
key
( 100
KHz
di gi t )
. .
.
....
S
. 9
key
( 10
kHz
di gi t )
.
...
.
...
.
6
. 9
Lf
key
( 1
kHz
di gi t )
. .
.
...
.
...
.
I 59
1
4
0
( Si mpl ex
oper at i on)
( 4)
I nput
t he
shi f t
mode
.
Pr ess t he
=
key
( t he
i ndi cat i on
changes
f r om
t o
"
-
,
. )
.
( 5)
St or e t he
f r equency
i n
t he
memor y
.
Pr ess
t he
0
key
.
A
t one
wi l l
sound,
i ndi cat i ng
dat a
ent r y
.
Change
t he
channel
and
i nput ot her
f r equenci es
i n
t he
same
manner
.
Not es
:
( MEMORY
i nput )
a
.
To
i nput
MHz
di gi t s,
use
t he 3
t hr ough
8
keys
.
b
.
When
t he
MHz
di gi t
i s
3,
use
onl y t he
9
key
t o
t he
i nput t he
100 kHz
di gi t
.
c
.
When
a
wr ong
f r equency
i s
i nput
i n
er r or ,
pr ess
t he
©key
t o
cl ear
t he
f r equency
.
The
f r equency
di spl ay
wi l l
i ndi cat e
t he
pr evi ous
f r equency
bef or e
t he
l ast
i nput
.
Reent er
t he
cor r ect
f r equency
by
agai n
pr essi ng t he
keys,
st ar t i ng
wi t h
t he
MHz
di gi t
.
d
.
When
t he
1
kHz
di gi t
keys
( M- ®)
ar e
pr essed,
t he
f r equency
di spl ay
i ndi cat es
U'
.
When
t he
( CM- CM)
keys
ar e pr essed, t he
di spl ay
i ndi cat es
S
e
.
Do
not pr ess
any
ot her key
unt i l
t he
cor r ect
f r e-
quency
i s
i nput
.
The
t r anscei ver
hol ds
t he
pr evi ous
f r equency
unt i l
t he
new
f r equency
i s
i nput
.
Not es
:
( GENERAL)
1
q
I f
you
wi sh
t o
change
t he
shi f t
mode
f r om
si mpl ex,
pr ess t he
shi f t
key
f or
t he desi r ed
of f set
.
2
.
For
f r equenci es
out si de t he
144
. 00
-
174
. 995
MHz
amat eur
band,
t he
t r anscei ver
oper at es
i n
si mpl ex
mode
i ndependent
of
t he ~+
or F-
- ~
keys
.
3
.
When
t he t r ansmi t
f r equency
i s
of f set
( ±600
kHz
and
i s
out si de t he
amat eur
band,
t he
t r anscei ver
wi l l
oper at e
t husl y
:
Pr ess t he
=
key
:
Shi f t
mode
i s
i ndi cat ed
.
Pr ess t he key
:
I ndi cat i on
Fr equency
i s
out - of - band
and
i s
not
st or ed
i n
memor y
.
( Tone
does
not
sound
. )
Tr ansmi t
:
Mode
changes
t o
si mpl ex, pr essi ng
t he
PTT
swi t ch
.
( Tone
sounds
at t hi s
t i me
. )
Recei ve
:
Remai ns
i n
si mpl ex
mode
at
PTT
r el ease
.
The
si mpl ex
f r equency can
now
be
memor i zed
.
2
.
Spl i t
channel
memor y
( CH
0,
14)
Exampl e
:
To
st or e
146
. 580
MHz
r ecei ve
and
147
. 660
MHz
t r ansmi t
i n
CH
14,
pr oceed
as
f ol l ows
:
1
.
Set
t he
KEY/ M
. SEL
swi t ch
( 13)
t o
t he
KEY
posi t i on
2
.
Set
t he
memor y
channel
sel ect or ( 16)
t o
CH
14
.
3
.
Ent er
t he
r ecei ve
f r equency
.
Fr equency
bef or e
i nput
a)
Pr ess t he
©
key
( MHz
di gi t )
. .
.
.......
.
5
.
b)
Pr ess t he
( ]
key
( 100
KHz
di gi t )
...
.
6
. _5
c)
Pr ess t he
©
key ( 10
kHz
di gi t )
......
.
SSH
d)
Pr ess t he
QD
key
( 1
kHz
di gi t )
........
.
5
. SH0
Not e
:
For
f r equency
i nput
pr ecaut i ons,
r ef er
t o
" Not es"
i n
t he
pr ecedi ng
sect i on
.
( 4)
St or e t he
r ecei ve
f r equency
i n
memor y
.
Pr ess
t he
( ]
key
.
A
pul sed
t one
wi l l
sound,
i ndi cat i ng
t r ansmi t
f r equency
i s
r eady
t o
be
accept ed
.
N
ot e
:
1
.
The
t one
wi l l
sound
i nt er mi t t ent l y
unt i l
t he
t r ansmi t
f r equency
i s
st or ed
i n
memor y
.
2
.
When
t he r ecei ve
f r equency
i s
st or ed,
t r ansmi t
f r equency
bef or e t he
spl i t
( CH
14)
i s
i ndi cat ed
.
( 5)
Ent er
t he
t r ansmi t
f r equency
.
a)
Pr ess
t he
O
b)
Pr ess t he
c)
Pr ess t he
d)
Pr ess t he
( 6)
St or e t he
t r ansmi t
f r equency
i n
memor y
.
Pr ess
t he
M)
key
( t one
st ops
. )
.
...
.
...
.
. .
. .
. .
6
. 5H"
The
t r anscei ver
i s
now
r eady
f or
spl i t
f r equency
oper at i on
.
Set
t he
KEY/ M
.
swi t ch
( 13)
t o
t he
M
.
posi t i on
( )
.
NOTE
:
Af t er
t he
t r ansmi t
f r equency
i s
st or ed,
t he
f r equency
di spl ay
i ndi cat es
t he r ecei ve
f r equency
pr evi soul y set by
st ep
( 3)
.
3
.
Memor y
channel
oper at i on
Wi t h
t he
KEY/ M
. SEL
swi t ch
i n
t he
M
.
posi t i on
( Z)
.
t he
t r anscei ver
oper at es
on
t he
f r equency
set
by
t he
MEMORY
channel
sel ect or
( 16)
.
4
.
Changi ng
memor y
f r equenci es
.
I f
you
wi sh
t o
change any
memor y
f r equency, st or e a
new
f r equency
i n
t hat
channel
usi ng t he
above
pr oce-
dur es
.
The
ol d
f r equency
i s
er ased
when
t he
new
f r equency
i s
st or ed
.
3- 3
SCAN
( Busy
st op)
Oper at i on
key
( MHz
di gi t )
.
...
.
. .
.
...
.
key
( 100
kHz
di gi t )
.
...
.
.
?
. I S
key
( 10 kHz
di gi t )
.......
.
i
. S5
key
( 1
kHz
di gi t )
. .
.
......
1. 6
SL
The
SCAN
oper at i on
i s
devi ded
i nt o
keyboar d
scan,
memor y
scan
and
pr i or i t y
channel
scan
.
For
SCAN
oper at i on,
t he
squel ch
cont r ol
shoul d
be
advanced
t o
t he t hr eshol d poi nt
.
See
sect i on
3
. 7,
Squel ch
.
1
2zyxwvutsrqponmlkjihgfedcbaZYXWVUTSRQPONMLKJIHGFEDCBA
"
KEYBOARD
SCAN
1
.
Set t he
KEY/ M
. SEL
swi t ch
( 13)
t o
t he
KEY
posi t i on
( _=5_) -
2
.
Depr ess
t he
ED
key
.
Scan
st ar t s
aut omat i cal l y
i n
10
kHz
or 5
kHz
st eps
dependi ng
on
t he
posi t i on
of t he
STEP
swi t ch
( 14)
.
3
.
When
a
si gnal
i s
pr esent ,
scanni ng
st ops
.
Scan
r est ar t s
aut omat i cal l y
af t er
about
5
seconds
.
4
.
To
r el ease
t he
scan,
pr ess t he
O
key
( or
t he
mi cr ophone
PTT
swi t ch
.
"
MEMORY
SCAN
1
.
Set t he
KEY/ M
.
SEL
swi t ch
( 13)
t o
t he
M
.
SEL
posi t i on
.
2
.
Depr ess
t he
sc
key
.
The
memor y
channel s
ar e
scan-
ned
.
Scan
st ops
and
r est ar t s
t he
same
as
i n
keyboar s scan
.
3- 7
SQUELCH
"
PRI ORI TY
CHANNEL
SCAN
Depr ess
t he
PRI ORI TY
ALERT
swi t ch
( 17)
.
Regar dl ess
of
t he
KEY/ M
.
SEL
swi t ch
posi t i on,
a
t one
wi l l
sound
and
t he
BUSY
i ndi cat or
( 5)
wi l l
l i ght
at
about
6
seconds
i nt er val s
i f
t he
PRI ORI TY
channel
i s
i n
use
.
Tr af f i c
on
t he
PRI ORI TY
channel
wi l l
al so
be
momment ar i l y
hear d
.
3- 4
PRI ORI TY
OPER
Swi t ch
To
cal l - up
t he
f r equency
st or ed
i n
t he
pr i or i t y
" 0"
channel
depr ess
t he
PRI ORI TY
OPER
swi t ch
( 19)
.
3- 5
TX
OFFSET
and
REVERSE
Af t er
set t i ng
channel
f r equenci es
by
t he
keyboar d,
pr ess t he
or
ED
key
.
Tr ansmi t
f r equency
wi l l
be
of f set
pl us
or mi -
nus
600
kHz
f r om
t he
r ecei ve
f r equency
and
t he
TX
shi f t
i ndi cat or
( 3)
wi l l
di spl ay
t he
of f set
.
By
pr essi ng t he
REV
swi t ch
( 15) ,
t he t r ansmi t
and
r ecei ve
f r equenci es
wi l l
be
r ever sed
.
I f ,
at
t hi s
t i me,
t he t r ansmi t
f r equency
i s
beyond
t he
amat eur
band
f r equency, a
t one
wi l l
sound
and
t he
t r anscei ver
i s
aut omat i cal l y
i n
si mpl ex
mode
.
When
t he
REV
swi t ch
i s
pr essed,
t he
f r equency
i ndi cat ed
on
t he
di spl ay
i s
al so
r ever sed,
but
t he
TX
shi f t
i ndi cat or
( 3)
wi l l
not
change
.
3- 6
AUTO
PATCH
Oper at i on
Wi t h
t he
PTT
swi t ch
depr essed,
t he
keyboses
oper at es
i n
DTMF
.
Tone
si gnal s
wi l l
be
t r ansmi t t ed
f or
aut o
pat ch
oper at i on
.
I n
t r ansmi t ,
t o
oper at e
t he
f our t h
col umn
( ABCD) , had
t he
REV
swi t ch
i n
and
key t he
t hi r d
col umn
( 3,
6,
9,
#)
.
To
el i mi nat e
r ecei ver
noi se
at
t he
no- si gnal
condi t i on,
sl owl y
adj ust t he
squel ch
cl ockwi se
unt i l
t he noi se
di sappear s
and
t he
BUSY
i ndi cat or
goes
of f
( t hr eshol d
poi nt )
.
The
squel ch
wi l l
open, t he
BUSY
i ndi cat or
wi l l
l i ght
and
t he
speaker
wi l l
oper at e
when
a
si gnal
i s
r ecei ved
.
The
squel ch
cont r ol
i s
al so
used
f or
scan
oper at i on
cont r ol
.
I f
t he
si gnal
i s
weak
or
f ades
dur i ng
mobi l e
oper at i on,
r eadj ust
t he
squel ch
f or
consi st ent r ecept i on
.
3- 8
HI / LOW
Swi t ch
For
l ocal
communi cat i on,
i t
i s
r ecommended
t hat
power
be
r educed
t o el i mi nat e
i nt er f er ence
t o
ot her
st at i ons
and
t o
mi ni mi ze
power
consumpt i on
.
By
pr essi ng t he
HI / LOW
swi t ch,
t r ansmi t
power
i s
r educed
f r om
40W
t o
about
5W
.
3- 9
Met er
The
LED
l evel
met er
f unct i ons as
an
" S"
met er
dur i ng
r ecept i on
.
One LED
ON
equal s
0
dBu,
Fi ve
LEDs
ON
equal
20 dBy ( +10,
- 2
dB)
.
Dur i ng
l ow
power
t r ansmi ssi on,
3
LED' s
wi l l
l i ght
( at
146
MHz) ,
and
5
LED' s
wi l l
l i ght
dur i ng
hi gh
power
t r ansmi ssi on
.
3- 10
TONE
Swi t ch
Thi s
swi t ch
i s
pr ovi ded
t o
cont r ol
a user suppl i ed
and
i nst al -
l ed
t one
encoder
.
TRI O- KENWOOD
does
not
manuf act ur e
or
suppl y
t hi s
i t em
.
To
i nst al l ,
r ef er
t o
Fi g
.
3- 1
.
3- 11
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Low
Power
The
TR- 7850
l ow
power
char act er i st i c
i s
shown
i n
Fi g
.
3- 2
.
Low
power
may
be
adj ust ed
by
VR4,
shown
i n
Fi g
.
3- 3
.
a
z
w
3
O
a
a
H
O
Devi at i on
On
t he
FI X
uni t
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VR3
adj ust s
mi c
devi at i on,
cl ockwi se
i ncr eases
devi at i on
.
On
t he
cont r ol
uni t
X53- 1180- 10,
VR1
adj ust s
t one
devi at i on,
cl ockwi se
r educes
t one
devi at i on
.
20
10
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6
5
4
3
2
0 . 5
TR- 7850
LOW
POWER
144
145
146
147 148 149
CARRI ER
FREQUENCY
I N
MHz
Fi g
.
3- 2
3- 12
.
Mi scel l aneous
I nf or mat i on
1
.
Fr equency
st ep- up
at
power
swi t ch
ON
or
OFF
.
"
I n
KEY
mode
oper at i on,
t he
f r equency
may
st ep
by
one
st ep,
accor di ng
t o t he
sel ect ed
channel
st ep
.
"
I n
memor y
mode
oper at i on,
t he
channel
number
may
advance
by
one
channel
.
These
ar e
nor mal ,
and
not
a
mul f unct i on
.
2
.
Power
consumt i on
at
power
swi t ch
OFF
.
The
f i nal
power
ampl i f i er
i n
t hi s
hi gh- power
t r ancei ver
i s
f ed
di r ect l y
f r om
t he
power
sour ce
wi t hout passi ng
t hr ough
t he
power
swi t ch
.
For
t hi s
r eason,
about
6
mA
of
l eakage
cur r ent
i s
consumed
by t he
f i nal
sect i on
when
t he
power
swi t ch
i s
of f
.
Backup
cur r ent
at
about
2
. 5
mA
i s
consumed
t o
r et ai n
memor i es
.
I f
backup
bat t er i es
ar e
i nst al l ed,
char ge
cur r ent at
about
15
mA
i s
al so
consumed
.
Fi g
.
3- 1
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HI I
o
r
of
~I
Z
I
f f i
5
t o
t o
A
pr oduct
of
Model
TR- 7850
Ser i al
No
.
Dat e
of
Pur chase
Deal er
TRI O- KENW000
COMMUNI CATI ONS,
I NC
.
1
1 1
1,
West
Wal nut
St r eet ,
Compt on,
Cal i f or ni a,
90220,
U S A
TRI O- KENWOOD
CORPORATI ON
17- 5,
2- chome,
Shi buya,
Shi buya- ku,
Tokyo,
150,
Japan
TRI O- KENW000
COMMUNI CATI ONS,
GmbH
D
6374
St ei nbach
TS
.
I ndust r i est r asse
8A,
West
Ger many
TRI O- KENW000( AUSTRALI A
) PTY
.
LTD
.
30
Whi t i ng
St r eet ,
Ar t ar mon,
Sydney
N
S
W
Aust r al i a
2064
©15102
PRI NTED
I N
JAPAN
B50- 3901- 00
( K)
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