Tandy RadioShack PRO-94 User manual

RadioShack.
cJ
Catalog Number : 20-524
PRO·94
1000-CHANNEL HANDHELD TRUNKING SCANNER
CONTENT5
F" age
Specilicaûcns ' __, "' " , " .'. , __ ".. ," " '" " •. ,.," ' ,,'" ".• ~ __ 2
Bloe I<. Diag ra m '.__ _ ,._..................•.•••.•. , ~ _ __ 6
Al lgnménl end Adî u ~m-enl ......•_........•........ _ __ _ _....••..........................._ _,_._.....•... 7
T
mu bleshooting .......•_ _ _. 0 _ _.,•.•• •• •••.•....__ _...... 12
Vliril'19 OtlJgram •••••.•...............••_ " w...... 15
Pnnted Circuit Boards , _ ., .,', ••• , _ , _ 16
El plode cJ V iew and O ls,assemb ry tnstruetlons w ••• · •• • • •• , .. , " .," " • . • •• •••••••••••••••••_ •••• •• ' __ • • • 20
Mectlalli caJ P ar ts List __ ,,_' _ _......•.•.......... .. ..._ _ _ ,..•• ... .. ..• ......... __ 21
Ele ct ical P a" $. L1~ l . _ _ __ _ __ __ 22
Semiconductor Lead rcenbticeticn _ ,.,, , , _ 036
IClmer nal DI Rgra ms "" ",,,," ,," " ,.,, " ', ,w, "' "37
VOltag e cnert " '" ,"" ,"'", "' .'" '' ". 43
Schem atic D ia qra rn s . "" .. _ _ ""'"'''' 49

GENERAL
Band co veraçe :
SPECIFICATIONS
14 bands
F,,gqueocv,a nOQ :29 ti> 29.7 M Hz (10 meter am ateur band)
29 .1 10 50 MHz (VHF low band)
50 10 54 M Hz 16 meter amateur band)
106 te 136.lJ75 MHz ( A i r C r a ~ band)
137to 144 M Hz {Miîtary la rJ d mo oi I", )
144 10 14B kol Hl. (2 meter ama teur ba nd)
146 to 174 M Hz. (VHF high band)
:21 ES to 225 MHz t1 meteramateur)
4 06 to 4:a O ~ Hz: l F ed ~1 goy e7l ment land mobi le)
420 to 450 M
Hz (7 D- 0lTI amateur baoo)
450 t 04 70 MHz (UHF srendard band)
.lI7 Dt o512 M Hz. (UHF -r- ba. nd)
{lO G to 956 M Hz { P l,.: bl i~ serslee except cellu laf band '
1240 10 13 00 MHz (25 cm ëmate ur band)
I
•
Number of programmabla
chennels:
Exte rn al JackS :
Inle rnaJ Spe ake r:
Po wer r e.qu i re m9n h> :
Oper atinp ternperaiure:
Stara!)oB temperature:
Di men sion e(HWD);
W ll ight
Ae cesscnes:
H ete rnd ~ e system:
1000 channets (50 eH x 20 bank 5)
20 ene nn ets Ie .. eearcn sk.lpmemory
20 cnanr ets ter service scan 3 1{1p memory
ANT. ja ck :BNC lypo
Eeuphone j.ack (EXT. SP}: 3.5 mm dia.
EXT. Power
jack : :3 .4 mm dia. tcenser n e ~1iv e )
S -OO m. 0.5 W tae mm dia.)
4 AA elze r ec ha rq ea bie NI-Cd batte rv , 4 AAslze regular alkalinc banery or
9 V De proctded b ~ AC ,fId~ptl;'r trom EX T. Po w 9f jack
-3 0't: - +00 -C
15 :2 )( 66 x 41mm
25(] g(without baueryand antem a)
Flexibléamenna, Be lt clip
t . t st heterooyne
29 10 225 MHz : Upper hete rodyne ~ F 380 .6 050- 380 .7000 MHz)
..
06 te 512 MHz : UPPGr h ot 9tod)'né (IF 3a<l6125·380.7000 MHz)
606 to 1000 MHz: rover neterocyne elF 38 0 .7ClOC).380.7e7~ MHz:)
2. 2nd h 90 terMyna (aF ro.ss MH z)
All be-es: upper heterodyne
::1 . 3. rd he ter odyne ~ F 450 kHz)
All b8l 'ld ::l : L ow er het l(ffOdyrle
-2 -
•• •

,
,
,
!
Fit Ier: 38D.70 MHz:
SAW filt er
10.85 MHz : Mrnolithlc crystatfil!er
450 kl-lz: C er (:lmiç filter
MEASUREMENT CONDITIONS
"
GV oe at bertery te nn lnal
M-oIlm
+25 c! S 'c
1 kHz
NFM - J kHz d ev JAM 60% modo
100 JlV
ê-chmr esi s üve lood
5() rn W ( 0, &32 V)
Power SOOrt.:
An lenna im pe da nc e:
Test ter ce ra tur e:
Modulation freq ue- ncy:
Dvviatioll:
M9aI'I signal Jn ;KI 1jevet
Audio outp utload
St anda re re f. audio output
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Item
Un it
Nominal L1m n
So n" "' ;ly (S+N)lN. 20 dB
VHF low bam
AC .a 40 MHz
JI V0.5 2
.0
VHF high b an d
162 .400MHz "V 0.& 3.0
220 M H.z band 216
.00 5MHz
I' V0.• 3.0
UHF btll"td
<453..250 MHz
~ V
0.' 3.o
Ai rcratc band
127 .115 MHz
~ V
1.6 6.0
Pubf ic service band 857.200 MHz
~ V
0.6 • .0
1200 MHz ba nO
1299.9125 MHz
~ V
4 .0
20 .0
MQx j rmm sens~IVlty
127.175 MHz
"V
0.8 3
_0
T tt resholu SQ LJEIlch (MA N UA L ~
VH Flowband .1 40.640 MHz .V 0.3
1.3
VHF high band at 1
62.dOO MHz
~V
0.3 1 .•
mMHz bi21t"lL1
al 216.005 MHz
"v
0.0 3.0
UHF band
at 4532 50 MHz
~V
0.3 2.5
~ rcraft bar'ld
al: 127.175 MHz
"v
0 .3
3.0
Publicservice band
al B57 200 MHz
"V
0.' 3.•
1200MHzbaod
at 12 99 .9125 MHz "v 2.5 10.o
n, Ol sq" "1:h (MA Il UALl (S+N)/N
VHf la", ba nd
at 40.640MHz
cIl
25 15
VHF high ba nd
.q t162. .dQ OMHz
en
25 15
22 0 MHL tarn
31216. 00 5 M H2'
cIl
25 15
UHF band er
453 2 50 MHL
oB
25 15
A1rcraft band a: 127
.1 75 MHz dB 1& "
P lb li o; service band et 657
20 0MH, dB
25 15
1200 MHz band
at 1299.9125 MHz
dB 25 15
Hu m and nolse
V Hf lew band at 40.
B40 MHz
dB 40 30
V HF high band at 182.
<1 00 MHz dB 40
30
2 :20 MHz band
al 2 1& .005 MHl. de 39
30
U HF band
dl 4$3.250 MHz dB 39
30
Aircr <l.ft band
al 127.175 MHz dB 47 30
Pu oli c se rv lee band
at B5 7. 200 MHz
dB 39
30
1200 MHz ba nd al 1299.
91 25 MHz dB ' 5 25
Data d
evt atlon sansitivity
Contra! eh data
a1 851. 01 25 MHz kHz +0.5
~ 1. 5
voc e eh data
atSS 1.0125MH:z kHz 10.2
=1 . ö
Audio jrcoos rc ... resp onse - 6 ~ B
(at 162 ." 00 Id-Iz)Low Hz 330
2DO - 450
High Hz 1900 1
300 - JOOO
( l'I t127 .1 75 Ml-lz) L
ew
Hz 3l() 200 - 450
High H7 1900 1200- 2900
- 4 -

.- '.- -
I
Item Unit Nominal
Lim it
A ud io OU 1p UI pcw sr of Internäl spe'lker
( ai 1 62400 "'H7 )Maximum mW 350 100
10 % THD
mW 300
90
('" 127.17S M Kz )Ma.dmum mW 350 100
10 .::ó TH DmW
300
90
Oh .t ortiQn at 5Q mW o utpu t pow er iI 00 j.1 V RF in pu t)
at 162.4 00 MH z.- I.S 6
"
at 127 .17 5 MHz
al, 2
.5 1D
Ac<;~tal::J I EI radio frequency räsptace rn ont (EIA AS-2044 0)
at ' 62 .4(\(.) MHz kHz <6 H
IF reJecüo nl.3fI0.7 MHz;
al 162 .4 MHz d8
60
sa
Residuai n cee ( Vol. : ma x. SO : cl os e) 1] 11 62 .4 r.lH zmV 0.5 2
ScaOo 'Searctlra:e
Sca nC
H' sec.
50
25
Seartfl (162,4 - 153 .4 L1H.! , MANUAL mode) Stec
èse c. 100 50
eerrent drain (at 162.40 MHzl
(al luIl output)mA De
'3 0220
(3f S qu 9IC M(1 )
mAOC
70
100
BaU. L Ol 'tJr n-on voltag-e V
410 ,50 4.35
-4 .65
Auto power of vo ttaqs
I{
4 .30
4. 15-4 .45
Battory charpe cut tent mA
60
30 - 90
AIS r'l 5e ll sili vily {at 162.4 MHz, 105 D Hol !]
kHz +O .B :t2,O
EAS DATA sansluvlty {al H5 2.4 MHz) kHz
i 1. 612,(]
N ct e: No minal specs reereeent tne oesign spocs. All umts shoultl be atae 10 cppro xme te these - some Vii U
exce en end so me may drop sllg 'l ll y beto wthese specs. Um Jt specs represe nt the absolu te worst eendten jnat
s. t ;1 might 00 eens ida red acceptat ie;in no case sholJld a unit t su to meet limi tspe cs ,
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AL IGNMENT ANC ACJUSTMENT
PREPARATION FOR A UGNM ENT
To enter the followlng test tre que ncies into the channet memo ries:
Turn 0fI the Pcwer while p/ 9Ss lng -z- '9 ,.end "S CAr~ " keys. Tllan prees •...ANUAL· ~éy .
TEST EQUIPMENT REQUIRED
.. De power supply E XT . De Pow e-r JA CK : 9.0 V oe [ce nter NtlgatlVEl)
•Oscatceecpe •Frti qu eocy counter • $INAD meter
• Digilal voltmetér • SSVM • Signal generator (SG)
,
la Mé 1 T est Frt q lJ e n cy
- 7 -
•
eh aont l T
•• tF rsq uençy
Cl'lann ol
Tem Frequ en cy Chann el
Tnt Frequen cy
130.
05{lO MHz 9 .!511 ,9125 MHz 17 857 .2000 MHz
240 .1l400 MHz 10 1065000MHz 18 911,
50 00 MHz
349
.ttOO OMHz 11
118B OOOM Hz 19 954.Q125
MH z
4138.150QMHz "1
2:1 .17 5<l M Hz
20 12
1Xl .91 25 MHz
5162.4
000 M liz
13 13 5500 0 MH z
21 216.0050 MHz
6173
.2250 MHz
,.
29,0 00 0 MHz
51 29 0
000 MHz
7 406 .8750 MHz
15
54.0000 MHz 52 512 .00 00 MHz:
"453.
25D O MH z
16 aos .OOOO MHz
•

ALlGNMENT OF REFERENCE OSC
Test Equipment Required and Connections
FfEquency Counte r
GN O o-j - - - -·
oe P<1rf Qr SvOOly
LN OO C' >-I-~
D
__ __.j -J
u
'- -.J j ~ v ~r J lIQO, J 2
AlIgnmenl Procedure
Slop
1
P,....,lo
CH14
AdJuotmen1
CT '
Re'SIu tt
öoroect lhelr equency co unter 10 LN OO .(See P a g ~ 17 lor
the positiQn.) AdjustC l1 ta obtain 391.55 MH,I :r 100 Hz.
I
,
i
AJignmenl Po int LocaliDns (RF PCB)
P (JW l') r J,lçk J2
- ,-

r:- p
AliGNIolENT OF NFIol OISCRIMINATOR
T~t Equ lpmenl Requ ired and Connec:tlons
D
DîgÎl i3Il Vu ilme I er
1:1 JilQol, J2
Tc~U6
-~--- - 0
1'7 1
S.l
@-
•,
>NT
0
"v@"''''
..."
De Pcser 5u:lply I
' ~ 7'
17 1
r. 0
,
Tu F1c ....
~ I
SG
AlIgnmenl Procedur e
Sl ep
Pref; 1J1 to
Adi u&b IIEW'I1
Re&ult
e H2
1
SG : 40 84M Hz
L1 2
Co n neet th e <figitaJ volt mete r te LND6.. (Sec Paq e 17 tor
NomO(juia1ion t
be posnicn.I Ad j us t L 12 to obtai n 1.3V -cos VDe.
10D v
Al ignmcnt Po int t.eeatlens (RF PCB)
P ..Jac kJ2
OW"
~ ~ .
I
,
c:
~
ANf JA~)(
JEi DI
-9-

ALIGNMENT OF SQUELCH
Tesl EqLipment Requir&d and Connectlons
SG
"" 'NI I
e.' Jl1C ~ I
Jf,(}l
I
'----t-ë - _J
re P{lI,l, Br Jack J2
'"
AlIgnment Procedure
Digilal Vo1mê!ter
•
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Step
1
P ~é:fiet ta
eH2
SG : 40.840 r..lHz
NFM
No mo-:tulatto n
Squelch: CW
Adlustnllent
RT1
nef:uU
Set 1heSG ~vd 50 Ihat 1h9voltaqe at LN07 i, 0.00 1'0 .05
V De. (Soo
Pa g.o 17 10r jhe P03ftioo.)
Atlj LJ.61: RTl !;l lowty un r; l the sq,mlch opens.
AlIgnmcnt Poinll"""lion (RF PCB)
E XT .ENl
J ;o,:; kJI
J]}
" 1'
- 10-

ALlGNMENT OF S.AJ JI.E .
Test EquIpmenl Requlred end Con Mct ion s
SG Fr
l3 qu 9l"lC)' Countef
Set
D
lJ'lO
-
@:!;':;k
- -
Jool G"W
T0 I-'oooe rJacLJ2
9V
Alignment Procedure
S lE pPreset
10
Adlus tmClnt
ResuIl
1-l um crllhE!' Power whi!e pressing
"2" . "9 ~ and
'PAIORITY" kflY'S . l hM prass ~ MA N U Al " key.
00 : 162,4 MHz
CO l'lnect the trequencv ccenter 10 L1' 10 9. [S ee Pa ge 17 lo r
2
100. VRT4 fhe
pO !lÎtiO n .) Adjust RT4 to oblaÎfl 2 100Hz ..=. 10Hz.
No mou ut ancn
3DinoRT3
PrQr.SS ' MA NU AL" key.
Thcn ac lu st RT3to ob tam 3 575 Hz ,:,1 0 H z:
Alignment Point Locmlon (RF PCB)
PO ..wH' Js..:k JJ
ANT Jac"
J501
E XT .EA R
~KJ'
@@
lh=-
RT9A T1
- 11 -

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Reception Check
TROUBLESHOOTING
Power ON
jNO
,
II
,
,
,
Y ES
üetectve ICZD1 , 1C202
~nr.for asKlÓaled cir cuit
YES
Dé la choa I CG end : :.r
eeee cratea C irtlJ it.
- 12-

•T
Mlomprocessor Ch""k
P OW f'r ON
NO
YES
NO
YES
ü e' ecave
t'ey c cot acr.
YES
I C20 1 15 OK.
NO
Og'ediv' IC206.
YES
HoMo : While ~jo l n g rr.e ,\b OY'(: acme, tilEr rncrcc-cceeecr mi oTrt ' be k up.'
ti SO , lIrT l tM ~l awit" OFF fln a th en ON ",n::t te$ l i'1 rt 1(1 <;flQ; k.
-1::1 -
NO
Do lrx: tlv<l X201a nd'c r
il~oo:::i ll l .. dcif'l:uit of IC:lOI.

-
A ud io SeCliO<l
RF section
Y ES
YES
lJrefectlVe IC3 an(1' Of
eeeceat ec OKui l.
NO
NO
oerec ü ve C2 ;m1 IOf 1 C4 .
NO
YES
Ch eck 1h p. ~ I) b oo (:j u tl n l cireune
oi tno t!ur"il Gtlntrol-circuil,
,.
t
NO
Tabl. 2. Unit V
Y ES
RF F-eq [M il
Pin 11
Pia , ..
Pn 15 P ,n t~
~ 11 hl1a
CBfK:l iwa ras. 2J
-~ tJ Hz 0
SI
• .1
"
s.r
"
lOS ~ 1J1 '_til
.,
0, ./ -. "
4i
0 . •
1:) 7 - 17" P A-U:
""0
..,
6' "
216- 225 !.til
., :.1 ,.1 ,., es
ChecX the " u~ q l) Orl I d 'OJ i : ~
4: 6 - 5121.H1
~ ? U,
.1
5.7 •.e
ot 1he- b lll'\Cl C OI'l !ro lo fOJ .1.
S' l 6-
N
1300 tJ
a? SJ 6.7 5
.:;"
E.; e
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-1 5-
WIRING DIAGRAM
er OHH 10; 11 U: 13SNI
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RF
PRINTED CIRCUIT BOARDS
Top View
-1 6-

I
LND9
LND3
Bottom View
- 17-
EPOXY RESIN

-
LOGIC
er
lJJ
L{)
(\)
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Top View
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BottomView
- 19 -

--- --- --
EXPLODED VIEW AND DISASSEMBLYINSTRUCTIONS
Ta remove the front case and rear case,
remove tour screws ®trom the rear ot
the unit.
Ta re
mo ve the t op case, pull out the two
kn
ob s@and Ihe spanner nut from the
t
op case.Then pull oft Ih etop case.
4
ANTEN""
AT95t
7
SPEAKE R
seso
31
R FPC S
v"'-
VN'
- 20-