Vertex VXR-5000 User manual

vertex ®
VXR-5000
Commercial-Grade
VHF Repeater
YAESU MUSEN co., LTD.
1-20-2 Shimomaruko, Ota-Ku, Tokyo, 146, Japan
YAESU U.S.A.
17210 Edwards Rd ., Cerritos, CA 90703, U.S.A.
YAESU
INTERNATIONAL SALES, (Caribbean, Central & So. America)
7270 NW 12th St., Suite 320, Miami , FL 33126, U.S.A.
YAESU EUROPE B.V.
Snipweg 3, 11180N Schiphol, The Netherlands
YAESU UK LTD.
Unit 2, Maple Grove Business Centre,
Lawrence Rd., Hounslow, Middlesex, TW4 60R, U.K.
YAESU GERMANY GmbH
Am Kronberger Hang 2, 0-65824 Schwalbach, Germany
YAESU HK LTD.
11 th Floor Tsim Sha Tsui Centre, 66 Mody Rd .,
Tsim Sha Tsui East, Kowloon, Hong Kong

Contents
Introduction .......... . 1-1
Repeater Version Type Identification . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-2
S
'f' .
peel lcatlons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accessories & Options • . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . .
1-3
1-4
Rear Panel Controls & Connectors . . . . . . . . . . . . . . . . . . . . . . . . 1-5
CNTL-l Unit Status LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . .. 1-6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Changing Power Transformer AC Mains Wiring ..................... 1-8
Repeater Mounting & Installation . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Rack Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . • • . . .. 1-9
Wall Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1-9
VTS-100 VX-TRUNK Interconnection. . . . . . . . . . . . . . . . . . . .. 1-11
VXR-5000 Accessory Connector .........................•.••.. 1-12
VXR-5000 Line Interface Port ...•........••................•.. 1-15
Cover Removal and Unit Access
Circuit Description . . . . . . . . . . . .
EEPROM Programming Instructions. .
Alignment ............ .
Chip Component Description ..
Block Diagram & Connection Diagram
PCB Diagram & Paris List
1-16
2-1
3-1
4-1
5-1
6-1
Control (CNTL) Unit 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 7 A-I
Control (CNTL) Unit 2 . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . • . .. 7B-l
TX Unit ........................................... ~. 7C-l
RX Unit. • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7D-1
TX VCO Unit ..............................•.....•...•. 7E-l
RX VCO Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7F-l
PA Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7G-l
REG Unit ...........•.•.......•..................... 7H-1
D SUB Unit • . • . . • • • • . . . • . . . • • • . . . . . . . • . . • • . . . • • . . • • . • . 71-1
MOD JACK Unit ........................................ 7J-l
CAPA Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . .. 7K-l
Mechanical Details and Exploded View . . . . . . . . . . . . . . . . . . . . . 8-1

VXR-5000
Introduction
~
... . . '"
+j~ ~ .lO ~
1".1 , .. ~ _
LINE
•
RX ANT ~
Ace
This manual provides tedmical informa-
tion necessary for servicing
the V XR -5000 FM
Land Mobile Repeater. A
reprint of the CE -8
channel-programming software ffic.nual is
also
included for easy reference.
Servicing this
equipment requires exper-
tise
in handling surface-mount chip compo-
nents.
Attempts by non-qualified persons to
service this
equipment may result in p'2rma-
nent damage not covered by the warranty,
and may be illegal in some countries.
Two PCB
layout diagrams are provided for
each double-sided circuit board in th2 re-
peater. Each side of the board is referred to by
Instruction Manu al
the type of the majority of components in-
stalled on that side ("leaded" or /I chip-
only"). In m ost cases one side has only chip
components,
and the other has either a mix-
ture of both chip and leaded components
(trimmers, coils, electrolytic capacitors, ~ Cs,
etc.), or leaded components only.
While
we believe the teclmical information
in this manual to be correct, Yaesu Musen
assumes no liability for damage that may oc-
cur as a resultof typographical or other errors
that may be present. Your cooperation in
pointing out any inconsistencies in the tech-
nical
information would be appreciated.
1-1

VXR-5000
Repeater Version Identification
The V XR -5000 ver sion can be de termined from the identific at ion label locat ed on the r ea r
panel. From t he production code on th e identificati on label, us e th e ta ble be low to de termine
the va r ious ha r dw are, opt i ons and operational f ea tur es fo r wh ic h the r e peate~ is configured,
based on th e ex a mple at th e bo ttom of the table.
VXR-5000 Production Codes
" Frequency Range
"
,.
13 134 -147 MH z version A
14 146 -160 MHz version 8
15 156 -168
MH z version 8S-1
16 ,"
164 -175 MHz version C
40 400 -420 MHz version A
43
f..-:" 430 -450 MHz version C
45 L
iSO -470 MHz version 0
47
"';' . , :" ,
470 -490 MHz version E
49" 490 -512 MHz version F
;'1m~,.:< ' .
.,;§!/(i. .
.,
.. '· '· ·'.t~~,·\('
....
>;:~i;;. Channel Separ~tion
. , .;y> .
b ' 12.5 kHz
G 20 kHz
H i
25/30 kHz
.' ~
'PowerOulput
.;,./ NT\.·
~5
25 Watts RF Output
."
Not Used
....
..
;, .
9 This digit not used (placeholder) :.
Control Units
., . .
~
.:: '
~.'m
..
J ' Standard Type ..
iif,
" .
..Options ..
0 w
/0 Options
1 FTS-22 CTCSS Encoder/Decoder
ACfv!~ins VOltag~~ l+"i'
, 8'
, 117 VAC
2P USA Plug w/o ground
C 117 VAC
3P USA Plug w/ground
E 220 VAC
2P USA Plug w/o ground
F 220 VP.C 3P Europe Plug
G 234 VAC 3P Europe Plug
H 234 VAC
3P Australia Plug
'L' 220 VAC
3P Australia Plug
Z 12 VDC w/o
AC Power Supply
1
., , Remarks."
..•. ' 'i." .. , '
."
AI without Special Instructions
X Jwith Special Instructions
VXR5000 15 E 25 9 J 1 c
t :his is an example of a typical Production Code and its meaning.
1-2

V XR -5000
General
Freq. Range (MHz):
Max. Ch. Spread:
No. of Channels:
Ch. Separation:
Frequency Stability:
Emission Type:
Tx Activation System:
Power Requirements:
Input Power:
8perating Temp.:
Case Size:
Weight:
Trans mitt er
Specifications
vers (A) 134 -147 (B) 146 -160 (BS1) 156 -168 (~) 164 -175
2
lv1Hz (w/ 0 degradation)
1-8
12.5 kHz / 20 kHz / 25 kHz
±2ppm
F3E
carrier-operated, CTCSS tone operated, or remote control
~00/117 /220/234 V AC (50/60 Hz), 13.8 VDC
200 W AC (25 watts RF output), 30 W standby
6.0 A DC (25 watts RF output), 500 rnA standby
-30 ~ +60 C
375 x 275 x 110 mm (WHD)
12
kg
RF Power ~utput: 25 Watts, continuous-duty
Maximum Deviation: ± 2.5 kHz (12.5 kHz spacing)
± 4.0 k Hz (20 kHz spacing)
± 5.0
kHz (25 kHz spacing)
Audio Response: + 6 dB/octave (+1.0/-3.0 dB)
A udio Distortion: <S %
FM Noise Ratio: 40dB
Spurious Emissions: -80 d Bc
Receiver
Receiver Type:
Sensitivity:
1st &
2nd IF:
Adj. ~h. Selectivity:
Intermodulation:
Spurious Response:
AF Response:
Int erface
Double-conversion, Superheterodyne
0 .5 :.tV (0 dB~) for 12 dB SI NAD
21.6
MHz (1st I.F.) 455 kHz (2nd I.F. )
70 dB
70 dB
75 dB
750 Ils de-emphasis
Line Port: 600-Q 4-wire (E+M signaling)
Accessory Port: 25-pin (DB-25F type)
Specifications subject to change without notice or obligation.
I nstruction Ma nual
1 -3

VXR-5000
VXR-5000 Options & Accessories
Madel Na,
IWn ~
YH-2 Intercom Headset w /Boom Microphone D3000319
VTS-100 VX-TRUNKUnit A06150001
MR-KIT 1 19" Cabinet Rack-Mount Unit A06500001
PD-506 VHF
Cavity DuplexerUnit D3000275
VPL-1
Programming Connection Cable
CE-8 Software Programming Disk
FS-100 DC Local Controller with Line Interface Unit A07410001
1-4

VXR-5000
Rear Panel Controls & Connector s
i-
LI IE
II
@
1. TX ANT
This N-type coaxial jack provides the
transmitter output signal for connection to
the
transmitting antenna, or TX jack on the
duplexer, if used. Impedance requirement
is 50Q.
2. RX ANT
This N-type coaxial jack accepts the re-
ceiver
input signal from the receiving an-
tenna or RX jack on the duplexer, if used.
Impedance requirement is 50Q.
3. AC
This receptacle accepts the AC power cord,
which should be connected to the AC
Mains supply or wall outlet. The AC line
voltage
must match that for which the re-
peater is wired.
4. BA TT terminal posts
The terminal posts accept 12-15-V DC for
operating the repeater from a battery or
other DC source. When operating from AC
mains, a small trickle current is present at
these terminals to maintain battery charge.
A
battery rated for 12 volts, 55 Ah (mini-
mum) is recommended for short-term
emergency /backup operation .
Instruction Manual
5. LINE
This 8-pin modular jack is used for remote
control and provides TX & RX audio, TX
keying and squelch status output. Imped-
ance is 600Q.
6. ACC
This DB-25 connector provides a data in-
terface
between the microprocessor in the
VXR-5000 and peripheral devices (such as
the VTS-100
VX- TRUNK unit).
7. LED Indicators
TX -This LED glows red when transmit-
ting.
AC -This LED glows green during AC
operation.
BATT -This LED glows orange during DC
operation.
8. Programming Jack (inside cabinet)
This 8-pin
modular-type jack is located in-
side the repeater cabinet on top of the
CNTL unit. The modular plug from the
VPL-1 Cable or FRB-2 Service Kit cable is
inserted here for channel programming
using the CE-8 channel editor software,
and an IBM PC® fPC-compatible personal
computer with RS-232 serial port .
1-5

VXR-5000
CNTL-l Unit Status LEDs:
Three LED status indicators on the CNTL-I Unit provide for visual monitoring of repeater
operation
while performing servicing and alignment. The repeater cabinet cover must be
removed to view these.
1-6
LED indicators are as follows:
AC (DI002) - On for AC Mains operation, off during DC backup (battery) operation.
TX (DI008) -Indicates transmitter is keyed.
ALARM (DIOOl) -Illuminates when any of four conditions are present:
Rx PLL Unlock*
Tx PLL Unlock*
PA
Module Hi Temp (PWR Reduction)*
EEPROM Data Error
*indicates parameter can also be monitored using the CE-8 Programming Software (see the EEPROM
Programming Sofware Instructions chapter for details).

VXR-5000
Installation
Repeater operation without a duplexer re-
quires
that two antennas be inslalled, one for
receiving and one for transmitting, so that the
receiving antenna does not absorb energy
from the transmitting antenna. ~here are a
number of ways to do this, depending on the
TX/RX frequency separation, and on the lo-
cation
available for antenna mounting. If a
duplexer is used, a single antenna suffices for
both transmitting and receiving. If using a
reduced-size duplexer, a six-c avit y model
(minimum) is recommended.
Regardless of the above choice, it is of
paramount importance that the antenna(s) be
mounted as high as possible, and in the clear
as possible,
preferably within line-of-sight to
all
repeater users. ?urthermore, losses in the
feedline(s) must be minimized, so the
feedline(s) should be high quality, and as
short as possible. :aa long feedline is neces-
sary, use coaxial hard line cable to reduce
losses.
Repeater antennas should have an im ped-
ance of 50
ohms at the operating frequency.
When separate receive and transmit antennas
are used, high-Q narrow-band types may
serve to minimize interaction . H owe ve r,
when a single antenna is used with a du-
plexer, it should be a low- Q wide-band typ2.
NEVER TRANSMIT WITHOUT HAV-
ING A TRANSMIT ANTENNA CON-
NECTED TO THE REPEATER.
AC Pow er S upply Voltage Selection
Each repeater is wired for a particular AC
mains voltage between 100 and 234 VA C.
This should be indicated by a label ne ar the
AC jack
on the rear panel. If no label is pre-
sent, or if the AC voltage on the label is differ-
ent from the local AC line, check the wir in g to
the
power transformer inside the rep eater,
and change the connections (and label) if nec-
essary, as
shown on the following page .
Changing the transformer wiring also re-
quires changing the fuse in the power supply
if the voltage is changed from below 117-V
AC to
above 200 VAe, or vice-versa. Use a
Instruction Manu al
5-amp fuse for for 117 VAC or less, or a 3-amp
fuse for 200 VAC or more.
Operation
DC Power Supply Backup
For uninterrupted operation during
power failures, a 12-volt re chargeable type
battery (55-Ah or more recommended) may
be connected to the DC terminal posts on the
rear panel.
While the repeater is operating
from the AC source, a slight charging current
will maintain ba ttery charge. In the even of
AC
power outage, the automatic power con-
trol circuit will
automatically switch the re-
peater to the backup battery, and operation
will not be interrupted.
After prolonged operation from the bat-
tery, it
should be disconnected from the re-
peater and recharged separately before
re-connecting, as the trickle charge is not suf-
ficient for recharging a completely dis-
charged battery. Never reapp ly AC power to
the repeater with a dischar ge d b attery COF-
ne cted, as the DC s ta rtup currentcan damage
the repeater and
batte ry. While operating
from a battery or DC supply, the repeater
requires approximately 7 amperes at 12 volts
during transmit.
Equipment Loc ation
While the operating temperature range of
the repeater is quite broad, the best location is
still
one in which the air temperature does not
approach the extremes or change rapidly.
M
ake sure to allow for free air circulation
around the heatsink on the rear apron at all
times.
In warm climates, the repeater should
not be sealed in a small closed room.
Protect the repeater from wind and rain,
and extremes in temperature or humidity
that may shorten the useful life of the equip-
ment. Try to locate the repeater in an environ-
ment that is also comfortable for service
personnel, if possible.
1-7

VXR-5000
Changing PowerTransformer AC
Mains Wiring
Before attempting this wiring change, re-
move the AC
power cord from the rear panel
jack.
o Remove the four screws affixing the top
cover
of the repeater, and remove the
cover.
o Note the location of the AC fuse, and the
three screws affixing the clear protective
plastic sheet to the repeater (one screw
near the fuse block,
and two on the PA
Unit).
o Remove the four screws and the plastic
sheet.
o Referring to the diagrambelow, determine
the correct transformer
primary jumper
wiring for the AC Mains voltage used in
your area.
o Next, using a medium power (approx. 30-
watt) soldering iron, rewire the jumpers
according to the diagram.
o If necessary, replace the AC fuse according
to theAC Mains voltage range:
100-117-V AC: SA
200-234-VAC: 3A
o Replace the clear protective sheet and
cover, this completes the wiring change.
---- •• - • - - - - - - - - • - - - - - - - - - - - - . - -~17
.-----: :::::: •• __ ::-----:::::: 10
100
Important!
If you change the AC
voltage range,
you must
also change the rear-panel
ACjitse. Do not replace
with a slow-blow type
fuse. Also makesure the
voltage marking
on the
rear-panellabelmatches
the
new voltage setting.
234 220 200 117 110 100 V AC
1-8
AC Mains Voltage Selection
Caution!
To avoid blowing the rear-panel AC fuse,
wait at least 30 seconds after un-plugging
the repeater AC power cord before plugging
it in again. This allows the DC power supply
capacitor-bank residual voltage to bleed
down, and prevent a high start-up current
when power is reapplied.

VXH-5000
Repeater Mounting & Installation
Rack Mo unt
The optional MR-KIT 1 bracket kit is re-
quired for installation into
an EIA-s tandard
19-inch rack. When stacking multiple V XR -
5000 units
in a rack, use forced air cooling. In
addition, repeater output power should be
reduced by approximately 50% when con-
tinuous
duty operation is expected..
C To install the repeater, first remove the top
cover
and locate the three mounting holes.
o Attach the VX R-5000 to the mounti ng cra-
dle
using the three supplied screws, then
replace
the protective sh eet and top cove r.
o Next, install the cradle front panel using
three machine screws along the panel bot-
tom, and one rack mount handle (two
screws each)
on each s;d.e.
o In serti:he unit into the :. ack cabi ne t and
secure it with four screws.
Instruction M an u al
Wall Mount
The repeater can be affixed vertically to a
wall
using the three mounting holes in the
bottom panel of the repeater chassis.
o R emove the top cover of the repeater and
clear protective sheet, then locate the three
mounting holes.
o Lay the repeat er flat on a large sheet of
paper or cardboard, and trace the outline
of
the mounting holes onto the paper to
ma ke a drilling t2mplate.
-+-I t:: 25mm
+ 1 ~ 1 · ~~ ____________ = 41 =5m=m ____________ ~ ~ 1
~ , ________ = 2 80 r m m ~ ______ ~
E
~
o Dri ve three large screws (not supplied)
into the wall studs (anchor bolts can be
use d for concrete walis), leav ing approxi-
mately 1 em of
the screw exp0sed .
D After al:gning '[he repeater chassis mount-
ing holes wi th the th r ee exposed screws (or
anch
or bolts), hang the r epeat er in place,
th
en dri ve the scre ws hom2 to securely
att ach th e re peater (see belovv).
1-9

VXR-5000
Notes:
1-10

VXR-5000
VTS-I00 VX- TRUNK I Interconnection
'I'he VTS-IOO VX- TRUNK I rack-rnoll::.1.t
unit is used with the VXR-5000 as part of a
land-mobile
trunking system. The VTS-IOO
connects to the repeater using the DB -25 con-
nector (ACC
). Interconnection requires a ca-
ble
constructed according to the diagram
below.
For
VTS-IOO operation, free the CNT LUnit
card from
the chassis as described later under
Cover Removal and Unit Access, then slide
switch 82001
on CNTL Unit 2 to the HI posi-
tion, as
shown at the right.
GND
+13.8V
i~.C.
TONE IN
AUDIO IN
DISC OUT
A GND
S-OUT
COAX
SW
NSO OFF
NSO DET
PTT
BASE
GillO
DCS I;~
TONE DET
--
TONE OFF
TX
tlUDIO MUTE
SOL LO'N
REMOTE
DO
REMOTE 01
REMOTE
02
RST (+)
RST (-)
RXA
CTC
--
--
TXA
NC
<D
COM
®
NO
®
NC
@)
COl,;
®
NO
~ .
BSY
GND
®l!----l
+V
@
@
@
@
@
@
@
®
®
®
®
A CC
VXR-5000 VTS-100
~ <V
«@@@@@@@@@@@@~
~1= @@@@@@@@@@~ff
@ @
ACC Ja ck
08 -25 Pin Numbering
Instruction Manual
HI
LOW
ACC Connector DB-25 Pin-Out Data
Pin Signal Logic 1/0 Active State
1 GND Logic & PS N/A
qround
2 +13.8 V N/A N/A
3
TXAUDIO IN Analoq Tx input N/A
4 TONE
IN
Analog TX input N/A
5 AUDIO
IN
Analoq Input N/A
6 DISC
OUT Analoq Output N/A
7 AUDIO GND Analog Ground N/A
8 S-METER OUT Proportional N/A
output
9 COAXIAL Logic Output Active Low
SWITCH
10 NSQ OFF Logic Input Active Low
11
NSQ DET Loqic Output Active Low
12
PH
Logic Input Active Low
13
BASE Logic Input Active Low
14 GND Logic & PS N/A
qround
15
DCSIN
DCS/LTR < 2.5V = logic 0
Data Input >2.5V = loqic 1
16 TONE DET Loqic Output Active Low
17 TONE OFF Loqic Input Active Low
18
TX
Loqic Output Active Low
19 AUDIO MUTE Loqic Input Active Low
20
SQLLOW Logic Input Active Low
21
DATA 0 Loqic Input Active Low
22 DATA 1 Loqic Input Active Low
23 DATA 2 Logic Input Active Low
24 RST (+) Loqic Input level of 3-5 V
DC causes
25 RST (-) Logic Input CPU reset
1- 11

VXR-5000
VXR-5000 Accessory Connector
The VXR-5000 repeater is provided with a
25-pin DB-25F female connector for accesso-
ries. Use a DB-25M 25-pin male connector to
connect accessories to the repeater. The pins
on the accessory connector are listed in the
table
on the previous page and are explained
in detail as follows:
1. GND Logic and Power Supply Ground
Connection
Chassis ground for all logic levels and
power supply return. Common with pin
13. Do not connectto pin 7(A GND), which
is for
grounding ofanalog signals only.
2. +13.8 V Power Supply
This pin provides 13.8 volts, 1.0A, regu-
lated DC from the repeater power supply.
Use
an 1A fuse to prevent damage to the
repeater.
3. TX AUDIO Analog Transmitter Input
(Voice Band 300 -3000 Hz)
Approximately 0.245 Vrms audio input
on this pin will produce full system devia-
tion
at 1 kHz (i.e. with 25 kHz channel
spacing, ±5-kHz deviation).
Input imped-
ance is
600 n. This audio is injected before
transmitter pre-emphasis and limiting
stages,
so excess signal input levels are
clipped.
This pin is intended to be used as a voice-
band input to the repeater for telephone
patch audio, line control panel audio or
community repeatertone panelaudio. The
repeater
must be in BASE mode (pin 13
grounded) for signals on this pin to be fed
to the transmitter. The absolute level
on
this pin can be adjusted by VR2001 (LINE
SENSITIVITY control) and also by S2003,
whichprovides 10 dB attenuation, both on
the CNTL-2 Unit. Use shielded cable to
connecttothispin,connectingtheshield to
pin 7 (A GND).
4. TONE IN Analog Transmitter Input
(Sub-Audible Band 67-250 Hz)
Applyinga 0.1 Vrmssub-audibletone pro-
,duces 10% of full system deviation. This
input is high impedance (approx. 10 ill),
and has a flat response characteristic (re-
peater deviation is constant for a given
1-12
signal level over the frequency range of
67-250 Hz). This pin is intended to be used
for CTCSS transmission from a commu-
nity repeater tone paneL This
input is ap-
plied after limiting
and pre-emphasis, and
therefore exhibits flat direct FM input
characteristics.
Injecting too
high a voltage here causes
over-deviation of CTCSS,
degrading per-
formance. Signals
with DC content (DCS
or
LTR data) should not be connectedhere,
but to pin 15. If the repeater is fitted with
internalCTCSS, then its output will be pre-
sent
on this pin. Use shielded cable to con-
nect to this pin, connecting
the shield to
pin 7 (A GND).
5. AUDIO IN Analog Input
Set S2005 on the CNTL-2 Unit to EXT to
enable
audio input to the LINE OUT using
this pin. This allows
Rx audio to be inter-
cepted (at
the DISC OUT pin, see below),
and externally processed for special appli-
cations, such as descrambling. The normal
position of S2005 is INT,
and in this case,
AUDIO IN signals come from Rx audio.
6. DISC OUT Analog Output
(Wide-Band 0-3000 Hz)
Received signals with full system devia-
tion produce 1 Vp-p
audio at this pin. The
output is low impedance, and is extracted
before de-emphasis
and squelch circuitry.
This
pin shouldbe used as the Discrimina-
tor Audio Signal required
by most com-
munity repeater tone panels and
telephone patch units. Use shielded cable
to connect to this
pin, and connect the
shield to
pin 7 (A GND).
7. A GND Analog Ground
Connect the shields of any accessory ana-
log signal lines to this pin. Do
not connect
this
pin to pin lor pin 13, as an audio hum
loop may result.
8. S-OUT S-Meter Output
A DC voltage proportional to the strength
of the signal currently being received (Re-
ceiver Signal Strength) is
output on this
pin. This low impedance
output is gener-
ated
by the receiver IF sub-system and

DC
V
buffered by an internal op-amp. Typical
voltages are
graphed as follows:
S-Meter Output Proportional Voltage Graph
9. COAX SW Logic Output (Active Low)
This output is intended for controlling an
external coaxial switching relay. It is an
open collector output which can sink ap-
prox. 100rnA
when active. Thissignalonly
switches if the repeater has been pro-
grammed for simplex mode. If pro-
grammed for duplex, the signal remains
open (at high impedance) at all times.
10. NSQ OFF Logic Input (Active Low)
This input is internally pulled up to 5-V
DC When pulled low by an external de-
vice, receiver squelch is canceled.
If the
internal CTCSS decoder is programmed,
pin 17 (TONE OFF) should also be pulled
low
during monitoring. If therepeater is in
the REPEATER
mode, the transmitter is
not keyed when this pin is activated, but
an incoming signal on the receiverchannel
does cause the transmitter to be keyed and
the signal repeated as normal. Do not ap-
ply more than 5 V to this pin, as this can
damage the CNTL-1 Unit CPU.
11. NSQ DET Logic Output (Active Low)
This is an open-collector, active-low out-
put capable of sinking about 100 rnA. It
indicates that the receiver squelch is open.
If the squelch control is properly set, this
indicates a carrier
on the receiver channel,
and is sometimes referred to as a COR
(Carrier Operated Relay) signal. Some tele-
phone interconnect panels and commu-
nity repeater tone panels require this
signal.
Instruction Manual
VXR-5000
12. PIT Logic Input (Active Low)
This input is internally pulled up to 5-V
DC When pulled low by an external de-
vice,
it keys the repeater transmitter, pro-
vided that the BASE signal is present on
pin 13 (indicating the repeater is in the
base
mode of operation). The pin has no
effect if the BASE signal on pin 13 is not
present (Le. the REPEATER mode is se-
lected). Avoid voltage
in excess of 5 Von
this pin, or internal damage to the CPU on
the repeater CNTL-1 unit may result.
13. BASE Logic Input (Active Low)
This input is internally pulled up to 5-V
DC In simplex mode, this pin is not nor-
mally used.
However, after programming
via CE-8 Software and pulled low by an
external device, BASE or REPEATER
modes of operation can be selected. In
BASE mode, the receiver and transmitter
operateindependently: receiver signals
do
not key the transmitter. In the alternate
(REPEATER)
mode, a proper signal on the
receive channel causes
the transmitter to
be keyed and modulated by receiver
audio. Avoid voltage in excess of 5 V on
this pin or internal damage to the CPU on
the repeater CNTL-1 unit may result.
14. GND
This is the chassis ground for all logic lev-
els
and power supply return, and is also
common with pin 1. Do not connectto pin
7 (A GND), which should only be used for
grounding of analog signals.
15. DCS IN Digital Input for Des / LTR data
This pin accepts sub-audible tones in the
range of 6 - 136
Hz for modulation of the
transmitter
with DCS orLTR data. Internal
buffering allows the
data to be DC refer-
enced from
5-9 VDC Signals below 2.5 V
are transmitted as Logic "0" while levels
above
2.5 V are Logic "I". Voltage in ex-
cess of 9 V
may cause internal damage.
16. TONE DET Logic Output (Active Low)
This open-collector output can sink about
100 rnA, and is activated when the internal
CTCSS detects a valid CTCSS
tone at the
demod ulator.
1-13

VXR-SOOO
17. TONE OFF Logic Input (Active Low)
This input is internally pulled up to 5-V
DC.
When pulled low by an external de-
vice,
it disables the internal CTCSS de-
coder (if enabled). The internal CTCSS
encoder section is not affected by this in-
put. Use this
input when channelmonitor-
ing
with squelch action is required (e.g.
tone
monitor function). Voltage in excess
of5 V
on this pin may damage the CPU on
the repeater CNTL-1 Unit.
18. TX Logic Ouput (Active Low)
This open-collector logic output is pulled
low
when the transmitter is activated. It
can sink approx. 100 mAo The signal on
this
pin is always true when the transmit-
ter is on.
It is intended to be used where an
"ON-AIR" indication is required.
19. AUDIO MUTE Logic Input (Active Low)
This input is internally pulled up to 5-V
DC. When pulled low by an external de-
vice, it disables receiver
output to pins 5 &
6 of the modular LINE jack. In the RE-
PEATER mode, the repeat audio is not af-
fected
by signals on this pin. Avoidvoltage
in excess of 5 V on this pin or internal
damage to
the CPU on the repeaterCNTL-
1 Unit
may result.
20. SQ LOW Logic Input (Active Low)
This input is internally pulled up to 5- V
DC.
When pulled low by an external de-
vice itselects
the lowsquelchmode. In low
squelch mode, the hysteresis between
squelch open and closed is only 3 dB (in-
stead
of the normal 6 dB). The squelch
closing level is unchanged.
The absolutesquelch closing level is set
by
VR4001 on the RX Unit. Forexample, if the
squelch
on the RX Unit has been set to
open at -110 dBm in normal mode, then
1-14
with the sa LOW pin grounded, the
squelch will now open at about -113 dBm.
In eithercase, the squelchwillclose at -116
dBm. Avoidvoltage in excess of 5V on this
pin, which could
damage the CPU on the
repeater CNTL-1 Unit.
21,22 & 23. REMOTE DO, DI & D2 Logic Inputs
(Active
Low)
These inputs are internally pulled up to
5-V DC.
When pulled low by an external
device, theyselect
one of the eight pre-pro-
grammed repeater operating channels.
Thelogic truth tablebelow shows the com-
binations for selecting all 8 channels.
In the
truth table, "I" represents no con-
nection,
and "0" represents a ground con-
nection
on the pin.
Thechannelselection logic is
not inhibited
while
the transmitteris keyed: the repeater
will change frequency
when instructed,
even while transmitting.
Avoid voltage
in excess of 5 V on these
pins or internal
damage to the CPU on the
repeater CNTL-1
Unit may result.
VXR-5000 Channel Access
(DO-D2, pins 21,22 & 23)
CH
02 01 DO
1 1 1 1
2 1 1 0
3 1 0 1
4 1 0 0
5 0 1 1
6 0 1 0
7 0 0 1
8 0 0 0
24 & 25. RST + & RST- Logic Inputs
An opto-isolated RESET input is pro-
videdbetween pins 24 and 25. A voltageof
between 3
and 15 V resets the repeater
microprocessor.

VXR-5000 Line Interface Port
The VXR-5000 is provided with an 8-pin
modular jackfor lineinterfacingapplications.
A Western Electric
modular-type RJ45 plug
should be used to connect to the jack. The
LINE jack provides -10 dBm line-level audio
for two uses:
• Provides an impedance-balanced, 4-wire
audio port with E+M auxilliarysignalling.
• Provides audio for SINAD meter connec-
tion
during alignment procedures (see
diagram on page 4-1).
LINE jack pin-out is shown below.
Note that there are both 4-line and 8-line
types of
modular plugs. If a 4-pin modular
plug is used, only the LINE OUT and LINE IN
connections will be made. An 8-pin plug is
required
to access all lines. In accordance
with standard telecommunications interfac-
ing, thelineconnections
on the LINE interface
jack are
impedance balanced, and are de-
scribed as follows:
Pins 1 & 2. RX SQ+, RX SQ-
An opto-isolator is provided to facilitate E
signaling (EAR). The opto-isolator comes
on when a signal exceeding the receiver
squelch
appears on the receiver channel
(with correct CTCSS tone, if enabled). The
RX Sa- pin is the emitter, and RX SQ+ is
the collector.
VXR-5000
Pins 3 & 4. LINE IN Tx Line Audio
Analog signals between 300 and 3000 Hz
supplied to this pair are fed to the trans-
mitter
when the repeater is set to the BASE
mode (ACC connector, pin 13 grounded)
and keyed either by the TX KEY input
signal (see below), or by the PTT signal on
pin 12 of the ACC jack. Full system devia-
tion is obtained
with a line level of -10
dBm.
Pins 5 & 6. LINE OUT Rx Line Audio
Receiver audio is available from this pair,
subject
to internal CTCSS decode if the
received signal strength is above the
squelch threshold. Receiver audio can be
monitored by activating the NSQ OFF sig-
nal on pin 10 of the ACC jack.
As
shipped from the factory, a I-kHz re-
ceiver signal
with full system deviation
gives
-10 dBm on the line, but this can be
varied over the range -55 dBm to +10 dBm
by VR2006 and S2004 on the repeater
CNTL-2 Unit.
Pins 7 & 8. TX KEY+, TX KEY-
An opto-isolatoris provided to facilitateM
signalling (MIC). That is, a voltage pre-
sented
to these pins turns on the opto-iso-
lator and keys the transmitter. The TX
KEY + pin is the anode of the opto-isolator
and TX KEY-is the cathode.
Socket J8201
Instruction Manual
1 Rx Sal +
2 Rx SQl-
.3 Line IN
4 " "
5 Line OUT
6 " "
7 Tx Key +
8 Tx Key-
LINE jackpin-out
1-15

VXR-5000
Cover Removal and Unit Access
The VXR-5000 repeater uses professional
modular card-style unit construction and
mounting. Major units are secured in a mini-
ature
rack-mount cage for easy access and
servicing. Each unit can be removed by un-
screwing
the mounting-tab screws, unplug-
ging the cables to the unit, then sliding the
unit out from the chassis. Plastic guide rails
on the chassis
body ensure positive insertion
and
support the units firmly in place.
Opening the Repeater Cabinet
o To remove the cover, remove the 4 screws
as
shown below and lift the cover off. :Jnit
identification and locations are shown be-
low.
-. .. . ... ~ , Q \oj
(j~.
.61
TX UNIT
CNTL UNIT
RX UNIT
D-SUB UNIT
Control Unit Access
o Remove the two screws from the Control
Unit mounting tabs to loosen it from the
chassis.
CNTL Units 1 &2
TX Unit Access
o Remove 4 screws from the TX unit mount-
ing tabs to loosen it from the chassis.
o Remove the 10 screws affixing the top
cover,
and lift itoff (note the type of screws
used) to expose the veoUnit.
CAPA U NIT REG UNIT
Unit Loc ation & Identifica tion
1-16

RPP Pr ogram mi ng Software In struction VXR-5000
o This completes normal disassembly for
servicing, to completely
remove the unit,
disconnect the
TX coaxial cable from the
BNC jack,
and unplug the two cables lead-
ing to
the CNTL Unit from J3001 & J3002.
TX Unit
RX Unit Access
o This unit is removed in the same manner
as described for the TX Unit. Control Unit
cables connect to J4001 & J4002. To com-
pletely
remove the unit, disconne.ct the co -
axial cable
leading to the RX ANT Jack from
the
ENe jack.
RX Unit
Instruction l rIanual
PA Unit Access
o First remove the 6 large screws affixing the
heat sink/?A Unit to the chassis. Loosen
the
heat sink unit from the chassis.
; 1 ~
o Ne xt remove the TX ANT cable from the
BNe COnT'.ector on the TX Unit, and re-
move the 8 screws affixing the top cover to
expose
the PA Unit (see below).
TX PA Unit
'~-17

VXR-5000
Notes:
1·18