Yaesu VXR7000 User Manual
Desktop Repeater
VXR-7000 (UHF)
Service Manual
©2006 VERTEX STANDARD CO., LTD. (E136890B)
VERTEX STANDARD CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
VERTEX STANDARD
US Headquarters
10900 Walker Street, Cypress, CA 90630, U.S.A.
YAESU EUROPE B.V.
P.O. Box 75525, 1118 ZN Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
VERTEX STANDARD HK LTD.
Unit 5, 20/F., Seaview Centre, 139-141 Hoi Bun Road,
Kwun Tong, Kowloon, Hong Kong
Introduction
This manual provides technical information necessary for servicing the VXR-7000 FM Land Mobile Repeater.
Servicing this equipment requires expertise in handling surface-mount chip components. Attempts by non-qualified
persons to service this equipment may result in permanent 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 the repeater. Each side of is referred to
by the type of the majority of components installed on that side (“leaded” or “chip-only”). In most cases one side has only
chip components, and the other has either a mixture of both chip and leaded components (trimmers, coils, electrolytic
capacitors, ICs, etc.), or leaded components only.
While we believe the technical information in this manual to be correct, VERTEX STANDARD assumes no liability
for damage that may occur as a result of typographical or other errors that may be present. Your cooperation in pointing
out any inconsistencies in the technical information would be appreciated.
Contents
Operating Manual Reprint............................ 2
CE27 Programming Software Instruction ...........................
10
Specifications ................................................. 16
Exploded View & Miscellaneous Parts .... 17
Block Diagram ............................................... 21
Interconnection Diagram............................. 24
Circuit Description ...................................... 25
Alignment ....................................................... 28
Board Unit (Schematics, Layouts & Parts)
PA Unit (Lot.1-17, 18, 19-61) ..................................... 33
PA-2 Unit (Lot.62-) ..................................................... 41
TX Unit (Lot.1-59) ................................................... 49
TX-2 Unit (Lot.60-) .................................................57
RX Unit (Lot.1-59)................................................... 65
RX-2 Unit (Lot.60-) ................................................. 75
CNTL Unit ............................................................... 85
Display Unit .......................................................... 103
Key Unit ................................................................. 107
Filter Unit (50W Type) ......................................... 113
Filter-2 Unit (25W Type) ..................................... 119
SW Unit (25W Type) ............................................ 125
VR Unit .................................................................. 127
SQL Unit ................................................................ 128
PS Unit ................................................................... 129
1
Operating Manual Reprint
Controls & Connectors
Front Panel
POWER Switch
This is the main power switch for the repeater.
LED Indicators
AC: This LED glows green during AC operation.
DC: This LED glows yellow during DC operation.
MIC Jack
This 8-pin modular jack accepts the microphone input, and provides a standby control line to activate the
transmitter when using the “BASE” mode of operation. This jack also provides a “Hook” control line, as
well as a “Clone Data” line.
BASE/REPEATER Switch
This switch toggles the operating mode between the
“REPEATER” mode and the “BASE” transceiver
mode. When the “REPEATER” mode is selected, the
LED above it glows green. While in the “BASE” mode
(the green LED is off), you can speak into the microphone to use it as a transceiver. For normal repeater
operation, set this switch to the “REPEATER” mode.
LOCAL/REMOTE Switch
This switch toggles the control mode between the “RE-
MOTE” mode and “LOCAL” mode. When the “LOCAL” mode is selected, the LED above it is off, and
the repeater operates according to the control data programmed into the repeater. While in the “REMOTE”
mode, the LED glows green, and the repeater operates according to the control instructions received from
an external device (connected to the ACC jack on the
rear panel).
MONITOR Switch
This switch selects the “Squelch” (receiver mute)
mode. When the green LED above it is off, “Tone” or
“Coded” squelch is active. When you press this switch
momentarily, the green LED will glow steadily; in this
condition, only “noise squelch” is active, and any signal present on the channel will be heard. If you press
and hold this switch for more than 2 second, the green
LED will blink and the squelch will open; in this condition, background noise will be heard if no signal is
present.
ACCESSORY Switch
This switch can be set up for special applications, such
as High/Low power selection, as determined by your
Vertex Standard dealer. The LED above it glows green
when this function is activated. For further details, contact your Vertex Standard dealer.
VOL Knob
This control knob adjusts the receiver volume level
from the front panel speaker. If desired, this control
knob may be set fully counterclockwise when repeater
monitoring is not needed.
SQL Knob
This control knob selects the noise squelch threshold
level. Set it to a position just above the point where
the BUSY lamp goes out when no signal is present.
Channel Selector Buttons ( and )
Press one of these buttons to select the operating channel.
Channel Indicator
This seven-segment LED indicates the operating channel number.
2
ANI Display
The ANI LCD (Liquid Crystal Display) indicates the
pre-programmed ANI message according to the ANI
code received.
Operating Manual Reprint
ANI RESET Button
(1) ANI
Press this button to clear the message on the ANI
display, and turn off the LCD backlight.
TX/BUSY Indicator
The BUSY indicator glows green when the channel is
busy, and the TX indicator glows red when the repeater
is transmitting.
Rear Panel
(2) ENI
Press this button to turn off the Alert tone.
Press this button again to clear the message on the
ANI display, and turn off the LCD backlight.
EXT SP Jack
This 3.5-mm, 2-pin jack provides variable audio output for an external speaker. The audio output impedance at this jack is 4 Ω ~ 16 Ω, and level varies according to the setting of the front panel’s VOL control.
TX Antenna Jack
This N-type coaxial jack provides the transmitting output signal for connection to the transmitting antenna
or TX jack on the duplexer, if used. The output impedance requirement is 50 Ω.
RX Antenna Jack
This N-type coaxial jack accepts the receiver input
signal from the receiving antenna or RX jack on the
duplexer, if used. The input impedance requirement is
50 Ω.
ACC Jack
This DB-25 connector provides a data interface between the microprocessor in the VXR-7000 and peripheral devices (such as the VX-TRUNK Unit).
LINE Jack
This 8-pin modular jack is used for remote control. It
provides TX and RX audio, TX keying, and squelch
status output. The TX and RX audio impedance is 600
Ω.
GND Terminal
For best performance and safety, the GND terminal
should be connected to a good earth ground using a
short, heavy, braided cable.
AC Jack
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 repeater is wired.
BATT Terminal
These terminal posts accept 12~ 15 VDC 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 (minimum)
is recommended for short-term emergency/backup operation.
3
Operating Manual Reprint
ACC Connector Port
The VXR-7000 repeater is provided with a 25-pin DB25F female connector for interconnections to accessories. Use a DB-25M 25-pin male connector to connect
accessories to the repeater. The pins on the accessory connector are explained in detail as follows:
Pin 1: GND
Chassis ground for all logic levels and power supply
return.
Pin 2: +13.8 V [Power Supply]
This pin provides 13.8 Volts, 1.0 A, regulated DC from
the repeater supply. Use a 1 A fuse in the external
device’s DC line to prevent damage to the repeater.
Pin 3: TX AF IN [Analog Transmitter Input]
(Voice Band: 300 ~ 3,000 Hz)
Input impedance is approx. 600 Ω. This audio is injected before the splatter filter stage, so excess signal
input levels are clipped.
Use shielded cable to connect to this pin, and connect
the shield to GND.
Pin 4: TONE IN [Transmitter Input]
(Sub-audible Band: 6 ~ 250 Hz)
The input is high impedance (approx. 22 kΩ). Injecting too high a voltage here causes over-deviation of
CTCSS or DCS, degrading performance. Use shielded
cable to connect to this pin, connecting the shield to
GND.
Pin 5: N.C. (No connection.)
Pin 6: DISC OUT [Analog Output]
(Wide-Band: 0 ~ 3,000 Hz)
Received signals with standard deviation produce
approx. 1 Vp-p audio at this pin. The output impedance is approx. 600 Ω, and is extracted before the deemphasis and squelch circuitry. Use shielded cable to
connect to this pin, and connect the shield to GND.
Pin 7: GND
Chassis ground for all logic levels and power supply
return.
Pin 8: RSSI [Analog Output]
A DC voltage proportional to the strength of the signal currently being received (Receiver Signal Strength
Indicator) is provided on this pin. This low impedance output is generated by the receiver IF sub-system and buffered by an internal op-amp. Typical voltages are graphed as follows:
Pin 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 approx. 10 mA when active. This signal only switches if the repeater has been programmed
for “SIMPLEX” mode. If programmed for “DU-
PLEX,” the signal remains open (high impedance) at
all time.
Pin 10: N.C. (No connection.)
Pin 11: NSQ DET
This is an open-collector, active-low output capable
of sinking about 10 mA. It indicates that the receiver
squelch is open. If the squelch control is properly set,
this indicates a carrier on the receiver channel.
ACC Jack
DB-25 Pin Numbering
4
Operating Manual Reprint
Pin 12: EXT PTT
This input is internally pulled up to 5 VDC. When
pulled low by an external device, it keys the repeater
transmitter while the repeater is operating in the
“BASE” mode. Avoid voltage in excess of 5 V on this
pin, or internal damage to the microprocessor on the
repeater CNTL Unit may result.
Pin 13: GND
Chassis ground for all logic levels and power supply
return.
Pin 14: GND
Chassis ground for all logic levels and power supply
return.
Pin 15: N.C. (No connection.)
Pin 16, 17, 18, & 19: REMOTE CH DATA
[Logic Inputs D3, D2, D1, and D0] (Active Low)
These inputs are internally pulled up to 5-V DC. When
pulled low by an external device, they select one of
the 16 pre-programmed repeater operating channels.
The logic truth table below shows the combinations
for selecting all 16 channels.
In the truth table, “1” represents no connection, and
“0” represents a ground connection on the pin.
The channel selection logic is not inhibited while the
transmitter is 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 microprocessor on the repeater
CNTL Unit may result.
Channel
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Pin 16
(D3)
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Pin 17
(D2)
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
Pin 18
(D1)
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
Pin 19
(D0)
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Pin 20: GND
Chassis ground for all logic levels and power supply
return.
Pin 21: A-OUTPUT [Logic Output] (Active Low)
This open collector logic output is pulled low when
the front panel’s ACCESSORY key is turned on. It
can sink approx. 10 mA when active.
Pin 22: RXD LOW
[Digital Output for DATA Communications]
(300 ~ 3,000 Hz)
This pin is an output for low speed receiving data signals, with the data being extracted after the de-emphasis and low pass filter stages.
Pin 23: RXD HI
[Digital Output for DATA Communications]
This pin is an output for high speed receiving data
signals, with the data being extracted immediately after the discriminator prior to any de-emphasis).
Pin 24: TXD LOW
[Digital Input for DATA Communications]
(300 ~ 3,000 Hz)
This pin is intended to be used as a low speed digital
data signal input to the repeater. This digital data signal is injected before transmitter pre-emphasis and limiting stage, so excess signal input levels are clipped.
Pin 25: TXD HI
[Digital Input for the DATA Communications]
This pin is intended to be used as a high speed digital
data signal input to the repeater. This digital data signal is injected after transmitter splatter filter stage.
5
Operating Manual Reprint
LINE Interface Port
The VXR-7000 is provided with an 8-pin modular jack
for line interfacing applications. A Western Electric
lar-type RJ45 plug should be used to connect to this jack.
The LINE jack pin-out is shown below.
Note that there are both 4-line and 8-line types of modular
plugs. If a 4-line modular plug is used, only the LINE
OUT and LINE IN connections will be made. An 8-line
plug is required to access all lines. In accordance with
standard telecommunications interface, the line connections on the LINE interface jack are impedance balanced,
and are described as follows.
Pins 1 & 2: [RX SQ(+), RX SQ(–)]
(max voltage: 20 V, max current: 7 mA)
An opto-isolator is provided to facilitate E (EAR) signaling. The opto-isolator comes on when a signal exceeding the receiver squelch appears on the receiver
channel (with correct CTCSS tone or DCS code, if
enabled). The RX SQ(–) pin is the emitter, and RX
SQ(+) is the collector.
Pins 3 & 4: [LINE IN (Tx Line Audio)]
Analog signals between 300 and 3000 Hz supplied to
this pair are fed to the transmitter when the repeater is
set to the BASE mode (the REPEATER LED is turned
off) and keyed either by the TX KEY input signal (see
below), or by the EXT PTT signal on pin 12 of the
rear panel’s ACC jack. Standard deviation 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 or DCS decode if the received signal
strength is above the squelch threshold.
As shipped from the factory, a 1-kHz receiver signal
with standard deviation gives –10 dBm on the line,
but this can be varied by VR4002 and S4001 (on the
repeater’s CNTL Unit).
Pins 7 & 8 [
(max voltage: 20 V, max current: 4 mA)
An opto-isolator is provided to facilitate M (MIC) signaling. That is, a voltage presented to these pins turns
on the opto-isolator and keys the transmitter. The TX
KEY(+) pin is the anode of the opto-isolator, and RX
SQ(–) is the cathode of the opto-isolator.
( ), ( )]
®
modu-
Installation
Antenna Considerations
Repeater operation without a duplexer requires that two
antennas be installed, one for receiving and one for transmitting, so that the receiving antenna does not absorb energy from the transmitting antenna. There are a number of
ways to do this, depending on the TX/RX frequency separation, and on the locations 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-cavity model (minimum) is recommended.
Vertex Standard recommends the use of the duplexer. For
further details, contact your Vertex Standard dealer.
Regardless of the above choice, it is of paramount importance that the antenna(s) be mounted as high and in the
clear as possible, preferably within line-of-sight to all repeater users. Furthermore, losses in the feedline(s) must
be minimized, so the feedline(s) should be high quality,
and as short as possible. If a long feedline is necessary,
use coaxial “hardline” cable to reduce losses.
Repeater antennas should have an impedance of 50 W at
the operating frequency. When separate receive and transmit antennas are used, high-Q narrow-band types may
serve to minimize interaction. However, when a single antenna is used with a duplexer, it should be a low-Q wideband type.
NEVER TRANSMIT WITHOUT HAVING A
TRANSMIT ANTENNA CONNECTED TO THE
TX ANTENNA JACK OF THE REPEATER.
AC Power Supply Voltage Selection
Each repeater is wired for a particular AC mains voltage
between 100 and 253 VAC. This should be indicated by a
label near the AC jack on the rear panel. If no label is
present, or if the AC voltage on the label is different from
the local AC line, check the wiring inside the Switching
Regulator Unit of the repeater, and change the connections (and label) if necessary, as shown next page.
Changing the AC input voltage wiring also requires changing the fuse on the FILTER Unit if the voltage is changed
from 100 VAC (100-127 VAC) to 200 VAC (207-253
VAC), or vice-versa. Use a 5-amp fuse for 100 VAC, or a
3-amp fuse for the 200 VAC.
LINE Jack
Modular Jack Pin Numbering
6
Operating Manual Reprint
DC Power Supply Backup
For uninterrupted operation during power failures, a 12
volt rechargeable type battery (55-Ah or more recommended) may be connected to the BATT terminal posts
on the rear panel. While the repeater is operating from the
AC source, a slight charging current will maintain battery
charge. In the event of an AC power outage, the automatic power control circuit will automatically switch the
repeater to the backup battery, and operation will not be
interrupted.
After prolonged operation from the battery, it should be
disconnected from the repeater and recharged separately
before re-connecting, as the trickle charge is not sufficient
for recharging a completely discharged battery.
Never reapply AC power to the repeater with a discharged
battery connected, as the DC startup current can damage the repeater and battery.
While operating from a battery or DC supply, the repeater
requires approximately 7 amperes at 12 Volts during transmit.
Equipment Location
While the operating temperature range of the repeater is
quite broad, the best location is one in which the air temperature does not approach the extremes of the specified
range, and one that does not change rapidly. Make sure to
allow for free air flow 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 equipment. Try to locate the repeater in an environment that is also comfortable for
service personnel, if possible.
7
Operating Manual Reprint
Changing Switching Regulator unit AC Mains Jumper Wiring
Before attempting this jumper wire change, remove the
AC power cord from the AC jack on the rear panel.
Referring to Figure 1, remove the 14 screws affixing
the top and bottom covers of the repeater, and remove
the covers.
Remove the eight screws affixing the shield cover for
the FILTER Unit, and remove the cover (see Figure
1).
Disconnect all wires and connectors from the FILTER
Unit, then remove the six screws affixing the Switching Regulator Unit, and remove it (the Switching Regulator Unit is mounted with the FILTER Unit: Figure
2).
Referring to Figure 3, remove the four screws and re-
move the heatsink from the Switching Regulator Unit.
Referring to Figure 4, perform the correct jumper wir-
ing on the Switching Regulator Unit for the AC Mains
voltage used in your area (100-127 VAC or 207-253
VAC).
Replace the heatsink onto the Switching Regulator
Unit, then replace the Switching Regulator Unit onto
the chassis, and connect all wires and connectors to
the FILTER Unit.
Replace the AC fuse (FH6001) on the FILTER Unit
according to the AC Mains voltage range:
100 VAC (100-127 VAC): 5A
200 VAC (207-253 VAC): 3A.
Replace the shield cover and replace the top and bot-
tom covers. This completes the wiring change.
Important!: If you change the AC voltage range, you must
also change the AC fuse on the FILTER Unit. Do not replace with a slow-blow type fuse.
FILTER Unit
B
A
B
C
Figure 2
Switching
Regulator
Unit
A
Figure 1
8
Operating Manual Reprint
Switching Regulator Unit
Figure 4
Figure 3
9
Operating Manual Reprint
CE-27 Programming Software Instruction
With the CE27 Programming Software, you can quickly
and easily program the Vertex Standard VXR-7000
repeater’s channels and configuration from your personal
computer. In the event of an accidental memory failure,
repeater memory and configuration data may be re-loaded
in a matter of minutes.
The CE27 Programming Software diskette contains the
following files:
• CE27.EXE
• CE27.HLP
Before connecting the VXR-7000 for programming, turn
off both the computer and the VXR-7000. Now connect
the VPL-1 Connection Cable to the computer’s serial port
and the VXR-7000.
Then it will be safe to restart the computer; turning off the
equipment during interconnection avoids the potential for
damage to the electronics caused by voltage spikes.
Insert the distribution diskette into your 3½” drive (after
booting DOS), and make a copy of the diskette; use the
distribution diskette for archive purposes, and use the disk
copy for programming.
Place the CE27 (copy) diskette into your 3½” drive (usually “Drive A”), and log onto this drive by typing “A:
[E
NTER]”, then load the contents of the CE27 diskette into
a directory named CE27, using the COPY command (e.g.
“COPY A:*.* C:\CE27”).
Now type “CE27 [E
troductory screen will appear, and you may press any key
to enter the main screen.
Choose the “Help” contents option (F1) from the program’s
Menu for assistance with channel programming or setting
of parameters.
Do not run the CE27 programming software di-
rectly from the original distribution diskette.
Copy the programming software to your
computer's hard disk, then run the software from
the hard disk only. Keep the original distribution diskette in a safe place in case you need to
make another copy of it at a later date.
Before creating the programming data for your
VXR-7000 via the CE27 programming software,
upload the current factory hardware environment data from the VXR-7000, using the [F5]
(ReadRom) command. Use this data profile to
create the programming data for this repeater.
NTER]” to start the program. The in-
Important Note!
10
VXR-7000 Programming Setup
CE27 Main Screen (Left)
Operating Manual Reprint
Channel Data Items
Ch: Channel Number
This 2-digit number (01 - 16) is used to identify the channel. Channel numbers occur in sequence, and their order
can not be changed.
Rx Freq.: Edit Receive (or simplex) Frequency
Use the [0] - [9] keys to enter the desired channel frequency directly, and press the [E
CTCSS Decoders: Toggle CTCSS Decoder ON/OFF,
sets CTCSS Frequency
Press the [S
or “off,” or press the [E
PACE] bar to toggle the CTCSS Decoder “on”
NTER] key to display the “TONE
SELECT” window, from
which you may select a
CTCSS frequency using the
[A
RROW] key; press [ENTER]
again to accept the selected
tone, or press [E
SC] key to
cancel.
DCS Decoders: Toggle DCS Decoder ON/OFF, sets
DCS Code #
Press the [S
PACE] bar to toggle the DCS Decoder ON or
OFF, or press the
[E
NTER] key to
display the
“C
ODE SELECT”
window, from
which you may
select a DCS
code using the [A
RROW] key; press [ENTER] again to ac-
cept the selected code, or press the [E
NTER] key.
SC] key to cancel.
W/N: Wide/Narrow Channel Spacing
This function selects the channel spacing environment in
which the VXR-7000 operates.
W (Wide) = 25 kHz Channel Spacing, ±5 kHz De-
viation.
N (Narrow) = 12.5 kHz Channel Spacing, ±2.5 kHz
Deviation.
Press the [S
PACE] bar to select the desired channel spac-
ing environment.
Clk Sft: Enable/disable the CPU Clock Shift
This function is only used to move a spurious response
“birdie” should it fall on a current frequency.
Press the [S
PACE] bar to toggle “yes” or “no.”
NSQ Mode: Noise Squelch Mode
This command selects the manner of setting of the Squelch
threshold level.
User = The squelch threshold level is fixed via the
“NSQ Lv” parameter (NSQ Lv: 0 [min.] ~
255 [max.]).
Prpgm = The squelch threshold level deter-
mined via the dealer programming.
Press the [S
PACE] bar to select the desired NSQ Mode.
NSQ Lv: Noise Squelch threshould level
Use the [0] - [9] keys to enter the desired Squelch threshold level directly, and press the [E
NTER] key. Available
values are 0 (min.) ~ 255 (max.).
CE27 Main Screen (Scrolled Right)
11
Operating Manual Reprint
Court Blip: Courtesy Blip
When this parameter is set to “on,” this function causes
the VXR-7000 to send out a “blip” on the portable/mobile
radio is frequency each time the portable radio is unkeyed.
This provides audible confirmation to the user that the
VXR-7000 was able to receive the transmission from the
portable.
Press the [S
PACE] bar to toggle “on” or “off.”
Rev Bst: Reverse Burst.
When this parameter is set to “on,” the CTCSS tone
signal’s phase is inverted just before the repeater turns to
receive. This allows the portable/mobile station’s CTCSS
Decoder to begin switching off, thus reducing the transition time required.
Press the [S
PACE] bar to toggle “on” or “off.”
DCS Typ: DCS Format
This command is effective only when DCS is chosen for
squelch control.
A = “Normal” DCS
B = “Inverted” (complement) DCS
Press the [S
PACE] bar to select the desired DCS Type.
DDec Type: DCS Decoder Type
This command selects the manner in which DCS is to be
decoded.
Fixed = Decodes only the type selected in above pa-
rameter (DCS Typ: Normal or Inverted).
Auto = Both types (Normal and Inverted) will be de-
coded.
Press the [S
PACE] bar to select the desired DCS Decoder
Mode.
Multi Tone: Enable/disable Multi Tone Operation
Press the [S
PACE] bar to toggle Multi Tone Operation be-
tween selections “yes” and “no.”
Press the [E
display the “M
NTER] key to
ULTI TONE
SELECT” window, from
which you may select a
CTCSS tone or DCS
code; move the cursol to
the appropriate field
you using the [A
open the “T
select the desired CTCSS tone or DCS code using the [A
ROW] key, then press the [ENTER] key again to accept the
selected tone or code, or press the [E
RROW] key, then press the [ENTER] key to
ONE SELECT” or “CODE SELECT” window. Now
R-
SC] key to cancel.
You may set as many as 16 CTCSS tones and/or DCS
codes.
Note that, if you do not yet program a CTCSS tone or
DCS code in the “M
the “M
ULTI TONE SELECT” window data is not pro-
grammed), press the [S
ULTI TONE SELECT” window (when
PACE] bar to display the “MULTI
TONE SELECT” window directly.
CWID ANI/ENI: Select the Identifier mode
Press the [S
PACE] bar to toggle the selections “CW ID,”
“ANI/ENI,” or “off.” To select this feature to the “CW
ID” or “ANI/ENI,” the “CW ID” parameter must be en-
abled via the dealer programming.
Action Mode: Select the repeater operation mode
Press the [S
PACE] bar to toggle between “Duplex” opera-
tion or “Simplex” operation.
Tx Freq.: Edit Transmit Frequency
Use the [0] - [9] keys to enter the desired channel frequency directly, and press the [E
NTER] key.
CTCSS Encoders: Toggle CTCSS Encoder ON/OFF,
sets CTCSS Frequency
Press the [S
or “off,” or press the [E
PACE] bar to toggle the CTCSS Encoder “on”
NTER] key to display the “TONE
SELECT” window, from
which you may select a
CTCSS frequency using the
[A
RROW] key; press [ENTER]
again to accept the selected
tone, or press the [E
SC] key
to cancel.
DCS Encoders: Toggle DCS Encoder ON/OFF, sets DCS
Code #
Press the [S
“off,” or press the [E
LECT” window,
PACE] bar to toggle the DCS Encoder “on” or
NTER] key to display the “CODE SE-
from which you
may select a DCS
code using the
[A
RROW] key;
press [E
NTER]
again to accept
the selected code, or press the [E
SC] key to cancel.
Base TOT: Enable/disable the Time-Out Timer while in
the “BASE” station mode
Press the [S
PACE] bar to toggle the TOT feature selects
“yes” and “no.”
The TOT time is determined via dealer programming.
Base Guard: Enable/disable the Base Guard Feature
When this parameter is set to “yes,” the transmitter will
be inhibited for a few seconds before the repeater (in the
“BASE” station mode) turns to receive.
The inhibit time is determined via dealer programming.
LOUT: Select the Lock Out Feature’s mode
Press the [S
tween “BCLO,” “BTLO,” or “off,” then press the [E
TER] key to accept the setting. “BCLO” inhibits transmit-
PACE] bar to toggle the Lock Out Feature be-
N-
ting while there is carrier present. “BTLO” inhibits transmitting while there is carrier present unless there also is a
valid tone present.
12
Operating Manual Reprint
TX Pwr: Transmitter Power Output Selection
This parameter selects the desired power output from the
VXR-7000 on the current channel. The available values
are HIGH and LOW.
Press the [S
PACE] bar to select “Hi” or “Lo.”
TOT Mute: Enable/disable the TOT (Time-Out Timer)
beep monitoring
When this parameter is set to “on,” the alert beep will
sound from the front panel speaker before the repeater
turns itself off.
RptTOT Use: Enable/disable the Time-Out Timer while
operating in the repeater mode
Press the [S
PACE] bar to toggle the Repeater TOT selects
“yes” or “no.”
The TOT time is determined via dealer programming.
RptTOT Beep: Enable/disable the TOT beep Transmis-
sion
Press the [S
PACE] bar to toggle the TOT beep selects “yes”
or “no.”
When this parameter is set to “yes,” the alert beep will be
sent out on the air before the repeater turns itself off, while
oprtating in the “REPEATER” mode.
RPT HT: Enable/disable the Repeater Hang-on Timer
Press the [S
PACE] bar to toggle the Repeater Hang-on Timer
selects “yes” or “no.”
When this parameter is set to “yes,” the repeater will remain keyed for a desired seconds after a receiving carrier
is dropped.
The Hang-up time is determined via dealer programming.
RPT GT: Enable/disable the Repeater Guard
When this parameter is set to “yes,” the transmitter inhibit few second before the repeater is unkeyed.
The inhibit time is determined via dealer programming.
13
Operating Manual Reprint
Duplexer Installation
Important Notes!
Please refer to the operating manual for your Duplexer for details regarding maximum power input, TX/RX connector locations, etc) before installing the Antenna Duplexer.
Be certain to observe and comply with the specifications for frequency separation and maximum
transmitter power for the duplexer connected to
the VXR-7000, particularly when using the VXD40xx internal duplexer. When the VXD-40xx is
used, the frequency separation must be 5 MHz
(minimum) to 10 MHz (maximum), and the
maximum transmitter power output allowed is
40 Watts.
If the VXR-7000 output power (50 Watts) is in
excess of the range of the duplexer's capability,
you may reduce the TX output power of the
VXR-7000 before installing the Antenna Duplexer, using the following procedure:
1. Connect the VXR-7000’s TX antenna port to a wattmeter and dummy load (the duplexer must not be connected at this point). Connect any Vertex Standard
microphone to the MIC jack, and place the BASE/
REPEATER switch in the “BASE” position. Select
Channel 1 for alignment purposes.
2. Press and hold in the ACCESSORY switch for two
seconds to enter the adjustment mode. The channel
number will begin to blink.
3. Press and hold in the PTT key on the microphone.
The display will indicate “Po” while transmitting. Observe the power output as indicated on the watmeter.
4. Press the (UP: increment) or (DOWN: decrement) button (to the right of the channel display) repeatedly to adjust the TX output power to 40 Watts
(or less) while holding in the PTT key.
5. Once the desired power level has been obtained, release the PTT key. Now press and hold in the AC-
CESSORY button for at least two seconds to save
the new setting and exit to the normal operation.
6. Repeat steps 2. through 5. (above) for any other channels (2 through 16) if they are to be used.
7. Re-test each channel in the normal operating mode to
confirm the proper power output. You may now disconnect all test equipment.
8. The duplexer may now be installed.
The above procedure should only be performed by your
Authorized Vertex Standard Dealer or a qualified radio
technician, in order to ensure accurate calibration. Please
consult with your Authorized Vertex Standard Dealer for
assistance with procurement of a suitable duplexer.
14
Operating Manual Reprint
Installations
1. Remove the 14 screws affixing the top and bottom covers of repeater, and remove the covers (Figure 1).
2. Turn the repeater upside down.
3. Referring to Figure 2, remove the upper screw in either side of the front panel, and loosen the lower screw
in either side of the front panel, then slide the front
panel forward slightly.
4. Remove the coaxial cables connected to the TX and
RX antenna jacks of the repeater.
5. Install the duplexer into the compartment on the bottom side of the repeater, using the four screws and
antenna cable provided in the CT-68 Hardware Kit
(Figure 3). Some duplexers may not line up with the
threaded mounting holes in the repeater's chassis. In
this case, use the supplemental mounting brackets supplied with the CT-68 Hardware Kit (Figure 4).
6. Connect the optional Antenna Cable CT-68 between
the TX antenna jack of the repeater and ANT (center)
jack of the duplexer.
7. If your repeater’s Tx/Rx frequency relationship is “upper shift” type (TXf > RXf), connect the coaxial cable
from the RX Unit to the LOW PASS jack of the duplexer and connect the coaxial cable from the PA Unit
to the HIGH PASS jack of the duplexer.
If your repeater’s Tx/Rx frequency relationship is
“lower shift” type (TXf < RXf), connect the coaxial
cable from the RX Unit to the HIGH PASS jack of the
duplexer and connect the coaxial cable from the PA
Unit to the LOW PASS jack of the duplexer.
Note: Route the TX coaxial cable from the PA Unit as
far as possible from the RX coaxial cable from the RX
Unit.
8. Duplexer installation is now complete. Replace the
front panel back into place, and replace the top and
bottom covers.
Bottom SideTop Side
Figure 1
Figure 3Figure 2
Bottom Side
Bottom Side
Figure 4
15
Specifications
General
Frequency Range: 400 ~ 430 MHz (A), 450 ~ 480 MHz (D), or 480 ~ 512 MHz (F)
Number of Channels:16
Channel Spacing: 12.5/25 kHz
Frequency Stability: ±2.5 ppm
Antenna Impedance: 50 Ω (N-Type)
Tx Activation System: Carrier-operated, CTCSS tone operated, DCS operated, or remote control
Power Requirements: 115/230 V AC ±10%, 50/60 Hz or 13.8 VDC
Ambient Temperature Range: –30 °C ~ +60 °C
Dimensions (w/o knobs): 325 x 115 x 391.5 mm (12.8 x 4.5 x 15.4 inches)
Weight (approx.): 10 kg (22 lbs.)
Receiver
Receiver Type: Double-conversion Superheterodyne
Sensitivity: 0.35 µV for 12 dB SINAD, 0.45 µV for 20 dB NQ
Selectivity: 75 dB
Intermodulation: 75 dB
Spurious & Image Rejection: 80 dB
Audio Output: 4 W @ 4 Ω
Transmitter
RF Output: 10 ~ 50 W (Adjustable)
Duty Cycle: 100 %
Maximum Deviation: ±5.0 kHz (25 kHz spacing), ±2.5 kHz (12.5 kHz spacing)
Modulation Type: 16K0F3E/11K0F3E
Audio Distortion: Less than 2.5 % @ 1 kHz
Spurious Emissions: Better than 75 dB below carrier
Specifications are subject to change without notice or obligation.
16
Exploded View & Miscellaneous Parts (Lot. 1-70)
Ref.
VTX P/N
U04308001
U30312012
U04408001
U30306012
U30314012
U30308012
U04306002
Description
SEMS SCREW HSM3×8
FLAT HEAD SCREW M3×12BSNI
SEMS SCREW HSM4×8
FLAT HEAD SCREW M3×6BSNI
FLAT HEAD SCREW M3×14BSNI
FLAT HEAD SCREW M3×8BSNI
SEMS SCREW HSM3×6NI
Qty.
5
1
4
9
5
2
12
S6000384
PCB SPACER (6pcs)
Q7000303 (VTX)
Q7000391 (EXP : CE ON)
Q7000427 (EXP : CE OFF)
POWER SUPPLY ASS’Y
S8001794
SPACER(5pcs)
S8001782
THERMAL CONDUCTOR(4pcs)
FILTER Unit
S8001784
FITTING(5pcs)
S8001786
COVER
S8000030
FITTING
S8001785
HEATSINK
S6000366
EDGE HOLDER
CNTL Unit
RA0181300
TOP CASE
RA018100A
SHIELD CASE COVER
S6000366
EDGE HOLDER
RA0180900
SHIELD CASE COVER (PA)
Q6000169
TERMINAL STRIP
S5000215
FAN GUARD
P0090811
CONNECTOR
Ref. VTX P/N Description Qty.
S5000182 SCREW JFS-4S-B1WM 2
U10306007 TRUSS HEAD SCREW M3×6B 14
U04408001 SEMS SCREW HSM4×84
U04308001 SEMS SCREW HSM3×82
U24306001 TAPTITE SCREW M3×634
U24308001 TAPTITE SCREW M3×818
U23308001 TAPTITE SCREW M3×81
U20406007 BINDING HEAD SCREW M4×6B 4
U20308002 BINDING HEAD SCREW M3×8NI 8
U20306001 BINDING HEAD SCREW M3×66
U04306002 SEMS SCREW HSM3×6NI 12
U02308002 SEMS SCREW SM3×8NI 2
U00206002 PAN HEAD SCREW M2.6×6NI 2
U00305001 PAN HEAD SCREW M3×52
U30308001 FLAT HEAD SCREW M3×84
U01330007 (Lot.~14) SEMS SCREW HM3×30B
U04335007 (Lot.15~) SEMS SCREW HSM3×35B
U52408002 HEX HEAD BOLT M4×8NI 1
U51416007 HEXA SOCKET BOLT M4×16B 2
U70004002 PLAIN WASHER FW4NI 1
U71004002 SPRING LOCK WASHER SW4NI 1
U72004002 TOOTHED LOCK WASHER OW4NI 1
U20308001 BINDING HEAD SCREW M3×83
4
Non-designated parts are available only
as part of a designated assembly.
RA018270B (Lot.23~)
RA018270A (Lot.1~22)
FRONT PANEL ASS’Y
RA0181500
PANEL FRAME
RA0180600
KNOB (POW)
RA0180500
VOLUME KNOB
N4090148 (Lot.11~)
N4090143 (Lot.1~10)
PUSH SWITCH
RA0180800
SHIELD CASE COVER (RF)
Display Unit
KEY Unit
RA0180700
PUSH KNOB (4pcs)
RX Unit
VOL Unit
SQL Unit
TX Unit
M4090066
SPEAKER
RA0065800
RUBBER HOLDER (SP)
RA0181200
HOLDER (MJ)
R3054370
FOOT (4pcs)
P1091073
CONNECTOR
P1091072
CONNECTOR
P9090014
M2090032
FAN
RA018000A (Lot.18~)
RA0180000 (Lot.1~17)
CHASSIS
P1090654
CONNECTOR
RA0181400
BOTTOM CASE
CONNECTOR (2pcs)
PA Unit
17
Note:
18
Exploded View & Miscellaneous Parts (Lot.71-)
Ref.
VTX P/N
U04308001
U30312012
U04408001
U30306012
U30314012
U30308012
U04306002
Description
SEMS SCREW HSM3×8
FLAT HEAD SCREW M3×12BSNI
SEMS SCREW HSM4×8
FLAT HEAD SCREW M3×6BSNI
FLAT HEAD SCREW M3×14BSNI
FLAT HEAD SCREW M3×8BSNI
SEMS SCREW HSM3×6NI
Qty.
5
1
4
9
5
2
12
S6000384
PCB SPACER (6pcs)
Q7000303 (VTX)
Q7000391 (EXP : CE ON)
Q7000427 (EXP : CE OFF)
POWER SUPPLY ASS’Y
S8001794
SPACER(5pcs)
S8001782
THERMAL CONDUCTOR(4pcs)
FILTER Unit
S8001784
FITTING(5pcs)
S8001786
COVER
S8000030
FITTING
S8001785
HEATSINK
S6000366
EDGE HOLDER
CNTL Unit
RA0181300
TOP CASE
RA018100A
SHIELD CASE COVER
S6000366
EDGE HOLDER
RA0180900
SHIELD CASE COVER (PA)
Q6000169
TERMINAL STRIP
S5000215
FAN GUARD
P0090811
CONNECTOR
Ref. VXSTD P/N Description Qty.
S5000182 SCREW JFS-4S-B1WM 2
U10306007 TRUSS HEAD SCREW M3×6B 14
U04408001 SEMS SCREW HSM4×84
U04308001 SEMS SCREW HSM3×82
U24306001 TAPTITE SCREW M3×634
U24308001 TAPTITE SCREW M3×813
U23308001 TAPTITE SCREW M3×81
U20406007 BINDING HEAD SCREW M4×6B 4
U20308002 BINDING HEAD SCREW M3×8NI 8
U20306001 BINDING HEAD SCREW M3×66
U04306002 SEMS SCREW HSM3×6NI 12
U24310001 TAPTITE SCREW M3×10 6
U34306001 TAPTITE SCRWE M3X6 2
U00305001 PAN HEAD SCREW M3×52
U30308001 FLAT HEAD SCREW M3×84
U04335007 SEMS SCREW HSM3×35B 4
U52408002 HEX HEAD BOLT M4×8NI 1
U51416007 HEXA SOCKET BOLT M4×16B 2
U70004002 PLAIN WASHER FW4NI 1
U71004002 SPRING LOCK WASHER SW4NI 1
U72004002 TOOTHED LOCK WASHER OW4NI 1
U20308001 BINDING HEAD SCREW M3×83
U20304001 BINDING HEAD SCREW M3×47
U20305001 BINDING HEAD SCREW M3X5 2
U32450001 FLAT HEAD SCREW M2.6X5 2
Non-designated parts are available only
as part of a designated assembly.
RA0180600
KNOB (POW)
RA018270B
FRONT PANEL ASS’Y
RA0180500
VOLUME KNOB
N4090148
PUSH SWITCH
RA0181500
PANEL FRAME
KEY Unit
RA0180800
SHIELD CASE COVER (RF)
Display Unit
VOL Unit
RA0180700
PUSH KNOB (4pcs)
RX Unit
SQL Unit
TX Unit
M4090066
SPEAKER
RA0065800
RUBBER HOLDER (SP)
RA0181200
HOLDER (MJ)
R3054370
FOOT (4pcs)
P1091073
CONNECTOR
P1091072
CONNECTOR
M2090032
FAN
PA-2 Unit
CS1861002
Heat sink PA-2 ASSY
RA018000A
CHASSIS
P1090654
CONNECTOR
RA0181400
BOTTOM CASE
P9090014
CONNECTOR (2pcs)
19
Exploded View & Miscellaneous Parts (Lot.71-)
Heat sink PA-2 ASSY (vxstd p/n: CS1861002)
Heat sink PA-2 ASSY
Main Heat Sink Plate
(No Part # and impossible to purchase this part only)
CS1861002
20
Rubber Spacer
RA0766400
Heat Sink Plate
RA0766900
Screws M2.6X5
U32450001
Block Diagram
21
Block Diagram
22
Block Diagram
23
Interconnection Diagram
24
Circuit Description
Receive Signal Path
Incoming RF from the RX antenna jack is delivered to
the RX Unit and passes through the protection diode D3001
(1SS302) and a varactor-tuned band pass filter consisting of coils L3002 and L3004, capacitors C3020, C3021,
C3024, C3025, and C3029, and diodes D3004 and D3007
(both HVU350). Signals are then applied to the RF amplifier, Q3005 (2SC3357). The amplified RF signal is
applied through a varactor-tuned band pass filter consisting of coils L3010 and L3012, capacitors C3048, C3052,
C3053, C3157 and C3158, and diodes D3019 and D3020
(both HVU350) to the first mixer D3011 (GN2011-Q)
along with the first local signal from the PLL circuit.
The first local signal is generated between 376.65 MHz
and 406.65 MHz by the RX VCO, which consists of FET
Q3008 (2SK508) and varactor diodes D3005, D3006,
D3008, and D3009 (HVU350) according to the pro-
grammed receiving frequency; the local signal then passes through buffer amplifier Q3009 (2SC5226) and first
local amplifier Q3011 (2SC3357) to the first mixer
D3011.
The 73.35 MHz first IF signal is applied to monolithic
crystal filters XF3001 and XF3002 (both 73S10A: ±5.0
kHz B.W.) which strip away unwanted mixer products,
and the IF signal is applied to the first IF amplifiers Q3014
and Q3017(both 2SC5226). The amplified first IF signal
is then delivered to the FM IF subsystem IC Q3012
(TA31136FN), which contains the second mixer, second
local oscillator, limiter amplifier, noise amplifier, and FM
detector.
The second local oscillator signal, generated by the
72.895 MHz crystal X3002, produces the 455 kHz second IF signal when mixed with the first IF signal within
Q3012. The second IF signal passes through ceramic filter CF3001 (CFWM455G: ±4.5 kHz B.W.) or CF3002
(CFWM455F: ±6.0 kHz B.W.) which strips away all but
the desired signal, and then passes through the limiter
amplifier within Q3012 to ceramic discriminator CD3001
(CDB455C7), which removes any amplitude variations
in the 455 kHz IF signal before detection of speech. The
detected audio passes through the low pass filter, consisting of R3066 and C3128, which rejects the 455 kHz IF
component, then delivers the audio to pin 12 of JP3001.
The audio signal from the RX Unit is delivered to the
CNTL Unit and passes through the audio amplifier Q4014-
3 (NJM2902) to the active high pass filter section of
Q4024 (FX-805) which rejects the sub-audible frequen-
cy component. The filtered audio signal is delivered to
potentiometer VR4001, which adjusts the audio sensitivity to compensate for audio level variations, then passes
through audio amplifier Q4014-1 (NJM2902), audio
switch Q4030 (NJU4066B), a 20 dB attenuater consist-
ing of R4180 and R4211, and limiter amplifier Q4018-4
(NJM2902), to the electronic volume control Q4029
(M51132FP), where the maximum deviation is set. The
audio signal subsequently passes through the 3-section
active low pass filter consisting of Q4019-1/-2/-3
(NJM2902) and audio amplifier Q4019-4 to J4008’s
pin10, providing the repeater transmit audio.
A portion of the audio signal from the active high pass
filter section of Q4024 is de-emphasized by Q4020-1
(NJM2902), providing a flat audio response. The filtered
audio then passes through the active band pass filter Q4016
(NJM2902) and audio mute gate Q4036 (DTC323TK)
to audio power amplifier Q4043 (TDA2003H), provid-
ing up to 2 Watts of audio power to the 8Ω loudspeaker.
A portion of the audio signal from the audio amplifier
Q4014-3 passes through the 3-section active low pass filter Q4045-2/-3/-4 and the low pass filtering section of
Q4024 to separate the CTCSS tones from the received
audio signal.
Sub-Audible Signaling (Decoder)
A portion of the audio signal from the audio amplifier
Q4014-3 passes through the 3-section active low pass filter Q4045-2/-3/-4 and the low pass filtering section of
Q4024 to separate the CTCSS tones from the received
audio signal. The CTCSS tones are sent to the CTCSS
decoder section of Q4024. When a CTCSS tone is received,
the CTCSS information is delivered to pin 20 of the Main
CPU Q4012 from pin 4 and 8 of Q4024, which compares
the CTCSS tone with the programmed tone.
Another portion of the audio signal amplified by
Q4014-3 passes through the 3-section active low pass filter Q4046-2/-3/-4 to separate the DCS codes from the received audio signal. The low pass filtered signal passes
through the phase detector Q4046-1 to pin 23 of the Main
CPU Q4012. When a DCS code is received, the Main CPU
Q4012 compares the DCS code with the programmed code.
If the received CTCSS tone or DCS code matches the
programmed tone or code, pin 39 of the Main CPU Q4012
goes low, turning on the squelch switch Q4036
(DTC323TK) and passing the received audio signal to
the audio power amplifier Q4043.
Squelch Control
The squelch circuit consists of noise amplifier Q3015
(2SC4116) and noise detector D3015 (MA143) on the
RX Unit, and control circuitry within main microprocessor Q4012 on the CNTL Unit.
When no carrier is received, noise at the output of the
audio detector stage of Q3012 is amplified by Q3015
(2SC4116GR), and then rectified by D3015 (MA143)
to provide a DC control voltage for the squelch switch.
The resulting DC voltage is delivered to pin 6 of JP3001.
25
Circuit Description
The DC voltage from the RX Unit is delivered to the
A-D analog input port (pin 31) of the Main CPU Q4012
(HD64F3337YF16) on the CNTL Unit, which compares
the squelch threshold level to that which is memorized in
EEPROM Q4008 (NM93C86A) or set by the front panel
SQL control.
RX PLL and VCO Circuits
The receiver’s PLL circuitry consists of PLL subsystem
IC Q3001 (MB15A02PFV1) on the RX Unit, which contains a reference oscillator/divider, serial-to-parallel data
latch, programmable divider, phase comparator and a swallow counter. Stability is obtained by a regulated 5 VDC
supply via Q3021 (NJM78L05UA) and temperature com-
pensated 14.4 MHz crystal oscillator X3001 via thermistor
TH3001 and TH3002.
The RX VCO, consisting of FET Q3008 and varactor
diodes D3005, D3006, D3008, and D3009, oscillates between 376.65 MHz and 406.65 MHz according to the programmed receiving frequency. The RX VCO output passes through buffer amplifier Q3009 and first local amplifier Q3011 to the first mixer D3011, as described previously. A portion of the RX VCO output is applied to the prescaler/swallow counter section in the PLL IC, Q3001. There
the RX VCO signal is divided by 64 or 65, according to a
control signal from the Main CPU Q4012 on the CNTL
Unit, before being applied to the programmable divider
section of the PLL IC Q3001.
The data latch section of the PLL IC Q3001 also receives serial dividing data from the Main CPU Q4012,
which causes the pre-divided RX VCO signal to be further divided by 75,330 ~ 81,330 (or 60,264 ~ 65,064) in
the programmable divider section in the PLL IC Q3001,
depending upon the desired receive frequency, so as to
produce a 5 kHz (or 6.25 kHz) derivative of the current
RX VCO frequency. Meanwhile, the reference divider section of the PLL IC Q3001 divides the 14.4 MHz crystal
reference from the reference oscillator X3001 and Q3002
(2SC4116GR) by 2880 (or 2304) to produce the 5 kHz
(or 6.25 kHz) loop reference.
The 5 kHz or 6.25 kHz signal from the programmable
divider (derived from the RX VCO) and that derived from
the crystal are applied to the phase detector section of the
PLL IC Q3001, which produces a pulsed output with pulse
duration depending on the phase difference between the
input signals. This pulse train is then converted to DC,
low pass filtered, then fed back to the RX VCO varactor
diodes D3005, D3006, D3008, and D3009.
Changes in the DC voltage applied to the varactor diodes D3005, D3006, D3008, and D3009 affect the reactance in the tank circuit RX VCO Q3008, changing the
oscillating frequency according to the phase difference
between the signals derived from the RX VCO and the
crystal reference oscillator. The RX VCO is thus phaselocked to the reference frequency standard.
Transmit Signal Path
The speech audio from the CNTL Unit is applied to
the varactor diode D2008 (HVU350), which frequency
modulates the TX VCO from the unmodulated carrier at
the transmit frequency. The modulated transmit signal is
buffered by Q2008 (2SC5226), then passes through the
RF amplifier Q2010 (2SC3357) and RF diode switch
D2010 (RN739F) to the PA Unit.
The transmit signal is applied to the RF amplifier
Q1501 (2SC3357) and RF power module IC Q1502
(PF0342A), then finally amplified by power amplifier
Q1507 (2SC3102) up to 50 Watts. Harmonic and spuri-
ous radiation in the final output is suppressed by a low
pass filter consisting of coils L1508 ~ L1511, plus capacitors C1548, C1555, C1557, C1561, C1567, and C1566
on the PA Unit, before delivery to the TX antenna jack.
TX PLL and VCO Circuits
The Transmitter’s PLL circuitry consists of PLL subsystem IC Q2001 (MB15A02PFV1) on the RX Unit,
which contains a reference oscillator/divider, serial-toparallel data latch, programmable divider, phase comparator and a swallow counter. Stability is obtained by a regulated 5 VDC supply via Q2012 (NJM78L05UA) and
temperature compensated 14.4 MHz crystal oscillator
X2001 via thermistor TH2001, TH2002 and TH2003.
The TX VCO, consisting of FET Q2005 (2SK508)
and varactor diodes D2002,D2003,D2005 and D2006,
oscillates between 450 MHz and 480 MHz according to
the programmed transmit frequency. The theory of operation of the remainder of the PLL circuitry is similar to that
of the RX PLL circuit; however, dividing data from the
Main CPU Q4012 on the CNTL Unit is such that the VCO
frequency is the actual transmit frequency.
26
Circuit Description
APC (Automatic Power Control)
RF power output from the final amplifier Q1507 is
sampled by C1550/C1559 and is then rectified by D1503/
D1504 (both 1SS319). The resulting DC voltage is ap-
plied to the comparator Q1509 (TA75S01F), where the
voltage is compared with a reference voltage from the Main
CPU Q4012 on the CNTL Unit, to produce a control voltage for the Automatic Power Controller Q1503
(2SB1122S) and Q1504 (2SC4116GR), which regulates supply voltage to the RF power module IC Q1502,
so as to maintain stable high (or low) output power under
varying antenna loading conditions.
CONTROL (CNTL) Unit
The CNTL Unit consists of 8-bit CPU Q4012
(HD64F3337YF16), EEPROM Q4008 (NM93C86A),
RX and TX speech audio circuits, and various analog
switches for the CPU and repeater interconnections.
Microprocessor operational code is stored in Q4008,
while channel data and repeater configuration information is programmed from an external PC connected to the
front panel’s MIC jack via a VPL-1 programming cable.
The output from the Main CPU Q4012, contains serial
control data used for REPEATER/BASE mode control,
as well as TX and RX PLL data. Crystal X4001 oscillates
at 16 MHz, and provides stable clock timing for the Main
CPU. When the repeater is powered on, the voltage at pin
8 of Q4012 becomes stable, and the output of voltage detector IC Q4005 (RH5VL45AA), which is tied to Q4012
(pin 1-RST) becomes high, resetting the Main CPU.
Base Operation (Tx, Line-Input Audio)
Line input from J4009 (pins 3 and 4) is impedance
matched by transformer T4001, then passes through the
audio amplifier Q4018-2 (NJM2902) and audio switch
Q4030 (NJU4066B) to the pre-emphasis network at
Q4018-1, where the signal is processed in the same man-
ner as previously described. The line level can be attenuated by switch S4002, and line sensitivity can be adjusted
to –10 dBm by potentiometer VR4003 to compensate for
audio line level variations.
Base Operation (Tx, Mic-Input Audio)
Microphone input is delivered past the MIC MUTE
switch Q4026 (DTC323TK), then passes through the audio amplifier and active high pass filter at Q4021-2/-3/-4
(NJM2902) to the pre-emphasis network at Q4018-1,
where the signal is processed in the same manner as previously described.
27
Alignment
The VXR-7000 is carefully aligned at the factory for
the specified performance across the entire operating frequency range. Realignment should therefore not be necessary except in the event of a component failure. All component replacement and service should be performed only
by an authorized Vertex Standard representative, or the
warranty policy may be void.
The following procedures cover the sometimes critical
and tedious adjustments that are not normally required once
the repeater has left the factory. However, if damage occurs and some parts subsequently are placed, realignment
may be required. If a sudden problem occurs during normal operation, it is likely due to component failure; realignment should not be done until after the faulty component has been replaced.
We recommend that servicing be performed only by
authorized Vertex Standard service technicians who are
experienced with the circuitry and fully equipped for repair and alignment. Therefore, if a fault is suspected, contact the dealer from whom the repeater was purchased for
instructions regarding repair. Authorized Vertex Standard
service technicians realign all circuits and make complete
performance checks to ensure compliance with factory
specifications after replacing any faulty components.
Those who do undertake any of the following alignments are cautioned to proceed at their own risk. Problems caused by unauthorized attempts at realignment are
not covered by the warranty policy. Also, Vertex Standard reserves the right to change circuits and alignment
procedures in the interest of improved performance, without notifying owners.
Under no circumstances should any alignment be attempted unless the normal function and operation of the
repeater are clearly understood, the cause of the malfunction has been clearly pinpointed and any faulty components replaced, and realignment determined to be absolutely necessary.
The following test equipment (and thorough familiarity with its correct use) is necessary for complete realignment. Correction of problems caused by misalignment resulting from use of improper test equipment is not covered under the warranty policy. While most steps do not
require all of the equipment listed, the interactions of some
adjustments may require that more complex adjustments
be performed afterwards.
Required Test Equipment
RF Signal Generator with calibrated output level at
1,000 MHz
Deviation Meter (linear detector)
In-line Wattmeter with 5% accuracy at 1,000 MHz
50 Ω RF Dummy Load with power rating 100W at
1,000MHz
4 Ω AF Dummy Load
Frequency Counter with 0.2ppm accuracy at
1,000MHz
AF Signal Generator
AC Voltmeter
DC Voltmeter: High input impedance
VHF Sampling Coupler
SINAD Meter
IBM PC/compatible Computer with MS-DOS or lat-
er operating system
Yaesu VPL-1 Connection Cable & CE27 Channel/
Alignment Diskette
Alignment Preparation & Precautions
A 50 Ω RF Dummy Load and in-line wattmeter must
be connected to the TX antenna jack in all procedures that
call for transmission, except where specified otherwise.
Correct alignment is not possible with an antenna.
After completing one step, read the following step to
determine whether the same test equipment will be required. If not, remove the test equipment (except dummy
load and wattmeter, in connected) before proceeding.
Correct alignment requires that the ambient temperature be the same as that of the repeater and test equipment,
and that this temperature be held constant between 68° ~
86 °F (20° ~ 30 °C). When the repeater is brought into the
shop from hot or cold air, it should be allowed time to
come to room temperature before alignment.
Whenever possible, alignments should be made with
oscillator shields and circuit boards firmly affixed in place.
Also, the test equipment must be thoroughly warmed up
before beginning.
Note: Signal levels in dB referred to in the alignment procedure are based on 0dBµ = 0.5µV. (closed circuit)
Do not attempt to perform only a single step unless it
is clearly isolated electrically from all other steps. Have
all test equipment ready before beginning, and follow all
of the steps in a section in the order presented.
28
Alignment
Set up the test equipment as shown below, and apply
AC power to the repeater.
The repeater must be programmed for use in the intended system before alignment is attempted. The frequency and other parameters are loaded from the file during
the alignment process.
In order to facilitate alignment over the complete
switching range of the equipment it is recommended that
the channel data first be uploaded and then stored to disk.
Channels at the upper, lower and middle band edges should
then be downloaded. The original data can be replaced at
the end of the alignment process.
Channel
Low band edge 450.000 MHz 400.000 MHz
Center 465.000 MHz 415.000 MHz
High band edge 480.000 MHz 430.000 MHz
Frequency
Ver . D Ve r. A
Transmitter
Press the BASE/REPEATER switch on the front panel
of the repeater so as to set it to the “BASE” mode if the
REPEATER LED is on. You should see the REPEATER LED turn off, indicating that the repeater is now in
the “BASE” mode.
PLL VCV (Varactor Control Voltage) Check
Connect the DC voltmeter between the VCV check
point (on the TX Unit) and chassis ground.
Select the Low band edge channel, then key the re-
peater. Confirm that the DC voltmeter reading is 0.6
~ 1.5 VDC (TYP D) or 1.5 ± 0.3 VDC (TYP A).
Select the High band edge channel, then key the re-
peater. Confirm that the DC voltmeter reading is 3.8
~ 4.5 VDC (TYP D) or 3.6 ± 0.4 VDC (TYP A).
PLL Reference Frequency Adjustment
Select the Center channel, then key the repeater.
Adjust TC2001 (on the TX unit), if necessary, so
that the frequency counter reading is within ±100Hz
of the programmed Center channel frequency.
Transmitter parameters (excluding PLL)
The following transmitter parameters can be adjust-
ed from the computer by utilizing the CE27 Channel/Alignment Diskette. Refer to the onboard help of
the CE27 Channel/Alignment Diskette for details.
Alignment Setup
TX Parameters Data
TX Power Level (High) 0 (00h) ~ 255 (FFh)
TX Power Level (Low) 0 (00h) ~ 255 (FFh)
Maximum Deviation 0 (00h) ~ 255 (FFh)
CTCSS Deviation 0 (00h) ~ 255 (FFh)
DCS Deviation 0 (00h) ~ 255 (FFh)
VCV Check Point
TC2001
TX Unit Alignment Points
29
Alignment
Receiver
PLL VCV (Varactor Control Voltage) Check
Connect the DC voltmeter between the VCV check
point (on the RX Unit) and chassis ground.
Select the Low band edge channel, and confirm that
the DC voltmeter reading is 1.6 ± 0.3 VDC (TYP D)
or 1.3 ± 0.3 VDC (TYP A).
Select the High band edge channel, and confirm that
the DC voltmeter reading is 4.5 ± 0.5 VDC (TYP D)
or 4.3 ± 0.5 VDC (TYP A).
PLL Reference Frequency Adjustment
Connect the Frequency counter to J3001 on the RX
Unit.
Select the Center channel, adjust TC3001 (on the
RX Unit), if necessary, so that the frequency counter
reading is within ±100 Hz of the programmed Center
channel frequency.
Receiver parameters (excluding PLL)
The following receiver parameters can be adjusted
from the computer by utilizing the CE27 Channel/
Alignment Diskette. Refer to the onboard help of the
CE27 Channel/Alignment Diskette for details.
RX Parameters Data
Squelch Threshold Level 0 (00h) ~ 255 (FFh)
Squelch W/N Level 0 (00h) ~ 255 (FFh)
RSSI Threshold Level 0 (00h) ~ 255 (FFh)
RX Tune Level 0 (00h) ~ 255 (FFh)
J3001
TC3001
VCV Check Point
RX Unit Alignment Points
30
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