Vertex VXR-7000 Service manual

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Desktop Repeater

VXR-7000 (UHF)

Service Manual

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.

Operating Manual Reprint............................ 2

CE27 Programming Software Instruction ...........................

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

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 in- put, and provides a standby control line to activate the transmitter when using the “BASE” mode of opera- tion. 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 micro- phone 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 “LO- CAL” mode is selected, the LED above it is off, and

the repeater operates according to the control data pro- grammed into the repeater. While in the “REMOTE” mode, the LED glows green, and the repeater oper- ates 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 sig- nal 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 con- dition, 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, con- tact 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 chan- nel.

Channel Indicator

This seven-segment LED indicates the operating chan- nel number.

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 out- put for an external speaker. The audio output imped- ance at this jack is 4 Ω ~ 16 Ω, and level varies ac- cording to the setting of the front panel’s VOL con- trol.

TX Antenna Jack

This N-type coaxial jack provides the transmitting out- put signal for connection to the transmitting antenna or TX jack on the duplexer, if used. The output im- pedance 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 be- tween the microprocessor in the VXR-7000 and pe- ripheral 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 operat- ing the repeater from a battery or other DC source. When operating from AC mains, a small trickle cur- rent 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 op- eration.

Operating Manual Reprint

ACC Connector Port

The VXR-7000 repeater is provided with a 25-pin DB- 25F female connector for interconnections to accesso- ries. Use a DB-25M 25-pin male connector to connect accessories to the repeater. The pins on the accessory con- nector 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 in- jected 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). Inject- ing 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 imped- ance is approx. 600 Ω, and is extracted before the de- emphasis 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 sig- nal currently being received (Receiver Signal Strength Indicator) is provided on this pin. This low imped- ance output is generated by the receiver IF sub-sys- tem and buffered by an internal op-amp. Typical volt- ages are graphed as follows:

Pin 9: COAX. SW [Logic Output (Active Low)]

This output is intended for controlling an external co- axial switching relay. It is an open collector output which can sink approx. 10 mA when active. This sig- nal 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

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 inter- nal 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 sig- nals, with the data being extracted after the de-em- phasis 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 af- ter 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 sig- nal is injected before transmitter pre-emphasis and lim- iting 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 sig- nal is injected after transmitter splatter filter stage.

Operating Manual Reprint

LINE Interface Port

The VXR-7000 is provided with an 8-pin modular jack for line interfacing applications. A Western Electric® modu- 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 connec- tions 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) sig- naling. The opto-isolator comes on when a signal ex- ceeding 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) sig- naling. 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.

( ), ( )]

Installation

Antenna Considerations

Repeater operation without a duplexer requires that two antennas be installed, one for receiving and one for trans- mitting, so that the receiving antenna does not absorb en- ergy from the transmitting antenna. There are a number of ways to do this, depending on the TX/RX frequency sepa- ration, and on the locations available for antenna mount- ing. 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 impor- tance that the antenna(s) be mounted as high and in the clear as possible, preferably within line-of-sight to all re- peater 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 trans- mit antennas are used, high-Q narrow-band types may serve to minimize interaction. However, when a single an- tenna is used with a duplexer, it should be a low-Q wide- band 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 connec- tions (and label) if necessary, as shown next page.

Changing the AC input voltage wiring also requires chang- ing 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

Operating Manual Reprint

DC Power Supply Backup

For uninterrupted operation during power failures, a 12 volt rechargeable type battery (55-Ah or more recom- mended) 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 auto- matic 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 dam- age the repeater and battery.

While operating from a battery or DC supply, the repeater requires approximately 7 amperes at 12 Volts during trans- mit.

Equipment Location

While the operating temperature range of the repeater is quite broad, the best location is one in which the air tem- perature 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 ex- tremes in temperature or humidity that may shorten the useful life of the equipment. Try to locate the re- peater in an environment that is also comfortable for service personnel, if possible.

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 Switch- ing Regulator Unit, and remove it (the Switching Regu- lator 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 re- place with a slow-blow type fuse.

FILTER Unit

Figure 2

Switching Regulator Unit

Figure 1

Operating Manual Reprint

Switching Regulator Unit

Figure 4

Figure 3

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 (usu- ally “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 [ENTER]” to start the program. The in- 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.

Important Note!

 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 distribu- tion 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 environ- ment data from the VXR-7000, using the [F5] (ReadRom) command. Use this data profile to create the programming data for this repeater.

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 chan- nel. 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 fre- quency directly, and press the [E

CTCSS Decoders: Toggle CTCSS Decoder ON/OFF, sets CTCSS Frequency

Press the [SPACE] bar to toggle the CTCSS Decoder “on” or “off,” or press the [ENTER] 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 [SPACE] 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 [ESC] key to cancel.

NTER] key.

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 [SPACE] 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 thresh- old level directly, and press the [ENTER] key. Available values are 0 (min.) ~ 255 (max.).

CE27 Main Screen (Scrolled Right)

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 transi- tion 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 [SPACE] bar to toggle Multi Tone Operation be- tween selections “yes” and “no.” Press the [E

NTER] key to

display the “MULTI 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

RROW] key, then press the [ENTER] key to

open the “TONE SELECT” or “CODE SELECT” window. Now select the desired CTCSS tone or DCS code using the [AR-

ROW] key, then press the [ENTER] key again to accept the

selected tone or code, or press the [ESC] 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

ULTI TONE SELECT” window (when

the “MULTI TONE SELECT” window data is not pro- grammed), press the [SPACE] 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 [SPACE] 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 fre- quency directly, and press the [ENTER] key.

CTCSS Encoders: Toggle CTCSS Encoder ON/OFF, sets CTCSS Frequency

Press the [S

PACE] bar to toggle the CTCSS Encoder “on”

or “off,” or press the [ENTER] 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 [ESC] key to cancel.

DCS Encoders: Toggle DCS Encoder ON/OFF, sets DCS Code #

Press the [S

PACE] bar to toggle the DCS Encoder “on” or

“off,” or press the [ENTER] key to display the “CODE SE-

LECT” window,

from which you may select a DCS code using the [A

RROW] key;

press [ENTER] 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 [SPACE] 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

PACE] bar to toggle the Lock Out Feature be-

tween “BCLO,” “BTLO,” or “off,” then press the [EN-

TER] key to accept the setting. “BCLO” inhibits transmit-

ting while there is carrier present. “BTLO” inhibits trans- mitting while there is carrier present unless there also is a valid tone present.

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

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 [SPACE] bar to toggle the Repeater TOT selects “yes” or “no.” The TOT time is determined via dealer programming.

PACE] bar to select “Hi” or “Lo.”

RptTOT Beep: Enable/disable the TOT beep Transmis-

sion

Press the [SPACE] 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 selects “yes” or “no.” When this parameter is set to “yes,” the repeater will re- main 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 in- hibit few second before the repeater is unkeyed. The inhibit time is determined via dealer programming.

PACE] bar to toggle the Repeater Hang-on Timer

Operating Manual Reprint

Duplexer Installation

Important Notes!

Please refer to the operating manual for your Du- plexer for details regarding maximum power in- put, TX/RX connector locations, etc) before in- stalling the Antenna Duplexer.

Be certain to observe and comply with the speci- fications for frequency separation and maximum transmitter power for the duplexer connected to the VXR-7000, particularly when using the VXD- 40xx 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 Du- plexer, using the following procedure:

1. Connect the VXR-7000’s TX antenna port to a watt- meter and dummy load (the duplexer must not be con- nected 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. Ob- serve the power output as indicated on the watmeter.

4. Press the  (UP: increment) or  (DOWN: decre- ment) button (to the right of the channel display) re- peatedly 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, re- lease 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 chan- nels (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 dis- connect 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.

Operating Manual Reprint

Installations

1. Remove the 14 screws affixing the top and bottom cov- ers of repeater, and remove the covers (Figure 1).

2. Turn the repeater upside down.

3. Referring to Figure 2, remove the upper screw in ei- ther 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 bot- tom 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 sup- plied 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 “up- per shift” type (TXf > RXf), connect the coaxial cable from the RX Unit to the LOW PASS jack of the du- plexer 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

Figure 4

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.

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

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

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

Note:

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

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)

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

Rubber Spacer

RA0766400

Heat Sink Plate

RA0766900

Screws M2.6X5

U32450001

Block Diagram

Interconnection Diagram

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 consist- ing 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 am- plifier, Q3005 (2SC3357). The amplified RF signal is applied through a varactor-tuned band pass filter consist- ing 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 pass- es 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 sec- ond IF signal when mixed with the first IF signal within Q3012. The second IF signal passes through ceramic fil- ter 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, consist- ing 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 sensitiv- ity 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.

Sub-Audible Signaling (Decoder)

A portion of the audio signal from the audio amplifier Q4014-3 passes through the 3-section active low pass fil- ter 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 fil- ter Q4046-2/-3/-4 to separate the DCS codes from the re- ceived 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 microproces- sor 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.

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 con- tains a reference oscillator/divider, serial-to-parallel data latch, programmable divider, phase comparator and a swal- low 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 be- tween 376.65 MHz and 406.65 MHz according to the pro- grammed receiving frequency. The RX VCO output pass- es through buffer amplifier Q3009 and first local amplifi- er Q3011 to the first mixer D3011, as described previous- ly. A portion of the RX VCO output is applied to the pres- caler/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 re- ceives serial dividing data from the Main CPU Q4012, which causes the pre-divided RX VCO signal to be fur- ther 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 sec- tion 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 di- odes D3005, D3006, D3008, and D3009 affect the reac- tance 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 phase- locked 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 capac- itors 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 sub- system IC Q2001 (MB15A02PFV1) on the RX Unit, which contains a reference oscillator/divider, serial-to- parallel data latch, programmable divider, phase compar- ator and a swallow counter. Stability is obtained by a reg- ulated 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 opera- tion 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.

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 volt- age for the Automatic Power Controller Q1503 (2SB1122S) and Q1504 (2SC4116GR), which regu- lates 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 informa- tion 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 de- tector 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 attenu- ated 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 au- dio 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 pre- viously described.

Alignment

The VXR-7000 is carefully aligned at the factory for the specified performance across the entire operating fre- quency range. Realignment should therefore not be nec- essary except in the event of a component failure. All com- ponent 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 oc- curs and some parts subsequently are placed, realignment may be required. If a sudden problem occurs during nor- mal operation, it is likely due to component failure; re- alignment should not be done until after the faulty com- ponent 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 re- pair and alignment. Therefore, if a fault is suspected, con- tact 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 align- ments are cautioned to proceed at their own risk. Prob- lems caused by unauthorized attempts at realignment are not covered by the warranty policy. Also, Vertex Stan- dard reserves the right to change circuits and alignment procedures in the interest of improved performance, with- out notifying owners.

Under no circumstances should any alignment be at- tempted unless the normal function and operation of the repeater are clearly understood, the cause of the malfunc- tion has been clearly pinpointed and any faulty compo- nents replaced, and realignment determined to be abso- lutely necessary.

The following test equipment (and thorough familiari- ty with its correct use) is necessary for complete realign- ment. Correction of problems caused by misalignment re- sulting from use of improper test equipment is not cov- ered 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 re- quired. If not, remove the test equipment (except dummy load and wattmeter, in connected) before proceeding.

Correct alignment requires that the ambient tempera- ture 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 pro- cedure 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.

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 in- tended system before alignment is attempted. The frequen- cy 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 REPEAT- ER 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 Chan- nel/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

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

+ 104 hidden pages

Vertex VXR-7000 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Introduction

Contents

Operating Manual Reprint

Controls & Connectors

ACC Connector Port

LINE Interface Port

Installation

Changing Switching Regulator unit AC Mains Jumper Wiring

CE-27 Programming Software Instruction

Duplexer Installation

Specifications

Exploded View & Miscellaneous Parts (Lot. 1-70)

Exploded View & Miscellaneous Parts (Lot.71-)

Block Diagram

Interconnection Diagram

Circuit Description

Receive Signal Path

Sub-Audible Signaling (Decoder)

RX PLL and VCO Circuits

Transmit Signal Path

TX PLL and VCO Circuits

APC (Automatic Power Control)

CONTROL (CNTL) Unit

Base Operation (Tx, Line-Input Audio)

Alignment

Required Test Equipment

Alignment Preparation & Precautions

Transmitter

Receiver