Yaesu vxr 7000v schematic

Desktop Repeater

VXR-7000 (VHF)

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 ................................................. 14

Exploded View & Miscellaneous Parts .... 15

Block Diagram ............................................... 17

Interconnection Diagram............................. 20

Circuit Description ...................................... 21

Alignment ....................................................... 23

Board Unit (Schematics, Layouts & Parts)

PA Unit .................................................................... 27

TX Unit ..................................................................... 35

RX Unit ....................................................................43

CNTL Unit ............................................................... 55

LPF Unit ................................................................... 73

Display Unit ............................................................75

Key Unit ................................................................... 79

Filter Unit ................................................................ 87

VR Unit .................................................................... 95

SQL Unit .................................................................. 97

PS Unit ..................................................................... 99

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 momen- tarily, 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.

ANI Display

The ANI LCD (Liquid Crystal Display) indicates the pre-programmed ANI message according to the ANI code received.

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

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.

(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 con- trol.

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.

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 V 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.

p-p audio at this pin. The output impedance

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 In- dicator) 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

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 se-

lecting 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

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.

(D0)

1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0

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 Ω 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 page 8. 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

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.

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

Switching Regulator Unit

Figure 2

Figure 1

Switching Regulator Unit

Figure 3

Figure 4

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!

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 press [E

NTER] again to accept the

selected tone, or press [E

RROW] key;

SC] key

to cancel.

DCS Decoders: Toggle DCS Decoder ON/OFF, sets DCS Code #

Press the [S OFF, or press the [E

TER] key to display the

“C

ODE SELECT” win-

PACE] bar to toggle the DCS Decoder ON or

N-

dow, from which you may select a DCS code using the [A press [E the [E

RROW] key;

NTER] again to accept the selected code, or press

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.”

NTER] key.

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 determined 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.).

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.

CE27 Main Screen (Scrolled Right)

Operating Manual Reprint

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 play the “M

LECT” window, from which

NTER] key to dis-

ULTI TONE SE-

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 [SPACE] bar to toggle between “Duplex” operation 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 press [E

NTER] again to accept the

selected tone, or press the [E

RROW] key;

SC]

key to cancel.

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

Press the [S “off,” or press the [E

TER] key to display the

“C

ODE SELECT” win-

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

N-

dow, from which you may select a DCS code using the [A press [E the [E

RROW] key;

NTER] again to accept the selected code, or press

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.

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.

Operating Manual Reprint

Duplexer Installation

Important Note

Be certain to observe the specifications for Frequency Separation and Maximum Transmitter Power of the duplexer connected to the VXR-7000. The Frequency Separation should be 5 MHz (min.) to 10 MHz (max.), and the Maximum TX Power Rating should be at least 40 Watts.

If the VXR-7000 TX output power or frequency specification is out of the range of the duplexer's capability, you may re-program the Tx/Rx frequency pair and/or reduce the TX output power of the VXR-7000, so as to allow temporary operation of the VXR-7000 until a duplexer of proper ratings can be obtained.

Please consult with your Authorized Vertex Dealer for assistance with procurement of a suitable duplexer.

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.

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. Mount the duplexer to the bottom side of the repeater, using the four screws supplied with the optional Antenna Cable CT-68 (Figure 3).

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 2 Figure 3

Bottom Side

Specifications

General

Frequency Range: 136 ~ 150 MHz (A) or 150 ~ 174 MHz (C) 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.

Exploded View & Miscellaneous Parts

Ref.

YAESU 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

S8001782 THERMAL CONDUCTOR(4pcs)

FILTER Unit

S8001794 SPACER(5pcs)

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

DescriptionVXSTD P/N S5000182 U10306007 U04408001 U04308001 U24306001 U24308001 U23308001 U20406007 U20308002 U20306001 U04306002 U02308002 U02206002 U00206002 U00305001 U30308001 U01330007 U04335007 U52408002 U51416007 U70004002 U71004002 U72004002 U20308001

SCREW JFS-4S-B1WM TRUSS HEAD SCREW M3×6B SEMS SCREW HSM4×8 SEMS SCREW HSM3×8 TAPTITE SCREW M3×6 TAPTITE SCREW M3×8 TAPTITE SCREW M3×8 BINDING HEAD SCREW M4×6B BINDING HEAD SCREW M3×8NI BINDING HEAD SCREW M3×6 SEMS SCREW HSM3×6NI SEMS SCREW SM3×8NI SEMS SCREW SM2.6×6NI PAN HEAD SCREW M2.6X6NI PAN HEAD SCREW M3×5 FLAT HEAD SCREW M3×8 SEMS SCREW HM3×30B SEMS SCREW HSM3×35B HEX HEAD BOLT M4×8NI HEXA SOCKET BOLT M4×16B PLAIN WASHER FW4NI SPRING LOCK WASHER SW4NI TOOTHED LOCK WASHER OW4NI BINDING HEAD SCREW M3×8

(

Lot. 17-

(

Lot. 3-

)

Non-designated parts are available only as part of a designated assembly.

P1091072 CONNECTOR

Qty.Ref.

2 34 18

6 12

)

RA018270A (Lot. 1~) RA018270B (Lot. 26~) FRONT PANEL ASS’Y

RA0180600 KNOB (POW)

RA0180500 VOLUME KNOB

N4090143 PUSH SWITCH

RA0181500 PANEL FRAME

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

P9090014

M2090032 FAN

RA0180000 (Lot. 1~) RA018000A (Lot. 19~) CHASSIS

P1090654 CONNECTOR

RA0181400 BOTTOM CASE

CONNECTOR (2pcs)

PA Unit

Exploded View & Miscellaneous Parts

Note:

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 (MA143) and a varactor-tuned band pass filter consisting of coils L3002 and L3004, capacitors C3019, C3021, C3024, C3027, and C3028, and diodes D3004 and D3008 (both HVU350). Signals are then applied to the RF amplifier, Q3008 (2SC3357). The amplified RF signal is applied through a varactor-tuned band pass filter consisting of coils L3009 and L3012, capacitors C3053, C3054, C3059, C3060, and C3065, and diodes D3012 and D3013 (both HVU350) to the first mixer D3014 (GN2011-Q) along with the first local signal from the PLL circuit.

The first local signal is generated between 114.6 MHz and

152.6 MHz by the RX VCO, which consists of FET Q3007 (2SK508) and varactor diodes D3005, D3006, D3009, and D3010 (HVU350) according to the programmed receiving fre- quency; the local signal then passes through buffer amplifier Q3009 (2SC5226) and first local amplifier Q3011 (2SC3357) to the first mixer D3014.

The 21.4 MHz first IF signal is applied to monolithic crys-

tal filters XF3001 and XF3002 (both 21M10B1: ±10 kHz B.W.) which strip away unwanted mixer products, and the IF signal is applied to the first IF amplifier Q3016 (2SC2620QB). 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 20.945 MHz crystal X3002, produces the 455 kHz second IF signal when mixed with the first IF signal within Q3021. 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 Q3021 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 R3067 and C3115, 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 (NJM2902M) to the active high pass filter section of Q4024 (FX-805) which rejects the sub-audible frequency 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 Q4014-2 (NJM2902M), audio switch Q4030 (NJU4066BM), a 20 dB attenuator consisting of R4180 and R4211, and limiter amplifier Q4018-2 (NJM2902M), to the electronic volume control Q4029 (M51132FP), where the maximum deviation is set. The audio signal subsequently passes through the a 3-section active low pass filter consisting of Q4019-1/-2/-3 (NJM2902M) and

audio amplifier Q4019-4 to J4008’s pin 10, 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 (NJM2902M), providing a flat audio response. The filtered audio then passes through the active band pass filter Q4016 (NJM2902M) and audio mute gate Q4038 (DTC323TK) to audio power amplifier Q4043 (TDA2003H), providing up to 2 Watts of audio power

to the 8 Ω loudspeaker.

Sub-Audible Signaling (Decoder)

A portion of the audio signal from the audio amplifier Q4014-1 passes through the active low pass filter at Q4014-2 and the low pass filtering section of Q4024 to separate the subaudible tones from the received audio signal. The sub-audible tones are sent to the CTCSS/DCS decoder section of Q4024. When a CTCSS tone or DCS code is received, the CTCSS or DCS information is delivered to pin 20 of the Main CPU Q4012 from pin 4 of Q4024, which compares the CTCSS tone or DCS code with the programmed tone or code data. 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 Q3014

(2SC4116) and noise detector D3018 (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 Q3014 (2SC4116GR), and then rectified by D3018 (MA143) to provide a DC control voltage for the squelch switch. The resulting DC voltage is delivered to pin 6 of JP3001.

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 (TA78L05) and the temperature-compensated temperature compensated 14.4 MHz crystal oscillator X3001 via thermistor TH3001 and TH3002.

The RX VCO, consisting of FET Q3007 and varactor diodes D3005, D3006, D3009, and D3010, oscillates between

114.6 MHz and 152.6 MHz according to the programmed re-

Circuit Description

ceiving frequency. The RX VCO output passes through buffer amplifier Q3009 and first local amplifier Q3011 to the first mixer D3014, 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 22,920 ~ 30,520 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, D3009, and D3010.

Changes in the DC voltage applied to the varactor diodes D3005, D3006, D3009, and D3010 affect the reactance in the tank circuit RX VCO Q3007, 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 TX VCO, consisting of FET Q2005 (2SK508) and var- actor diodes D2004 and D2005, oscillates between 136 MHz and 174 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.

The speech audio from the CNTL Unit is applied to varactor diode D2005 (HVU350), which frequency modulates the TX VCO up to ±5 kHz (wide band) or ±2.5 kHz (narrow band) 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 D2008 (RN739F) to the PA Unit.

The transmit signal is applied to the RF amplifier Q1501 (2SC3357) and RF power module IC Q1502 (PF0310A), then

finally amplified by power amplifier Q1507 (2SC5125) up to 50 Watts. Harmonic and spurious radiation in the final output is suppressed by a low pass filter consisting of coils L1511 ~ L1515, plus capacitors C1546, C1547, C1554, C1556, C1560, and C1566 on the PA Unit, before delivery to the TX antenna jack.

APC (Automatic Power Control)

RF power output from the final amplifier Q1507 is sampled

by C1548/C1558 and is then rectified by D1503/D1504 (both 1SS319). The resulting DC voltage is applied 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 (NJM2902M) and audio switch Q4030 (NJU4066BM) to the pre-emphasis network at Q4018-1, where the signal is processed in the same manner as previously described. The line level can be attenuated by switch S4002, and line sensitivity can be adjusted to –10 dBm ~ +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 low pass filter at Q4021 (NJM2902M) to the pre- emphasis network at Q4018-1, where the signal is processed in the same manner as previously described.

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.

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.

Required Test Equipment

 RF Signal Generator with calibrated output level at 200

MHz

 Deviation Meter (linear detector)  In-line Wattmeter with 5% accuracy at 200 MHz  50 Ω RF Dummy Load with power rating 100W at

200MHz

 4 Ω AF Dummy Load  Frequency Counter with 0.2 ppm accuracy at 200MHz  AF Signal Generator  AC Voltmeter  DC Voltmeter: High input impedance  VHF Sampling Coupler  SINAD Meter  IBM PC/compatible Computer with MS-DOS or later

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° F ~ 86° F (20° C ~ 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 0 dBµ = 0.5 µV (closed cir-

cuit).

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 Frequency (MHz)

TYP C TYP A

Low band edge 150.000 136.000 Mid 1 160.000 140.000 Center 162.000 143.000 Mid 2 170.000 145.000 High band edge 174.000 150.000

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 1.7 V ~ 2.4 V (TYP C) or 1.6 V ~ 2.2 V (TYP A).

 Select the High band edge channel, then key the re-

peater. Confirm that the DC voltmeter reading is 3.9 V ~ 5.3 V (TYP C) or 3.0 V ~ 4.0 V (TYP A).

PLL Reference Frequency Adjustment

 Connect the Frequency counter to J2001 on the TX

Unit.

 Select the Center channel, then key the repeater.  Adjust TC2001 (on the TX unit), if necessary, so that

the frequency counter reading is within ±100 Hz of the programmed Center channel frequency.

Alignment Setup

Transmitter parameters (excluding PLL)

 The following transmitter 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.

TX Parameters Data

TX Power Level (High) 0 (00h) ~ 255 (FFh) TX Power Level (Mid 1) 0 (00h) ~ 255 (FFh) TX Power Level (Mid 2) 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)

J2001

TX Unit Alignment Points

Alignment