Yaesu vxr 9000u schematic

Rack Mount Repeater

VXR-9000

(

UHF

)

Service Manual

2003 VERTEX STANDARD CO., LTD. EC044U90A

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 the technical information necessary for servicing the VXR-9000 Rack Mount Repeater.

Servicing this equipment requires expertise in handing 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 board in this transceiver. Each side of the board is referred to by the type of the majority of components installed on that side (“Side A” or “Side B”). In most cases one side has only chip components (surface-mount devices), and the other has either a mixture of both chip and leaded components (trimmers, coils, electrolytic capacitors, ICs, etc.), or leaded components only.

As described in the pages to follow, the advanced microprocessor design of the VXR-9000 allows a complete alignment of this transceiver to be performed without opening the case of the radio; all adjustments can be performed from the personal computer, using with the Vertex Standard VPL-1 Programming Cable and CE60 Software.

While we believe the information in this manual to be correct, Vertex Standard assumes no liability for damage that may occur as a result of typographical or other errors that may be present. Your cooperation in pointing out any inconsistencies in the technical information would be appreciated.

Contents

Specifications ........................................................... A-1

DSUB 15-pin Accessory Connector ...................... B-1

Exploded View & Miscellaneous Parts ............... C-1

Block Diagram ......................................................... D-1

Connection Diagram ............................................... E-1

Circuit Description ...................................................F-1

Alignment ................................................................ G-1

Board Units (Schematics, Layouts & Parts)

MAIN Unit .......................................................... H-1

CNTL Unit ............................................................ I-1

PANEL Unit .......................................................... J-1

PA Unit ................................................................. K-1

REG Unit .............................................................. L-1

SUB Unit ............................................................... M1

Specifications

General

Frequency Range: A : 400 - 430 MHz, D : 450 - 490 MHz, F : 480 - 512 MHz

Number of channel:32 Channel Spacing: 5 kHz/6.25 kHz Operating Voltage: 13.6 V DC ±10 % Current Drain: 12 A Maximum Duty Cycle: Receive : 100 %

Transmit : 100 % (@25 W output)

Frequency Stability: 1.5 ppm

1.0 ppm (30min after wake up)

Operating Temperature Range: –22 °F to +140 °F (–30 °C to +60 °C) Dimensions (W x H x D): 19 x 3-1/2 x 13-1/2 inch (483 x 88 x 343 mm) Weight (Approx.): 21.4 lbs. (9.7 kg)

Receiver

Antenna Impedance: 50 ohm

Antenna Connector: Type-BNC Receiver Type: Double-Conversion Superheterodyne Sensitivity: 0.35 µV (12dB SINAD), 0.45 µV (20dB Noise Quieting) Selectivity: 83 dB (Wide), 75 dB (Narrow) Intermodulation: 82 dB (Wide), 78 dB (Narrow) Image Rejection: 90 dB Squelch Threshold: –5 dBµ Audio Output: 4 W @4 ohm Audio Distortion:< 3 % Hum and Noise: > 50 dB (Wide), > 45 dB (Narrow) Audio Frequency Response: De-emphasis : 6 dB/oct (From 300 Hz to 3 kHz) Conducted Spurious: < –80 dBm

Transmitter

RF Output Power: 50/25/10 W (High/Mid/Low)

Antenna Impedance: 50 ohm Antenna Connector: Type-N Modulation Type: 16K0F3E/11K0F3E System Deviation: ±5.0 kHz (Wide), ±2.5 kHz (Narrow) Hum and Noise: >46 dB (Wide), >43 dB (Narrow) Microphone Sensitivity:5 mV Audio Frequency Response: Pre-emphasis : 6dB/oct (From 300 Hz to 3 kHz) Spurious Emission: 70 dB below carrier Audio Distortion: 3.0 % @1 kHz Microphone Impedance: 600 ohm

Specifications subject to change without notice or obligation.

A-1

DSUB 25-pin Accessory Connector

The VXR-9000 repeater is provided with a 25-pin DB-25F 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:

DB-25 PIN NUMBERING

Pin 1: GND

Chassis ground for all logic levels and power supply return.

Pin 2: +13.6 V

[

POWER SUPPLY This pin provides 13.6 Volts, 2.0 A, DC from the repeater supply. There is a internal 3 A fuse to prevent damage to the repeater.

]

Pin 3: TX AF IN

[

ANALOG TRANSMITTER INPUT] (VOICE BAND: 300 ~ 3,000 HZ

This pin is s audio input. Input impedance is 600 Ohms. This audio is injected before the splatter filter stage, so excess signal input levels are clipped.

Pin 5: TX ATT

This output is intended for controlling an external coaxial switching relay. It is an open drain output which can sink approx. 1.5 A when active. The delay time which is between the repeater cause to transmit mode and this port switches to ground can be programmed by your VERTEX STANDARD dealer.

Pin 6: DISC OUT

[

ANALOG OUTPUT] (WIDE-BAND: 0 ~ 3,000 HZ

Received signals with full system deviation produce 350 mVrms audio at this pin. The output impedance is 600 Ohm, 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: N.C.

No connection.

Pin 8: RSSI

[

ANALOG OUTPUT]

A DC voltage proportional to the strength of the signal currently being received (Receiver Signal Strength Indi- cator) 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:

(DC V)

2.5

g a

t l

2.0

o V t u

1.5

p t

1.0

O I S

0.5

)

S R

–60 –100 –110 –120 (dBm)–70 –80 –90

Input Signal Level

Use shielded cable to connect to this pin, and connect the shield to GND.

Pin 4: TONE IN

[

TRANSMITTER INPUT] (SUB-AUDIBLE BAND: 5 ~ 250 HZ

This pin is sub-audible tone produces 10% of full system deviation. The nominal input voltage is 77.5 mVrms. The input impedance is@600 Ohms, and has a flat response characteristic (repeater deviation is constant for a given signal level over the frequency range of 5 ~ 250 Hz). 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 9: COAX. SW

[

LOGIC OUTPUT (ACTIVE LOW

This output is intended for controlling an external coaxial switching relay. It is an open drain output which can sink approx. 1.5 A when active. This signal only switches if the repeater has been programmed for “SIMPLEX” mode. If programmed for “DUPLEX,” the signal remains open (high impedance) at all time.

)]

B-1

DSUB 25-pin Accessory Connector

Pin 10, 13, 15, 16, 17, 18, 19, 21: PROGRAMMABLE I/O “0” ~ ”7”

The VXR-9000 provides eight ports (PIO) that can be programmed for various input or output signals, or for control functions. Each port may be programmed as to its function, its status (input or output), and its logic (for output ports only). See Tables on the next page for detail regarding the input and output signals.

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.

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 “Remote” 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 14, 20: GND

Chassis ground for all logic levels and power supply return.

Pin 22: RXD LOW

[

ANALOG OUTPUT FOR DATA COMMUNICATIONS

(

300 ~ 3,000 Hz

This pin is an output for low speed receiving data signals (typically 1200 bps), with the data being extracted after the de-emphasis and low pass filter stages.

)

]

Pin 23: RXD HIGH

[

DIGITAL OUTPUT FOR DATA COMMUNICATIONS

(

Max.: 5 kHz

This pin is an output for high speed receiving data signals (typically 9600 bps), with the data being extracted immediately after the discriminator (prior to any de-emphasis).

)

]

Pin 24: TXD LOW

[

ANALOG INPUT FOR D ATA COMMUNICATIONS

(

300 ~ 3,000 Hz

This pin is intended to be used as a low speed data signal input to the repeater (typically 1200 bps). This digital data signal is injected before the transmitter pre-emphasis and limiting stages, so excess signal input levels are clipped.

)

]

Pin 25: TXD HIGH

[

DIGITA L INPUT FOR THE DATA COMMUNICATIONS

(

0 ~ 5 kHz

This pin is intended to be used as a high speed digital data signal input to the repeater (typically 9600 bps). This digital data signal is injected after the transmitter splatter filter stage.

)

]

B-2

DSUB 25-pin Accessory Connector

PROGRAMMABLE I/O PORT INPUT ITEMS

Item

Bin_CH_0

Bin_CH_1

Bin_CH_2

Bin_CH_3

Bin_CH_4

Channel_Down

Channel_Up

Compander_On

Compander_Off

Compander_Toggle

CTCSS/DCS

Two_Tone_Dec_On

Two_Tone_Dec_Off

Two_Tone_Dec_Toggle

CW_ID_On

CW_ID_Off

CW_ID_Toggle

CW_ID_Single

CW_Message_1

CW_Message_2

CW_Message_3

CW_Message_4

CW_Message_5

CW_Message_6

CW_Message_7

CW_Message_8

CW_Message_Bin_0

CW_Message_Bin_1

CW_Message_Bin_2

CW_Message_Bin_Trig

DC_Power_Save_On

DC_Power_Save_Off

DC_Power_Save_Toggle

Encryption_On

Encryption_Off

Encryption_Toggle

Encryption_Code

Local_PTT_On

Local_PTT_Off

Local_PTT_Toggle

Enc_On

Enc_Off

Enc_Toggle

Dec_On

Dec_Off

Dec_Toggle

Function

Recall the Memory Channel (Binary LSB) Recall the Memory Channel (Binary) Recall the Memory Channel (Binary) Recall the Memory Channel (Binary) Recall the Memory Channel (Binary MSB) Step to the next-lower Operating Channel Step to the next-higher Operating Channel Turn the Compander Circuit "On" Turn the Compander Circuit "Off" Turn the Compander Circuit "On" or "Off" (Toggle) Turn the CTCSS/DCS Encoder "On" Turn the CTCSS/DCS Encoder "Off" Turn the CTCSS/DCS Encoder "On" or "Off" (Toggle) Turn the CTCSS/DCS Decoder "On" Turn the CTCSS/DCS Decoder "Off" Turn the CTCSS/DCS Decoder "On" or "Off" (Toggle) Turn the 2-Tone Decoder "On" Turn the 2-Tone Decoder "Off" Turn the 2-Tone Decoder "On" or "Off" (Toggle) Turn the CW IDer "On" Turn the CW IDer "Off" Turn the CW IDer "On" or "Off" (Toggle) Transmit the CW ID Send the CW Message 1 Send the CW Message 2 Send the CW Message 3 Send the CW Message 4 Send the CW Message 5 Send the CW Message 6 Send the CW Message 7 Send the CW Message 8 CW Message Recall (Binary LSB) CW Message Recall (Binary) CW Message Recall (Binary MSB) Send the CW Message which is recalled from I/O port Turn the DC Power Save Feature "On" Turn the DC Power Save Feature "Off" Turn the DC Power Save Featuer "On" or "Off" (Toggle) Turn the Encryption Circuit "On" Turn the Encryption Circuit "Off" Turn the Encryption Circuit "On" or "Off" (Toggle) Select the Encryption Code Enable the Local PTT Switch Disable the Local PTT Switch Enable/Disable the Local PTT Switch (Toggle)

Item

Monitor_On Monitor_Off Monitor_Toggle Monitor_M

Multi_Tone_Main Multi_Tone_Sub Multi_Tone_Toggle

Panel_Indicator_On Panel_Indicator_Off Panel_Indicator_Toggle Repeat_On Repeat_Off Repeat_Toggle

Reset Scan_On Scan_Off Scan_Toggle Squelch_On Squelch_Off Squelch_Toggle Test_Tone_On Test_Tone_Off Test_Tone_Toggle Test_Tone_M

TOT_On TOT_Off TOT_Toggle Transmit_On Transmit_Off Transmit_Toggle TX_Power_Mid_On TX_Power_Mid_Off TX_Power_Mid_Toggle

TX_Power_Low_On TX_Power_Low_Off TX_Power_Low_Toggle

Function

Turn the Monitor Function "On" Turn the Monitor Function "Off" Turn the Monitor Function "On" or "Off" (Toggle) Turn the Monitor Function "On" when the I/O port is "High" Select the Tone Table to "Main" Select the Tone Table to "Sub" Switch the Tone Table between "Main" and "Sub" (Toggle) Turn the Front Panel's Illumination "On" Turn the Front Panel's Illumination Off Turn the Front Panel's Illumination "On" or "Off" (Toggle) Set theOperating Mode to "Repeat" mode Set theOperating Mode to "Base" mode Toggle theOperating Mode between the "Repeat" mode and "Base" mode Reset the Repeater Start Scanning Stop Scanning Toggle the Scanner between "Start" and "Stop" Turn the Squelch Circuit "On (Close)" Turn the Squelch Circuit "Off (Close)" Turn the Squelch Circuit "On" or "Off" (Toggle) Generate the Test Tone Signal Stop the generation of the Test Tone Toggle the Test Tone genetation "On" and "Off" Generate the Test Tone Signal when the I/O port is "High" Turn the Time-Out Timer featuer "On" Turn the Time-Out Timer featuer "Off" Turn the Time-Out Timer featuer "On" or "Off" Enable the transmission of the Repeater Disable the transmission of the Repeater Enable/Disable the transmission of the Repeater Set the transmitter power to the "Mid" level Return the transmitter power to "Original" power level Toggle the transmitter power between the "Mid" level and "Original" power level Set the transmitter power to the "Low" level Return the transmitter power to "Original" power level Toggle the transmitter power between the "Low" level and "Original" power level

Item

Remote_Enb

Busy

CTCSS_Correspond

DCS_Correspond

CTCSS/DCS_Correspond

RX_Unlock

TX_Unlock

PLL_Unlock

PROGRAMMABLE I/O PORT OUTPUT ITEMS

Function

Output the signal when the Operating mode is set to "Repeat" mode. Output the signal when the squelch is opened. Output the signal when the receiving CTCSS tone is matched. Output the signal when the receiving DCS code is matched. Output the signal when the receiving CTCSS tone or DCS code is matched. Output the signal when the RX PLL Circuit is Unlocked. Output the signal when the TX PLL Circuit is Unlocked. Output the signal when the TX or RX PLL Circuit is Unlocked.

Item

Power_Supply_Backup

Power_Supply_Voltage Transmit Fan_Alarm Fan_Status High_Temperature

TX_PD_Det Anser_Back

Function

Output the signal when the backup power source is used. Output the signal when the main power source is used. Output the signal when the repeater is transmitting. Output the signal when the Coolig Fan is disabled. Output the signal when the Coolig Fan is activated. Output the signal when the PA Unit is High Temperature. Output the signal when the TX power is abnormalily. Output the signal when the repeater status is changed from the Remote Control command.

B-3

DSUB 25-pin Accessory Connector

Note

B-4

Exploded View & Miscellaneous Parts

C-1

Exploded View & Miscellaneous Parts

Note

C-2

Block Diagam

MAIN Unit

D-1

Block Diagam

CNTL Unit, PANEL Unit, & PA Unit

D-2

Connection Diagam

E-1

Connection Diagam

Note

E-2

Circuit Description

RECEIVE SIGNAL PATH

Incoming RF from the RX antenna jack is delivered to the MAIN Unit and passes through the protection diode D1001 (1SS302) and a varactor-tuned band pass filter con- sisting of coils L1003 and L1004, capacitors C1015, C1018, C1021, C1032, and C1044, and diodes D1003 and D1004 (both HVU350). Signals are then applied to the RF amplifier, Q1009 (2SC3357). The amplified RF signal is applied through a varactor-tuned band pass filter consisting of coils L1010 and L1011, capacitors C1079, C1092, C1082, C1095 and C1075, and diodes D1007 and D1005 (both HVU350) to the first mixer Q1018 (SPM5001) along with the first local signal from the PLL circuit.

The first local signal is generated between 376.65 MHz and 416.65 MHz by the RX VCO, which consists of FET Q1048 (2SK508) and varactor diodes D1018 and D1019 (both 1SV282) or FET Q1049 (2SK508) and varactor diodes D1020 and D1021 (both 1SV282), according to the programmed receiving frequency; the local signal then passes through buffer amplifier Q1059 (2SC5226) and first local amplifier Q1019 (2SC3357) to the first mixer Q1018 (SPM5001).

The 73.35 MHz first IF signal is applied to monolithic crystal filters XF1001 and XF1002 which strip away unwanted mixer products, and the IF signal is applied to the first IF amplifiers Q1022 (2SC5226). The amplified first IF signal is then delivered to the FM IF subsystem IC Q1028 (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 X1002, produces the 455 kHz second IF signal when mixed with the first IF signal within Q1028 (TA31136FN). The second IF signal passes through ceramic filter CF1001 or CF1002 which strips away all but the desired signal, and then passes through the limiter amplifier within Q1028 (TA31136FN) to ceramic discrimi- nator CD1001, 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 R1199 and C1244, which rejects the 455 kHz IF component.

The audio signal from the MAIN Unit is delivered to the CNTL Unit and passes through the audio amplifier Q1020 (NJM2904V) to the active high pass filter section of Q3020 (FX805LG), which rejects the sub-audible frequency component. The filtered audio signal is delivered to electronic volume Q1056, which adjusts the audio sensitivity to compensate for audio level variations, then passes through audio amplifier Q1020 (NJM2904V), audio switch Q1040 (BU4066BCFV), attenuator consisting of R1233, and limiter amplifier Q1050 (NJM2904V), to the electronic vol-

ume control Q1056 (M51132FP), where the maximum deviation is set. The audio signal subsequently passes through the 3-section active low pass filter consisting of Q1017-1/-2/-3 (NJM2902V) and audio amplifier Q1001 (NJM2902V) to providing the repeater transmit audio.

A portion of the audio signal from the active high pass filter section of Q4024 (NJM2902V) is de-emphasized consisting of Q3036 (TA75S01F), R3198, and C3144, provid- ing a flat audio response. The filtered audio then passes through the active band pass filter Q3021 (NJM2902V) and audio mute gate Q3015 (DTC323TK) to audio power amplifier Q1057 (TDA2003), providing up to 2 Watts of audio power to the 8 Ohm loudspeaker.

SUB-AUDIBLE SIGNALING (DECODER

A portion of the audio signal from the audio amplifier Q1020 (NJM2904V) passes through the 3-section active low pass filter Q1025 (NJM2902V) and the low pass fil- tering section of Q3020 (FX805LG) to separate the CTCSS tones from the received audio signal. The CTCSS tones are sent to the CTCSS decoder section of Q3020 (FX805LG). When a CTCSS tone is received, the CTCSS information is delivered to pin 77 of the Main CPU Q3014 (HD64F2238) from pin 4 and 8 of Q3020 (FX805LG) which compares the CTCSS tone with the programmed tone.

Another portion of the audio signal passes through the 3section active low pass filter Q3044 (NJM2902V) to separate the DCS codes from the received audio signal. The low pass filtered signal passes through the phase detector Q3044 (NJM2902V) to pin 39 of the Main CPU Q3014 (HD64F2238). When a DCS code is received, the Main CPU Q3014 (HD64F2238) compares the DCS code with the programmed code.

If the received CTCSS tone or DCS code matches the programmed tone or code, pin 4 of the Main CPU Q3014 (HD64F2238) goes low, turning off the squelch switch Q3015 (DTC323TK) and passing the received audio sig- nal to the audio power amplifier Q1057 (TDA2003V).

)

SQUELCH CONTROL

The squelch circuit consists of noise amplifier Q1033 (2SC4116GR) and noise detector D1015 (MA143) on the MAIN Unit, and control circuitry within Main CPU Q3014 (HD64F2238) on the CNTL Unit.

When no carrier is received, noise at the output of the audio detector stage of Q1028 (TA31136FN) is amplified by Q1033 (2SC4116GR), and then rectified by D1015 (MA143) to provide a DC control voltage for the squelch switch. The resulting DC voltage is delivered to pin 23 of J1005.

The DC voltage from the MAIN Unit is delivered to the A-D analog input port (pin 51) of the Main CPU Q3014 (HD64F2238) on the CNTL Unit, which compares the

F-1

Circuit Description

squelch threshold level to that which is memorized in EEPROM Q3006 (BR24L32F) or set by the front panel SQL control.

RX PLL AND VCO CIRCUITS

The receiver’s PLL circuitry consists of PLL subsystem IC Q1052 (MB15A02PFV1) on the MAIN Unit, which con- tains 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 Q1062 (L78M05T) and temperature com- pensated 14.4 MHz crystal oscillator X1003.

The RX VCO made up two VCO circuit, one is Low-Band RX VCO, consisting of FET Q1048 (2SK508) and varactor diodes D1018 and D1019 (both 1SV282), and another one is High-Band RX VCO, consisting of FET Q1049 (2SK508) and varactor diodes D1020 and D1021 (both 1SV282), oscillates between 376.65 MHz and 416.65 MHz according to the programmed receiving frequency. The RX VCO output passes through buffer amplifier Q1059 (2SC5226) and first local amplifier Q1019 (2SC3357) to the first mixer Q1018 (SPM5001), as described previously. A portion of the RX VCO output is applied to the prescaler/swallow counter section in the PLL IC Q1052 (MB15A02PFV1). There the RX VCO signal is divided by 64 or 65, according to a control signal from the Main CPU Q3014 (HD64F2238) on the CNTL Unit, before being applied to the programmable divider section of the PLL IC Q1052 (MB15A02PFV1).

The data latch section of the PLL IC Q1052 (MB15A02PFV1) also receives serial dividing data from the Main CPU Q3014 (HD64F2238), which causes the pre- divided RX VCO signal to be further divided by 75,330 ~ 81,330 (or 60,264 ~ 65,064) in the programmable divider section in the PLL IC Q1052 (MB15A02PFV1), depend- ing 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 Q1052 (MB15A02PFV1) divides the 14.4 MHz crystal reference from the reference oscillator X1003 and Q1045 (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 Q1052 (MB15A02PFV1), 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 D1018/D1019 and D1020/D1021 (all 1SV282).

Changes in the DC voltage applied to the varactor diodes D1018/D1019 and D1020/D1021 (all 1SV282) affect the

reactance in the tank circuit RX VCO Q1048/1049 (both 2SK508), 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 D1010 (HVU350), which frequency modu- lates the TX VCO from the unmodulated carrier at the transmit frequency. The modulated transmit signal is buffered by Q1026 (2SC5226), then passes through the RF amplifier Q1030 (2SC3357) and RF diode switch D1016 (RN739F) to the PA Unit.

The transmit signal is applied to the RF amplifier Q5001 (2SC3357) and Q5008 (PD55008), then finally amplified by power amplifier Q5015 and Q5016 (both PD55025S) up to 50 Watts. Harmonic and spurious radiation in the final output is suppressed by a low pass filter consisting of coils L5007 ~ L5010, plus capacitors C5071, C5078, C5082, C5085, and C5088 on the PA Unit, before delivery to the TX antenna jack.

TX PLL AND VCO CIRCUITS

The Transmitter’s PLL circuitry consists of PLL subsystem IC Q1008 (MB15A02PFV1) on the MAIN 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 Q1062 (L78M05T) and temperature com- pensated 14.4 MHz crystal oscillator X1001.

The TX VCO, consisting of FET Q1021 (2SK508) and var- actor diodes D1008 and D1009 (both 1SV282), oscillates between 450 MHz and 490 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 Q3014 (HD64F2238) on the CNTL Unit is such that the VCO frequency is the actual transmit frequency.

APC (AUTOMATIC POWER CONTROL

RF power output from the final amplifier Q5015/Q5016 (both PD55025S) is sampled by C5061/C5056 and is then rectified by D5007 and D5008 (both HSM88AS). The resulting DC voltage is applied to the comparator Q5005 (TA75S01F), where the voltage is compared with a reference voltage from the Main CPU Q3014 (HD64F2238) on the CNTL Unit, to produce a control voltage for the Automatic Power Controller Q5004 (2SC4116GR) and Q5002 (2SB1122S), which regulates supply voltage to Q5001 (2SC3357).

)

F-2

)

CNTL (CONTROL

The CNTL Unit consists of 8-bit CPU Q3014 (HD64F2238), EEPROM Q3006 (BR24L32F), RX and TX speech audio circuits, and various analog switches for the CPU and repeater interconnections.

Microprocessor operational code is stored in Q3006 (BR24L32F), 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 Q3014 (HD64F2238) con- tains serial control data used for REPEATER/BASE mode control, as well as TX and RX PLL data. Crystal X3002 oscillates at 12.288 MHz, and provides stable clock timing for the Main CPU. When the repeater is powered on, the voltage at pin 62 of Q3014 (HD64F2238) becomes sta- ble, and the output of voltage detector IC Q3012 (BD4845FVE), which is tied to pin 59 (RST) of Q3014 (HD64F2238) becomes high, resetting the Main CPU.

NIT

Circuit Description

BASE OPERATION (TX, MIC-INPUT AUDIO)

Microphone input is delivered past the MIC MUTE switch Q4002 (DTC323TK), then passes through the audio am- plifier and active high pass filter at Q4001 (NJM2902V) when the signal is processed in the same manner as previously described.

F-3

Circuit Description

Note

F-4

Alignment

Introduction

The VXR-9000 has been aligned at the factory for the specified performance across the entire frequency range specified. 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 voided.

The following procedures cover the sometimes critical and tedious adjustments that are not normally required once the transceiver has left the factory. However, if damage occurs and some parts are replaced, 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 transceiver 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 must reserve 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 transceiver are clearly understood, the cause of the malfunction has been clearly pinpointed and any faulty components replaced, and the need for 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 1 GHz  AF Signal Generator  Frequency Counter: ±0.2 ppm accuracy at 1 GHz  In-line Wattmeter with 5% accuracy at 1 GHz  50-ohm, 50-W RF Dummy Load  Regulated DC Power Supply (standard 13.6V DC, 15A)  AC Voltmeter  DC Voltmeter  UHF Sampling Coupler  Microsoft® Windows® 98 or later operating system  Vertex Standard VPL-1 Connection Cable and CE60

Alignment program

Alignment Preparation & Precautions

A 50-ohm RF Dummy load and in-line wattmeter must be connected to the main 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, if connected) before proceeding.

Correct alignment requires that the ambient temperature be the same as that of the transceiver and test equipment, and that this temperature be held constant between 20 °C and 30 °C (68 °F ~ 86 °F). When the transceiver 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 this procedure are

based on 0 dBµ EMF = 1.0 µV.

G-1

Alignment

Test Setup

Setup the test equipment as shown below, apply 13.6V DC power to the VXR-9000.

50-Ohm

Dummy Load

RF Sampling

Inline

Wattmeter

Deviation Meter

Frequency

Counter

Coupler

VPL-1 Connection Cable

COM Port

The VXR-9000 must be programmed for use in the intended system before alignment is attempted. The RF 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 in the transceiver is preset as the chart below.

Signal Generator

TX ANT RX ANT

VXR-9000

MIC

DC INPUT

Power Supply

13.6 VDC

The Alignment Tool Outline

Installation the tool

Install the CE60 (Clone Editor) to your PC. The re-alignment for VXR-9000 may use the "Alignment" menu of CE60.

Basic sequence

The data displayed in screen of this tool is temporary data, and there is fear that the consistence of the displayed data and the data in the transceiver is failure when you do not keep the sequence which is specified below.

1. Enter the alignment mode

2. Data upload

3. Align data

4. Data download

When finish the alignment one parameter, the tool ask you "Update this data?" If you select "Yes," the temporary data is updated. If you select "Yes," the tool downloaded data to the transceiver.

Menu of the Tool (BASIC ALIGNMENT

In the Basic Alignment mode, the aligned data written in the radio will be able to re-align its alignment data. In this mode, there are many items to align with three point (low edge, center and high edge) except "VCO," "RX Tune" and "Mod Balance." The value of each parameter can be changed to desired position by "" / "" arrow key for up/down, direct number input and drag the mouse.

)

CHANNELS FREQUENCY (SIMPLEX

Band-LOW 450.000 MHz Band-MID 470.000 MHz Band-HIGH 490.000 MHz

)

The alignment mode is accessed by "Alignment mode" command from the computer whilst switching on. And the alignment tool operates it automatically.

During the alignment mode, normal operation is suspended. Use the alignment tool program running on PC.

To enter the Basic Alignment Mode, select "Basic Alignment" in the main menu "Radio." It will start to "Upload" the written personalized data from the radio and to "Download" alignment data to the radio. Then pressing the button "OK" will start the Basic Alignment Mode.

Note; when all items are aligned, it is strongly recommended to align according to following order. The detail information is written in the help of CE60 (Clone Editor).

1. RX VCO Tune Voltage (RX VCO)

2. TX VCO Tune Voltage (TX VCO)

3. PLL Reference Frequency (Frequency)

4. RX Sensitivity (RX Tune)

5. Squelch (SQL)

6. TX Power

7. Modulation Balance <Wide>

8. Modulation Balance <Narrow>

9. Maximum Deviation <Wide>

10. Maximum Deviation <Narrow>

11. Sub-Audio (CTCSS/DCS) Deviation

G-2

(

8.0 V

MAIN Unit

Circuit Diagram

)

2.2 V

1.3 V

2.2 V

Frequency: 470.20 MHz

2.2 V

(

468.80 MHz

4.9 V

)

7.1 V

8.9 V

0.9 V

(

8.4 V

)

8.0 V

0 V

(

4.2 V

8.9 V

)

2.3 V

1.5 V

0.4 V

WIDE: 0.1 V NARROW: 7.5 V

8.6 V

1.3 V

LOCK: 0 V

UNLOCK: 5.0 V

8.0 V

0.5 V

2.3 V

LOCK: 0 V

UNLOCK: 5.0 V

H-1

MAIN Unit

Note

H-2

MAIN Unit

Parts Layout (Side A)

BA DC FE G

M51132FP

(Q1006, 1056)

MB15A02PFV1

(Q1008, 1052)

TA31136FN

(Q1028)

NJM2904V

(Q1004, 1020, 1050)

2SK508 (K52)

(Q1021, 1026,

1049)

NJM2902V

(Q1001, 1017, 1025)

TDA2003

(Q1057)

2SA1586Y (SY)

(Q1051)

2SC3357 (RK) (Q1009, 1030)

2SC4116GR (LG)

(Q1007, 1033, 1045,

1046, 1061)

2SC5226 (R22)

(Q1022, 1026, 1059)

UN5215 (8E)

(Q1047)

SPM5001

(Q1018)

1SS302 (C3)

(D1003)

MA143 (MC)

(D1014, 1015, 1023,

1024, 1025, 1026)

RN739F (5F)

(D1002, 1016, 1017)

H-3

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