HYT RPU416A User Manual

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Page 1

CONTENTS

General 2

Mode Com bination

RPU416A Circuit Description

RPU416A Software Description

RPU416A Parts List

RPU416A Adjust Description

Disassembly fo r Repai r

Exploded View

Packing

RPU416A PC Board View

RPU416A Block Diagram

RPU416A Level Diagram

RPU416A Schematic Diagram

Main T echn i cal Specif ic atio ns

Page 2

General

This manual is intended for use by experie nced technicia ns familiar w ith similar t ypes of commercial grade communications equipment. It contains main required service information and data for the equipment.

The followi ng preca utio ns are recommended f or per s onal safety: ! DO NOT transmit until all RF connectors are verified secure and any open connectors are

properly ter minated.

! SHUT OFF and DO NOT operate this equipme nt near electrical bl asting caps or in an explos ive

atmosphere.

! This equipment sho uld be maintai ned by qualified technicia ns only.

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Mode Combination

1. Mode

User mode: Turn on the power to enter. PC mode"Set and adjust w ith PC softw ar e or programmer.

2. Parts descr iption:

(1) Antenna (2) Channel (f r equency) selector knob

Turn the knob to choose channel from 1~16( channel 16 may be set by distr ibutor as sc an channel).

(3) LED light

Lights red w hile trans mitting, green while recei ving a signal. Flashes red w hen t he bat ter y voltage is low while trans mit ti ng.

(4) Power switch/ Volume control

Turn the knob clockwise to sw itch the transceiver ON, anti-clockw ise to turn off the power till there is a “click” sound, rotate to adjust the volume level.

(5) Speaker (6) Microphone (7) PTT switch (push to talk)

Press the button while transmitt ing, and release it while receiving.

(8) Monitor key

Press it to shut off squelch, noise could be heard, release to connect squelch.

(9) Speaker/microphone jack (10 ) Belt clip (11) Battery (TB-82)

RPU416A Circuit Description

1. Frequency conf igurat io n

The receiver utili zes double co nversio n. The first IF is 38.85M Hz and the second IF is 450kHz. The first

local oscillator sig nal is supplied from the PLL circ uit.

The PLL circuit in the transmitter generat es t he necessary frequencies. Fig.1 s hows t he frequencies. RPU416A frequency ra nge: 450MHz—470MHz

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ANT

ANTSW

450KHz

MCF

AMP AMP

38.85MHz

SYSTEM

multiply

TCXO 12.8MHz

AMP

VCO

MICPLL AMP

MIC

Fig.1 F requency conf iguration

2. Receiver

The receiver is double co nversio n superheterody ne.

1) Front - end RF amplifier

An incoming signal from the antenna is applied to a Preamplifier (Q203) after passing through a transmit/ receive switch circuit ( K102 and D103 are off) and a 3-pole LC filter. After t he signal is a mplified (Q203) , the signal is filtered by a band pass filter (a3- pole LC filter ) t o eliminate unwanted signals bef or e it is passed to the first mixer. The voltages of t hese diodes are control led by t o track the MPU. (See Fig. 2- b)

ANT

CF200

D102 D103

APC

IC403 MCU

TUNE

BPF

L208-L211

RF AMP

Q203

BPF

L214.L203.L204

MIXER

Q202

1st Local OSC

(PLL)

MCF

XF200

TCXO

IF AMP

Q201

IF.MIX IC200

multiply

AF AMP LPF.HPF

IC300

WIDE/NARROW SW Q303

AF PA AMP

IC302

Fig. 2 Receiver s ection confi guration

2) First mixer

The signal from the RF amplifier is heterodyned with the first local oscillator signal from the PLL frequency synthesizer circuit at the first mixer (Q202) to creat e a 38.85 MHz first intermediat e frequency (1st IF) signal. The first IF signal is then fed through two monolithic crystal filters (MCFs: XF200) to further remove spurio us signals.

3) IF a mplif ie r

The first IF signal is amplified by Q201, and the n enters IC 200 (FM processing IC). The signal is

heterodyned again with a second local oscillator signal within IC200 to create a 450kHz second IF

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RPU416A Circuit Description

signal. The second IF signal is then fed through a 450kHz ceramic filter (CF200) to further eliminate unwanted

4) AF

The recovered AF signal obtai ned from IC200 is amplified by I C300 (1/4), filtered by the I C300 low-pass filter (2/4) and IC300 high-pass filter (3/4) and (4/4), and de-emphasized by R303 and C306. The AF signal is then passed through a WIDE/NARROW switc h ( Q 303) . The processed AF signal passes t hro ugh an AF volume control and is amplified to a sufficient level to drive a loud speaker by an AF pow er amplifier (IC302).

5) Squelch

Part of the AF signal from the IC enter s the FM IC agai n, and t he noise c ompone nt is amplif ied and rectif ied by a filter and an amplifier to produce a DC voltage corresponding to the noise level.

The DC signal from the FM IC goes t o the ana log por t of the microprocessor (I C403). IC403 deter mines whether to output sounds fr om the speaker, IC403 sends a high sig nal to the MUTE and AFCO lines and turns IC302 on through Q302, Q304, Q305, Q306 and Q307. (See Fig.3)

signals befor e it is amplified and FM det ected in IC200.

amplifier

FM IF IC200

IF AMP DET

DET HPF

AMP

IC 300

AF AMP LPF HPF

Q302SWIC302

AF/PF AMP

Q307

Q304.Q305.Q306 SW

IC301

LPF

IC403 MPU

MUTE

AFCO

562676

Q303 W/N SW

BUSY

Fig. 3. AF Amplifier and squelch

6) Receiving signaling

QT/DQT

300 Hz and higher audio frequencies of the output signal from IF IC are cut by a low-pass filter (I C301). The resulting signal enters the microprocessor (IC403). IC403 determines whether the QT or DQT matches the preset value, a nd controls t he M UTE and AFCO and t he s peaker o utp ut sounds according to t he s quel ch r esults.

3. PLL frequency synthesizer

The PLL circuit generates the first local oscillat or signal for r ec ept ion and the RF signal for tr ansmission.

1) PLL

The frequency step of t he PLL circuit is 5 or 6.25kHz. A 12.8MHz reference oscillator s ignal is divided at IC1 by a fixed counter to produce the 5 or 6.25kHz reference fr equency. The voltage controlled oscil lator (VCO) output signal is buffer amplified by Q 6, then divided in IC1 by a dual-mod ule

RPU416A Circuit Description

programmable counter. The divided signal is compared i n phase with the 5 or 6.25kHz reference signal in the phase comparator i n IC1. The output signal from the phase comparator is filter ed t hrough a low- pass filter and passed to t he VCO to control the oscillator f r equency. (See Fig. 4 of Next Page)

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PLL DATA

REF OSC

I/N

I/M

PLL IC IC1

5KHz/6.25KHz

PHASE

COMPARATOR

5KHz/6.25KHz

CHARGE

PUMP

LPF

D2.4Q4TX VCO

D1.3Q3RX VCO

BUFF AMP

Q5.7

T/R SW

Q2 RF AMP

12.8MHz

Fig. 4. PLL circuit

2) VCO

The operati ng frequency is generated by Q4 in transmit mode and Q3 in receive mode. The oscillator frequency is controlled by apply ing the VCO control volt age, obtained from the phase comparator, to t he varactor diodes (D2 and D4 in transmit mode and D1 and D3 in receive mode) . The T/R pi n is set hig h i n receive mode causing Q5 and Q7 to turn Q4 off, and turn Q3 on. T he T/R pin is set low in transmit mode. The outputs fr om Q3 and Q4 are amplified by Q6 and sent to the buffer amplifiers.

3) UNLOCK DETECT OR

If a pulse signal appears at t he LD pin of I C1, an unlock conditio n occurs, and the DC voltage obtai ned from D7, R6, and C1 causes t he voltage applied to t he UL pin of t he microprocessor to go low. When the microprocessor detects this condition, the transmitter is disabled, ignoring the push-to-talk switch input signal. (See Fig. 5)

IC1

PLL IC

IC403

MPU

4. Transmitter

1) Transmit audio

The modulatio n signal from the microphone is amplified by IC500 (1/ 2), passes through a pr eemphasis circuit, and amplified by the ot her IC500 (1/2) to perform IDC operation. The sig nal then passes thro ugh a low-pass f ilter (splatt er filter) (Q501 and Q502) and cuts 3kHz and higher frequencies.

Fig. 5. Unlock detector circ uit

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RPU416A Circuit Description

ANT

The resulting sig nal goes to the VCO through the VCO mod ulation terminal for direct FM modulation. ( See Fig. 6)

2) QT/ DQT encoder

A necessary signal for QT/DQT encoding is generated by IC403 and FM-modulated to the PLL refer ence signal. Since the refer ence OSC does not mod ulate the loop characterist ic frequency or higher, modulatio n is perfor med at t he VCO side by adjusting the balance. ( See Fig. 6)

IC500(1/2)

MIC AMP PREEMPHASIS

IC500(1/2)

IDC

Q501.502

LPF

(SPLATTER FILTER)

VR501

MAX DEV D5.Q4

MIC

Q503 SW

MUTE

IC403

QT/DQT

VR500 BALANCE

VCO

X1.IC1

REFERENCE

OSC

Fig. 6. Transmit audio QT/DQT

3) RF amplifier

The transmit signal obtai ned from the VCO buffer amplifier Q100, is amplified by Q101 and Q102. This amplified signal is passed to the power amplifier, Q105 and Q107, w hich consists of a 2-stage FET amplifier a nd is capable of produci ng up to 4W of RF power (See Fig. 7-b)

AMP

Q101.102

DET

Q103.Q104

B SW

DRIVE AMP

Q105

APC

IC100

Q109

FINAL AMP

Q107

ANT SW

D101 LPF

APC

TH102

Q110

4) ANT switch and LPF

The RF amplifier output signal is passed t hro ugh a low-pass filter networ k and a transmit/receive

Q108 SW

Fig. 7 APC system

Q106 SW

ANT SW D102.103

Title

Number RevisionSize

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RPU416A Circuit Description

switching circuit before it is passed to the antenna terminal. The transmit/receive switching circuit is comprised of D101, D102 and D103. D102 and D103 turned on (conductive ) in transmit mode and off (isolated) in receive mode.

5) APC

The automatic power control (APC) circuit stabilizes the transmitter output power at a predetermined level by sensing the drai n curre nt of the final amplifier Field Effect Transistor (FET). The voltage obtai ned from the above drain current with a reference voltage which is set using the microprocessor. An APC voltage proport ional to t he difference betw een the sensed voltage and the reference voltage appears at the o utput of IC100 (1/ 2). This output voltage co ntrols t he gate of t he FET power amplifier, which keeps the transmitter output power can be varied by the microprocessor which in turn changes the reference voltage and hence , the output pow er.

6) Terminal protect io n circuit

When the thermistor (TH102) reaches about 80", the protection circuit turns on Q110 to protect transmitt ing final amplifier ( Q 107) .

5. Power supply

A 5V reference power supply [5M] for the control circuit is derived from an internal battery. This refer ence is used to provide a 5V supply in transmit mode [5T] ,a 5V supply in receive mode [5R] , and a 5V, supply common in both modes [5C] based on the control signal sent from the microprocessor.

6. Control system

The IC403 CPU operates at 7.37MHZ. This osc illator has a circuit t hat shift s the frequency accordi ng to the EEPROM data.

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RPU416A Software Specifications

.Specifications:

1. Use mechanical knob to choose fr om 16 channels. Frequency ra nge: UHF: 450~470MHz

2. Monitor

3. Auto power saving

4. Audio alarm

5. Aut o s quelc h control ( 0~9 level)

6. Timing

7. Channel space 25kHz/12.5kHz(Wide/ Narrow )

8. CTCSS & DQT enc ode

9. CTCSS & DQT decode

10.Two Tone Signal decode

11.Two Tone Signal encode

12.Busy channel lock

13.Clock frequency de viat io n

14.Scan

15.PC mode

16.PC modifying mode

17.Wire clone

18.Manual modifying mode

.Description:

1. User mode: general radio mode

2. PC mode:

Make settings through external programmer or PC progr am soft ware: (1) Receive frequency & Transmit frequency (2) Receive signaling & Transmit signaling (3) Lock busy cha nnel (4) Clock frequency deviation (5) Timing (6) Squelch leve l s e le c tivit y (7) Power saving (8) Audio Alarm (9) Channel space 25kHz/12.5kHz(Wide/Narr ow) (10) Monitor mode (11) Scan mode (12) Reset scan mode (13) Scan priority

3. PC mod ify mode:

Make settings through external programmer or PC progr am soft ware:

RPU416A Software Specifications

(1) Frequency stability (2) RF power (3) Low power alarm (4) Squelch (level 9&3) (5) CTCSS deviation (Wide/Narrow). (6) DQT devi ation (Wide/ Narrow). (7) Receive sensitivity(low"medium"high)

4. Wire Clone:

Press MO NI to turn on the power , enter wir e clone mode 2 seconds later, press PTT, Begin cloning while red lights, f inis h while light goes out.

5. Mode setting:

(1) Shor t cut t he SELF on PCB, and tur n o n the power till “BEEP” . (2) Set c hannel selector knob to corr esponding place according to the model(1-16)

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(3) Press [MONI],then press [PTT], to set the cha nnel, channel data and initial data. (4) Turn off the power, disconnect SELF on PCB to end mode sett ings. (5) Remarks:

The old data(frequency, CTCSS/DQT, channel function) will be deleted once set the new mode by pressing MONI AND PTT , part of the function also would be changed. Therefore, do not set this operation unless change the EEPROM, etc.

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RPU416A Software Specifications

(6) TC- 368(2) channel freque ncy diagra m (af ter setting):

1CH 2CH(Central) 3CH(L) 4CH(H)

No Model Frequency(MHz)

Initial (MHz)

IF(MHz)

Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz) Tx(MHz) Rx(MHz)

1 136.000~149.995 140.000 +38.85 143.100 143.100 143.000 143.100 136.000 136.100 149.975 149.900 2 150.000~173.995 150.000 +38.85 162.100 162.100 162.000 162.100 150.000 150.100 173.975 173.900 3 400.000~419.995 410.000 -38.85 410.100 410.100 410.000 410.100 400.000 400.100 419.975 419.900 4 RPU416A 450.000~469.995 450.000 -38.85 460.100 460.100 460.000 460.100 450.000 450.100 469.975 469.900 5 350.000~369.995 360.000 -38.85 360.100 360.100 360.000 360.100 350.000 350.100 369.975 369.900 6 370.000~389.995 380.000 -38.85 380.100 380.100 380.000 380.100 370.000 370.100 389.975 389.900 7 220.000~239.995 230.000 -38.85 230.100 230.100 230.000 230.100 220.000 220.100 239.975 239.900 8 240.000~259.995 250.000 -38.85 250.100 250.100 250.000 250.100 240.000 240.100 259.975 259.900

9 406.000~429.995 410.000 -38.85 418.100 418.100 418.000 418.100 406.000 406.100 429.975 429.900 10 144.000~147.995 145.000 +38.85 146.100 146.100 146.000 146.100 144.000 144.100 147.975 147.900 11 336.000~367.995 350.000 -38.85 352.100 352.100 352.000 352.100 336.000 336.100 367.975 367.900 12 268.000~395.995 380.000 -38.85 382.100 382.100 382.000 382.100 268.000 268.100 395.975 395.900 13 430.000~439.995 430.000 -38.85 435.100 435.100 435.000 435.100 430.000 430.100 439.975 439.900 14 438.000~449.995 440.000 -38.85 444.100 444.100 444.000 444.100 438.000 438.100 449.975 449.900 15 465.000~494.995 480.000 -38.85 480.100 480.100 480.000 480.100 465.000 465.100 494.975 494.900 16 490.000~519.995 500.000 -38.85 505.100 505.100 505.000 505.100 490.000 490.100 519.975 519.900

Initialization data of channel ar e in the above diagram CH1-CH4, the modify f requency is reset t o initial data. Frequency of C H5~CH14 are the same with CH1. The sig naling of CH5 and CH10 is 67.0Hz; the signaling of CH6 and CH11 is 151.4 Hz; the signaling of CH7, CH12 is 250.3Hz; the signaling of CH8 and CH13 is 423(DQT); t he signaling of CH9 and CH14 is -423(DQT). CH1~CH9 are Wide, CH10~C H14 are Narrow.

RPU416A

Page 12

RPU416A Software Specifications

6. Manual Adjust Mode:

Press PTT and MONI simultaneously to turn on the power"enter manual Adjust mode out 3 seconds later. Choose the settings by turning the channel selector knob 1-12CH, use PTT (upward) or MONI (downward) to adjust (Notice: MIC shouldn’t be connected w ith exter nal cable while modifying), 1~ 12CH are define d as f ollows : (1) Frequency stabilit y (2) RF power (3) Low power alarm (4) Receiver sensitivity (center f r equency adjust) (5) Receiver sensitivity (low frequency adjust) (6) Receiver sensitivity (high frequency adjust) (7) Squelch (level 9) (8) Squelch (level 3) (9) CTCSS deviation (Wide) (10) CTCSS dev iation ( Narrow ) (11) DQT deviatio n (Wide) (12) DQT deviatio n (Narr o w)

13~16CH are used for adjusti ng trans mitter and recei ver. Press PTT to transmit; Pr ess MO NI to choose: Wide/Narr ow, one Beep sound is Narrow, two Beep sound is W ide. 13~16CH are

defined as follows: (13) center f r equency (discr epancy of tr ansmissio n and recei ve frequency is 0.1MHz). (14) Low est f r equency (discrepancy of t r ansmission and recei ve frequency is 0.1MHz). (15) Highest f r equency (discrepancy of tr ansmission and recei ve frequenc y is -0.075MHz). (16) center f requency: sends 250.3 Hz CTCSS sig nals (discrepancy of t ransmission and receive

frequency is 0.1MHz).

Note: To enter and shut off manual adjust mode by short cut the SELF. Turn on the power, and enter

settings mode, the manual function is automati call y on. Press [PTT] to disable manual modif y. Once this function is disabled, this mode is not accessibl e, kindly suggest di sable this mode after adjust.

. CPU:

CPU control M38034M 4

Pin No. Port

name

1 TI I Input QT/DQT signal 2 BUSY I Input busy signal 3 BATT I Detect battery voltage 4NCINC 5 TO O Output QT/DQT 6 BEEP O Beep output 7NCINC 8 ENC0 I Input encode 9 ENC1 I Input encode

10 ENC2 I Input encode 11 ENC3 I Input encode

12 NC I NC 13 PTT I [PTT] input ,connect RXD 14 TXD O RS-232C output

RPU416A Software Specifications

15 RXD I RS-232C input

x16 MONI I [MONI] input

17 SELF I Program L: set up mode 18 CNVSS I Connect VSS 19 RST I Reset 20 INT0 I Power detection 21 NC I NC 22 XIN I Oscillator(7.3728MHz)

I/O Function

Page 13

23 XOUT O Oscillator 24 VSS I Grounding 25 SHIFT O Clock frequency deviation H: unlock 26 PABC O MOS FET power H: unlock 27 WNRC O Audio referential sensitivity L: narrow 28 WNTC O Max deviation H: narrow 29 NC I NC 30 SDA I/O EEPROM data cable 31 SCL O EEPROM clock cable 32 UL I Lock circuit detector L: unlock 33 DT O Common data output 34 CK O Common clock output 35 LE O PLL IC H: lock up 36 5MC O Power control except CPU and EEPROM L: unlock 37 AFCO O AF amplifier H: unlock 38 RX O TX/RX VCO H: receive 39 GLED O Green light control H: light 40 RLED O Red light control H: light 41 SAVE O Power saving control H: power saving OFF 42 MUTE O Squelch control H: mic squelch L:AF squelch 43 5RC O Receiver power control L: unlock 44 5TC O Transmitter power control H: unlock 45 NC I NC 46 NC I NC 47 NC I NC 48 NC I NC 49 NC I NC 50 NC I NC 51 NC I NC 52 NC I NC 53 NC I NC 54 NC I NC 55 VCCN O Frequency output 56 APC O TX:auto frequency output RX:BPF tune output 57 VCC I CPU input power 5V 58 VREF I Connect with VCC 59 AVSS I Connect with VSS 60 NC I NC 61 NC I NC 62 NC I NC 63 NC I NC 64 TIBI I QT/DQT exterior circuit central point input

Page 14

RPU416 A Adjust Descriptio n

Use programmer or PC software to program RPU416A, or by manual program, refer to”RPU416A

software description ” for the manual program and mode settings.

. Instrument:

1. Synthesized test instrume nt 1 set

2. Scanner 1 set

3. 3A/10V power 1 set

4. Digital Voltmeter 1 set

5. 3A DC Ammeter 1 set

. Adjust:

1. Initiali zat ion It is necessary to init ialize the t ranscei ver because there is useless data in EEPROM . Short cut the SELF o n PCB, t urn on the pow er till there comes t he sound ”BEEP”, place the channel selector knob, press [M O NI], then press [PTT], to begin initializing the channel and other data. Please r ef er to the outcome of initialization at”RP U416A sof t w are description”.

2.Adjustment: The adj ustment of RPU416A, some are conducted in normal mode, some are i n manual program mode. Turn on the power and ent er the normal mode., at t he same time, pr ess the PTT and MONI to turn on the transceiver"enter the manual program mode 3seconds later.(refer to”RPU416A software description” manual program mode).

VCO SECT ION:

measurement Adjustment

ITEM CONDITION

Test equip terminal part Method

Specifications/

Remarks

1.Setting 1.power 7.5V

2.Transmit VCO lock voltage

3.Receive VCO lock voltage

1.CH: TX HIGH 3.7V±0.1V

2.CH: TX LOW check RPU416A >1V

1.CH: RX HIGH 3.7V±0.1V

2.CH: RX LOW

Digital

Volt meter

CV TC1

check

RPU416A>1V

Note: If unlock VCO, check adjustment is enabled in manual mode.( signal c ould be transmitted regardl es s of the lock of VCO in manual mode).

Page 15

RPU416 A Adjust Descriptio n

Adjust the r eceiver sect ion:

Item Condition

1:CH:RX center turn to channel 4 in manual mode

4.Bandpass

filter

5.Sensitivity (Wide)

2. CH: RX LOW turn to channel 5 in manual mode

3.CH:RX HIGH turn to channel 6 in manual mode

1. CH:RX center Turn to channel 13 in manual mode Dev : Wide

2. CH: RX center Turn to channel 14 in manual mode Dev : Wide

3. CH: RX center Turn to channel 15 in manual mode Dev : Wide

(enter manual mode)

Measurement Adjustment

Test equip Terminal parts Method

Adjust the undee to the top,

the bandwidth is about

10MHz, the sign of central

frequency is in the middle of

the undee

Adjust the undee to the top to

receive Low frequency , the sign is on the left of the top of the undee

Adjust the undee to the top to

receive

High frequency , the sign is on

the right of the top of the

undee

check

Spectrum

analyzer

Synthetical

test

SSG output :

-118dBm

MOD:1kHz

DEV:±3kHz

FILER: 0.3-

3.4kHz

ANT . TP2

ANT

TC202 TC203

PTT(up) MONI

(down)

PTT(up)

MONI

(down)

Specifications

/Remarks

SINAD: 12dB

or higher

6.Sensitivity (Narrow)

7.Squelch

1. CH: RX center Turn to channel 13 in manual mode Dev : narrow

2. CH: RX center Turn to channel 14 in manual mode Dev : narrow

3. CH: RX center Turn to channel 15 in manual mode dev : narrow

1.CH: RX center Turn to channel 7 in manual mode

2.CH:RX center Turn to channel 8 in manual mode

Synthetical

test

SSG output :

-116dBm

MOD:1kHz

DEV:±1.5kH

z FILER:

0.3-3.4kHz

Synthetical

test SSG

output : -

117dBm

Synthetical

test SSG

output : -

125dBm

ANT

PTT(up)

MONI

(down)

check

Level 9

Adjust to close the squelch.

Level 3

Adjust to close the squelch.

SINAD: 12dB

or higher

The squelch

must be closed

The squelch

must be closed

Page 16

RPU416 A Adjust Descriptio n

Adjust the t r ansmitter sect ion:

Item Condition

Test equip Terminal Parts Method

Measurement Adjustment

Specifications

/Remarks

8.Transmit frequency

9.Power

10.MAX DEV

CH: TX center Turn to channel 1 in manual mode

1.CH:TX center Turn to channel 2 in manual mode

2.CH: TX LOW Turn to channel 3 Press PTT

3.CH:TX HIGH Turn to channel 4 Press PTT

1.CH: TX center, turn to channel 1 in manual mode, dev: wide Press PTT

2.CH: TX center, turn to channel 1 in manual mode, dev: narrow Press PTT

Synthetical

test

Synthetical

test

Ammeter

Synthetical

test LPF:

15kHz

AF:1kHz

120mV

ANT

MIC

PTT(up)M ONI(down)

VR501 Adjust it to:4.2kHz±100Hz Wide

Adjust it to center frequency Error<150Hz

Adjust it to:

3.7<Po<

Check:1.8kHz-2.2kHz Narrow

4.5W

I<1.6A

Adjust it to:

4.5 W

I<1.6A

Adjust it to:

4.5W

I<1.6A

11.MIC SENS

12.DQT/QT

13.QT DEV

1.CH: TX center, turn to channel 1 in manual mode, dev: wide Press PTT

2.CH: TX center, turn to channel 1 in manual mode, dev: narrow Press PTT

1.CH: TX center, turn to channel 9 in manual mode

2.CH: TX center, turn to channel 1 in manual mode, press PTT

1.CH: TX center, turn to channel 9 in manual mode

Synthetical

test

FILER:

0.3-3.4kHz AF:1kHz

12mV

Synthetical

test LPF:

300Hz

Synthetical

test

LPF:300Hz

VR501 Check:2.2kHz-3.6kHz Wide

ANT

MIC

ANT VR500

ANT

PTT"up"M ONI"down

Check:1.1kHz-1.8kHz Narrow

Adjust VR500,the test value of

on condition 1 & condition 2 is

consistent, the difference

value<20Hz

Adjust it to:0.75kHz±50Hz Wide

67.0Hz

CTCSS

250.3Hz CTCSS

Page 17

RPU416 A Adjust Descriptio n

14.DQT DEV

15.Low

Battery level

2.CH: TX center, turn to channel 1 in manual mode

1.CH: TX center, turn to channel 11 in manual mode

2.CH:TX center, turn to channel 1 in manual mode

Turn to channel in manual mode,

djust the batter

to 5.8V

Synthetical

test

LPF:300H

Digital

voltmeter

ANT

PTT"up"M ONI"down

PTT"up"M ONI"down"Adjust so that the LED flashes

Adjust it to:0.35kHz±50Hz Narrow

Adjust it to:0.75kHz±50Hz Wide

Adjust it to:0.35kHz±50Hz Narrow

Note: In manual mode , channel selector 1-12, MIC can’t connect li ne, after adjust compl ete, short SELF, enter mode settingpress PTT, disable m anual adjust.

Page 18

Disassembly for Repair

Separating the case assembly from the chassis

1. Remove the two knobs # and three round nuts $.

2. Remove the two screws %.

3. Expand the right and left sides of the bottom of the case asse mbly"lift the chassis, and remove it from the case assembly.

4. Taking care not to cut the speaker lead, open the chassis and case assembly.

Removi ng the le ver

Raise the lever on the lower case, insert a small flat screwdriver into the space between the case and lever , open the case carefully and lift the lever off .

Note: Do not force to separate the case from the lever.

Page 19

Exploded View

Packing

Page 20

Page 21

RPU416A Level Diagram

Rx Section

SG output level for obtaining 12Db/SINAD when injected to each point Modulate the AF level with a frequency of 1kHz and deviation of 1.5kHz

through a 470pF coupling capacitor. (Narrow), 3kHz(Wide) . Then take the signal form the signal generator

Measure the 1

Local level on a RF VTVM. when the AF output has been adjusted to 0.63Vrms with the AF vo l .

Tx Section

Measure the audio frequency on an AFVTVM and radio frequency on a RF VTVM at high impedance . Set t he MIC input to obtain a modulatio n factor of 60%

with the transmit frequency at center and a modulatio n frequency of 1kHz .

ANT

L112

C145

R22 4

L20 3, L21 4

1st Local

0.1Vrms

IC200

C212

Q201

R21 0

Q307

IC302

IC300

-116.5dBm -113dBm -98dBm -103dBm -104dBm -106.5dBm -103dBm 1018mVrms 175mVr ms 23. 5mVrms 0.63Vrms

L20 8

RF cen ter IF 38.85MHz

AF 1kHz

Q202

R21 1

R21 7

XF200

Q203

VR50 1

IC500

MIC

Q100

Q101 Q102

AF VTVM RF VTVM

Q107

Q105

C114C108C106

C100

C40

ANT

16mVrms 430mVrms 310mVrms 0.15Vrms 0.44Vrms

0.8Vrms

0.62Vrms

Page 22

Main Technical Specific ations

Frequency range 450 MHz ~470 MHz

Channel 16

Channel space 25kHz / 12.5kHz

Antenna impedance 50

Transmitter

impedance

Input voltage 7.2V DC

Frequency stability ±2.5×10

Output power 4.0±0.5W

Operating sensitivity 12±3mV

Audio distortion 5%

Modulation limiting 5kHz / 2.5kHz

2K&

-6

Transmitter

-6

Bandwidth 16 kHz/8kHz

Modulate specialty  '3dB

Spurious RF 7.5(W

Adjacent power -65 d B / -55dB

Receiver

Reference sensitivity Precede 0.28(V / 0.35(V

Squelch turnon

sensitivity

Audio frequency 500mW

Audio deviation 7%

Operating bandwidth "±7 kHz"/"±3.5 kHz"

Audio response +2dB -8dB

Channel restrain -8 d B

Obstruct 85d B

Selectivity 65 d B / 60dB

0.4(V

Spurious response 60 d B

Intermodulation 60 d B