HYT RPU416A Manual Download Page 2

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General

This manual is intended for use by experienced technicians familiar with similar types of commercial

grade communications equipment. It contains main required service information and data for the
equipment.

The following precautions are recommended for personal safety:

DO NOT transmit until all RF connectors are verified secure and any open connectors are

properly terminated.

SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive

atmosphere.

This equipment should be maintained by qualified technicians only.

Summary of Contents for RPU416A

Page 1: ...PU416A Software Description 10 RPU416A Parts List 16 RPU416A Adjust Description 26 Disassembly for Repair 30 Exploded View 31 Packing 32 RPU416A PC Board View 33 RPU416A Block Diagram 37 RPU416A Level Diagram 39 RPU416A Schematic Diagram 41 Main Technical Specifications 49 ...

Page 2: ...information and data for the equipment The following precautions are recommended for personal safety DO NOT transmit until all RF connectors are verified secure and any open connectors are properly terminated SHUT OFF and DO NOT operate this equipment near electrical blasting caps or in an explosive atmosphere This equipment should be maintained by qualified technicians only ...

Page 3: ...ckwise 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 transmitting 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 config...

Page 4: ...e MPU See Fig 2 b B C C B ANT D102 D103 BPF Q203 RF AMP L208 L211 BPF L214 L203 L204 MCF XF200 IF AMP Q201 MIXER Q202 CF200 IF MIX IC200 AF AMP LPF HPF IC300 AF PA AMP IC302 SP WIDE NARROW SW Q303 X3 multiply Q1 TCXO 1st Local OSC PLL TUNE APC IC403 MCU Fig 2 Receiver section configuration 2 First mixer The signal from the RF amplifier is heterodyned with the first local oscillator signal from the...

Page 5: ...IF AMP DET DET HPF AMP IC 300 AF AMP LPF HPF Q302 SW IC302 AF PF AMP Q307 SW SP Q304 Q305 Q306 SW Q303 W N SW IC301 LPF 5 62 67 6 BUSY MUTE AFCO TI IC403 MPU 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 IC301 The resulting signal enters the microprocessor IC403 IC403 determines whether t...

Page 6: ... The outputs from Q3 and Q4 are amplified by Q6 and sent to the buffer amplifiers 3 UNLOCK DETECTOR If a pulse signal appears at the LD pin of IC1 an unlock condition occurs and the DC voltage obtained from D7 R6 and C1 causes the voltage applied to the UL pin of the microprocessor to go low When the microprocessor detects this condition the transmitter is disabled ignoring the push to talk switch...

Page 7: ...Q4 VCO VR500 BALANCE X1 IC1 REFERENCE OSC QT DQT IC403 TO MUTE Q503 SW Fig 6 Transmit audio QT DQT 3 RF amplifier The transmit signal obtained from the VCO buffer amplifier Q100 is amplified by Q101 and Q102 This amplified signal is passed to the power amplifier Q105 and Q107 which consists of a 2 stage FET amplifier and is capable of producing up to 4W of RF power See Fig 7 b D C B A Title Number...

Page 8: ... voltage appears at the output of IC100 1 2 This output voltage controls the gate of the 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 power 6 Terminal protection circuit When the thermistor TH102 reaches about 80 the protection circuit turns on Q110 to protect transmitting final amp...

Page 9: ...ive signaling Transmit signaling 3 Lock busy channel 4 Clock frequency deviation 5 Timing 6 Squelch level selectivity 7 Power saving 8 Audio Alarm 9 Channel space 25kHz 12 5kHz Wide Narrow 10 Monitor mode 11 Scan mode 12 Reset scan mode 13 Scan priority 3 PC modify mode Make settings through external programmer or PC program software RPU416A Software Specifications 1 Frequency stability 2 RF power...

Page 10: ...off the power disconnect SELF on PCB to end mode settings 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 ...

Page 11: ...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 43...

Page 12: ...s 0 1MHz 14 Lowest frequency discrepancy of transmission and receive frequency is 0 1MHz 15 Highest frequency discrepancy of transmission and receive frequency is 0 075MHz 16 center frequency sends 250 3Hz CTCSS signals discrepancy of transmission 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...

Page 13: ... 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 5...

Page 14: ... outcome of initialization at RPU416A software description 2 Adjustment The adjustment of RPU416A some are conducted in normal mode some are in manual program mode Turn on the power and enter the normal mode at the same time press 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 SECTION measuremen...

Page 15: ... RX center Turn to channel 13 in manual mode Dev Wide 2 CH RX center Turn to channel 14 in manual mode Dev Wide 5 Sensitivity Wide 3 CH RX center Turn to channel 15 in manual mode Dev Wide Synthetical test SSG output 118dBm MOD 1kHz DEV 3kHz FILER 0 3 3 4kHz ANT SP check SINAD 12dB or higher 1 CH RX center Turn to channel 13 in manual mode Dev narrow 2 CH RX center Turn to channel 14 in manual mod...

Page 16: ...st it to 4 2kHz 100Hz Wide 10 MAX DEV 2 CH TX center turn to channel 13 in manual mode dev narrow Press PTT Synthetical test LPF 15kHz AF 1kHz 120mV ANT MIC Check 1 8kHz 2 2kHz Narrow 1 CH TX center turn to channel 13 in manual mode dev wide Press PTT VR501 Check 2 2kHz 3 6kHz Wide 11 MIC SENS 2 CH TX center turn to channel 13 in manual mode dev narrow Press PTT Synthetical test FILER 0 3 3 4kHz A...

Page 17: ...ter turn to channel 12 in manual mode Synthetical test LPF 300H ANT PTT up M ONI down Adjust it to 0 35kHz 50Hz Narrow 15 Low Battery level Turn to channel 3 in manual mode Adjust the battery to 5 8V Digital voltmeter PTT up M ONI down Adjust so that the LED flashes Note In manual mode channel selector 1 12 MIC can t connect line after adjust complete short SELF enter mode setting press PTT disabl...

Page 18: ...ttom of the case assembly 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 Removing the lever 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: ...19 Exploded View Packing ...

Page 20: ...20 ...

Page 21: ...io frequency on an AFVTVM and radio frequency on a RF VTVM at high impedance Set the MIC input to obtain a modulation factor of 60 with the transmit frequency at center and a modulation frequency of 1kHz ANT L112 C145 R224 5R L203 L214 1st Local 0 1Vrms IC200 C212 Q201 R210 SP Q307 IC302 VR IC300 116 5dBm 113dBm 98dBm 103dBm 104dBm 106 5dBm 103dBm 1018mVrms 175mVrms 23 5mVrms 0 63Vrms L208 RF cent...

Page 22: ...W Operating sensitivity 12 3mV Audio distortion 5 Modulation limiting 5kHz 2 5kHz 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 0 4 V 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 Selecti...

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