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Entel HX400 Series Service Manual

Vhf/uhf handheld transceiver
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  • Page 2: Table Of Contents

    HX400_Manual_V2 00.doc CONTENTS INTRODUCTION..........................5 1.1........................5 ODEL UMBERS ITEMS SUPPLIED ..........................5 2.1. ACCESSORIES ........................6 OPERATING THE RADIO ......................7 THEORY OF OPERATION......................7 4.1. THE MICROPROCESSOR ......................7 4.1.1. Microprocessor I/O Signals....................8 4.1.2. Switch Operation ......................9 4.1.3. Backlights .........................9 4.1.4. Microprocessor Clock and Beat Shift Function..............9 4.1.5.
  • Page 3 HX400_Manual_V2 00.doc DISASSEMBLY ..........................25 5.1...............25 TTACHING AND EMOVING THE ATTERY 5.2.......................25 ISASSEMBLING THE RADIO 5.3.......................26 EASSEMBLING THE RADIO 5.4..................26 ISUAL AND ECHANICAL NSPECTION TESTING AND PROGRAMMING SETUP..................28 SPECIFICATIONS ........................29 PARTS LISTS..........................30 8.1. PEC P ..............30 ONTROLLER AND ROCESSOR ARTS...
  • Page 4 HX400_Manual_V2 00.doc TABLES Table 2.1 Items Supplied........................5 Table 2.2 Accessories ..........................6 Table 4.1 Microprocessor Input Signals ....................8 Table 4.2 Microprocessor Output Signals ....................8 Page 4 of 80...

  • Page 5: Introduction

    HX400_Manual_V2 00.doc INTRODUCTION The Entel HX400 Series 2 is a PMR handheld two-way VHF/UHF/MB transceiver. It is of heavy duty, commercial grade construction exceeding MIL-STD 810/C/D/E/F, with up-rated IP55 splash proof protection. It is constructed with a microprocessor controlled, temperature compensated Phase Locked Loop (PLL) frequency synthesizer.

  • Page 6: Accessories

    HX400_Manual_V2 00.doc 2.1. ACCESSORIES The HX400 Series is supported by a wide range of useful accessories. For an up to date list visit the Entel web site at www.entel.co.uk CSAHX 1-way dual slot rapid charger, 110/230v operation CSBHX 6-way dual slot rapid charger, 110/230v operation CFC450 Soft leather carry case with strap &...

  • Page 7: Operating The Radio

    IC5 (uPD78F microprocessor) and IC4 (a 1Mbit-SPI-Bus Serial EEPROM) work together holding all the information that is needed to program any of HX400 series models. Shared between the internal memory in IC5 and the external serial EEPROM is all the data needed to make the radio function, including dealer programmed data.

  • Page 8: Microprocessor I/O Signals

    HX400_Manual_V2 00.doc In the models with keypads, IC5 also reads the tactile keypad matrix formed by switches SW1 to SW25 as described below. The microprocessor outputs Beeps and warning tones on pins 48 and 49, these are summed into the receive and transmit audio paths via an attenuator and summing network. R50 R51 R10 R41 C11 C6 C7 C22 4.1.1.

  • Page 9: Switch Operation

    HX400_Manual_V2 00.doc 4.1.2. Switch Operation Mechanical SPST switches SW1, SW2 & SW4 on the RF Board, tactile switches on the Controller Board, and the Keypad (where fitted), are arranged in a matrix form. Signals BUT_IN_0 to 4 are sent in a sequence. Once a switch is activated (depressed) the microprocessor determines which one according to the “cross-point”...

  • Page 10: Discrete Control Signals

    HX400_Manual_V2 00.doc 4.1.6. Discrete Control Signals Other signals are generated by IC9 (M62364) under microprocessor control. These signals are: • TX_PWR Transmit Power Level • RX_FIL Tuning voltage for the front end filters • FREQ_CON VCXO fine tuning A fixed DC voltage is applied to pins 1, 4 & 9 of IC9. According to the data sent by the microprocessor to IC9, via the serial data link, the dc voltage at the corresponding output pins 5, 2 &...

  • Page 11: Audio And Tone Signalling Circuits

    HX400_Manual_V2 00.doc 4.2. AUDIO AND TONE SIGNALLING CIRCUITS The majority of the functionality concerned with Audio and Signalling is accomplished within the CMX7041Audio Processor (IC3). Some external op-amps also provide buffering and filtering. The CMX7041 performs simultaneous processing of sub-audio and in-band signalling and audio- band processing (including frequency inversion scrambling, companding and pre- or de- emphasis).

  • Page 12: Received Tone Processing

    HX400_Manual_V2 00.doc The balanced audio output of U1 (bridge connection of both amplifiers) for the external speaker is taken from pin3 (OUT1+) and pin 18 (OUT1-). Muting of this signal is achieved by transistor Q5. The MUTE digital signal from the Microprocessor silences the audio from the external speaker.

  • Page 13: Transmit Tone Processing

    HX400_Manual_V2 00.doc The whole VOX detector circuit is enabled by Q21 under control of the microprocessor signal VOX_EN. IC102 Q21 C1 C99 C100 C65 C103 C101 C130 D222 R78 R79 R80 R75 R76 R82 R157 4.2.4. Transmit Tone Processing IC3 contains the circuits necessary to generate the sub-tones or DSC data (CTCSS or DCS). The microprocessor controls IC3, via the serial data link, to produce the programmed sub-tone or data stream.

  • Page 14: Synthesizer Section

    HX400_Manual_V2 00.doc 4.3. SYNTHESIZER SECTION The synthesizer section comprises a MB15E03SL synthesiser IC, a reference oscillator (VCXO), a loop filter, a Transmit VCO, a Receive LO, the supply switching to enable either of the VCO’s, and a common output buffer amplifier. The Synthesiser IC and VCXO run from a 3V supply derived from the +5V supply by R262 and D29.

  • Page 15: Voltage Doubler

    HX400_Manual_V2 00.doc The VCXO is also modulated by low frequency Tone signals. These are buffered in IC8b and then summed together with the fine tuning signal FREQ_CON in IC8a. The resulting signal is applied to the VCON input of the VCXO. VCXO IC8 C74 C100 C73 C170 C67 C145 R54 R39 R40 R85 R48 R184 R221 R206 R128 R212R213 4.3.2.

  • Page 16: Vco Power Switching And Buffering

    HX400_Manual_V2 00.doc The variable capacitance of these diodes tunes the oscillator to the correct frequency as determined by the synthesizer. The VCO control voltage from the synthesizer (VCO_TUNE) is applied to the varicap diode network D4, D26 & D32 (D501 _MB). VHF-UHF Q26 D4 D26 D32 C249 C21 C87 C23 C248 C24 C34 TC3 R22 L24 L4 L41 L5...

  • Page 17: Receiver Section

    HX400_Manual_V2 00.doc 4.4. RECEIVER SECTION The receiver is a dual conversion super-heterodyne design with a first intermediate frequency (IF) of 46.35MHz and a second IF frequency of 450 kHz. The receiver consists of a First RF Filter, a RF amplifier, a second RF Filter, a first mixer, first IF Filter, an IF amplifier, and an FM IF IC with associated 2 IF ceramic filter and discriminator.

  • Page 18: Second Rf Filter

    HX400_Manual_V2 00.doc 4.4.4. Second RF Filter The next stage is the second RF Bandpass Filter, which also has a pass band characteristic, tuned by the voltage on the RX_FIL line. VHF units D11 D10 C75 C29 C266 C56 C72 L13 L18 R140 R1 UHF units D11 D10 C56 C51 C43C143 L35 L18 L6 R140 R139 66-88MHz...

  • Page 19: Second If Circuit (Fm If Ic)

    HX400_Manual_V2 00.doc 4.4.9. Second IF Circuit (FM IF IC) The next stages are contained mostly within the FM IF IC, IC1. Second IF Mixer The second IF mixer is where the first IF (46.35 MHz) and second LO (45.9MHz from the RX Second LO Tripler) are mixed to produce a 450 kHz second IF signal.
  • Page 20 HX400_Manual_V2 00.doc The noise around 16 kHz is band-pass filtered by L14, C125, C111, C167, L30 and amplified in IC1 (pins 8 & 7) and then by transistor Q2. The noise is full-wave rectified by D14 & D22 and the proportional DC signal is routed via R90 to the Controller Board (SQL), where the mute (squelch) decision is taken.

  • Page 21: Transmitter Section

    HX400_Manual_V2 00.doc 4.5. TRANSMITTER SECTION The transmit output is formed by taking the output of the TX VCO and amplifying it to the required level. The TX_VCO has already had the required modulation applied to it in the Synthesiser. 4.5.1. Low Power Transmit Amplifier The modulated transmit signal is applied to the buffer amplifier based around Q7.

  • Page 22: Pa Switching Circuit

    HX400_Manual_V2 00.doc even in the event of an open/short antenna the final stage is fully protected and the current drain from the battery is limited to about 2-3 Amperes. IC9a IC9b R34R38R59 R94 R98 R137R96 R166 R4 R97 R16 C189 C190 C70 C133 C134 C122 C9 4.5.4.

  • Page 23: Power Supply

    HX400_Manual_V2 00.doc 4.6. POWER SUPPLY 4.6.1. Battery connections and Protection circuit 7.2V DC is supplied to the transceiver through the battery terminals CN2. D5 acts as a reverse power connection protection device. The main feed to the Transmit Driver and Final PA stages is via BAT+.

  • Page 24: Volume Control

    VOL1 R 50 R52 R55 4.7.4. Battery Monitoring The battery for the HX400 series 2 radios contains an IC that monitors the number of charge cycles that the battery has been exposed to. This information is sent to the microprocessor via CN2 pin 2, the BAT_COM line, CON2 pin 33 via R3 and R4.

  • Page 25: Disassembly

    HX400_Manual_V2 00.doc DISASSEMBLY Note: Be sure to switch off the transceiver's power before disassembling it. 5.1. Attaching and Removing the Battery Pack Instructions for attaching and removing the Battery pack are given in the Operators Manual. 5.2. Disassembling the radio Please, refer to Figure 5.1 Exploded View.

  • Page 26: Reassembling The Radio

    HX400_Manual_V2 00.doc IF THE RF-PCB NEEDS TO BE REMOVED FOR REPLACING PARTS THEN: 6. Using solder wick, unsolder the centre pin of the Antenna Connector C4 7. Using long nose pliers unscrew nuts C2 8. Remove the 10 Philips screws, S1, holding the PCB to the Main Frame. Gently remove the board.
  • Page 27 HX400_Manual_V2 00.doc Operate the Volume Control Knob and the Channel Selector Switch and ensure that the fixing nuts are tight. Check that the antenna connector is not loose. Check that the four battery contact springs move smoothly and are not corroded. IMPORTANT NOTE.

  • Page 28: Testing And Programming Setup

    HX400_Manual_V2 00.doc 6. TESTING AND PROGRAMMING SETUP. Following is a suggested arrangement for testing and programming of a HX400 radio. Figure 6.1 Test & Programming Setup Page 28 of 80...

  • Page 29: Specifications

    HX400_Manual_V2 00.doc SPECIFICATIONS General Specifications Channel Capacity 16 (HX4x2) or 255 (HX4x3/5/6) Power Supply Lithium-ion 7.4v 1800mAH Battery Dimensions H x W x D (mm) [Height 100mm(h) x 62.5mm(w) x 39.5mm(d) excluding knobs]: Weight : 275g (with battery and antenna) Environmental Rating IP55 &...

  • Page 30: Parts Lists

    HX400_Manual_V2 00.doc PARTS LISTS 8.1. Controller and Processor PEC Parts List Capacitors Capacitors Entel P/N Description Entel P/N Value Description 30101044600 0.1u Ceramic C161 30101051600 Ceramic 30101051600 Ceramic C165 30101044600 0.1u Ceramic 31102266310 22u 10V Tantalum C168 20100002100 SMD. 0603...
  • Page 31 HX400_Manual_V2 00.doc Capacitors Capacitors Entel P/N Description Entel P/N Value Description C136 30102005600 Ceramic C137 30102005600 Ceramic C138 31004757200 4.7u 10V Tantalum C139 30101015600 100p Ceramic C148 30101044600 0.1u Ceramic C149 30101036600 0.01u Ceramic Inductors Miscellaneous Entel P/N Value Description...
  • Page 32 HX400_Manual_V2 00.doc Resistors Resistors Entel P/N Value Description Entel P/N Value Description 20104732100 SMD. 0603 20103332100 SMD. 0603 20101012100 SMD. 0603 20101042100 100k SMD. 0603 20104732100 SMD. 0603 20101032100 SMD. 0603 20101012100 SMD. 0603 20101032100 SMD. 0603 00000000000 Not Fitted...
  • Page 33 HX400_Manual_V2 00.doc Resistors Resistors Entel P/N Value Description Entel P/N Value Description 00000000000 Not Fitted R270 20104732100 SMD. 0603 20104732100 SMD. 0603 Semiconductors Semiconductors Entel P/N Value Description Entel P/N Value Description 501KDZ56700 KDZ5.6V Zener 5.6V 520C4040400 KRC404 Transistor 500DS122400...

  • Page 34: Xvhf Models

    HX400_Manual_V2 00.doc 8.2. RF PEC Parts List - HX42x VHF models Capacitors Capacitors Entel P/N Value Description Entel P/N Value Description 00000000000 Not Fitted 30101015600 100p Ceramic 30101036600 0.01u Ceramic 30104716600 470p Ceramic 31102266310 22u 16V Tantalum 30101015600 100p Ceramic 30101036600 0.01u...
  • Page 35 HX400_Manual_V2 00.doc Capacitors Capacitors Entel P/N Value Description Entel P/N Value Description 00000000000 Not Fitted C153 30101044600 0.1u Ceramic 30103005600 Ceramic C154 30204758300 4.7u Ceramic 30101015600 100p Ceramic C155 30104716600 470p Ceramic 30101036600 0.01u Ceramic C156 30104716600 470p Ceramic 30204758300 4.7u...
  • Page 36 HX400_Manual_V2 00.doc Capacitors Capacitors Entel P/N Value Description Entel P/N Value Description C617 30101015600 100p Ceramic C774 30108205600 Ceramic Inductors Miscellaneous Entel P/N Value Description Entel P/N Value Description 42028170900 coil.smd Inductor 550C450E90 450kHz_25k Ceramic Filter 41102211000 220n Inductor 550C450G90 450kHz_12.5...
  • Page 37 HX400_Manual_V2 00.doc Resistors Resistors Entel P/N Value Description Entel P/N Value Description 20101042100 100k SMD. 0603 20104732100 SMD. 0603 20101012100 SMD. 0603 20101042100 100k SMD. 0603 20102232100 SMD. 0603 20104742100 470k SMD. 0603 20101042100 100k SMD. 0603 20102222100 2.2k SMD. 0603 20101032100 SMD.
  • Page 38 HX400_Manual_V2 00.doc Resistors Resistors Entel P/N Value Description Entel P/N Value Description R218 20104732100 SMD. 0603 R219 41101022020 Inductor R221 20101032100 SMD. 0603 R242 20102232100 SMD. 0603 R243 20102232100 SMD. 0603 R244 20102232100 SMD. 0603 R245 20101022100 SMD. 0603 R246...
  • Page 39 HX400_Manual_V2 00.doc Semiconductors Semiconductors Entel P/N Value Description Entel P/N Value Description dual(R/G) 501HZK2A900 HZK2ALL Zener 00000000000 Not Fitted 500DS120400 KDS120 Diode Dual 00000000000 Not Fitted 00000000000 Not Fitted 521C4226400 2SC4226 Transistor D709 50428170900 HSMS-2817 Diode Ring 520A3050400 KRA305 Transistor...

  • Page 40: Xuhf Models

    HX400_Manual_V2 00.doc 8.3. RF PEC Parts List - HX48x UHF models Capacitors Capacitors Entel P/N Value Description Entel P/N Value Description 30101036600 0.01u Ceramic 30101015600 100p Ceramic 30100602600 Ceramic 30104716600 470p Ceramic 30101036600 0.01u Ceramic 30101015600 100p Ceramic 30104716600 470p...
  • Page 41 HX400_Manual_V2 00.doc Capacitors Capacitors Entel P/N Value Description Entel P/N Value Description 30101015600 100p Ceramic C152 30101051600 Ceramic 30101036600 0.01u Ceramic C153 30101051600 Ceramic 30204758300 4.7u Ceramic C154 30204758300 4.7u Ceramic C155 30104716600 470p Ceramic C156 30104716600 470p Ceramic Trimmers...
  • Page 42 HX400_Manual_V2 00.doc Capacitors Capacitors Entel P/N Value Description Entel P/N Value Description C617 30101015600 100p Ceramic C774 30108205600 Ceramic Inductors Miscellaneous Entel P/N Value Description Entel P/N Value Description 41101011000 100n Inductor 550C450E900 450kHz 25k Ceramic Filter 41102201000 Inductor 550C450G900 450kHz 12.5k...
  • Page 43 HX400_Manual_V2 00.doc Resistors Resistors Entel P/N Value Description Entel P/N Value Description 20102212100 SMD. 0603 20104722100 4.7k SMD. 0603 20102212100 SMD. 0603 20106830100 68k 1% SMD. 0603 20101542100 150k SMD. 0603 R101 20103332100 SMD. 0603 20103322100 3.3k SMD. 0603 R102 20103302100 SMD.
  • Page 44 HX400_Manual_V2 00.doc Resistors Resistors Entel P/N Value Description Entel P/N Value Description R248 20104722100 4.7k SMD. 0603 R249 20101012100 SMD. 0603 R251 20106840100 680k SMD. 0603 R253 20104712100 SMD. 0603 R262 20101002100 SMD. 0603 R613 20101222100 1.2k SMD. 0603 R614 20101222100 1.2k...

  • Page 45: Rf Pec Parts List - Hx41 X 66-88Mhz Models

    HX400_Manual_V2 00.doc Semiconductors Semiconductors Entel P/N Value Description Entel P/N Value Description 520A3050400 KRA305 Transistor PNP 520C4075400 KTC4075 Transistor NPN 521C4226400 2SC4226 Transistor NPN 520C4215400 2SC4215 Transistor NPN 520A3050400 KRA305 Transistor PNP 53631136200 TA31136FN FM IF System 53771754000 TK71750S +5V Fixed...
  • Page 46 HX400_Manual_V2 00.doc Capacitors Capacitors Entel P/N Value Description Entel P/N Value Description 30101805600 Ceramic 30101044600 0.1u Ceramic 30101036600 0.01u Ceramic 30204758300 4.7u Ceramic 00000000000 Not Fitted 30104716600 470p Ceramic 00000000000 Not Fitted 30101044600 0.1u Ceramic 00000000000 Not Fitted 30101036600 0.01u...
  • Page 47 HX400_Manual_V2 00.doc Capacitors Capacitors Entel P/N Value Description Entel P/N Value Description C246 30101805600 Ceramic C737 30103316600 330p Ceramic C247 30102236600 0.022u Ceramic C252 30101036600 0.01u Ceramic C746 30101036600 0.01u Ceramic C253 30104705600 Ceramic C748 30104705600 Ceramic C255 30101505600 Ceramic...
  • Page 48 HX400_Manual_V2 00.doc Inductors Miscellaneous Entel P/N Value Description Entel P/N Value Description 431451Y4000 451Y Ferrite 42028170900 coil Inductor 41102211000 220n Inductor 41102711000 270n Inductor 41205612000 560n Inductor 41205612000 560n Inductor L502 20100002100 SMD. 0603 L503 20102212100 220R SMD. 0603 L507...
  • Page 49 HX400_Manual_V2 00.doc Resistors Resistors Entel P/N Value Description Entel P/N Value Description 20101022100 SMD. 0603 R168 20105622100 5.6k SMD. 0603 20102232100 SMD. 0603 R170 20101042100 100k SMD. 0603 20101042100 100k SMD. 0603 R171 20101042100 100k SMD. 0603 20500R10400 0.1 1/2w SMD.
  • Page 50 20101032100 SMD. 0603 R119 20101042100 100k SMD. 0603 R120 20101042100 100k SMD. 0603 R122 20104732100 SMD. 0603 Semiconductors Semiconductors Entel P/N Value Description Entel P/N Value Description 500DS160700 KDS160 Diode Switch 520C4040400 KRC404 Transistor NPN 60030101300 KBPA3010 LED dual(R/G) 500C4080400...
  • Page 51 HX400_Manual_V2 00.doc Semiconductors Semiconductors Entel P/N Value Description Entel P/N Value Description 53631136200 TA31136FN FM IF System 520A3050400 KRA305 Transistor PNP 53771754000 TK71750S +5V Fixed Q501 521C4226400 2SC4226 Transistor NPN Regulator 53875W01400 TA75W01F Op Amp Dual Q502 521C4226400 2SC4226 Transistor NPN...

  • Page 52: Odels

    HX400_Manual_V2 00.doc 8.5. Mechanical Parts List – HX4x2 Models Page 52 of 80...

  • Page 53: Odels

    HX400_Manual_V2 00.doc 8.6. Mechanical Parts List – HX4x3 Models Page 53 of 80...
  • Page 54 HX400_Manual_V2 00.doc 8.7. Mechanical Parts List – HX4x5 Models Page 54 of 80...
  • Page 55 HX400_Manual_V2 00.doc 8.8. Mechanical Parts List – HX4x6 Models Page 55 of 80...

  • Page 56: Circuit Diagrams

    HX400_Manual_V2 00.doc CIRCUIT DIAGRAMS The following circuit diagrams for the HX400 Series 2 radios are included below: Figure 9.2 Controller and Processor PEC Circuit Diagram Sheet 1 – All Models Figure 9.2 Controller and Processor PEC Circuit Diagram Sheet 2 – All Models Figure 9.2 Controller and Processor PEC Circuit Diagram Sheet 3 –...
  • Page 57 BEAT_SHIFT IC4_25LC1024 RESET BAT_COM DA_LE R210 FLDMO 7041_RDATA HOLD BACK_LIGTH VOL2 SCLK IC_CLK AUDIO_IN IC_DATA ENTEL HX400 Radios Series 2.0 MOD_AUDIO Title: Contoller & Audio Processor Board Project: HX400_2.0 File: CNTRL01.chm Page: R207 Number: 400.02.CN01 Date: Sep. 29, 2008 Rev. :...
  • Page 58 VOUT7 VOL1 VOUT8 DA_LE VOL2 IC_CLK RESET RESET VDAREF IC_DATA DA_LE TONE_AUDIO FLDMO R269 ENTEL HX400 Radios Series 2.0 Title: Contoller & Audio Processor Board Project: HX400_2.0 File: CNTRL02.chm Page: Number: 400.02.CN02 Date: Sep. 29, 2008 Rev. : Page 58 of 80...
  • Page 59 FLDMO (TONES) IN_MIC C204 C139 C135 C174 C187 MIC_EN C105 C106 C102 C104 R116 ENTEL HX400 Radios Series 2.0 Title: Contoller & Audio Processor Board Project: HX400_2.0 File: CNTRL03.chm Page: Number: 400.02.CN03 Date: Sep. 30, 2008 Rev. : Page 59 of 80...
  • Page 60 BAT+ C142 C177 SW_BAT VOL1 RX_LED +R5V 2PIN1 ENCODER1 +R5V ENCODER2 ENCODER0 ENCODER ENCODER3 BAT_COM ENTEL HX400 Radios Series 2.0 TX_LED Title: RF Block Diagram Project: File: RFBLK01.chm Page: HX400_2.0 Number: 400.02.BLK1 Date: Sep. 27, 2008 Rev. : Page 60 of 80...
  • Page 61 IC_DATA 3.3K TXB+ IC_CLK RX_EN 470P R159 RXB+ C128 VCO_CON 10U/10V C117 RTX5V VCOB+ ENTEL HX400 Radios Series 2.0 Title: Syntesizer & R/T Power Switch Project: HX400_2.0 File: VHFSYN01.chm Page: Number: 400.02.VH01 Date: Sep. 20, 2008 Rev. : Page 61 of 80...
  • Page 62 VCO_TUNE C159 100K C252 R246 C188 R174 220R C164 100R RXB+ R167 MOD_OUT1 100R ENTEL HX400 Radios Series 2.0 Title: RX/TX VCOs & Buffers Project: HX400_2.0 File: VHFVCO01.chm Page: Number: 400.02.VH02 Date: Sep. 18, 2008 Rev. : Page 62 of 80...
  • Page 63 0.1U C264 R210 C260 C277 C110 C116 330P 1000P 1000P 4.7U R102 R110 R104 2.2K ENTEL HX400 Radios Series 2.0 Title: Receiver VHF Project: HX400_2.0 File: VHFREC01.chm Page: Number: 400.02.VH03 Date: Sep. 23, 2008 Rev. : Page 63 of 80...
  • Page 64 0.1U 100P 100K 10U/10V 2.2M C189 C190 R137 C133 0.1U 4.7U 0.1U TX_PWR ENTEL HX400 Radios Series 2.0 Title: TX Power Amplifier, power control & Antenna Switch Project: HX400_2.0 File: VHFTRM01.chm Page: Number: 400.02.VH04 Date: Sep. 21, 2008 Rev. :...
  • Page 65 IC_DATA 3.3K TXB+ IC_CLK RX_EN 470P R159 RXB+ C128 VCO_CON 10U/10V C117 RTX5V VCOB+ ENTEL HX400 Radios Series 2.0 Title: Syntesizer & R/T Power Switch Project: HX400_2.0 File: UHFSYN01.chm Page: Number: 400.02.UH01 Date: Sep. 20, 2008 Rev. : Page 65 of 80...
  • Page 66 C159 C252 R246 0.01U C188 R174 220R C164 100R 470P RXB+ R167 MOD_OUT1 100R ENTEL HX400 Radios Series 2.0 Title: RX/TX VCOs & Buffers Project: HX400_2.0 File: UHFVCO01.chm Page: Number: 400.02.UH02 Date: Oct.10 , 2008 Rev. : Page 66 of 80...
  • Page 67 R210 C260 C277 C110 C116 330P 1000P 1000P 4.7U R102 R110 4.7K R104 4.7K 1.5K ENTEL HX400 Radios Series 2.0 Title: Receiver UHF Project: HX400_2.0 File: UHFREC01.chm Page: Number: 400.02.UH03 Date: Sep. 23, 2008 Rev. : Page 67 of 80...
  • Page 68 TXB+ 470P 100K 10U/10V 2.2M C189 C190 R137 C133 0.1U 4.7U 0.1U TX_PWR ENTEL HX400 Radios Series 2.0 Title: TX Power Amplifier, power control & Antenna Switch Project: HX400_2.0 File: UHFTRM01.chm Page: Number: 400.02.UH04 Date: Oct. 10, 2008 Rev. :...
  • Page 69 TX_EN IC_DATA 3.3K TXB+ IC_CLK RX_EN R159 RXB+ C128 10U/10V VCO_CON C117 RTX5V VCOB+ ENTEL HX400 Land Radios series 2.0 Title: Syntesizer & R/T Power Switch Project: HX400_2.0 File: MBSYN01.chm Page: Number: 400.02.MB01 Date: Nov 9, 2008 Rev. : Page 69 of 80...
  • Page 70 C529 470P 1.5P RXB+ R502 L511 R167 100R D503 220R R522 R523 R505 MOD_OUT1 ENTEL HX400 Land Radios Series 2.0 Title: RX/TX VCOs & Buffers Project: HX400_2.0 File: MBVCO01.chm Page: Number: 400.02.MB02 Date: Nov 8, 2008 Rev. : Page 70 of 80...
  • Page 71 0.1U C264 R210 C260 C277 C110 C116 330P 1000P 1000P 4.7U R102 R110 R104 2.2K ENTEL HX400 Land Radios Series 2.0 Title: Receiver Project: HX400_2.0 File: MBREC01.chm Page: Number: 400.02.MB03 Date: Nov 9, 2008 Rev. : Page 71 of 80...
  • Page 72 470P C134 100K 10U/10V 0.1U TXB+ 2.2M C190 C189 R137 0.1U 4.7U TX_PWR ENTEL HX400 Land Radios Series 2.0 Title: TX Power Amplifier, power control & Antenna Switch Project: HX400_2.0 File: MBTRM01.chm Page: Number: 400.02.MB04 Date: Nov 8, 2008 Rev. :...
  • Page 73 HX400_Manual_V2 00.doc Figure 9.17 HX42x RF Board, TOP VIEW Page 73 of 80...
  • Page 74 HX400_Manual_V2 00.doc Figure 9.18 HX42x RF Board, BOTTOM VIEW Page 74 of 80...
  • Page 75 HX400_Manual_V2 00.doc Figure 9.19 HX48x RF Board, TOP VIEW Page 75 of 80...
  • Page 76 HX400_Manual_V2 00.doc Figure 9.20 HX48x RF Board, BOTTOM VIEW Page 76 of 80...
  • Page 77 HX400_Manual_V2 00.doc Figure 9.21 HX41x RF Board, TOP VIEW Page 77 of 80...
  • Page 78 HX400_Manual_V2 00.doc Figure 9.22 HX41x RF Board, BOTTOM VIEW Page 78 of 80...
  • Page 79 HX400_Manual_V2 00.doc Figure 9.23 HX4Xx Control Board, TOP VIEW Page 79 of 80...

  • Page 80: Figure 9.24 Hx4Xx Control Board, Bottom View

    HX400_Manual_V2 00.doc Figure 9.24 HX4Xx Control Board, BOTTOM VIEW Page 80 of 80...

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