RTS DV 2400 Series Скачать руководство пользователя страница 12

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DV-2400

PARTS LIST

Ref. No

Parts No.

Description of item

Size (LxW)(mm)

Qty

Specification

LIGHTED

DIODE

5*2

POWER(YELLOW)

LIGHTED

DIODE

5*2

RX(GREEN)

SMT

DIODE

0603 1

1SS400

SMT

DIODE

SC70 1

1SS372

SMT

DIODE

0603 1

HSC277

SMT LIGHTED DIODE

0603

YELLOW

LIGHTED

DIODE

5*2

TX(RED)

D10-D13

SMT

DIODE

SOT-323

DA221

D14-D15

SMT LIGHTED DIODE

0603

YELLOW

D16

SMT ZENER DIODE

0603

5.6V

DS1

LCD

MOD

LCD

SMT DIGITAL TRANSISTOR

EMT3

NO USE

SMT DIGITAL TRANSISTOR

EMT3

DTC114EE

SMT DIGITAL TRANSISTOR

EMT3

DTC144EE

SMT DIGITAL TRANSISTOR

EMT3

DTC114EE

Q5-Q6

SMT

TRANSISTOR

SOT-23

2SC1623

TRANSISTOR

SOT-89 1

2SD1664

SMT DIGITAL TRANSISTOR

EMT3

DTC144TE

SMT

TO-92 1

CE6275A50

SMT

LQFP64

R8C/2A-2B

SMT IC

SOT-23

NO USE

SMT

SOP-8 1

AT24C128RM(8)

U2008

SMT

SOT-25-5 1

TA75S01F

L1-L3

SMT FERRITE BEAD (BLACK)

0805

271T

SMT FERRITE BEAD (BLACK)

0603

271T

FLAT CABLE CONNECTOR

SSOI32F

0.5S-1S-32PWB

HAND MIC INTERFACE (Erection type)

RJ45

ENCODERS

SWITCH

PED09712M-FB18A9.5

CRYSTAL

49S

19.200MHz

Содержание DV 2400 Series

Страница 1: ...SERVICE MANUAL CIRCUIT DESCRIPTION 1 PC BOARD 30 SPECIFICATIONS 39 CONTENTS 2016 Jan PARTS LIST 8 ADJUSTMENT 28 BLOCK DIAGRAM 38 SCHEMATIC DIAGRAM 34 ...

Страница 2: ... shown in Fig 1 Front end RF amplifier An incoming signal from the antenna is applied to an RF amplifier Q206 after passing through a transmit receive switch circuit D213 are off and a band pass filter L207 L208 L211 and varactor diodes D207 D208 After the signal is amplified Q206 the signal is filtered through a band pass filter L205 L206 and varactor diodes D205 D206 to eliminate unwanted signal...

Страница 3: ...is high the ceramic filter SW diodes D200 D201 cause CF201 to turn on to receive a Wide signal When the Narrow port is low the ceramic filter SW diodes D200 D201 cause CF200 to turn on to receive a Narrow signal See Fig 3 IF_IN U200 IF SYSTEM MIX_O D201 D200 CF200 NARROW CF201 WIDE R227 R228 SW SW Q203 Q201 WIDE NARROW SW U2 35pin R229 R230 Fig 3 Wide Narrow Switching Circuit AF Signal System The ...

Страница 4: ...l is compared in phase with the 5 or 6 25kHz reference signal in the phase comparator in U205 The output signal from the phase comparator is filtered through a low pass filter and passed to the VCO to control the oscillator frequency See Fig 6 VCO The operating frequency is generated by Q217 in transmit mode and Q216 in receive mode The oscillator frequency is controlled by applying the VCO contro...

Страница 5: ...plifier Q215 through a low pass filter The low pass filter removes unwanted high frequency harmonic components and the resulting signal is transmitted through the antenna terminal See Fig 8 D A U505 M62364F CONVERTER U504 COMPANDER AMP Q5 2SC1623 U500 U504 MIC IDC U504 SPLATTER FILTER U505 VCO Q217 2SK1875 NJM2902 MC33111 NJM2902 NJM2902 D A M62364F CONVERTER BUFFER Q210 2SC4226 RFAMP Q207 Q208 2S...

Страница 6: ...rols the D A converter U505 and adjusts the volume modulation and transmission power CK D A DT LD LE U505 converter U205 PLL U2 CPU Fig 10 Control circuit Memory Circuit The transceiver has an 128k bit EEPROM U6 The EEPROM contains adjustment data The CPU U2 controls the EEPROM through two serial data lines See Fig 11 U6 EEPROM U2 CPU Fig 11 APC Circuit Display Circuit The CPU U2 controls the disp...

Страница 7: ...evels Signal of DCS CTCSS port is summed with MOD and the resulting signal goes to the VCO This signal is applied to a varicap diode in the VCO for direct FM modulation See Fig 13 Fig 13 Encode circuit Decode DCS CTCSS DTMF 2T 5T The signal from AFWN entering into AF signal and higher audio frequencies output by pin 1 of U501 A are cut by low pass filter U503 then led to pin 51 of CPU The input si...

Страница 8: ...CPU port 45 P32 goes low then CPU port 23 P20 goes high Q103 turns on SBE SW Q100 turns on and power SBE is supplied to the radio When the DC power supplied to the radio the voltage regulator IC U1 supply into the CPU VDD During receiving the CPU port 19 P24 output H level Q101 and Q108 turn on and reception circuit is supplied by 8V power supply 8R During transmitting CPU port 18 P25 output H lev...

Страница 9: ...MT CAPACITOR 0603 1 102 10 50V C29 SMT ZENER DIODE 0603 1 5 6V C30 SMT CAPACITOR 0603 1 103 10 50V C31 SMT CAPACITOR 0603 1 NO USE C32 SMT CAPACITOR 0603 1 105 10 50V C33 C34 SMT CAPACITOR 0603 2 473 10 50V C35 C36 SMT CAPACITOR 0603 2 273 10 50V C37 SMT CAPACITOR 0603 1 225 10 50V C38 SMT CAPACITOR 0603 1 103 10 50V C39 SMT CAPACITOR 0603 1 102 10 50V C40 SMT CAPACITOR 0603 1 22P 5 50V C41 SMT CA...

Страница 10: ...3 SMT RESISTOR 0603 1 NO USE R4 R7 SMT RESISTOR 0603 3 1K 5 R8 SMT RESISTOR 0603 1 10K 5 R9 R10 SMT RESISTOR 0603 2 1K 5 R11 SMT RESISTOR 0603 1 10K 5 R12 SMT RESISTOR 0603 1 1K 5 R13 SMT RESISTOR 0603 1 100R 5 R14 R16 SMT RESISTOR 0603 3 1K 5 R17 SMT RESISTOR 0603 1 33K 5 R18 R19 SMT RESISTOR 0603 2 10K 5 R20 SMT RESISTOR 0603 1 1K 5 R21 SMT RESISTOR 0603 1 47K 5 R22 SMT RESISTOR 0603 1 33K 5 R23...

Страница 11: ...RESISTOR 0603 1 10R 5 R54 SMT RESISTOR 0603 1 100R 5 R55 SMT RESISTOR 0603 1 470R 5 R56 SMT RESISTOR 0603 1 4 7K 5 R57 SMT RESISTOR 0603 1 2 2K 5 R58 SMT RESISTOR 0603 1 4 7K 5 R59 SMT RESISTOR 0603 1 470K 5 R60 SMT RESISTOR 0603 1 22K 5 R61 SMT RESISTOR 0603 1 56K 5 R62 SMT RESISTOR 0603 1 33K 5 R63 R64 SMT RESISTOR 0603 2 56R 5 R65 SMT RESISTOR 0603 1 100R 5 R66 SMT RESISTOR 0603 1 10K 5 R67 SMT...

Страница 12: ...RANSISTOR EMT3 1 NO USE Q2 SMT DIGITAL TRANSISTOR EMT3 1 DTC114EE Q3 SMT DIGITAL TRANSISTOR EMT3 1 DTC144EE Q4 SMT DIGITAL TRANSISTOR EMT3 1 DTC114EE Q5 Q6 SMT TRANSISTOR SOT 23 2 2SC1623 Q7 TRANSISTOR SOT 89 1 2SD1664 Q8 SMT DIGITAL TRANSISTOR EMT3 1 DTC144TE U1 SMT IC TO 92 1 CE6275A50 U2 SMT IC LQFP64 1 R8C 2A 2B U5 SMT IC SOT 23 1 NO USE U6 SMT IC SOP 8 1 AT24C128RM 8 U2008 SMT IC SOT 25 5 1 T...

Страница 13: ...4P 5 50V C204 C216 SMT CAPACITOR 0603 13 103 10 50V C217 SMT CAPACITOR 0603 1 NO USE C218 C225 SMT CAPACITOR 0603 11 103 10 50V C226 SMT CAPACITOR 0603 1 27P 5 50V C227 SMT CAPACITOR 0603 1 NO USE C228 SMT SMALL FIXED INDUCTOR 0603 1 150NH C229 SMT CAPACITOR 0603 1 2P 0 1P 50V C230 SMT CAPACITOR 0603 1 30P 5 50V C231 SMT CAPACITOR 1210 1 33P 5 50V C232 SMT CAPACITOR 1210 1 39P 5 50V C233 C244 SMT ...

Страница 14: ... C286 SMT CAPACITOR 1210 1 6P 0 25P 50V C287 SMT CAPACITOR 1210 1 NOUSE C288 SMT CAPACITOR 0805 1 2P 0 1P 50V C289 SMT CAPACITOR 1210 1 NOUSE C290 SMT CAPACITOR 1210 1 1P 0 1P 50V C291 SMT CAPACITOR 1206 1 NO USE C292 SMT CAPACITOR 1210 1 NO USE C293 C295 SMT CAPACITOR 0805 3 NO USE C296 C297 SMT CAPACITOR 1206 2 NOUSE C298 SMT CAPACITOR 0603 1 2P 0 1P 50V C299 SMT CAPACITOR 0603 1 68P 5 50V C300 ...

Страница 15: ...50V C354 SMT CAPACITOR 1206 1 470P 10 50V C355 C361 SMT CAPACITOR 0603 7 470P 10 50V C362 C363 SMT CAPACITOR 0603 2 0 5P 0 1P 50V C364 SMT CAPACITOR 0603 1 2P 0 1P 50V C365 SMT CAPACITOR 0603 1 3 5P 0 1P 50V C366 SMT CAPACITOR 0603 1 470P 10 50V C367 C368 SMT CAPACITOR 0603 2 15P 5 50V C369 SMT CAPACITOR 0603 1 8P 0 25P 50V C370 SMT CAPACITOR 0603 1 6P 0 1P 50V C371 SMT CAPACITOR 0603 1 1 5P 0 1P ...

Страница 16: ...R 1210 1 27P 5 50V C394 SMT CAPACITOR 1210 1 NO USE C395 C396 SMT CAPACITOR 1210 2 4P 0 25P 50V C397 SMT CAPACITOR 1210 1 3P 0 25P 50V C398 SMT CAPACITOR 1210 1 1 5P 0 1P 50V C399 SMT CAPACITOR 0603 1 0 5P 0 1P 50V C400 SMT CAPACITOR 0603 1 1P 0 1P 50V C401 SMT CAPACITOR 1210 1 5P 0 25P 50V C402 C403 SMT CAPACITOR 0603 2 6P 0 1P 50V C404 SMT CAPACITOR 0603 1 3 6P 0 1P 50V C405 SMT CAPACITOR 0603 1...

Страница 17: ...50V C542 SMT CAPACITOR 0603 1 103 5 50V C543 C544 SMT CAPACITOR 0603 2 123 5 50V C545 C551 SMT CAPACITOR 0603 7 103 5 50V C552 SMT CAPACITOR 0603 1 123 10 50V C553 SMT CAPACITOR 0603 1 473 5 50V C554 SMT CAPACITOR 0603 1 272 5 50V C555 SMT CAPACITOR 0603 1 152 5 50V C556 SMT CAPACITOR 0603 1 102 5 50V C557 SMT CAPACITOR 0805 1 105 10 50V C558 SMT CAPACITOR 0603 1 332 5 50V C559 SMT CAPACITOR 0603 ...

Страница 18: ...UM CAPACITOR A type 3 10uF 20 10V E208 SMT TANTALUM CAPACITOR A type 1 0 22uF 20 35V E209 SMT TANTALUM CAPACITOR A type 1 4 7uF 20 16V E210 SMT TANTALUM CAPACITOR A type 1 0 22uF 20 35V E211 SMT CAPACITOR 1206 1 82P 5 50V E500 E509 SMT TANTALUM CAPACITOR A type 10 1uF 20 16V E510 E515 SMT TANTALUM CAPACITOR A type 6 10uF 20 10V E516 SMT TANTALUM CAPACITOR A type 1 4 7uF 20 6 3V E517 SMT TANTALUM C...

Страница 19: ... 0603 1 220K 5 R209 SMT RESISTOR 0603 1 NOUSE R210 SMT RESISTOR 0603 1 220K 5 R211 SMT RESISTOR 0603 1 1K 5 R212 R213 SMT RESISTOR 0603 2 NOUSE R214 R221 SMT RESISTOR 0603 8 1K 5 R222 R223 SMT RESISTOR 0603 2 15K 5 R224 SMT RESISTOR 0603 1 10K 5 R225 SMT RESISTOR 0603 1 3 3K 5 R226 R241 SMT RESISTOR 0603 16 10K 5 R242 SMT RESISTOR 0603 1 180K 5 R243 SMT RESISTOR 0603 1 820R 5 R244 SMT RESISTOR 060...

Страница 20: ... 0603 1 68R 5 R277 R278 SMT RESISTOR 0603 2 240K 5 R279 R281 SMT RESISTOR 0603 3 470K 5 R282 R283 SMT RESISTOR 0603 2 NO USE R284 SMT RESISTOR 0603 1 2 2K 5 R285 R287 SMT RESISTOR 0603 3 NO USE R288 SMT RESISTOR 0603 1 330R 5 R289 SMT RESISTOR 0603 1 150R 5 R290 SMT RESISTOR 0603 1 39K 5 R291 R298 SMT RESISTOR 0603 8 47K 5 R299 SMT RESISTOR 0603 1 27K 5 R300 R304 SMT RESISTOR 0603 5 0R R305 SMT RE...

Страница 21: ...MT RESISTOR 0603 2 4 7K 5 R333 SMT RESISTOR 0603 1 3 9K 5 R334 SMT RESISTOR 0603 1 4 7K 5 R335 SMT RESISTOR 0603 1 5 6K 5 R336 SMT RESISTOR 0805 1 22R 5 R337 SMT RESISTOR 0603 1 22R 5 R338 SMT RESISTOR 0603 1 51K 5 R339 SMT RESISTOR 0603 1 270R 5 R340 SMT RESISTOR 0603 1 270K 5 R341 SMT RESISTOR 0603 1 330R 5 R342 SMT RESISTOR 0603 1 3 9K 5 R343 SMT RESISTOR 0603 1 300K 5 R344 SMT RESISTOR 0603 1 ...

Страница 22: ...ESISTOR 0603 7 1K 5 R518 SMT RESISTOR 0603 1 10K 5 R519 SMT RESISTOR 0603 1 2 2K 5 R520 SMT RESISTOR 0603 1 1K 5 R521 SMT RESISTOR 0603 1 20K 5 R522 SMT RESISTOR 0603 1 22K 5 R523 SMT RESISTOR 0603 1 1 5K 5 R524 SMT RESISTOR 0603 1 100R 5 R525 SMT RESISTOR 0603 1 100K 5 R526 SMT RESISTOR 0603 1 180K 5 R527 R528 SMT RESISTOR 0603 2 100K 5 R529 SMT RESISTOR 0603 1 33K 5 R530 R539 SMT RESISTOR 0603 1...

Страница 23: ...STOR 0603 1 33K 5 R563 SMT RESISTOR 0603 1 470K 5 R564 SMT RESISTOR 0603 1 390K 5 R565 SMT RESISTOR 0603 1 33K 5 R566 SMT RESISTOR 0603 1 56K 5 R567 SMT RESISTOR 0603 1 120K 5 R568 SMT RESISTOR 0603 1 15K 5 R569 SMT RESISTOR 0603 1 12K 5 R570 SMT RESISTOR 0603 1 68K 5 R571 SMT RESISTOR 0603 1 25 5K 1 R572 SMT RESISTOR 0603 1 5 11K 1 R573 SMT RESISTOR 0603 1 634K 1 R574 SMT RESISTOR 0603 1 15 8K 1 ...

Страница 24: ...URGE ABSORBER 1 ZSA5A27 D200 D202 SMT DIODE SOT 416 3 DAN235E D203 D204 SMT RESISTOR 0805 2 0R D205 D209 SMT VARIABLE CAPACITANCE DIODE SC 79 5 HVC350 D210 SMT DIODE SOT523 123 1 DA221 D211 D212 SMT DIODE 0805 2 NOUSE D213 D214 DIODE DO 35 2 NOUSE D215 SMT DIODE 1210 1 JDP2S12CR D216 SMT DIODE 1210 1 NOUSE D217 SMT DIODE SOT523 123 1 NOUSE D218 D221 SMT VARIABLE CAPACITANCE DIODE 0805 4 JDV2S14E D...

Страница 25: ...ISTOR SC 88A 1 UMC4N Q107 SMT DUAL DIGITAL TRANSISTOR SC 88A 1 NOUSE Q108 SMT DIGITAL TRANSISTOR EMT3 1 DTC114EE Q200 SMT TRANSISTOR SC 70 1 2SC4215 Q201 Q202 SMT DUAL DIGITAL TRANSISTOR SC 88A 2 UMC4N Q203 SMT DIGITAL TRANSISTOR EMT3 1 DTA114YE Q204 SMT TRANSISTOR SC 70 1 2SC4215 Q205 Q206 SMT FET SOT 143 2 3SK318 Q207 Q208 SMT TRANSISTOR SC 70 2 2SC4226 Q209 SMT TRANSISTOR SC 70 1 NOUSE Q210 Q21...

Страница 26: ...T IC SSOP8 2 LM2904V U203 SMT IC TO 220 1 KIA278R0PI U204 SMT IC SOT 25 5 1 TJ5205SF 50 U205 SMT IC SSOP20 1 LMX1511TM U500 SMT IC SOP16 1 MC33111 U501 U504 SMT IC SSOP14 4 NJM2902 U505 SMT IC SSOP24 1 M62364F U506 SMT IC SIP10F 1 LA4600 U800 SMT IC SSOP16 1 NO USE L200 L201 SMT SMALL FIXED INDUCTOR 0603 2 560NH L202 SMT SMALL FIXED INDUCTOR 0603 1 22NH L203 SMT WIRE WOUND INDUCTOR 0805 1 470NH L2...

Страница 27: ...R CORE COIL 1 2 5T L230 SMT SMALL FIXED INDUCTOR 0603 1 NOUSE L231 SMT SMALL FIXED INDUCTOR 0603 1 10uH L232 L233 SMT SMALL FIXED INDUCTOR 0603 2 470NH L234 L236 SMT SMALL FIXED INDUCTOR 0603 3 10uH L237 L238 SMT SMALL FIXED INDUCTOR 0603 2 470NH L239 SMT WIRE WOUND INDUCTOR 0805 1 30NH L240 SMT WIRE WOUND INDUCTOR 0805 1 23NH L241 L246 SMT FERRITE BEAD 0603 6 271T L247 SMT SMALL FIXED INDUCTOR 25...

Страница 28: ...ription of item Size LxW mm Qty Specification XF200 XF201 SMT CRYSTAL FILTER 2 38 5MHz Y200 CRYSTAL 1 NO USE Y800 CRYSTAL 1 NO USE VR200 SMT VARIOUS RESISTOR VER2 3 1 47K 5 VR500 SMT VARIOUS RESISTOR VER2 3 1 NO USE F100 SMT RESISTOR 1206 1 0R ...

Страница 29: ...3 Transmit Power meter VR200 43W 3 High power 1 CH TX low CH TX low CH TX center CH TX high CH TX high 2 Transmit Encoder knob 40W 5 0W 4 Mid power 1 CH TX low CH TX low CH TX center CH TX high CH TX high 2 Transmit 25W 3W 5 Low power 1 CH TX low CH TX low CH TX center CH TX high CH TX high 2 Transmit 10W 2W 6 DCS balance 1 CH TX low Wide CH TX center Wide Narrow CH TX high Wide 2 Transmit Modulat...

Страница 30: ...ow CH TX high Wide 2 Transmit 0 7kHz Wide 0 35kHz Narrow 150Hz 100Hz 11 DTMF deviation 1 CH TX center Wide Narrow 2 Transmit 3 0 kHz Wide 1 5kHz Narrow 100Hz Receiver Section Item Condition Measurement Adjustment Specifications Remarks Test equipment Terminal Parts Method 1 Sensitivity 1 CH RX low Wide Narrow CH RX center Wide Narrow CH RX high Wide Narrow 2 SSG output 121dBm 0 2μV Wide 119dBm 0 2...

Страница 31: ...1 PTT 5M R2 22K R17 33K R40 4K7 5M SUB P3_3 SSI 1 P3_4 SDA SCS 2 MODE 3 P4_3 XCIN 4 P4_4 XCOUT 5 RESET 6 P4_7 XOUT 7 VSS AVSS 8 P4_6 XIN 9 VCC AVCC 10 P5_4 TRCIOD 11 P5_3 TRCIOC 12 P5_2 TRCIOB 13 P5_1 TRCIOA TRCTRG 14 P5_0 TRCCLK 15 P2_7 TRDIOD1 16 P2_6 TR DIOC 1 17 P2_5 TR DIOB 1 18 P2_4 TR DIOA1 19 P2_3 TR DIOD0 20 P2_2 TR DIOC 0 21 P2_1 TR DIOB 0 22 P2_0 TR DIOA0 TRDC LK 23 P1_7 TR AIO INT1 24 ...

Страница 32: ... 10uH L240 24NH X L232 470NH L233 470NH R344 56R R275 220R C359 471P CV201 3 10P D221 JDV2S14E FH D219 JDV2S14E FH Q210 2SC4226 R24 VCO C345 471P L241 271T L246 271T L245 271T Q220 2SC1623 E204 33uF 10V R332 4K7 C348 471P D222 MA2S111 C349 471P VCO D230 1SV214 T1 VCO 8C Q211 2SC4226 R24 R245 1K TP205 CV R239 10K R288 470R E209 10uF 16V R217 1K R216 1K E210 0 47uF 35V E208 0 47uF 35V Q222 2SC4738 G...

Страница 33: ...70uF 25V 10 10 A 1 B 2 C 3 J502 PHONEJACK VLO C508 103P 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 J500 M IN INTERFAC E 0 5S 1 32PB A W N RSSI RX TX CLK DAT STB PLD MICI MICI SQL RSSI MICM RXC AFM DTM F DET SPM STB CLK DAT ELD PLD AIR RX TX W N TXC DTM F SUBO SUBB 8RX CONTROL 8TX CONTROL AM FM CONTROL SUB RXC AIR TXC C551 103P J C530 NOUSE R522 22K C515 ...

Страница 34: ...BLE PLL LD LINE DET SQUELCH DET MOD AUDIO PC TV MOD SUB WIDE NARROW RSSI RX TX FREQ CONT AF SQ TEMP 51 89UHF RF 51 89UHF RF Sch PLL CLOCK LINE PLL DATA LINE PLL STB ENABLE PLL LD LINE DET SQUELCH DET MOD AUDIO PC TV MOD SUB WIDE NARROW RSSI RX TX FREQ CONT AF SQ TEMP DET SQUELCH DET MOD AUDIO MOD SUB FREQ CONT WIDE NARROW RSSI RX TX PLL CLOCK LINE PLL DATA LINE PLL STB ENABLE PLL LD LINE PC TV 8RX...

Страница 35: ...DV 2400 PC board views 3 4 ...

Страница 36: ...DV 2400 PC board views 3 5 ...

Страница 37: ...36 DV 2400 PC board views ...

Страница 38: ...37 DV 2400 PC board views ...

Страница 39: ...MP REPEATER INTERFACE J503 D8 D14 D15 38 4MHz 8C 5M SW Q4 DTC114EE POWER ENCODERS SWITCH P45 S3 P44 P32 FUNC MODE REST 5M GND IDE INTERFACE J202 Y2 19 200MHz SHIFT DET D7 HSC277 SHIFT XOUT XIN MIC P10 P64 5C P65 MICG MIC HAND MIC INTERFACE UART DET SW UART UART P67 P66 TXD RXD Q8 DTC144TE D6 1SS372 D4 RX LED P06 AUD P02 MUTE MUTE PASS TONE TONE QT DQT MBL RLEDC TLEDC RSSI W NTC QT DQT SPM AFM SB A...

Страница 40: ...superheterodyne Intermediate Frequency 1st 2nd 38 85MHz 450kHz Sensitivity 12dB SINAD Wide 0 2μV or less Narrow 0 25μV or less Squelch Sensitivity Wide 0 158μV Narrow 0 178μV Adjacent channel selectivity Wide 70dB Narrow 60dB Spurious and image rejection ratio 70dB Audio Output 8Ω 5 distortion 2W or higher 5 distortion Audio Output Impedance 8Ω TRANSMITTER Power Output High 40W Mid 25W Low About 1...

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