Icom IC-F3GS, IC-F3GT service manual Power supply requirement

Page 44

 

SECTION 1

SPECIFICATIONS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ETS 300 086

EIA/TIA 603

 

 

 

 

 

 

 

 

Frequency coverage

 

400–430 MHz, 440–470 MHz, 470–500 MHz*1*2, 490–512 MHz*1, 490–520 MHz*2

 

 

 

 

 

 

 

 

 

Type of emission

 

 

16K0F3E (25 kHz: W-type), 14K0F3E (20 kHz: M-type), 8K50F3E (12.5 kHz: N-type)

 

 

 

 

 

 

 

 

Number of channels

 

100 ch (100 channel version, except ETS)

 

 

 

 

 

 

32 ch (16 channels 2 banks: 2-BANK version), 16 ch (16 channel version)

 

 

 

 

 

 

 

 

Power supply requirement

 

7.2 V DC (negative ground; supplied battery pack)

 

 

 

 

 

 

 

 

GENERAL

 

TX

 

at High

 

1.55 A

 

 

 

 

 

 

 

Current drain

 

at Low

 

800 mA

 

 

 

 

 

 

 

 

 

 

 

 

(approx.)

RX

 

rated audio

250 mA

 

 

 

 

 

 

 

 

 

stand-by

 

70 mA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Frequency stability

 

 

±2.0 kHz (W/M-type), ±1.5 kHz (N-type)

±0.00025%

 

 

 

 

 

 

 

 

Usable temperature range

 

–25˚C to +55˚C

–30˚C to +60˚C (–22˚C to +140˚C)

 

 

 

 

 

 

 

Dimensions (proj. not included)

54(W) 132(H) 35(D) mm; 2532(W) 5316(H) 138(D) inch

 

Weight (with BP-209)

 

355 g; 12.5 oz

 

 

 

 

 

 

 

 

 

Output power

 

 

High 4 W

 

 

 

Low 1 W

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Modulation system

 

 

Variable reactance frequency modulation

TRANSMITTER

 

 

 

 

 

 

 

Max. freqequency deviation

 

±5.0 kHz (W-type), ±4.0 kHz (M-type)*3, ±2.5 kHz (N-type)

 

 

 

 

 

 

 

 

 

 

Spurious emissions

 

0.25 µW @ < 1 GHz, 1.0 µW @ < 1 GHz

73 dBc typical

 

 

 

 

 

 

 

 

 

Adjacent channel power

 

70 dB (W/M-type)

70 dB typical (25 kHz)

 

 

60 dB (N-type)

60 dB typical (12.5 kHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transmitter audio distortion

 

Less than 5% at 1 kHz, 60% deviation

Less than 3% at 1 kHz, 40% deviation

 

 

 

 

 

 

 

Limitting charact of modulator

70–100% of max. deviation

 

 

 

 

 

 

 

 

Ext. microphone connector

 

3-conductor 2.5(d) mm (110")/2.2 kΩ

 

Receive system

 

 

Double-conversion superheterodyne system

 

 

 

 

 

 

 

 

Intermediate frequencies

 

1st: 46.350 MHz, 2nd: 450 kHz

 

 

 

 

 

 

 

 

 

Sensitivity (typical)

 

 

0.3 µV at 12 dB SINAD

0.3 µV at 12 dB SINAD

 

 

 

0.79 µV (emf) at 20 dB SINAD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Squelch sencitivity

 

 

0.3 µV typical (at threshold)

 

 

 

 

 

 

 

 

RECEIVER

Intermoduration rejection ratio

70 dB (W/M-type)

75 dB typical (W-type)

65 dB

70 dB typical

 

Adjacent channel selectivity

 

60 dB (N-type)

65 dB typical (N-type)

 

Spurious response

 

 

70 dB

70 dB typical

 

 

 

 

 

 

 

 

 

Hum and noise

 

 

45 dB typical (W/M-type)

45 dB typical (25 kHz)

 

 

 

43 dB typical (N-type)

40 dB typical (12.5 kHz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Audio output power

 

500 mW typical at 5% distortion with an 8 Ω load

 

(at 7.2 V DC)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

External SP connector

 

3-conductor 3.5(d) mm (18")/8 Ω

 

 

 

 

 

 

 

 

Measurements made in accordance with EIA/TIA-152-C, 204-D, 603 or ETS 300-086. *1EIA/TIA version only, *2General version only, *3ETS/CEPT version only

All stated specifications are subject to change without notice or obligation.

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Image 44
Contents VHF FM Transceivers Repair Notes IntroductionOrdering Parts Table of Contents Section Specifications EIA/TIABottom View Inside ViewsMain Unit TOP View Disassembly and Option Instructions Disassembly InstructionRemoving the Chassis Panel Removing the Main UnitOptional Unit Installations Circuit Description Receiver CircuitsTransmitter Circuits Power Supply Circuits Voltage Line PLL CircuitPort Allocations Output Expander IC IC10Adjustment Procedures Preparation¥ JIG cable Top view PLL Adjustment Software Adjustment TXFSoftware Adjustment Parts List Main UnitVariable Thermistor NTCCM20124AG473J-T Tantalum ECST0JY106R Chassis Unit Chassis Parts Mechanical Parts and DisassemblyAccessories IC-F3GS parts Diodes SEMI-CONDUCTOR InformationTransistor and FET’S Board Layouts General and EIA/TIA Versions Except W/N-TYPEMP6 Main Unit Bottom ViewIC1 ETS/CEPT VersionMP5 VHF FI1 Parts List Disassembly InformationBC-137 Optional Desktop Charger Informasion ConvenientVoltage Diagram Board LayoutBlock Diagram Option UnitVoltage Diagram BU4066BCFVBand of ETS/CEPT version N-type DTA144EU Section Voltage Diagram Avref Vtref Toned Tonem AvccPage 32, Kamiminami, Hirano-ku, Osaka, 547-0003, Japan UHF FM Transceivers IC-F4GTIC-F4GS Preparation PLL Adjustment Software Adjustment Power supply requirement APC IC3A NJM3403AV Disassembly and Option Instructions Optional Unit Installations 2ND if and Demodulator Circuits RF signal From PLL Driver PLL Circuit Power Supply Circuits Voltage Line Resistor R132PTT Adjustment Procedures Screen Display Example DC Power Cable Connections L405 L11 Powerlo BPF T1 NJM3403AV-TE1 IC4 Resistor ERJ2GE Thermistor NTCCM1608 4LH 223KC Ceramic ECUE1H470JCQ ECEV1CA470SP Other Ceramic ECJ0EB1E471K Band MHz band MHz and H-band IC-F4GS parts DTA144 EU DTC144 EE DTC144 EU DTC144 TU LOW Band DS1FI1 440-470 MHz Band Except W/N-TYPE Icom 470-500 MHz and High Bands B5542B C308 Q19 B5688B BC-137 Optional Desktop Charger Informasion Voltage Diagram Type Type of GEN Type of GEN and EIA/TIA version NJM3403AV M1-band of GEN and EIA/TIA version G W-type of GEN Type 2SC3585 R44 Q403 2SC5107 O Band of ETS/CEPT version N-type M1 440-470 MHz-band Page 13713IZ-C1U
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