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Icom - IC-745 - Ricetrasmettitore
Fabricante:
Equipaggiamento:
IC-745
Data:
Categoria:
Gruppo:
Sottogruppo:

Informazioni

ALL BAND, ALL MODE, ALL SOLID-STATE The IC-745 covers all the Amateur HF frequencies from 1.8MHz to 29.700MHz, including the new three bands of 10MHz, 18MHz and 24MHz. It offers not only SSB, but also CW, AM (Receive only), FM (Option) and RTTY. All of the circuits in the IC-745 including the driver and final power stages are completely solid-state, and provide about 100 watts output. GENERAL COVERAGE Receiver CAPABILITY The IC-745 has capabilities for an all amateur band Transceiver as well as a general coverage Receiver between 100KHz and 30MHz with continuous tuning. The Up-conversion system using a high side IF and Microcomputer Control System make these capabilities possible. In addition to these, the low-pass filters and the band-pass filters are selected by an electric signal from the CPU and it makes a no tune-up system. DUAL VFO Dual VFO's controlled by a large tuning knob provide easy access to split frequencies used in DX operation. Normal tuning rate is in 10Hz increments and increasing the speed of rotation of the main tuning knob shifts the tuning to 50Hz increments automatically. Pushing the tuning speed button gives 1KHz tuning. 16 MEMORIES Sixteen tunable memories are provided to store mode, HAM/GENERAL COVERAGE mode, and frequency, and the RAM is backed up by an internal lithium memory backup battery to maintain the memories for up to seven years. Scanning of frequencies, memories and bands are possible from the unit, or from the IC-HM12 scanning microphone. Data may be transferred between VFO's, or from VFO to memories. OUTSTANDING Receiver PERFORMANCE Utilizing an Icom developed Double Balanced Mixer, the IC-745 has a 100dB dynamic range. The 70.4515MHz first IF virtually eliminates spurious responses, and a high gain 9.0115MHz second IF, with ICOM's PBT provides the ultimate in selectivity. A deep IF notch filter, adjustable AGC and noise blanker (can be adjusted to eliminate the woodpecker), audio tone control, plus RIT provide clear reception even in the presence of strong QRM or high noise levels. A low noise Receiver preamp provides exceptional reception sensitivity as required Transmitter The Transmitter features high reliability transistors in a low IMD (—38dB ~100W), full 100% duty cycle (internal cooling fan standard), 12 volt DC design. Quiet relay selection of Transmitter LPF's, transmit audio tone control, monitor circuit (to monitor your own CW or SSB signal), XIT, and a high performance speech processor enhance the IC-745 transmitter's operation. For the CW operator, optional keyer and semi break-in are provided for smooth and fast keying. OTHER FEATURES All of the above features plus full function metering, SSB and FM squelch, convenient large controls, a large selection of filters, and a high visibility flourescent display make the IC-745 your best choice for a superior grade HF base Transceiver

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2 Manuali

Manuale di servizio e utente
Tipo di manuale:
Manuale di servizio e utente
Pagine:
38
Dimensione:
4,8 MB
Lingua:
inglese
Revisione:
ID manuale:
A-0507
Data:
Qualità:
Documento scansionato, tutto leggibile.
Data caricamento:
26 Gennaio 2014
MD5:
a6223597-42d3-1c96-33f8-2f239202df68

Informazioni

SECTION 1 SPECIFICATIONS... 1 SECTION 2 FEATURES... 2 SECTION 3 INSTALLATION... 3 SECTION 4 OPERATING CONTROLS... 6 4- 1 FRONT PANEL... 6 4- 2 TOP COVER... 9 4- 3 REAR PANEL CONNECTIONS... 10 SECTION 5 OPERATING INSTRUCTIONS... 11 5- 1 HOW TO TUNE... 11 5- 2 MEMORY CHANNEL OPERATION... 15 5- 3 TUNING BY UP/DOWN BUTTONS ON THE MICROPHONE...16 5- 4 SCANNING OPERATION...*17 5-5 SSB OPERATION...18 5-6 CW OPERATION...21 5- 7 RTTY OPERATION...21 5-8 AM OPERATION...22 5- 9 FM OPERATION (OPTION)...22 5-10 GENERAL COVERAGE Receiver 23 5-11 OTHER OPERATIONS...23 SECTION 6 OPTION INSTALLATION...25 SECTION 7 INSIDE VIEWS...31 SECTION 8 TROUBLESHOOTING...33 SECTION 9 BLOCK DIAGRAM...34 SECTION 10 SCHEMATIC DIAGRAM...SEPARATE

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Downloads:
1353
Download del mese scorso:
14
Download icom--ic-745--service-user--ID5429.pdf
Manuale di servizio
Tipo di manuale:
Manuale di servizio
Pagine:
126
Dimensione:
18,0 MB
Lingua:
inglese
Revisione:
ID manuale:
A-0504
Data:
Qualità:
Documento scansionato, tutto leggibile.
Data caricamento:
26 Gennaio 2014
MD5:
bea509eb-c1e5-f296-57b9-51b380a0b054

Informazioni

SECTION 1 SPECIFICATIONS... 1 - 1 SECTION 2 OPERATING CONTROLS... 2-1-5 SECTION 3 OPERATING INSTRUCTIONS... 3- 1-15 3- 1 HOW TO TUNE... 3- 1 3- 2 MEMORY CHANNEL OPERATION... 3- 5 3- 3 TUNING BY UP/DOWN BUTTONS ON THE MICROPHONE. 3- 6 3- 4 SCANNING OPERATION... 3- 7 3- 5 SSB OPERATION... 3- 8 3 - 6 CW OPERATION... 3-11 3- 7 RTTY OPERATION... 3-11 3- 8 AM OPERATION... 3-12 3- 9 FM OPERATION (OPTION)..,... 3-12 3-10 GENERAL COVERAGE Receiver 3-13 3-11 OTHER OPERATIONS... 3-13 SECTION 4 CIRCUIT DESCRIPTION... 4- 1-12 4- 1 Receiver CIRCUITS... 4- 1 4- 2 Transmitter CIRCUITS... 4- 3 4- 3 PLL CIRCUITS... 4- 5 4- 4 LOGIC CIRCUITS... 4- 8 SECTION 5 BLOCK DIAGRAM... 5- 1 SECTION 6 INSIDE VIEWS... 6-1-2 SECTION 7 OPTIONS INSTALLATION... 7-1-6 SECTION 8 MECHANICAL PARTS AND DISASSEMBLY... 8- 1-11 SECTION 9 MAINTENANCE AND ADJUSTMENT... 9-1-6 SECTION 10 VOLTAGE (CIRCUIT) DIAGRAMS... 10- 1-12 SECTION 11 IC RATINGS... 11- 1- 6 SECTION 12 PARTS LIST... 12- 1-21 SECTION 13 SCHEMATIC DIAGRAM... 13- 1 SECTION 14 BOARD LAYOUT... SEPARATE

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Downloads:
1661
Download del mese scorso:
12
Download icom--ic-745--service--ID5430.pdf