Informations de l’équipement
|Icom IC-245E Amplificateur|
|Catégorie:||Audio, Vidéo, TV, Multimédia|
|Description:||2 Meter FM SSB CW Digital Synthesized Transceive|
Multi-mode mobile transceiver The IC-245E provides 144 - 146MHz FM, USB, CW coverage in the 144 - 146MHz frequency range. Thus the IC-245E can be used for DX, local calls, and satellite work. Refined appearance and convenient layout The knobs are easy to handle, the readout is large and easy on the eyes due to digit brightness during the day and automatic dimming in darkness, and the meter is easy to read. Again, Icom has produced a set that is as attractive as it is functional. A unique C-MOS LSI The Icom chip makes the IC-245E a revolutionary transceiver. This multi-function chip incorporates years of Icom digital and PLL technology development. Compact size, dual VFO performance and an accurate, stable, digitalized frequency readout are possible due to the chip. Pulses generated by turning the dial are counted, thus controlling an up/down counter that controls a programmable divider in the PLL to change frequencies. Crystal-controlled oscillator-accurate levels are produced. SSB tuning is 100Hz per vernier increment and FM is 5KHz per vernier. Dual VFO’s Two separate VFO’s can be used either independently or together for simplex operation, and any desired frequency split in duplex operation. Continuous tuning system ICOM’s new continuous tuning system features an LED display that follows the tuning knob movement and provides and extremely accurate readout. Frequencies are displayed in 4 LED digits representing MHz to KHz. 100Hz digits are represented by each vernier scale mark. Automatic recycling restarts tuning at the top of the band, i.e., 145.999MHz when the dial goes below 144.000MHz. Recycling changes 145.999MHz to 144.000MHz as well. Quick tuning in 5KHz steps is available, and fine tuning in 100Hz steps is provided for trouble free QSO operation. A click-stop mechanism prevents knob rotation due to vibration in mobile use. Excellent performance in operation Nearby strong signal interference is overcome by a MOSFET RF Amplifier circuit, a specially designed 1st mixer circuit and the helical cavities used in the IC-245E. These same elements provide great selectivity for binary signals, and maintain a high, stable sensitivity. A system of cascaded filters gives exceptional FM performance, and SSB performance is insured by a monolithic crystal filter and a ceramic filter. The transmitter uses a balanced mixer in a single conversion system, a band-pass filter and a high-performance low-pass filter. This system provides distortion-free signals with a minimum spurious radiation level.
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|Icom -- IC-245E -- Service et Manuel de l'utilisateur|
|Type manuel:||Service et Manuel de l'utilisateur|
|Taille:||2.98 Mbytes (3120490 Bytes)|
|Qualité:||Document scanné, tous les lisible.|
|Télécharger date:||25 janvier 2014|
|Téléchargements:||674 depuis 25 janvier 2014|
I FEATURES ... 1 II SPECIFICATIONS ... 2 III CONTROLS ... 5 IV INSTALLATION ... 7 V INSIDE VIEW ... 11 VI OTHER REMARKS ... 13 VII OPERATION ... 13 VIII CHARTS ... 17 IX PARTS LIST ... 21 X VOLTAGE CHARTS ... 27 XI BLOCK DIAGRAMS ... 29
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