IC-7700 New PA uses a STAC2942 (Rev S/N #12 #13) – NPR rx Testing by VA7OJ Adam

New IC-7700 MOSFET PA Unit - The IC-7700′s (S/N #12 USA/Canada, S/N #13 EUR etc.*) now have just one Mosfet (STAC2942) on the PA board, instead of the two MRF-150 of previous PA Unit (ex S/N #02 USA/Canada, ex S/N #03 EUR etc.*)
NPR Testing HF Receivers – Noise Power Ratio (NPR) Testing of HF Receivers Using notched noise to evaluate dynamic receiver performance – (To put the impact of the NPR test into perspective, a -9 dBm Ptot level at 5.6 MHz BRF is equivalent to 1200 simultaneous SSB signals at -43 dBm each, i.e. S9 + 30 dB!) etc…. by Adam Farson, VA7OJ/AB4OJ- (!! updated in March, 2013)

Link to: NPR Testing of HF Receivers by VA7OJ, Adam (pdf ENG)

IC-7700 HF 50MHz Transceiver new PA-UNIT  送信ファイナル段には、高Poのバイポーラトランジスタ（STAC2942）を採用した広帯域パワーアンプを搭載。- Higher Power – STAC2942 & STAC3932 saturates at over 500W  - (updated 18 April, 2012 by radiocronache!)

Nuovo PA Unit sull’IC-7700 - La nuova serie di IC-7700 (S/N #12 USA/Canda, S/N #13 EUR ecc.*) montano un solo dispositivo MOSFET (STAC2942) sulla scheda PA-UNIT, invece dei due transistor MRF-150 della precedente versione del PA-Unit (ex S/N #02 USA/Canada, ex S/N #03 EUR etc.*)

L’attuale Rev. #12/#13 incorpora la nuova versione del PA-UNIT e moduli LPF, inoltre diversi altri moduli del transceiver sono “up-rev.” rispetto alle versioni precedenti. - Ora tutti gli IC-7700′s con un “1″ nella prima cifra del S/N (numero di serie) hanno il nuovo PA-UNIT e i moduli LPF.
Esempio*: Giappone: #11XXXXX – USA / Canada: #12XXXXX – UE: #13XXXXX etc.

The current Rev. #12/#13 version incorporates the new PA-UNIT and LPF modules, and in addition several other modules are also “up-rev.” from the earlier version.

The IC-7700 uses a STAC2942 power amplifier in common source push-pull configuration (common source). The power amplifier provides a eliable 200W of output power up to 54MHz. – The STAC2942B is a gold metallized N-channel MOS field-effect RF power transistor. It is intended for use in 50 V DC large signal applications up to 250 MHz (ST datasheet)
The effective quad cooling fan system makes it possible to generate 200W full power output even during full duty cycle operation.

[Note*] IC-7700′s Version and Intended Country of Use: S/N #13 (Europe-01) #14 (France-01) #15 Italy-01) #16 (Spain-01) #17 (United Kingdom-01) #012 (America)
ICOM Inc. Japan/ICOM (Europe) GmnH have released the latest Declaration of Conformity CE on 25th Mar. 2011 - (Previous 12th Feb. 2008) Source: IC-7700 Manual ENG Ver. A-6937H-1EX-1 – Link to: Icom Co. Jp –  iC-7700 Official Features

[Rumors] It is said that the manufacturer of the MRF-150 used in the 7700′s series PA Unit, has recently discontinued this supply. This event has probably brought Icom to design a new PA Unit based on  the new DMOS STAC2942 ©STMicroelectronics parts.
 * Other regional variants will have different serial number for the change-over to a MOSFET PA – (!! Official info: ask retailers or Icom Inc., please)
[Note] – Detailed specifications: please see the official ICOM Inc. sources - All specifications are subject to change without notice – All trademarks belong to their respective holders.

Icom RS-BA1 Ver.1.30 – RC-28 Remote Encoder – Legal aspects! Rig Monitoring a different purpose

The new RC-28 Remote Encoder accessory gives users a tactile approach to the RS-BA1 Remote Control. Icom has released the Ver.1.30 !! - The RS-BA1 allows you to use the radio installed in another room using your home network or even from a remote location over the Internet. – (operator not physically present in the Remote Rig) – See the legal aspects below – Info to Rig Monitoring  on the Computer Screen (For Vision-Impaired Ham Radio op.) - See the Link below.

RS-BA1 [Note] ….Visual Basic and use MSCOMM control can not detect a change in the Windows Device Table (after the COM port has been opened for use) - These programs hang when the hardware table changes while the port is open – (This is not the programmers fault!)
!! a solution: [Exit] the program first, then turn the Icom Rradio [OFF].

[Note] Legal aspects! (FCC – CEPT – DXCC par. 9) see related link below; – Why remote? and many helpful references by John, KØIZ, read August 2012 QST Magazine ( pg. 39-40)! - (operator not physically present in the country and transnational remote operation, DXCC rules ref. to remote operation and credit etc.)
Link to: Transnational Remote Operation (by TF/KL1A)
Link to: ARRL Guide by WA8IMY Remote Operating

Now Icom comes out with a great new gadget, RC-28 a little box with a VFO knob, 2 programable buttons and a PTT button. The RC-28 is designed to connect to a PC through a USB port, and operate with the RS-BA1 IP Remote Control Software. – Supplied a USB cable (approximately 1.5 m; 4.9 ft) - (RC-28.. like Tmate USB Tuning System …by WoodBoxradio)
[Note] – 1) Make sure Windows has completed its start-up on PC. – 2) Connect the RC-28 to the PC that has RS-BA1 Ver.1.30 or later version installed on it. When the “USB dial…” item on the [Option] menu is not displayed, Please download the RS-BA1 latest version 1.30 from the Icom website, and install it.
[Note] Please read ICOM RC-28 instructions (leaflet PDF) thoroughly before using it.

Link to: Icom RS-BA1 Ver.1.30 Official download page
Link to: Icom RS-BA1 /RC-28 brochure (update 12PS0230)

RS-BA1 Remote Control Software Upgrade Ver. 1.30 is now downloadable from the Icom co.Jp site. – This upgrade is not stand-alone, and must be installed over a licensed base installation of RS-BA1. (Update, the remote utility is still V.1.2 but the remote control is V.1.3!!) – US Retail price RS-BA1 software is $129.99

[Notes]: DO NOT allow the PC to go into the sleep or standby mode while using the RS-BA1 Software. Otherwise, it might not work properly after the PC resumes normal activity.
When not using the radio: Disconnect the radio from both the Remote Utility and Remote Controller. – Even if you disconnect from the radio, it does not turn OFF the radio!

Since cannot turn the radio ON or OFF with RS-BA1 Remote Control operation, the radio must be turned ON. – [Note] there other control board and software (no Icom) to control power to equipment or other options, it works together with Icom RS-BA1 or HRD software etc.

Rig Monitoring with the Icom RS-BA1 Program on the Shack
(Copyright © 2012, AE7PD, Peter – see the link below)
Vari articoli (ENG) di Peter sono dedicati ai radioamatori (compresi i radioamatori ipovedenti) che desiderano visualizzare direttamente nello shack le impostazioni di un ricetrasmettitore HF sullo schermo del computer per una migliore visibilità (Così è possibile vedere in grande la grafica “GUI” di RS-BA1 ed operare con il mouse e la tastiera, oltre ai controlli con le manopole e pulsanti della stessa Radio!) – Peter tratta anche altri sistemi per PSK-31 per Kenwood, Elecraft ecc. – Vedere i link qui sotto.

This article is about using RS-BA1 for a different purpose to make the radio settings easier to read using a nearby computer screen ( also for vision-impaired ham-radio!) - Also, you can operate with a mouse and keyboard in addition to the controls on the radio (on the shack!) – See the link below for many other issues and tips by AE7PD.

Link to: Icom RS-BA1 Program to Rig Monitoring (AE7PD)
Link to: Ham Radio and Vision website (many others issues) 

See the RS-BA1 Remote Controller’s help file for remote operation details, such as how to change the frequency, or turn ON each function. - To display the help file, click “Contents” in the Help menu on the Remote Controller, or push [F1]

Link to: RS-BA1 Instruction Manual – RS-BA1 Guide’s (1)/(2)/(3)

[Note] All marks are property of their respective owners. Specifications are subject to change without notice!

Icom Firmware updates: IC-7600 Ver.1.11 IC-7700 Ver.1.21, IC-7800 Ver.2.30

IC-7600 Ver.1.11 has just benn posted 3/3/2011 - IC-7700 Ver.1.21 just benn posted 3/3/2011 and IC-7800 Ver.2.30 last updated on 31 January 2011. – Icom® have released these Firmware to increase the RS-BA1® IP Remote control functions and the new Time-Out Time Increase security. – For IC-7600 last Ver.1.11 Improvement of firmware Ver.1.10 (taken off) – Fot IC-7700 last Ver.1.21 Improvements software performance for the DSP UNIT. See the Link and news below…

Please read 7600/7700/7800 Firmware update information if you want to know more detail information of additional functions – !! The last Firmware is cumulative  of the previus improvements

Nuovi firmware per IC-7600 Ver.1.11 e per IC-7700 Ver.1.21 appena rilasciati

IC-7600, la Ver.1.11 del firmware è stata appena inserita oggi 03.03.2011 nel sito-web della ICOM  Jp. Il nuovo firmware aumenta i comandi e le funzioni per il C.IV control e per l’utilizzo del programma RS-BA1 Controllo remoto dei Transceiver sia via LAN da altre stanze di casa oppure via Rete Internet da qualsiasi altra località (Nota: leggere bene il manuale istruzioni RS-BA1 !)

IC-7700, la Ver.1.21 del firmware è stata inserita sempre il 03.03.2011 nel sito-web della ICOM Jp. Comprende tutti gli aggiornamenti precedenti, le nuove funzioni per RS-BA1 Controllo remoto ecc. in più Icom introduce qui miglioramenti alle funzioni della Unità DSP.

Per favore leggere le informazioni Icom per tutti i  nuovi firmware rilasciati, per conoscere tutti i dettagli informativi e tutte le  funzioni addizionali implementate, compresi tempi per il Time-Out Timer ora variabile da menù per maggior sicurezza  -  Gli ultimi firmware sono cumulativi dei precedenti!

Icom® has also released a new Software, Version 1.10 of the USB Driver on 12/24/2010. The Driver supports the following radios (as of December 2010): IC-7200 – IC-7410 – IC-7600 and IC-9100. This driver is for Windows® XP, Windows Vista® and Windows® 7 only, if you require to USB driver for Windows® 98SE/Me/2000, please use Ver.1.00. – See the Link and news below…

The RS-BA1 allows you to use the radio installed in another room using your home network or even from a remote location over the Internet - Most functions and modes of your transceiver, including interference rejection functions and IF filter settings, can be controlled. Also, S-meter and SWR can be observed, and more. - [Note] Click the image RS-BA1 GUI to enlarge

Firmware update information – (source: icom releases)

→ The configurable range of the CI-V address has changed to between 01h and DFh

→ Additional functions for CI-V commands are provided to support the RS-BA1 (Remote IP), as described on the Icom update  information in PDF format. Command 10 has changed to be used not only to send tuning step settings, but also to read the.
While transmitting in the CW mode, or if the Break-in function is ON, the transceiver transmits CW code when the PC sends this comman, etc.

→ A new feature, the Time-Out Timer (CI-V) function is added to the Others Set mod. Turns the Time-Out Timer function ON  (3, 5, 10, 20 or 30 minutes) or OFF. Increased security: If a continuous transmission exceeds the selected time period,  this function will cut off the transmission, to prevent a prolonged transmission. (default: OFF)
[Note]: This function will be activated only when you transmit using CI-V commands, or pushing [TRANSMIT] on the transceiver!

→ For IC-7600 last Ver.1.11 Improvement of firmware Ver.1.10 (taken off)
→ Fot IC-7700 last Ver.1.21 Improvements software performance for the DSP UNIT.

Link to: IC-7600 Firmware Ver.1.11 downl page now update 2011/03/03
Link to: IC-7700 Firmware Ver.1.21 download page update 2011/03/03
Link to: IC-7800 Firmware Ver.2.30 download page update 2011/01/31

Link to: Icom co jp word support  download the Software Ver.1.10  USB Driver

Link to:  See the Icom inc jp RS-BA1 Features ENG  official web-page
Link to: See the Marcucci Spa importer RS-BA1 IT web-page and price

About the Remote control system:
An RS-BA1® remote control system consists of at least one PC, which is used as a Base station (Server) and at least one PC, which is used as a Remote station (Client). Both PCs have to be connected with a network. [Note] Click the Remoting a Icom Radios picture to enlarge

Radios are physically connected to the Base station, and the Remote station can operate the radios through the network. In the remote control system, CI-V commands, control commands such as “Connect” and “Disconnect,” and audio are exchanged between a Base station and a Remote station, through their Remote Utilities.
Most functions and modes of your transceiver, including interference rejection functions and IF filter settings, can be controlled. Also, S-meter and SWR can be observed – Rx Voice recording function available and more.

The latest Firmware Updates Ver.2.21 IC-7800, 1.12 IC-7700 and 1.02 IC-7600, of 2010/04/01

Firmware Updates IC-7800 / IC-7700 / IC-7600 – Nuovi aggiornamenti  dei Firmware di Icom Inc. – Other news: Icom have released a new Ver. IC-7600  User Manual En 1EX-3 - of 01 Feb, 2010
—- © www.radiocronache.com – Source data: Website Icom Inc. Osaka, Japan

The DSP IF filter shape factor (-6/-60 dB). This is the ratio of the -60 dB bandwidth to the -6 dB bandwidth, which is a figure of merit for the filter’s adjacent-channel’s rejection. The lower the shape factor, the “tighter” the filter. – The two type of DSP filter shape factor for each SSB, SSB-Data and CW can be selected independently from soft and sharp.
A sharp profile with a flat passband and soft profile with a more rounded passband (Twin Passband Tuning [TWIN-PBT] is also easily provided, which enables the filter sides to be both indipendently moved and narrowed, the DSP also provides audio filtering and shaping functions). Depending on  the operating situation, for example handling a pile-up or receiving a very weak signal, you can flexibly change sharp and soft filter shapes or reduce or shift the filter width, even while receiving a signal, by a simple push of a front panel key. See the latest Ver. for each model and Link below..

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IC-7700 New Firmware Version 1.11. Improvements in the TX monitor audio level

IC-7700 update Ver 1.11;  Icom have released a new firmware version 1.11 for the IC-7700; Icom Inc. Update 14/09/2009.  A description of the changes, download F/W  and new User Manual (rev 1EX-2a) appear in the link  below – Tks  IW0SAF, Moreno  for the photo by his Shack!

Icom Major points of the Ver.1.11 update: Improvements in the TX monitor audio level.

[Note] The output of the monitor demod is fed into the main receiver audio amplifier, whose gain is controlled by the AF Gain control. The AF Gain pot is the “master fader”. All Icom transceivers equipped with a monitor circuit are configured in this way……
(continua…)

IC-7700 New Firmware Version 1.10, provide interesting additional functions to this radio

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IC-7700 Firmware update Ver 1.10;  Icom have released firmware version 1.10 for the IC-7700 Update 2009/06/08 – A description of the changes and download F/W appear in the link  below:

Link to: Icom download the 3-page description of changes including screen shots
Link to: Icom.co.jp Word Support Firmware file download

IC-7700 aggiornamento Firmware Ver 1.10; La Icom ha rilasciato il nuovo aggiornamento per il transceiver IC-7700 in data 08/06/2009. Le istruzioni, le informazioni e il download dei files si scaricano anche accedendo ai  link qui sopra.
The firmware version of the IC-7700 can be confirmed during turning power ON  • The version appears at the right bottom corner.
[Note] Never cut off power to the transceiver while updating the firmware!
I have a sneaky feeling that interrupting the update process can corrupt the boot-loader (See the Note) For safety’s sake, plug the 7700 into the computer UPS (750 VA) when upgrading (UPS = Uninterruptible Power Supply)  However i belive that any thorough design would must have a boot-loader in a protected sector of the flash of  course so that it couldn’t be erased under normal software update circumstances.
ICOM issued a clarification stating that the firmware updates are in fact cumulative. When you install 1.10 it include the updated previus features
As recommended by Icom, first save your custom settings to USB memory. Upgrading to F/W version 1.10 results in a  *full reset* of the IC-7700

IT
[Note] Non togliere alimentazione al transceiver durante l’aggiornamento del firmware!
Si dice che potrebbe essere dannosa una interruzione del processo di aggiornamento perchè può corrompere il boot-loader. Quindi, per motivi di sicurezza, durante il processo di aggiornamento con il computer è opportuno alimentare il transceive collegandolo alla rete elettrica tramite un UPS da 750 VA minimo (UPS = Gruppo Statico di Continuità)
Credo tuttavia che qualsiasi progettazione accurata deve avere un boot-loader in un settore separato della flash-memory in uso, in modo che essa non dovrebbe essere cancellata durante le normali fasi di aggiornamento del software.
ICOM ha rilasciato un chiarimento che, gli aggiornamenti del firmware sono in effetti cumulativi. Quando si installa la 1,10 si include gli aggiornamenti rilasciati in precedenza
Come raccomandato dal Icom, prima salvare le impostazioni personalizzate in una memoria USB. L’aggiornamento del F/W versione 1,10 comporta anche il *reset completo* del IC-7700
IW0SAF, Moreno ha fornito la foto del IC-7700 che viene inserita in questo articolo, grazie.

——> Please read the official Icom documents and Icom instructions!

IC-7700: Icom Japan have released the latest firmware V1.04 on Dec 11, 2008

IC-7700 New Firmware Update – Icom Japan have released the latest firmware V1.04 on Dec 11, 2008.

Un nuovo Firmware Ver. 1.04 per l’IC-7700 è stato rilasciato dalla Icom Japan Global Support  ieri 11 Dicembre 2008.

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La Icom dichiara che qusta nuova release apporta miglioramenti nel software che gestisce le performance nel DSP-Unit.  Le prime impressioni fanno osservare un miglioramento molto fine nel funzionamento [ NR] che ora sembra tracciare i picchi in modo un po ‘più veloce e attenuare un po’ meno i toni alti rispetto all  ver. 1.03 – Altra segnalazione riguarda  migliore comprensione durante la ricezione di BCC -SW in AM ascoltati in modo SSB/ECSS per rilevare segnali DX deboli, ora meno soggetti a distorsione da Qrn. 

Link to: ICOM.co.jp – World Support official web page

ENG:  Major points of update from Ver.1.03 to Ver.1.04: Improvements in the software performance for the DSP UNIT
Noted a very subtle improvement in [NR] operation. The NR seems to track voice peaks a little faster and attenuate highs somewhat less than in ver. 1.03.
Noted now listen to AM BBC WS on SSB/ECSS during the day during non DX time and hear it without the previous annoying distortion, as the audio no created loud transients of high notes. – - -  (Credit: Icom.co.jp/world/ Support)

The PA Unit from IC-7700 delivers 200W – Some common sense rules for ensuring long PA life!

The final PA stage from IC-7700 delivers 200W.  Lo stadio finale di potenza realizzato da Icom per il transceiver IC-7700 eroga 200W (at full duty cycle) con un circuito push-pull di due MRF150 Power Field-Effect Transistor, prodotti dalla “tyco/Electronics – M/A-COM” ed alimentati con 48V DC.
Transistor progettati per stadi di uscita linerai di potenza con frequenza fino a 150MHz. Specifiche da M/A-COM Technical Data  a 50 Volts, 30MHz, per ciascun MRF150: Output power = 150 Watts; Power Gain 17 dB (Typ); IMD (d3) (150W PEP) -32 dB (Typ); IMD (d11) -60 dB (Typ); 100% Tested for load Mismatch at all Phase angles with 30:1 VSWR!
Con il Link qui sotto si potrà leggere le regole di buon senso per una lunga vita delllo stadio finale di potenza. Regole che valgono per tutti gli apparati con PA a transistor! I consigli di Adam VA7OJ’s sono ben descritti nella sua pagina web appositamente dedicata, che si può scaricare con il Link qui sotto.

ENG: Download and read my friend Adam VA7OJ’s article “Common-Sense Rules for Long PA Life”  (Link up)
The final PA stage delivers 200W (at full duty cycle) with a push-pull circuit using two MRF150 MOSFET RF power devices from tyco/Electronics M/A-COM, fed with 48V DC. The circuit is well-designed. The MRF150 designed primarily for linear large-signal output stages up to 150MHz frequency range.

IC-7700 RF UNIT, 2nd Mixer as a image rejection. Circuit Description

IC-7700 RF UNIT, 2nd Mixer as a image rejection, Circuit Description. Note the large toroidal coils, BPF bank
Il segnale convertito di 1st IF viene poi filtrato da uno dei tre Roofing Filters (3-6-15 kHz). Il segnale di 1st IF filtrato viene suddiviso in due prima di essere applicato al 2nd Mixer che è un Mixer ad alta rejezzione d’immagine IF.
Ciascuno dei due segnali splittati dalla 1s IF vengono mixati con i segnali del 2nd OL provenienti dal PLL UNIT, per essere convertiti nella 2nd IF a 36kHz. Uno dei segnali di OL  è spostato in fase di 90 gradi prima di essere applicato al 2nd Mixer (un 9A41-G), e così anche uno dei segnali convertiti di  2nd IF risulta con fase diversa di 90 gradi rispetto all’altro.
Questi due segnali convertiti di 2nd IF, sfasati tra loro di 90 gradi, sono ricombinati per la differenza di fase da un  sommatore (NJM074M) per ottenere così un unico segnale lasciando fuori gli altri segnali non coincidenti. Il segnale di 2nd IF ricombinato viene  fatto entrare nell’ADC (AK5394) per essere convertito a 24-bit in dati seriali. I dati seriali (digitali) sono applicati al DSP (TMS320C6727), sulla MAIN UNIT.

Link to: Adam, VA7OJ’s IC-7700 User Review web page

ENG: The converted 1st RX IF signal is then filtered bay one of 1st IF Roofing Filters (3-6-15 kHz).
The filtered 1st IF signal is splitted into two before being applied to the 2nd Mixers, as a image rejection Mixer. Each divided 1st IF signal is mixed with 2nd LO signals from the PLL UNIT, to be converted into the 36kHz 2nd RX IF signal. One of the LO signal is 90 degrees phase-shifted before being applied to 2nd Mixer (9A41-G), and the converted 2nd RX IF is 90 degrees phase-shifted too.
These converted 2nd IF signals whose phase is different each other are phase-shifted by the phase shifter, then composed by the composer (NJM074M). The composed 2nd IF signal is amplified by another 2nd IF AMP, then entered to the ADC (AK5394) to be converted into the 24-bit serial data. The serial data is applied to the DSP (TMS320C6727) on the MAIN UNIT.

Icom, Icom Inc. are registered trademarks of Icom Incorporated  (Jp) – Image (c) i0gej’s radiocronache

IC-7800, IC-7700, IC-7200 and IC-7600. Truth of Icom HF Transceiver; View or Download Special Movie on Japanese

Truth of Icom HF Transceiver IC-781 to IC-7600. Special Movie from Icom: La verità sui noti Transceiver HF della Icom dotati di Monitor multifunzione, lo sviluppo della tecnologia DSP dedicata allo  Spectrum-Scope che è diventato un vero strumento di misura con BW e Span variabile, rispetto al primo innovativo IC-781 dotato di Monitor CRT con dati i immagini interessanti.
L’evoluzione delle performance con speciali circuiti sviluppati da Icom come: validi D-MOS FET Quad-Mixer in 1st IF, preceduti dal Preselettore (DIGI-SEL) e dal BPF con bobine su toroidi e relè di commutazione. Impiego di Roofing Filter Hi-Spec e utilizzo di un Mixer I/Q nella 2st IF per elevare sia la Reiezione di immagine che la Reiezione di segnali forti adiacenti con migliore IP3 e IMD.  Sviluppo della tecnologia digitale  con IF DSP ora di 4^ geneerazione a 32bit e AD/DA a 24bit ad alta velocità di elaborazione per la riduzione del rumore e delle interferenze, sia con Notch da 70dB regolabile anche in larghezza, sia con il TWIN PBT (Doppio Pass Band Tuning) gestito dal DSP che controlla tutto il circuito AGC.
Il Video mostra questa storia dal 1988 ad oggi:  IC-7600 Available end 2008, IC-7200 (2008), IC-7700 (2007), IC-7800 (2003), IC-756Pro Serie (1999), IC-756 (1996), IC-781/780 (1988); > Distortion, Sensitivity, Selectivity, Stability, IP3 and more tecnicals news;

ENG: The Icom.co Japan, now features an Japanese-language Special Movie of the “Truth of Icom HF Transceiver”
Movie: IP3 (3rd order Intercep Point), Internal distorsion reduction, Improved blocking, Roofing Filter Hi-Spec, Icom’s DIGI-SEL, Icom uses a duble conversion system composed of a D-MOS FET 1st mixer and nevly developed image rejection mixer for the 2nd mixer stage. (The image rejection mixer provides a high-fidelity signal to the DSP unit) Multiple AGG Loops, Digital IF filter to adadjust filter shaping (sharp or soft), filter bandwidth, Digital TWIN PBT. (Start IC-781 (1988)  at IC-7600 (2008). IP3 and more tecnicals news!

View or Download the 12-minute Icom Inc.  Movie on Japanese-language; There is a link to the View Streaming and link for Download (89MB .zip) (vedi/view with Windows Media Player Free)

Icom.co Jp: アイコムHF機の真実に迫る
Icom, Icom Inc. and the logo are registered trademarks of Icom Incorporated  (Jp)

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