Archivi categoria: IC-7851

Complete IC-7851 test report now on-line by Adam, VA7OJ/AB4OJ

IC-7851 HF/50MHz transceiver with new features such as a 1.2kHz optimized roofing filter, (IC-7850 is a special 50th years Icom anniversary model of 150 units only on the world) Complete Test Report by Adam, VA7OJ/AB4OJ is now on-line on his web-site (un’altro eccellente lavoro di Adam, VA7OJ …  tnx! grazie)

VA7OJ-photoThe Test Report (download the large pdf, link below) are the results obtained from lab tests which the author conducted on Icom IC-7851 S/N 02001019, kindly loaned by Allan, VE7SZ. The installed firmware version were V1.01 for the receiver test and V1.11 for the trasmitter tests. The baseline configuration for all receiver test was MAIN Receiver, NR/NB/ATT/Notch off, AGC Slow.
Lonk to: Download Complete IC-7851 Test Report VA7OJ 

Display-Filter-setup

Ic-7851 (or IC-7850) in HF/50MHz operation with new features such as a 1.2kHz optimized roofing filter to improve in-band  adjacent signal performance.

IC-7851_BPF-Roofing-Mixers

The IC-7851 employs a Direct Digital Oscillator (DDS) with a voltage controlled “SAW” Oscillator (VCSO). This new 1st LO Icom design sets a new benchmark for phase noise with -150dBc/Hz at 10kHz offset (-140dBc/Hz at 1kHz offset) and two receivers (Main/Sub) in up-conversion design.

[Note] – Detailed specifications: please see the official sources – All specifications are subject to change without notice – All trademarks belong to their respective holders.- This page is just a non-official overview, where no one should draw any conclusions – All images and versions above is for illustration only. (tnx).

RS-BA1 Ver.1.80 Enanced Functions and Features Icom Update 2015/07/17

RS-BA1 IP Remote Control Software Icom Update Ver. 1.80, Enhanced Functions and Features – Now the high- resolution spectrum scope with waterfall function can be observed on the RS-BA1 (1.80) for a single band on only the IC-7850 and IC-7851 – You must have a previous version of the RS-BA1 software installed BEFORE you can update to version 1.80.
RS-BA!_180-slider

In addition to the conventional tuning knob controls, some items can be adjusted with slider controls (see pictur above) The slider controls provide visual and fine adjustment within the the function’s range.

RS-BA1_180-conv-knob

The background color of the remote controller screen has been changed from gray to black.  Its muted black background and one-colored icons provide better visibility. [Note] When you use the RS-BA1 with a USB 3.0 device, you must use a USB 3.0 drive.

Link to: Icom RS-BA1 Official News Release 16/7/2015 (Pdf)

italiano La Ver. 1.80 è compatibile con IC-7850 e 7851 Firmware V1.10, e qui offre una nuova importante funzione per un analizzatore di spettro e waterfall visibile a distanza nella console del PC di controllo remoto (client) (solo per una singola banda) – Icom assicura che è compatibile, solo per il resto, con IC-7700 V.2.00; IC-7800 V3.10, IC-7600 V2.00 e IC-7100 V.1.10 (e i loro successori) – Si scarica da Icom Global e funziona solo per chi ha già installato una delle versioni precedenti di RS-BA1, che si acquista con un codice riservato. (info e dati su Icom o su importatore Icom in Italia)

Thanks to the Internet, hams !!! now have the ability to remotely operate any station at any distance – all without the complication and limitation of RF linking or a big anetnna farms, hi! – Maybe you have a well-equipped home station and you’d like to share your good fortune with some of your friends via overIP ADSL Internet. Or, perhaps you are a ham living under onerous restrictions and you’d like to establish a remote station so that you can finally get on the air!

IC-7200-manpack

This has created a boon in remote station control, making it possible for hams to continue enjoying their hobby regardless of where they live.  Among professionals this is known as Radio over IP or RoIP. — (IC-7200 only for vision!)

[Note] – Detailed specifications: please see the official sources – All specifications are subject to change without notice – All trademarks belong to their respective holders.- This page is just a non-official overview, where no one should draw any conclusions – All images and versions above is for illustration only (tnx).

IC-7851vs IC-7800 Phase Noise & RMDR -Icom videos

Icom IC-7851 vs IC-7800 upgrade modelv.3.00 Phase Noise Characteristics and RMDR (Reciprocal Mixing Dinamic Range) Characteristics in Receive Mode, data and pictures taken by videos of Icom Japan (see info and… lincks below).

Icom IC-7800, IC-7700, IC-7600 and IC-7100 Upgrade 21/5/2015 – New CI-V commands for External Antenna Controller & Logging Software and Other Features  – (Linck to: Icom New Release ENG .pdf)

IC-7800-IC-7851

Phase Noise Characteristics in Receive Mode:
Measuring conditions: Receiving Frquency 14.200 MHz, Mode CW, 1st LO frequency 78.655 MHz (1st IF 64.455 MHz Supereterodina up-convertion type)
The IC-7851 employs a new Direct Digital Synthesizer (DDS) along with a Phase Locked Oscillator for the LO – ICOM writes: breaking the boundaries of traditional designs.

phase-noise-002

IC-7851 v IC-7800 ver. 3.00 the RMDR Characteristics
Measuring conditions:  BW 250 Hz,  Roofing Filter 15 kHz!
See the video below: 1st step: a weak CW signal is received, 2nd: a strong signal is receiver on the same frequency, 3td step: move generator distance from center frequency: 100Hz / 200Hz/… 2kHz / 10kHz etc. (the CW signal cannot be eard or be clearly eard again) …What a difference. Impressive! (…thanks to jboyd00 for the his many videos)

Icom’s engineers focused on a new Local Oscillator (LO) in the IC-7851′ that drastically reduces the phase noise. As a result of this design, the purity of the LO achieves a Reciprocal Mixing Dynamic Range (RMDR) of 110dB!

Icom IC-7851/7800 LO C/N Characteristics Comparison
Measuring conditions: Receiveng fre 14.200 MHz, Mode CW, Center at 1st LO fre 78.655 MHz, SPAN 20 kHz, RBW 30 Hz, VBW 10Hz (Att 30 dB)

LocalOsc-C-N

Icom IC-7851 Band Scope Dual Band Display Left / Right – Dual Watch Receiver, Dual scope with waterfall horizontally aligned – (Dual scope vertical aligned is available by setting).

[Note] – Detailed specifications: please see the official sources – All specifications are subject to change without notice – All trademarks belong to their respective holders.- This page is just a non-official overview, where no one should draw any conclusions – All images and versions above is for illustration only. (tnx)

IC-7850 Special Edition & IC-7851 flagship machines impressive 110dB RMDR

IC-7851 HF 50MHz Transceiver, the series-production version of the IC-7850 Special Edition which offers a number of improvements over the IC-7800. – The two transceivers utilizes a newly developed 1.2kHz “Optimum” Roofing Filter operating at 64MHz (1st IF). Automatic or manual adjustment is possible of this Roofing Filter! – See the IC-7850 Video by IV3YER, Luigi, and download the new User Manual “ENG” Version, by link below.

Adjustvalue-1-2-roofing
On the 7850 & 7851 adjust appropriate value 1.2 roofing so that you can easily heard siganal

Spectrum scope (improvement): Span Width 5 – 1000kHz – Sweep Speed 29.3 samples/Sec (SPAN=Less than 20kHz, Speed=Fast) – Imput Dinamic Tange 116dB (SPAN=5kHz, Speed=Slow) – Max Sensitivity -39dBu (5kHz/Slow).

IC-7851_BPF-&-RMDR
Improvements in RMDR (Reciprocal Mixing Dynamic Range) (data from Icom broshure)

RMDR a spaziatura di 1kHz su frequenza di ricezione: 14.2 MHz, MODE: CW, IF BW: 500Hz – (Per IC-7800: roofing di 3 kHz, per IC-7851: “Optimum” roofing di 1,2 kHz)
Icom back now to use a Direct Digital Synthesizer (DDS) along with a Phase Locked Oscillator for the IC-7851’s Local Oscillator (LO) as did in IC-7850’s, will become the new benchmark for Phase Noise with –150dBc/Hz at 10kHz offset and –140dBc/Hz even at 1kHz offset. (… see broshure)

Icom torna ora ad utilizzare un Direct Digital Synthesizer (DDS), insieme ad un Oscillatore ad aggancio di fase per il nuovo Local Oscillator (LO) dell’IC-7851. (vedere dati Icom)

IV3YER, Luigi ha ricevuto l’IC-7850! qui un suo bel video

Link to: Download the new IC-7850 User Manual (ENG pdf)

[Note] – Detailed specifications: please see the official sources – All specifications are subject to change without notice – All trademarks belong to their respective holders.- This page is just a non-official overview, where no one should draw any conclusions – All images and versions above is for illustration only. (tnx)