Icom IC-7300 A Look Under the Hood Bruce Wampler - WA7EWC The Icom - - PowerPoint PPT Presentation

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Icom IC-7300 A Look Under the Hood Bruce Wampler - WA7EWC The Icom - - PowerPoint PPT Presentation

Aug 23, 2023 133 likes •372 views

Icom IC-7300 A Look Under the Hood Bruce Wampler - WA7EWC The Icom IC-7300 is a brand new (April 2016), Direct Conversion, 100% SDR. It is the first SDR amateur radio transceiver by one of the major Japanese companies. Is the IC-7300

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A Look Under the Hood Bruce Wampler - WA7EWC

Icom IC-7300

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The Icom IC-7300 is a brand new (April 2016), Direct Conversion, 100% SDR. It is the first SDR amateur radio transceiver by one of the “major” Japanese companies.

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$1,500 “entry level” Transceiver changes what “entry level” means. 160m to 6m plus full general coverage receiver Exceptional receiver - RMDR@2K: 103dB RF and Audio Spectrum scopes Built-in Tuner Built-in USB transceiver control and audio Full remote control capability Direct conversion SDR

Is the IC-7300 revolutionary?

YES! This changes everything.

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From now on, an entry level base station transceiver will have:

Receiver with 2kHz RMDR of at least 100dB Real time Spectrum scope USB control and audio Antenna Tuner SDR / DSP Digital features: audio recording, predefined messages Highly customizable filters

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2kHz RMDR Scope Tuner Price Icom IC-7300 (sdr) 103 X X 1,500 Icom IC-7100 (mobile) 84 1,100 Icom IC-7600 86 X X 3,000 Icom IC-7650 (speculation) 115 X X 3,000 Icom IC-7851 116 X X 13,000 Flex 6300 (sdr, w/ Maestro) 116 X X 3,650 Flex 6700 (sdr, w/ Maestro) 116 X X 8,500 Kenwood TS-590SG 94 X 1,400 Kenwood TS-990S 87 X X 6,800 Yaesu FT-991 75 X X 1,300 Yaesu FTDX-3000 82 X X 2,700 Yaesu FTDX-5000 104 X X 5,000 Yaesu FTDX-9000MP 92 X X 9,000 Elecraft K3S (sdr - base station) 114 +800 +650 2,650

Comparison of some currently available transceivers

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Reciprocal Mixing Dynamic Range

ARRL Test Labs: “Reciprocal Mixing must be seriously considered while evaluating the overall performance of a

  • receiver. In fact, it is probably the most significant figure in

receiver performance!” http://www.arrl.org/forum/topics/view/177

RMDR is a measure of how well the receiver blocks adjacent signals.

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Why does SDR make such a difference?

Superheterodyne + DSP vs. SDR

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Why does SDR make such a difference?

Superheterodyne Analog design for RF signal Multiple IF stages with complex filtering issues Added noise Analog filters SDR Can be all digital (except RF pre-amps/ bandpass) Current A/Ds and D/As work well, not expensive Digital domain allows use of FPGAs and/or DSPs for mod/demod and customizable “perfect” software filters

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Output power: 100W (25W AM) TX Frequencies: 160m - 6m (SSB, CW, RTTY, AM, FM) Antenna Tuner: Matches up to 10:1 SWR RX Frequencies: 0.030-74.800 Receiver type: RF direct sampling system Color touch screen: 4.3” color TFT touch LCD Spectrum Scope: Real-Time FFT RF/Audio scope Built-in automatic antenna tuner SD memory card slot for saving data, audio, screen shots Cooling fan system Multi-function meter CW functions: full break-in, CW reverse, CW auto tuning Customizable filter profiles Easy to use settings with buttons and touch screen Requires 13.8v, 22 amp DC power

Basic IC-7300 Features

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IC-7300 Features: Spectrum Scope

Spectrum Scope: Large Size Spectrum Scope: Small Size

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Mystery: What is This????

RFI: Probably my heating boiler

Note: Center View vs Fixed on previous slide.

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IC-7300: Audio Scope

CW Audio Spectrum

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Audio Scope

LSB Audio PSK31 Audio Signal

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IC-7300: Frequency/Band Selection

Direct selection by touching Spectrum Scope. Band Selection by touching first frequency diet, then selecting band. Can also directly enter frequency.

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IC-7300: Auto Antenna Tuner

Will match up to 3:1 SWR at full power Up to 10:1 SWR at reduced power Remembers up to 100 frequency matches

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IC-7300: Display & Settings

Combination of physical buttons and touch screen buttons to select displays and change settings. Many options, most obvious in context. Long-press used to open settings for a button.

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IC-7300: Example - setting a filter

Can set passband filters using Multi knob.

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IC-7300: Observations The Good:

  • Receiver Really Good
  • Noise Reduction Amazing
  • Spectrum Scope: Wow
  • Control Interface: A-
  • Mode Filters: Really work
  • Good reports of TX audio
  • USB control /audio
  • Antenna Tuner
  • Cost/feature ratio: A+

The Bad:

  • Only one antenna connector - no

separate RX antenna

  • Memo interface awful
  • Fixed Scope only has 3 edge settings
  • Built-in speaker mediocre
  • IP+ feature apparently not yet right
  • You need to have this radio!
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WA7EWC

WA7EWC - Complete Station

Where’s the tuner, the audio interface box, amplifier, DSP speaker, keyer, and all that other stuff? Don’t need ‘em.

Outside: Hustler 6BTV+17m Vertical with 32 radials

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IC-7300: Technical Overview

FPGA

Altera EP4CE55F23I7N Cyclone IV E 55856 Logic elements 200 MHz

DSP

TI TMS320C6745 375MHz

TX D/A

Intersil ISL5857IAZ High Speed D/A 12 Bit 260 MSPS

RX A/D

Linear LTC2208-14

14Bit 130MSPS

Main CPU

Renesas R7S721000VCFP

32 Bit, 1M Ram 400MHz clock

Plus display CPU and audio A/Ds and D/As

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IC-7300: Main Board

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RF

Speaker

Microphone

CPU

DSP

FPGA

RX A/D TX D/A

To LCD

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The End