IC-7610_Technical_report_Vol1_2017.pdf

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1、i7610 Technical Report Volume 1 Outstanding HF Experience Right Here Icoms mid class HF transceivers evolved especially with the IC-756, IC- 756PRO and IC-7600, and were technology leaders in amateur radio. Even the IC-7610 inherits the genealogy of Icoms mid class transceivers, but its development

2、concept, circuitry, adopted devices, and performance are innovative. The IC-7610 has superior performance and features far beyond the perception of current mid class HF transceivers. The performance and features are realized by fusing the proficient digital and analog technologies of the successive

3、flag ship transceivers, and refined RF direct sampling technologies developed in the IC-7300. The Reciprocal Mixing Dynamic Range (RMDR) characteristics show nearby signal rejection receiver performance, and the IC-7610s RMDR is 110 dB at 2 kHz separation (Receive frequency: 14.2 MHz, Mode: CW, BW:

4、500 Hz). This is an incredible performance for a mid-class transceiver, and it is close to that of our flagship IC-7851. The IC-7610 also has several flagship grade features, such as dual, identical, independent receivers and dual independent DIGI-SEL units for the Main and Sub bands. In addition, d

5、ual high-resolution and high sweep speed real-time spectrum scopes are built in. The IC-7610 has a high resolution 7-inch wide (diagonal) touch screen LCD, and a server PC function for remote shack operation. In addition, a variety of external connectors, such as an external display connector, LAN p

6、ort, USB ports for remote operation, are built into the IC-7610. Totally, the IC-7610 gives you not only flagship grade performance and features, but also flagship grade operability and scalability. You can feel the flagship grade performance visually, audibly, and tactically. And you will have an a

7、dvantage in contests and DX hunting. Profjle TRADEMARKS Icom, Icom Inc. and the Icom logo are registered trademarks of Icom Incorporated (Japan) in Japan, the United States, the United Kingdom, Germany, France, Spain, Russia, Australia, New Zealand and/or other countries. Microsoft and Windows are r

8、egistered trademarks or trademarks of Microsoft Corporation in the United States and/or other countries. All other products or brands are registered trademarks or trademarks of their respective holders. 2017 Icom Inc. Table of contents Section 01 Panel Description 0102 Section 02 Major Features 0307

9、 Designs and technologies inherited from the IC-7851 03 Two completely independent receivers with identical performance 03 DUALWATCH operation on different bands and in different modes 03 Independent DIGI-SEL (Preselector) circuits for the Main and Sub bands 03 Benefits of the latest digital technol

10、ogies 04 RF direct sampling system 04 Top class RMDR 110 dB 04 Excellent transmit phase noise characteristics 04 Further evolution of the spectrum scope 05 Dual spectrum scopes with amazing dynamic range 05 High resolution waterfall 05 Audio scope for flexible utilization 05 Various functions and co

11、nnectors built in 06 Large 7-inch touch panel LCD 06 Easy operation with the Multi-dial 06 Two USB connectors on the front panel 06 Built-in SD card slot 06 TX voice digital voice memory 06 Simple remote operation with the server PC function and LAN port 07 Two USB ports for external control 07 Adva

12、nced operations are possible with a variety of I/O terminals 07 External display terminal built in 07 BNC connectors for the RX antenna lines 07 Reference signal input terminal built in 07 Two independent external speaker jacks 07 Section 03 Inside Views 0809 Section 04 Upgrade Options 1013 Section

13、05 Specifications 1415 01 Section 01 Panel Description Front panel High resolution 7-inch (800480) wide-type touch screen LCD panelMulti-dial for simple operation Enhanced voice recorder function.SD card slot Two USB ports for simultaneous connection of a PC keyboard and a mouse. The optional RC-28

14、can also be connected here and used as a Sub band dial. 02 Section 01 Panel Description Rear panel RX-ANT IN/OUT BNC connectors for simple external preamplifier or filter connection. External reference signal input BNC connector. LAN port for remote peration. *RS-BA1s server PC function is included.

15、 Two USB ports for remote control through a PC. DVI-D external display connector. Independent external speaker jacks for the Main and Sub bands. 03 Section 02 Major Features ANT1ANT2 SPLITTER DIGISEL MAIN DIGISEL SUB 1.8MHz INT SP BPF BPF BPF 3.5MHz 50MHz A/D AMP D/A AF AMP D/A AF AMP 1.8MHz BPF BPF

16、 BPF 3.5MHz 50MHz A/D AMP FPGA Main band Sub band Designs and technologies inherited from the IC-7851 Two completely independent receivers with identical performance The IC-7610 has dual, completely independent, equally high performance receiver circuits for the Main and Sub bands. The circuits are

17、in the stages from the antenna through the Field Programmable Gate Array, (FPGA), as illustrated in Figure 02-01 below. The concept of the IC-7610 is the same as our flagship model IC-7851, even though there is a difference in the RF direct sampling system and the double superheterodyne system. Of c

18、ourse the receiver circuits are designed with enough isolation to not have any effect on each other. The received signal is demodulated in the FPGA. However, the demodulation is done in independent demodulators inside the FPGA. The AF amplifier stages are also independent for the Main and Sub bands.

19、 The IC-7610 has two antenna connectors. The DUALWATCH operation is possible by selecting different frequency coverage antennas to receive signals, receiving a signal with the diversity method, and connecting horizontal and vertical antennas. DUALWATCH operation on different bands and in different m

20、odes In the IC-7600, the same receiver circuits are used in both the Main and Sub bands, except the mixer circuit. Therefore, DUALWATCH operation has some limitations in the same band and mode. However, the IC-7610 enables DUALWATCH operation in different bands and modes, because completely independ

21、ent and identical performance receiver circuits are employed. This high performance flagship grade DUALWATCH function enables searching for a signal on the Sub band, while communicating on the Main band. Independent DIGI-SEL (Preselector) circuits for the Main and Sub bands The IC-7610 is the first

22、in the mid class HF amateur radio market to employ automatic preselector circuits as standard. A preselector is a type of RF filter with sharp skirt characteristics. Icom decided that the preselector is a necessary and useful tool in a mid class transceiver, even though up until now, the preselector

23、 had only been incorporated into our flagship grade transceivers. The IC-7610s independent preselector circuits are built into both the Main and Sub bands. Figure 02-02 Automatic Preselector Figure 02-01 Receiver Overview 04 Section 02 Major Features Benefits of the latest digital technologies RF di

24、rect sampling system The RF direct sampling system is employed in the IC-7300, ahead of its competitors. The RF direct sampling system has been improved and is used in the IC-7610. The RF direct sampling system directly converts the received RF signals into digital signals, and batch complex signal

25、processing is done in the Field Programmable Gate Array (FPGA). There is no nonlinear distortion, which occurs in a mixer circuit of the superheterodyne system receiver, because there is no analog mixer. In the RF direct sampling system, received signal detection and demodulation, and transmit signa

26、ls are directly generated in the FPGA. So the purity of the signal is very high, and its a large contributor to the excellent characteristics in transmit and receive. Top class RMDR 110 dB* The Reciprocal Mixing Dynamic Range (RMDR) is used as one of the standards representing receiver performance.

27、The RMDR of the IC-7610 is 110 dB*, approaching the 116 dB* of our IC-7851 flagship model. The RMDR is a standard that shows how much the receive sensitivity deteriorates due to blocking from strong adjacent signals. A larger RMDR value means that the blocking effect is less. In general, a lower LO

28、phase noise provides better RMDR characteristics. It is an outstanding improvement of approximately 30 dB in the IC-7610, as the IC-7600 RMDR is approximately 80 dB. You can clearly see this difference, not only in a contest, but also in any operating situation. *Sample configuration ( 2 kHz offset,

29、 Rx frequency: 14.200 MHz, Mode: CW, BW: 500 Hz) 70 80 90 100 110 120 130 30101 RMDR (dB) Frequency offset (kHz) IC-7610 IC-7300 IC-7600 Figure 02-03 RMDR characteristics comparison Excellent transmit phase noise characteristics A transmit signal is directly generated by the FPGA, as previously desc

30、ribed. So, a signal is not generated by mixing several LO signals, like in the superheterodyne system. The purity of a transmit signal, that is generated at the Digital Analog Converter (DAC) using the Digital Up Conversion (DUC) method is extremely high, and this provides improved transmit phase no

31、ise characteristics. 100 Hz 160 150 140 130 120 110 100 90 80 70 1 kHz1 MHz10 kHz Frequency Offset Phase noise characteristics (dBc/Hz) 100 kHz IC-7600 IC-7300 IC-7610 Figure 02-04 TX phase noise characteristics comparison (TX Freq.: 14.200 MHz) 05 Section 02 Major Features Further evolution of the

32、spectrum scope Dual spectrum scopes with amazing dynamic range The high-spec spectrum scope that is in our flagship IC- 7851, and its know-how, are also built into the IC-7300. The spectrum scope is further improved and incorporated in the IC-7610. The excellent 100 dB dynamic range of the scope dis

33、play is achieved by cooperative processing with the FPGA and CPU software. Off course, the sweep speed and resolution are also improved to the level of our flagship model. This spectrum scope can also be used during DUALWATCH operation to show both Main and Sub bands conditions, and its performance

34、is the same in single band operation. IC-7610IC-7600 Span5 kHz1000 kHz5 kHz500 kHz Resolution*1Minimum 1 dot*2Minimum 20 dot*3 Sweep speed29.3 sweep/sec.*44 sweep/sec*4 Dynamic range100 dB70 dB Noise floor30 dB19 dB Table 02-01 Spectrum scope comparison *1Number of dots when receiving a single carri

35、er with 60 dB bandwidth *2Approximately: SPAN=20 kHz, SPEED=SLOW, RBW=MID *3Approximately: SPAN=500 kHz, SPEED=SLOW *4Approximately: SPAN=20 kHz, SPEED=FAST High resolution waterfall The waterfall can display received signal history in moving time, and shows weak signals that are difficult to discri

36、minate with only the spectrum scope. The waterfall is simultaneously displayed with the spectrum scope, so you can easily see the details of the band condition and clear frequencies. When you select the expanded screen, a longer history can be displayed on the waterfall. The waterfall is one of the

37、features that increases the possibility to communicate using the optimized IC-7610 receiver performance, without missing weak signals from DX stations. Audio scope for flexible utilization The audio scope displays an FFT scope and an oscilloscope, for both transmit and receive audio. The received si

38、gnals modulation characteristics, filter width and notch characteristics, and the microphone compression effect of your transmit audio can be displayed. While receiving, audio of either the Main or Sub band can be displayed. 06 Section 02 Major Features Various functions and connectors built in Larg

39、e 7-inch touch panel LCD The IC-7610 has a large and wide 7-inch LCD. It is 120% larger compared with the one for the previous model, the IC- 7600. The display resolution also is much better, increased from 400 240 pixels to 800 480 pixels. With the tremendous increase in display size and resolution

40、, the LCD can display a variety of information on the transceivers condition. The spectrum scope on the real time display gives you a higher accuracy of the band conditions. To get an idea of the spectrum scope quality, for example, when you look at a signal spectrum on the previous LCD, you may see

41、 it like an unfocused mountain. However, when you look at it, you can clearly find that it is a large number of signals of stations calling in a pile up. IC-7600 400240 pixels 5.8 inch IC-7610 800480 pixels 7 inch Fig 02-05 Comparison of LCDs The LCD built into the IC-7610 is also a touch screen. Th

42、is gives you intuitively action under various operations so that it makes settings easier. Easy operation with the Multi-dial The IC-7610 has the unique Multi-dial, the same as the one on the popular IC-7300. This dial makes not only a simple panel layout, without installing individual function knob

43、s, but also makes the operation easier with the addition of the touch operation. TX output power Microphone gain Monitor gain DIGI-SEL NOTCH NOTCH width NB level NB depth NB width NR level APF frequency APF width APF AF level DRIVE gain You can also change the settings of the following functions ass

44、igned to the multi-function keys with the Multi-dial. VOX gain ANTI VOX gain VOX delay time VOX voice delay time COMP level TX bandwidth Attenuation level Break-in delay time Two USB connectors on the front panel Two USB connectors are basically to connect a keyboard for PSK or RTTY operation. In ad

45、dition, the connectors on the IC-7610 can be used for mouse operations on the spectrum scope. The mouse operation enables you to quickly select a signal on the spectrum scope. For this reason, two USB connectors enable you to use to simultaneously use a keyboard and a mouse. You can also connect an

46、optional RC-28 Remote encoder to this connector and use it as your sub-dial. When you insert a USB memory stick to a connector, you can save the memory contents, various transceiver settings, or screen capture data of the IC-7610. Built-in SD card slot You can save not only memory channel contents a

47、nd a wide variety of transceiver settings, but also a QSO log for RTTY or PSK operations, and screen capture data, on the SD card memory. For example, when your group participates to a contest as a multi-operator class, an individual operator can quickly start QSOing with their favorite transceiver

48、settings saved on the SD card memory, if each operator saves their favorite transceiver settings in advance. You do not have to waste time manually resetting the transceiver each time the operator changes. It is convenient to reuse the QSO record data, QSO log, or the screen capture, if you store th

49、e data on your PC. TX voice digital voice memory The recording time limited to a maximum 30 seconds for only the receive signal has been improved to record unlimited transmit voice as well as receive voice*. In addition, the number of voice memory channel is increased from 4 channels to 8 channels. Recording time is also increased from 99 seconds to 200 seconds in total for the 8 channels. * If the voice data file reaches 2 GB, the transceiver automatically makes a new file on the SD card to continue recording. 07 Section 02 M