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A Review of the Bonito 1102S RadioJet 24 bit IF Receiver

Bonito’s Dennis Walter at the Bonito booth in Hara Arena at the 2012 Dayton Hamvention

At the Dayton Hamvention this year, I met Dennis Walter, who is with Bonito, German manufacturer of the 1102S RadioJet. Dennis was kind enough to loan us a radio for review on SWLing.com. I have been evaluating the Bonito 1102S RadioJet over the course of eight weeks and have formed some impressions about its performance. And while I haven’t made any A/B comparisons yet with either the Microtelecom Perseus or the WinRadio Excalibur–both on my review table at the moment–I have taken the time to get to know this lean, high-performance IF receiver.

First impressions

The RadioJet box (left) is about the size of the highly portable Tecsun PL-380 (right)

When I first held the RadioJet, I was amazed at how small and sturdy the unit is. It’s built quite well; I expect you would have difficulty putting a dent in its aluminium body. It has a very small footprint on the desktop and fits very easily in my suitcase. Specifically, the RadioJet box is about the size of the highly portable Tecsun PL-380—in fact, the PL-380 is slightly wider than the RadioJet.

And though I knew about this feature in advance, what really stands out is its lack of dependence upon a power cable or a DC-in jack on the back of the unit.  Indeed, the only two connections are a USB port and a female BNC connector for the antenna. The RadioJet derives its power directly from the USB cable. This is a major plus, providing additional freedom, as there’s no need for an external power supply or “wall-wart” type DC adapter. With the radio and USB cord, you’re ready for radio on-the-go—as I was on my recent DXpedition family vacation, when I reviewed the RadioJet.

Plug and play

Installing the RadioJet is very simple. You simply plug the receiver into your computer via the supplied USB cable, then install the RadioJet software via the supplied installation disc. As far as I know, the RadioJet software only works with Windows PCs. I tested the RadioJet with my Toshiba Satellite 64 bit Intel core i3 laptop computer.

I had no difficulty getting the RadioJet running.  Indeed, it worked after the first software install. In my experience, it was true plug-and-play.

Is the RadioJet an SDR?

To be clear, the RadioJet is technically not an SDR, it is an IF receiver, more like the Ten-Tec RX-320D. I’ve certainly been guilty of calling it an SDR in the past as it’s easily to lump it in the same category. Within this review, I do compare RadioJet features with SDRs currently on the market since it is software (PC) controlled, has many of the same features as an SDR and directly competes with them.

Software and Usability

Unquestionably, the Bonito 1102S RadioJet’s software offers the most flexibility of any Software Defined Radio (SDR) or IF receiver I’ve ever reviewed.

A screen capture from my Toshiba Satellite Windows 7 laptop (click on image to enlarge)

Having used several SDRs and IF receivers–including the Microtelecom Perseus, Ten-Tec RX-320D, RFspace IQ and WinRadio Excalibur—I can state that the basic functions of the RadioJet are comparatively easy to locate.  The graphic user interface (GUI), however, could appear somewhat complicated, particularly if you are new to software based receivers.   While I like options and the ability to customize a user interface to best match my preferences, having a GUI that is both highly-adaptive and full-featured can be a double-edged sword until you become accustomed to it.

On one hand, you can customize the RadioJet GUI more completely than any other SDR I’ve ever used:  you can change the window size, layout, spectrum display, and color palette; you can also load pre-designed screens to help with signal measurement, IF control, and AF control.  Indeed, the RadioJet’s designers have also included a unique “Scanner and Signal Utilities” screen for working with utility reception.

On the other hand, there is a learning curve in both customizing the GUI and familiarizing yourself with the radio’s controls. This is why I wish the RadioJet had a proper owner’s manual. Early in my experience with the unit, while making setting modifications during a broadcast, I found I could lose my place within the control settings or accidently alter a setting that would result in degraded reception (such as the WAV volume, AGC, DSP or attenuator).  I thought that the RadioJet was malfunctioning, only to discover that I had a setting adjusted incorrectly.  Note that Bonito’s online support, however, has been very responsive in helping me when this happens.

The RadioJet GUI is the most flexible and adaptable of any software radio I’ve used

Fortunately, Bonito is fully aware that many listeners could be overwhelmed by the various options the RadioJet offers, and have designed the GUI so that if you minimize the window (as you would any Microsoft Windows “window”), only the basic receiver options will display.

The only major drawback I’ve observed with the RadioJet, as fellow reviewer Fenu mentions in his comprehensive review, is that its software still has a few trouble spots to be ironed out.  This is not surprising, considering that is very new to the market. To be clear, software is a very important part of an SDR or IF receiver’s usability: after all, its interface is software defined. An SDR or IF receiver without the software is merely a small paperweight–but with it, becomes highly functional radio with a performance that can be enhanced with upgrades over time.

The success of the RadioJet over time will be directly tied to the responsiveness of Bonito to customer feedback. Like Fenu, my experience with Bonito is quite encouraging in this regard—Bonito has even provided remote desktop help sessions for individuals, and I can personally vouch that I’ve benefitted from this support. Bonito also closely attends to discussions on the RadioJet Yahoo Group, indicating that the company is listening to their customers. Bonito has been updating the software regularly—in fact, they’ve just added a noise blanker to the software which, I hear, effectively deals with electrical pulse noises like those produced by electric fences.

Tuning around

Though not required, if you don’t already have a mouse with a scrolling wheel, you will want one to tune and adjust the RadioJet. Band-scanning is pretty straightforward and there are a variety of methods to adjust the frequency:

  • Hover your mouse over the tuning knob and click to rotate clockwise or counter-clockwise
  • Hover over the digital frequency display and use the mouse scroll wheel to adjust each digit of the frequency up or down
  • If the display is expanded, there is also a number pad where you can click on each number to adjust
  • In the current revision of the software–much like with the Perseus–you cannot directly key in the frequency with the number pad of your computer

With the scroll wheel of the mouse, you can easily adjust most settings and filter controls of the RadioJet. It acts, in a sense and in most cases, as a proxy for a tangible knob you would have on a traditional radio. I imagine there are other (perhaps even better) peripherals that would work, too.

I do find the controls a bit frustrating to manipulate if you do not have at least a mouse with a scrolling wheel. I did not bring a mouse on my recent DXpedition and later regretted the decision. The track pad on my Toshiba laptop does not offer the accuracy and scrolling features needed to fluidly operate the RadioJet GUI.

Recording

The RadioJet audio recording and playback panel

Unlike a lot of SDRs on the market, the RadioJet does not have the ability to record large chunks of HF spectrum. For example, the WinRadio Excalibur and Microtelecom Perseus can record 2,000 kHz of spectrum; the RadioJet, however, is limited to 24 kHz. I asked Dennis at Bonito about this and he said that when designing the RadioJet the designers focused on the performance of the received signal and the radio’s overall efficiency rather than upon having a wide IQ output.

Bonito is catering to the discriminating DXer who is seeking the highest quality signal upon receiving, even among weak signals, but who is less interested in spectrum recording. Personally, I like to record and archive spectrum, but I do appreciate this focus upon delivering the best possible received signal, even with a very modest computer. Indeed, unlike most other SDRs on the market, the Bonito 1102S RadioJet reportedly works well on Netbooks with Atom processors. I can say that my Intel Core i3 laptop runs the RadioJet beautifully. I do plan to try the RadioJet on my netbook soon, as well.

RX and DX modes

One unique and highly-promoted feature of the Bonito 1102S RadioJet are the RX and DX “Channels” or operating modes.  On the Bonito site, they show an example of a very weak signal showing up on the spectrum display, almost totally hidden in the band noise. When the user switches to the “DX Channel,” however, the noise floor drops and the received signal pops out, and becomes armchair listening.

Here is the video:

I have found that the DX Channel is indeed very effective at pulling a weak signal out of the noise. The RX Channel, on the other hand, does an even better job of receiving stronger broadcasts signals. The channels appropriately balance AF and RF gains along with the raw IQ to deliver the receiver’s very best under prevailing conditions.

The RadioJet RX/DX channel selection panel

I find that I switch between the two channels rather frequently, and tend to do so manually. There is a setting in which the RadioJet will automatically determine what settings should be used to best hear the target broadcast—it switches very quickly between the RX and DX Channels and even makes small adjustments to the AGC and other settings.  Though quite effective, I still prefer to manually adjust these features to enjoy greater control of them.

 

Digital Radio Mondiale (DRM)

This is perhaps one of the most fluid and flawless features of this radio.  Though I have not had an opportunity to record DRM yet, I have decoded several broadcasts with great success (REE, Vatican Radio and RNZI).

In fact, if you are looking for a an excellent DRM receiver, the RadioJet may be your best bet.  Unlike many SDRs on the market, the RadioJet decodes DRM natively:  in other words, you simply tune to a DRM signal and change the mode from AM to DRM. That’s all. Your software already has a built-in, paid-in-full decoder (no need for a costly plugin or DREAM license). It’s the best implementation I’ve ever tried.

Summary

When I begin a radio review, I keep a checklist of pros and cons as I discover them. In this way, I can remember my initial discoveries.

Here’s my list from the Bonito 1102S RadioJet:

The RadioJet derives its power from the supplied USB cable, the only two connections are the USB port and the antenna (BNC)

Pros:

  • Excellent sensitivity and selectivity
  • Low noise floor
  • Excellent DRM implementation
  • Customizable filters—some can actually be hand-drawn with the computer mouse to accomodate received signal conditions
  • Though I haven’t done an A/B comparison with the Perseus yet (coming soon!), but like Fenu, I expect the sensitivity and selectivity to be very similar
  • Operates without a separate, external DC power supply
  • Software and GUI are extremely customizable—the most flexible and resizable I have used (see con)
  • Audio fidelity, once adjusted, is excellent
  • Two modes of listening (RX and DX channels) allow for either manual or automatic settings for strong or weak signals (see con)
  • Technicians and support representatives from Bonito have been responsive to customer requests and feedback
  • Software updates are frequent and occasionally include new features
  • Since the RadioJet doesn’t use or have to process wide IQ, (see con) its 24 kHz bandwidth targets one broadcast and places emphasis on clean RX performance
  • Doesn’t require robust PC processing power, will even run smoothly on a netbook (per manufacturer—though I will test soon)
  • Scroll wheel on a standard PC mouse acts as a nice proxy for the many control knobs on the RadioJet GUI (see con)

The RadioJet software even has a unique map display of broadcasting schedules

Cons:

  • Software has some bugs and is not yet fully mature
  • Software and GUI are so customizable that they reqire a learning curve—could be a negative for SWLs seeking simpler functionality (also see pro)
  • No IQ output like the Perseus, WinRadio and RFspace SDRs, which allows for wide spectrum recordings (also see pro)
  • Software occasionally crashes
  • Sometimes when switching between RX and DX Channels, WAV volume settings are altered and not returned to original settings, resulting in a “splattered” or “hot” audio sound
  • Software controls are frustrating to use without a mouse—or by using a laptop track pad only (see pro)
  • Lack of a proper owner’s manual

Final thoughts

Overall, I like the Bonito RadioJet; I would certainly recommend it for the shortwave radio listener and DXer, especially one who wants:

  • raw performance
  • flexibility
  • portability
  • robust receiver control software package
  • good value for performance

I would also recommend the RadioJet to those who don’t want a receiver to task their computer’s processor excessively.

If you are looking for a mature, simple software defined radio—or if you need wide spectrum recording–you may want to check out a true software defined radio (SDR) from WinRadio, RF Space or Microtelecom.

In my opinion, the only drawback to the RadioJet, as of time of this review publication, is that the control software is not yet refined and still has a few bugs. None of these limitations have affected my ability to use the RadioJet, but they have proved annoying at times.

My impression of Bonito and their staff is that they are trying in earnest to respond to customer feedback and focus on delivering an effective receiver for the DXer and for those wishing for excellent performance on a budget.

If this attentiveness continues, the RadioJet should only improve with time.

The US price tag for the Bonito 1102S RadioJet is $689 through Universal Radio. This is fully $300 less than the Microtelecom Perseus. If you want serious performance, from a lightweight, rugged, flexible software controlled receiver, you should be pleased with the RadioJet.

UPDATE: Want to hear a broadcast recorded on the RadioJet?  Check out my previous post on the final broadcasts of RNW. The RadioJet did an amazing job pulling this station out of the static.

Follow our tag “RadioJet” for updates to this review and future A/B comparisons with other receivers.

Keep in mind…

SWLing Post regulars know that I don’t post highly technical or “laboratory” reviews. Take this review as my experience as an experienced shortwave radio listener, where I focus on usability, receiver quality, and audio fidelity, and provide general operating notes. I also focus on helping consumers make purchase decisions, as I outline the pros and cons of each receiver.  For a more technical review, I would refer you to previously-mentioned Fenu’s review and–potentially upcoming–Rob Sherwood’s receiver performance data.

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Universal Radio has priced the Bonito 1102S RadioJet very competitively

The Bonito 1102S RadioJet - Click to Enlarge

Universal Radio has published the price of the Bonito 1102S RadioJet at $699.95 US and they are taking orders.

Universal’s price is  $300 less than that of the Microtelecom Perseus ($999.95 US) and the $200 less than the WinRadio Excalibur ($899.95 US).

After reading Fernando’s review of the RadioJet–where he compared it to the Perseus–this may be one of the best SDR performers for the price. We will be reviewing the Bonito 1102S RadioJet in the near future as well.

To follow all updates of the Bonito 1102S RadioJet, please follow our tag: RadioJet

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Update: Bonito 1102S RadioJet has FCC approval

Screenshot of the RadioJet GUI - click to enlarge

I just received the word from Dennis at Bonito.

The Bonito 1102S RadioJet SDR (software defined receiver) now has FCC approval.  This means that the RadioJet will be available for purchase in the US.

We will be reviewing the RadioJet in the near future.  I, for one, can’t wait–especially after reading Fenu’s review. If it has Perseus performance at a much lower price point, this could be a very competitive receiver.

Want updates? Follow our tag: RadioJet

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List price of Bonito 1102S RadioJet for US

Universal Radio has published the “List Price” of the Bonito 1102S RadioJet at  $784.00 US.

This could make the RadioJet a very strong competitor to other SDRs on the market in North America. The list price (not necessarily the final price Universal will announce–which could be lower) is  $216 less than that of the Microtelecom Perseus ($999.95 US) and the $116 less than the WinRadio Excalibur ($899.95 US).

After reading Fernando’s review of the RadioJet–where he compared it to the Perseus–this may be one of the best SDR performers for the price. We will be reviewing the Bonito 1102S RadioJet in the near future as well.

To follow all updates of the Bonito 1102S RadioJet, please follow our tag: RadioJet

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Fernando’s review of the Bonito 1102S RadioJet software defined receiver

The Bonito 1102S RadioJet - Click to Enlarge

SWLing Post reader and fellow SW radio reviewer, Fernando, has apprised us of his review of the Bonito 1102S RadioJet. While his site is in German, which we don’t read or speak here, Google Translate gives us English speakers a fair idea of his findings, and Fernando helps us with the rest.

To summarize, his comparison of the Bonito 1102S RadioJet with his Microtelecom Perseus concludes that the two perform well, running about neck-and-neck–in other words, offer almost identical performance characteristics.  There were some differences, though. I outline a few key review points that Fernando was kind enough to clarify for us:

  • The noise floor between the Perseus and RadioJet is more or less the same, in his tests.
  • He finds that the Perseus is slightly more sensitive on higher frequencies (above 22Mhz). This comparison is made with the “DX Channel” on the Bonito 1102S RadioJet (a feature only found on the Radiojet–see note below).
  • Fernando believes the sensitivity and selectivity of both radios to be very similar. He told us that he could not hear a great difference.
  • The Perseus software is, of course, very stable and mature in comparison with that of the new Radiojet. This is quite typical of new SDR products on the market, as it takes time and user feedback to eliminate bugs and quirks. Fernando expresses his confidence, however, that the software engineers at RadioJet will be quick to respond to patches and upgrades.
  • Overall, he believes that RadioJet will be able to provide a very stable product in short order.

Since Fernando has been a beta tester for the Bonito 1102S RadioJet, he’s familiar with the company and their attentiveness to feedback, and he’s impressed.

One feature unique to the RadioJet is the “DX Channel.” You can see this in action in a video the company released last year:  in essence, when activated on a weak signal, the noise floor drops, and the signal seems to pop out of the static. I asked Fernando about this feature and he told me that, when the DX Channel is activated, the software lowers the IP3+ and increases the sensitivity. This is the default channel or mode on the software.

The normal “RX Channel” is used for strong signals and is better for in-band interference. The DX Channel has a higher IP3+. He mentioned that the software can automatically determine which channel should be used, and auto-switches it for the user. Fernando said that this function works quite well.

Like to hear the difference for yourself?  Fernando’s website Fenu-Radio.ch has a page dedicated to audio comparisons between the Perseus and RadioJet. The first 15 seconds of each audio clip feature the Perseus, the second 15 seconds features the RadioJet.  Click here to go to the audio page.

By the way–Fernando’s website is most impressive. He has a long list of receiver reviews, comparisons and audio files. I encourage you to spend some time there, whether or not you read German.

Thanks for sharing your review, Fernando!

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Update: Bonito RadioJet IF-Receiver 1102S

The Bonito RadioJet - Click to Enlarge

An inside scoop just for SWLing Post readers:  We’ve just received some interesting updates about the new Bonito RadioJet IF-Receiver 1102S from German company Bonito. Our contact Dennis, a representative of Bonito, informs us that FCC should be approving the RadioJet within a week, and units will be shipping to retailers about the same time. Naturally, I’m quite eager to review this receiver, as it promises a low noise floor (-137 dBm-!?!) and a sleek, sizable user interface. Pricing seems to be in line with the Perseus and Excalibur for North American buyers.

RadioJet Back

Dennis at Bonito tells us:

[S]ince December we’ve been delivering RadioJets to end customers…

Preordering was amazing in our opinion (370 RadioJets!) and the customers who contacted us are extremely happy with it.

We also have some tests from German magazines and the SDR gurus are delighted with the signal quality.

The real concern with any SDR–especially with a new one–is whether or not the manufacturer will support and upgrade the user interface over time.  After all, an SDR is only as good as your ability to control and use it.  In consideration of this, Dennis volunteers the following:

We have, meanwhile, improved and extended the whole software [package] and put a lot of new features in it. One is a huge frequency list, including transmitting times, and shown [in the display is] a world map [indicating] day and night and moon phases. (See screenshots)

Screenshot 1 - Click To Enlarge

Screenshot 2 - Click to Enlarge

I must say, I love the superimposed broadcaster ID as seen in Screenshot 1 (above). This is a very cool addition, which makes for convenient at-a-glance broadcasting identification. Coincidentally, this should also help users find unscheduled broadcasts such as pirate radio stations, numbers stations, utilities, etc. The map target icons also make it quite easy to identify broadcast sites on the world map (see Screenshot 2).  Again, Dennis:

Top view of RadioJet board (Click to enlarge)

I’ve included an image of the [receiver] board. You see no active parts between the antenna and ADC [analog to digital converter].

Dennis claims that it is this absence of any active components between the antenna and ADC that keep the RadioJet noise floor so remarkably low.

Bonito rep Dennis also voluntarily asked me to post the following to SWLing Post readers:

It would be great if you would send me a small list of things that MUST be in the software. Every comment is welcome.

So if you have a comment or a particular request regarding this software, please leave it in this post or simply contact us–we’ll make sure Bonito receives this informative feedback from you.

Of course, these are early days, but it looks like Bonito has the right focus to create a very competitive and innovative SDR product. This will require more than good engineering, however; it requires excellent support and a user-friendly experience.  Time will tell–and so will our forthcoming review!  We will be reviewing the Bonito RadioJet IF-Receiver 1102S in the near future, comparing it with the Microtelecom Perseus, so check back and follow this tag.

In the meantime, you can check out further screenshots below:

Screenshot 3 - Click to enlarge

Screenshot 4 - Click To Enlarge

Screenshot 5 - Click To Enlarge

Screenshot 6 - Click To Enlarge

Screenshot 7 - Click To Enlarge

Screenshot 8 - Click To Enlarge

Screenshot 9 - Click To Enlarge

Screenshot 10 - Click To Enlarge

Check Universal Radio’s website for Bonito Radiojet IF-Receiver 1102S availability and pricing in the USA.

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The Bonito RadioJet: Out of Germany, a new PC controlled shortwave receiver

The Bonito 1102S RadioJet. (Source: Bonito.net)

I’ve been struggling to keep up with the pace of news during my recent travels, however one relatively new shortwave receiver, the Bonito 1102S RadioJet, has certainly captured my attention. Though still awaiting approval by the FCC in the US, the RadioJet is available for order through the manufacturer in Germany.  Universal Radio will retail the RadioJet for the US market once approved by the FCC.

What could make this radio worth consideration is the potentially low noise floor–evidently the antenna and analog to digital converter have a uniquely direct connection with no active components to add distortion.

The interface (GUI) looks clean and intuitive at first glance. Take a look for yourself in this video demonstration:

We’ve created an entry for the Bonito RadioJet in the SW Radio Index and will update it as information becomes available.

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