Posts Tagged ‘ClearStream Micron XG’

Once More, Back to the – Window??

Since I launched this Web site ten years ago, I’ve conducted numerous tests of outdoor and indoor TV antennas to see which ones really performed, and which ones were just “aluminum snake oil.” The problem with these tests is that, as soon as I complete one and write it up, I hear from yet another company who missed the boat and wants their time in the sun.

That’s the motivation for this round of tests, which included some previously-tested models and a few newcomers. It’s taken me a few months to schedule this test and round up all of the review models, but the good news is that every one of these antennas is currently offered for sale; some from multiple online retail outlets.

WHY INDOOR TV?

If you subscribe to pay TV services (as I do), you’ve surely noticed two things. (1) The monthly cost of your channel services has gone up over the past decade at a rate far in excess of ordinary inflation, and (2) you probably don’t watch more than 10 to 15 channels anyway on a regular basis.

Now, couple those observations with the expanding universe of Web-based (“over the top”) video channels, including the ever-popular YouTube, Hulu and Hulu Plus, Netflix, Vudu, Amazon Prime, and assorted network-based streaming sites. Add a Roku box, Apple TV, Boxee, or any of a number of OTT receiving solutions; drop the TV channel bundle from your pay TV subscription, and you’ve probably cut your monthly cost by 50%. (This assumes you’re keeping broadband service.)

Good thing I don't do this on a regular basis. They'd never get any work done!

Good thing for the gang at Turner Engineering that I don’t test indoor antennas on a regular basis. They’d never get any work done!

 

All well and good, except that streaming video services are very much dependent on available bandwidth. Watching Modern Family or The Avengers at 2 PM when Internet traffic is light is a completely different experience at 10 PM, when it seems that everyone and their brother is hogging bandwidth.

While there’s not much you or I can do about that problem (except perhaps subscribe to FiOS), you can watch HD broadcast network channels for free all over the U.S.A. And if you live near an urban area, you may have multiple channels you can pull in, using that little “F” connector on the back of your LCD or plasma flat screen.

 

The

The “mighty mite” – a Radio Shack $4 UHF bow tie.

NorthVu's NV20 Pro firmly attached (we hoped) to the window. Don't try this at home...

NorthVu’s NV20 Pro, firmly attached (we hoped) to the window. Don’t try this at home…

 

All you need to watch these channels is some sort of antenna. While outdoor antennas always work best, you may live in an apartment or condo where going that route is problematic for cosmetic or legal reasons (even though you do have the right to install an outdoor antenna on property that is yours exclusively, but I won’t get into that now).

The fact is; indoor TV reception has actually gotten easier and better. Yes, I remember the early days of digital TV reception, which involved more luck and prayer than anything else. But we’ve come way past those trial-and-error exercises, and it’s now much easier to pull in local digital TV signals indoors.

All you need is a TV antenna that meets the following criteria: It is resonant or close to resonant at the desired frequencies of reception; can be installed easily on a wall, window, or some other surface suitable for mounting, and is a true plug-and-play design. You just screw on the antenna cable to your TV, go into the appropriate set-up and channel menus, and scan for active channels.

 

It's a little bit easier to attach Winegard's FlatWave with masking tape...

It’s a little bit easier to attach Winegard’s FlatWave with masking tape…

...as it is to attach the Mohu Leaf. Maybe transparent tape would look nicer?

…as it is to attach the Mohu Leaf. Maybe transparent tape would look nicer?

 

ANYTHING GOOD ON TONIGHT?

If you haven’t tried indoor TV reception yet, you may be surprised just how many channels you can pull in. For many folks living in the Los Angeles basin who have a clear shot toward Mt. Wilson, that could mean as many as 27 major DTV channels with over 130 total sub-channels of programming. Heck, that’s a mini cable system into itself!

I live in the Philadelphia metro market, and can consistently receive 15 major DTV channels with over 30 sub-channels of programming. That’s using a modest dual-band yagi mounted at the base of my chimney, along with a similar antenna installed in my attic. And my dual-band UHF/VHF yagi antennas that sit atop a rotor and 5’ of mast on my roof can pull in another 8-10 DTV stations from New York City, which is about 65 miles distant.

These antenna systems supplement my Comcast cable service, which was cut off during Hurricane Sandy for the better part of a week by a 100-year-old oak tree that chopped the cable and telephone lines in half. Using an inverter (since replaced by a generator), I could still watch local news and weather from all of the locations just mentioned.

I’m a little too far away from the Philly TV towers in Roxborough to depend on indoor antennas, which is why I went the rooftop/attic route. But your location may be closer; in which case one of the models tested in this review could be right for you.

Here's the Leaf Ultimate with inline preamp (near bottom of photo) percolating nicely.

Here’s the Leaf Ultimate with inline preamp (near bottom of photo) percolating nicely.

Yes, we actually got a ClearStream Micron XG to stay attached to the test window! (Special formulation for the masking tape?)

Yes, we actually got a ClearStream Micron XG to stay attached to the test window! (Special formulation for the masking tape?)

 

As a general rule of thumb, homes and apartments as far away as ten miles from a TV station should be able to pull in the signal with an unamplified antenna. If the TV tower is located at a high altitude, as is the case in Los Angeles, Phoenix, Las Vegas, and Portland (mountains) and New York City and Chicago (skyscrapers), that indoor reception distance can increase by 50% or more.

However, there are locations where indoor DTV reception is borderline reliable or problematic. In those cases, an amplified antenna may be a better choice, as digital signals require a minimum threshold above background noise to be received correctly. For the ATSC system used in this country, the “laboratory” threshold is about 15 dB. In real life with signal echoes and fading, it’s more like 20 dB.

There are caveats with amplified antennas. First, not all amplifiers are created equal! Your particular amplifier may have lots of gain, but strong, nearby out-of-band signals can overload it and create more problems than it is fixing.

Second, amplifiers are noisy, and some more noisy than others. It does you no good to add an amplifier if it increases background noise (or as some call it, the noise floor) along with the signal. So a poorly-designed amplifier can actually make difficult TV reception worse.

Here's what the UHF TV spectrum looks like on the bow tie antenna...

Here’s what the UHF TV spectrum looks like on the bow tie antenna…

...and here's what it looks like on the NorthVu NV20 Pro.

…and here’s what it looks like on the NorthVu NV20 Pro. RF carriers from channels 18, 29, and 51 are anywhere from 3 dB to 9 dB weaker than on the bow tie, while channels 33 and 40 are barely there.

 

THE COMPETITORS – PASSIVE DIVISION

I selected nine different antennas for this latest round. Five were unamplified, and four had some sort of internal or external amplification. One of the amplified antennas (Mohu’s Sky) is actually intended for outdoor use, but I figured I’d see just how well it performed by a window anyway. (The Sky will be part of an outdoor antenna test soon.)

To kick things off, I needed a reference indoor antenna. What better choice than the classic UHF bow tie, which Radio Shack used to sell for all of $4.00? Although The Shack has since dropped this antenna from its catalog, you can still find them online. Summit Source has one made by Steren for all of $2.49.

Next up is the NorthVu NV20 Pro, a VHF/UHF panel antenna that claims to use a fractal-based design to improve resonance and performance. NorthVu is a Canadian company and its Web site promotes the use of free digital TV to cut costs of cable. A number of retailers carry it (including Amazon) and it will set you back about $60, plus shipping.

Batting in the #3 spot is the WallTenna, which I’ve tested previously. This flexible, super-flat antenna is intended for UHF reception only, although it might pull in VHF stations if the transmitter is close by.  At present, WallTenna is sold direct through the company’s Web site for $35.

Winegard’s FlatWave flexible panel antenna was another solid performer from previous tests, so it deserved another go-around. You can find it at numerous online sites and also in Costco, but prices are all over the place, ranging from $20 to $36. Shop carefully!

No test of indoor antennas would be complete without Greenwave Scientific’s Mohu Leaf, a strong performer in previous antenna tests. You can find it at numerous online and brick-and-mortar retailers (Sears, B&H, Amazon, Sam’s Club, J&R) for$40. You can also buy it direct from Greenwave.

 

Here's what WMBC-18 looks like with the WallTenna.

Here’s what WMBC-18 looks like with the WallTenna.

And here's what WMBC-18 looks like as received by the bow tie.

And here’s what WMBC-18 looks like as received by the bow tie. Not much difference!

 

WNJM-51, as received on the FlatWave antenna...

WNJM-51, as received on the FlatWave antenna…

...and the same station, as received by the NorthVu NV20 Pro.

…and the same station, as received by the NorthVu NV20 Pro.

 

THE COMPETITORS – AMPLIFIED DIVISION

Four more antennas rounded out the test, and all of them use active electronics to boost signal levels. NorthVu sent along the NV20 Pro Amplified, which looks exactly like the NV20 Pro except that it has a built-in power supply with AC cord. It’s currently selling for about $90, and Amazon has it.

Antennas Direct’s ClearStream Micron XG antenna is a panel design that comes in several flavors – (1) bare bones, (2) with a variable multi-step inline amplifier, (3) with a separate reflector panel, and (4) with both options together. Figure $80 for the basic panel with amplifier and $130 for the loaded system (which I tested). Oddly, the AT Web site currently lists a lower price for the basic panel antenna and amplifier ($79.99) than for the antenna alone ($89.99)!

The Mohu Leaf Ultimate is basically a Leaf antenna with an outboard preamplifier. Otherwise, it looks identical to the passive Leaf antennas, and you can find it at the same retail outlets for $90. (Sam’s Club had it for $55 at the time I wrote this.)

Finally, Mohu’s Leaf Sky antenna isn’t really an indoor design, but it’s small enough that I thought it would be fun to include it in this test. You may recall some of the bar-style VHF/UHF antennas that were popular a number of years back at the start of the digital TV transition: These could be installed on a roof or mounted on inside or outside walls. I figured it was worth seeing how well the Sky did on a very large window with minimal amounts of metal nearby to de-tune its pattern.

I think we reached the practical load limit for 1

I think we reached the practical load limit for 1″-wide masking tape during this test!

 

They may be hard to see, but there are two 8VSB carriers in there - WABC-7 (left) and WNJB-8 (right). There's just too much noise and not enough carrier-to-noise separation to pull in these signals with the ClearStream Micron XG.

They may be hard to see, but there are two 8VSB carriers in there – WABC-7 (left) and WNJB-8 (right). There’s just too much noise and not enough carrier-to-noise separation to pull in these signals with the ClearStream Micron.

The Leaf Ultimate couldn't do anything to help WABC's signal, but it did pull in WNJB-8 nicely (that hill just to the right of screen center).

The Leaf Ultimate couldn’t do anything to help WABC’s signal, but it did pull in WNJB-8 nicely (that hill just to the right of screen center).

THE TEST

For consistency, I decided to head back to the scene of my early DTV converter box and antenna tests – Turner Engineering, in Mountain Lakes, NJ. The Turner building is located on a bit of a rise with a decent view to the east, northeast, and southeast; good enough to pull in numerous DTV stations from the Empire State Building in New York City, as well as various DTV stations in northern New Jersey.

John Turner, president of the company and a life-long “tinkerer,” has always been a willing and eager accomplice in these tests, so we set up an area in his front office where we could attach each antenna to a window using copious amounts of masking tape (non-inductive!).

I was also able to find some space to set up the test gear, which included an AVCOM PSA-2500C spectrum analyzer, my Toshiba laptop, Hauppauge’s Aero-M USB stick DTV receiver, and Turner’s in-house DTV receiver system (a Samsung DTB-H260F ATSC set-top box, no longer available, and the legendary Princeton AF3.0HD 28-inch HD CRT monitor that was quite popular in the late 1990s.

The test was simple. After each antenna was attached to the window (not an easy task with some of the heavier models), I recorded the spectral views of various DTV channels from 7 (WABC-DT) through 51 (WNJM-DT). I also recorded wide views of the UHF TV spectrum from channels 14 through 51, and selected views of other high-band VHF DTV stations.

The final part of the test involved verifying reception without any dropouts or “hits” for at least 30 a minute. I also recorded MPEG transport streams from various stations to verify the bit error rate (BER) was indeed low.

If I didn’t see any hits and recorded a clean MPEG stream, the test antenna was rated OK for that channel. If the signal locked up even briefly or I saw too many dropped bits in the MPEG stream, it received an INT grade. If the station’s PSIP (Program and System Information Protocol) was detected by the Samsung and Hauppauge receivers, but the receiver couldn’t tune it in, the antenna received a NO grade for that channel.

 

Here's a view of the UHF TV spectrum as

Here’s a view of the UHF TV spectrum as “seen” by the NorthVu NV20 Pro with amplifier.

Here's a view of the same channels from the Leaf Ultimate.

Here’s a view of the same channels from the Leaf Ultimate. WNJM-51 (far right) is quite a bit stronger through the NV20 Pro, but the Leaf Ultimate is grabbing a much stronger signal from WMBC-18 (left).

 

THE RESULTS

Table 1 shows how each antenna fared for 11 different channels. One (WNJB) was on channel 8 in the Warren Hills of New Jersey, while the remaining ten channels  were all UHF and came from Empire and selected locations in New Jersey. The two strongest were WMBC-18 (Montclair NJ) and WNJM-51 (also Montclair), less than 11 miles away.

In addition to the channels listed, I also scanned for WABC-7 (previously received in tests at this location), WPIX-11, WNET-13, WNYE-25, and WNJU-36. However, none of the antennas were able to successfully pull in these stations aside from an intermittent signal here and there, so I dropped them from the test results.

The “No Amplifier” tests were surprisingly competitive, although I didn’t expect the cheapest antenna to be the best performer. But that’s how it played out as the UHF bow tie earned nine YES scores, one INT, and one NO. It was the only antenna to pull in WNYW’s signal on channel 44, a notoriously tough catch at this indoor location.

The WallTenna, Winegard’s FlatWave, and the Mohu Leaf all tied for second place with seven YES tallies, but the WallTenna and Leaf edged ahead by pulling in WNBC’s signal on channel 28 somewhat cleanly whereas the FlatWave couldn’t lock it up.

NorthVu’s NV20 Pro was the biggest disappointment in this test. It only garnered four YES scores against seven NO tallies. I would have expected a lot better, based on the preliminary specifications and information I received from NorthVu’s product management folks.

Table 1 - comparison of passive (top) and amplified (bottom) indoor antenna performance.

Table 1 – comparison of passive (top) and amplified (bottom) indoor antenna performance.

 

Intriguingly, the NV20 Pro is also about the same size as the late, lamented Kowatec CS102; one of the best indoor UHF antennas I’ve ever tested. (Hey, antenna manufacturers! Maybe one of you can scoop up the rights to the CS-102 and resurrect it?)

Things were a bit more exciting in the amplified antenna competition. Mohu clearly had the upper hand here with their Leaf Ultimate product, as it gathered up ten solid YES scores and a solitary INT (for WNYW, of course!) The new Sky product acquitted itself well as an indoor antenna, also bagging ten YES scores and a single NO (from guess who?).

The ClearStream Micron XG (without the reflector, which no other antenna offered or used) came in behind these two with seven YES and three NO tallies, plus a single INT from our friends on channel 44. Once again, NorthVu brought up the rear with their NV20 Pro Amplified, which fared only slightly better than the basic NV20. It scored five YES, three INT, and three NO tallies.

 

We checked for reception through all antennas using this vintage Princeton AF3.0HD CRT monitor. Remember CRT monitors?

We checked for reception through all antennas using this vintage Princeton AF3.0HD CRT monitor. Remember CRT monitors?

This is what the ClearStream Micron XG preamp looks like. Notice the four operating modes, selectable with a small tactile pushbutton.

This is what the ClearStream Micron XG preamp looks like. Notice the four operating modes, selectable with a small tactile pushbutton.

 

CONCLUSIONS

It says a lot that the least-expensive and simplest unamplified antenna design took on all comers and won. It also implies that the particular location where the antennas were mounted just seemed to favor the bow tie this time around (we didn’t test it with an amplifier). These tests were conducted in March with no foliage on nearby trees, whereas my last test was in late July of last year with trees fully leafed out. Even so, the bow tie did pull in WNYW-44 solid as a rock for as long as we chose to watch, something no other passive or amplified antenna could do.

All of the antennas performed equally well at the low end of the UHF band (channel 18) as they did at the high end (channel 51). Five of them were able to haul in channel 8 (about 180 MHz) reliably, which is an impressive feat for such small antennas that expect to work a lot better at UHF frequencies.

Ironically, only two amplified antennas could pull in WWOR on channel 38, something the bow tie did with relative ease. On channel 30 (WFUT), the NorthVu NV20 Pro was the only antenna that couldn’t hook up to the signal. A similar situation occurred with ION-31, not receivable on any of the passive antennas, but plenty strong with the Leaf Sky, Leaf Ultimate, and ClearStream Micron XG. Once again, the NV20 Pro Amplified just couldn’t pull it off.

I should mention that the ClearStream Micron XG’s preamplifier was set to a maximum of 15. Any higher, and the noise floor was degraded, something I could easily see on the spectrum analyzer. In general, I like to keep amplifiers at about 10 dB maximum to guard against this problem – too much gain creates all kinds of reception issues, and you only need to boost the signals up high enough to maintain the required carrier-to-noise ratio (CNR) for reliable digital TV reception.

The separate preamp supplied with Leaf’s Sky and Ultimate antennas is a good design, adding minimal noise while providing sufficient gain to pull signals out of the mud. I can’t say anything about the quality of the NV20 Pro’s amplifier as it is mounted internally, but in my tests it did not appear to add much noise to any of the received signals.

Based on these and previous tests, I’d give the WallTenna, FlatWave, and Leaf a thumbs-up. If you can find one, the bow tie is cheap enough to play around with and may fit the bill. (Hey, Starbucks coffee costs more and the thrill doesn’t last as long). I can’t recommend the NV20 Pro, though.

In the amplified crowd, the Leaf Ultimate and Sky both deliver solid performance. It is a testament to the design of the Sky that it worked so well indoors, but if you opt to use it this way, make sure you have a large window and keep it at least 2-3 feet away from any metal objects.

Antenna Direct’s ClearStream Micron XG is a decent performer, but expensive. I can tell you from a previous test that the reflector made little difference, but if that’s your cup of tea, position the antenna on a non-metallic surface (bookshelf, window ledge, etc.), aim it towards the TV transmitters when using the reflector assembly, and don’t run the preamp higher than the ‘15’ setting.

Most importantly, keep in mind that you don’t need to spend a lot of money to get reliable indoor TV reception. My best performers in the passive category were all under $50, and some were under $40. Check TV reception sites first (TVFool.com is one of the best) to get an idea of how strong signals may be at your location before you buy.

Useful Gadgets: Indoor DTV Antennas – The Third Time’s The Charm

Earlier this year, I posted a couple of product reviews of indoor digital TV antennas. The first test, posted on April 6, concluded that there isn’t a heck of a lot of difference between a $5 bow tie and a $40 ‘flat’ antenna when it comes to VHF and UHF TV reception.

The second test, posted on May 29, gave one manufacturer a ‘do-over’ as their original product didn’t perform all that well and was judged to be defective. And that test also included a newcomer who didn’t make the original cut. (Believe it or not, both tests grew out of a more impromptu test in my house of a couple of panel antennas!)

Since the Round 2 results were posted, three things transpired. First, I became aware of yet another indoor DTV antenna, called the Clear Cast X1 and sold through Sunday newspaper inserts, magazines, and even on this Web site.

According to Clear Cast, “Advanced patent pending design of the X-1 digital antenna pulls in free over-the-air digital and HDTV broadcasts in your area so you can leave behind cable-only channels & expensive cable & satellite bills. Receive crystal clear digital picture on any digital TV in the house with NO monthly bill, easy install and setup plus NO waiting for the cable guy.” OK, I was intrigued enough to order one (they’re not cheap!)

Secondly, the PR firm that represents Antennas Direct – the company that shipped me a Clear Stream Micron XG for Round 2 testing – inquired why I hadn’t tested the accessory reflector with the antenna. (Simple: As Steve Martin used to say, “I forgot!”)

Finally, the Mohu Leaf Plus that self-destructed in Round 2 had been replaced and was ready for another go. (The amplifier failed, a problem Mohu was aware of and corrected in subsequent production.)

So it was clearly time for one last trek to Mountain Lakes, NJ to put all of the antennas from Round 1 and Round 2 through one more workout. I loaded up my spectrum analyzer, computer, several spools of coax, and a few splitters and headed out to put this test to bed once and for all.

THE TEST

For Rounds 1 and 2, I used the same window as the desk in front of it was unoccupied at the time. This time around, I opted for a slightly different location between two desks so that I wasn’t interfering with everyone’s work. Additionally; since the test position had now shifted by about six feet, I decided to re-test every antenna from Rounds 1 and 2 to be consistent and fair to all.

Here's what the test site looked like.

 

And here's the 'reference' bow tie antenna taped to the window.

I was assisted in my endeavor by John Turner, the owner and president of Turner Engineering and a long-time veteran of the broadcast systems integration world. Using AVCOM’s PSA-2500C spectrum analyzer, we positioned a $4.99 Radio Shack bow tie antenna (no longer available) for best reception of WNJM-51 (now known as “NJTV”) out of Montclair, NJ.

I also connected a Hauppauge Aero-M USB stick DTV received to pull in each station, in tandem with the TS Reader MPEG stream analyzer program to verify reliable reception (i.e. low bit rate errors). Each antenna under test fed the spectrum analyzer and Aero-M through a two-way splitter, and each antenna was placed in exactly the same spot on the east-facing window, using four pieces of masking tape as markers for alignment.

For each test, I scanned for channels using the Aero-M receiver. Next, I scanned each physical TV channel that was received with TS Reader to see how clean that stations’ MPEG stream was. Finally, I captured screen shots of the actual waveforms from each station I received. And if those three steps didn’t prove which antenna works the best, I don’t know what would!

THE RESULTS

For the record, here are all of the test antennas:

 

Radio Shack bow tie ($4.99, no longer offered, but you can find them on eBay)

Clear Cast X1 ($68 plus shipping)

Walltenna ($35 plus shipping)

Mohu Leaf ($38 plus shipping)

Mohu Leaf Plus ($75 plus shipping)*

Winegard FlatWave ($40, free shipping through August 31)

Antennas Direct ClearStream Micron XG ($100 plus shipping)*

* – amplified, or comes with optional amplifier

 

For my tests, I scanned for all New York City and New Jersey DTV stations within range of Turner Engineering. One local station (WMBC-18) was so strong that I essentially discounted it from my test results – it would have come in with a paper clip!

The Clear Cast X1 is definitely NOT worth $70. Let the buyer beware!

 

But other stations weren’t quite as strong. WABC-7 is a good test of high band VHF reception, inasmuch as every antenna in the test is supposed to pull in both VHF and UHF signals. WNJB-8 in the Watchung Hills of New Jersey is another good test of VHF reception.

For UHF signals, I checked out WNYE-24 (atop the Empire State Building), WNBC-28 (also on Empire and usually strong), WFME-29 (in West Orange, NJ), WFUT-30 (on Empire), WCBS-33 (Empire), WWOR-38 (Empire), and WNJM-51 (Montclair, NJ).

I didn’t expect the antennas to have much luck with WABC or WNJB, as they are too small to have much gain at VHF frequencies. The amplified antennas were a different story, though. If you are aggressively marketing indoor TV antennas for ‘all band’ reception, then you’d better deliver!

Table 1 shows how the unamplified antennas compared to each other. Satisfactory reception is indicated by glitch-free video streams for at least one minute and a ‘clean’ reading with TS Reader, while Table 2 shows how the amplified antennas (or amplified variations) compared.

Yes, you can actually attach the Micron XG to glass with masking tape! (The reflector was a tad more difficult to install...)

 

Note that the ClearStream Micron XG was tested three different ways –‘ bare bones’ with no amplifier or reflector in Table 1; with its amplifier switched to 15 dB mode in Table 2, and with the amplifier on and the accessory reflector attached in Table 2.

 

Antenna

WABC-7

WNJB-8

WNYE-24

WNBC-28

WFME-29

WFUT-30

WCBS-33

WWOR-38

WNJB-51

RS Bow Tie

Yes

No

Yes

Yes

Yes

Yes

Yes

No

Yes

CC X1

No

No

Yes

Yes

Yes

Yes

Yes

No

No

Walltenna

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Mohu Leaf

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

FlatWave

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Micron XG

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Table 1 – Unamplified antenna performance

 

Antenna

WABC-7

WNJB-8

WNYE-24

WNBC-28

WFME-29

WFUT-30

WCBS-33

WWOR-38

WNJB-51

Leaf Plus

Yes

Yes

Yes

Yes

Yes

Yes

Yes

No

Yes

Micron XG w/amp

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Micron XG w/amp and refl.

No

No

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Table 2 – Amplified antenna performance

 

Oddly enough, the Micron XG was the only unamplified antenna to pull in WWOR-38. But it was ‘tone deaf’ when it came to the two high band VHF stations. Neither version of the Mohu Leaf could snag WWOR-38, either.

As for the vaunted Clear Cast X1, it was unresponsive to any VHF channels and couldn’t hear local station WNJM-51. In contrast, the late, lamented Radio Shack bow tie worked exceptionally well on just about every UHF channel.

Bonus reception: WNJU-36, which is a tough signal to pull in at this indoor location, was successfully reeled in by the Micron XG with amplifier and reflector. So was WXTV-40, also pulled in with and without the accessory reflector.

THE CHARTS

I’ve included a few charts to show what the actual DTV received signals looked like on the AVCOM analyzer. You may be surprised to see how small the differences are between each antenna, and you will also note that the reflector didn’t improve reception at all on the Micron XG – in fact, it actually made things worse, probably due to all of the signal reflections and multipath at the test site.

As a reference, the actual signal levels shown are about 12 dB stronger at the displayed resolution bandwidth (300 kHz).

Here's what the RF spectrum looks like from channels 18 to 51, using the bow tie antenna.

 

And here's the same spectral view using the Clear Cast X1...

 

...using the ClearStream Micron XG...

 

...and using the Mohu Leaf (no amplifier).

 

Here's channel 51, the former WNJM, as received on the bow tie...

 

...and here's the same station on the Clear Cast X1. No improvement.

 

Winegard's FlatWave pulled in channel 51 more robustly...

 

...as did the Walltenna.

 

Finally, here are received waveforms for WNJU-36 and WWOR-38, using the ClearStream MIcron XG with the amplifier set to 15 dB, but minus the reflector...

 

...and here's what those same waveforms looked like AFTER I installed the reflector. Reception actually worsened, something I saw on numerous other UHF channels. Indoor DTV reception can be funny that way!

CONCLUSIONS

It’s hard to make much or an argument for spending very much money on an indoor DTV antenna when you see how well the lowly $5 bow tie design performed! This antenna design has been around since the 1950s and is just one of those things that can’t be improved on – unless you build an array of them. (‘X’-shaped colinear UHF antennas perform the same as the bow ties.) It’s just unfortunate that no mainstream electronics retailer sells these anymore. (Hey Radio Shack, are you listening?)

However, it’s easy to make the argument that the Clear Cast X1 is definitely not worth spending $70 on, especially since it was easily outperformed by the far less costly Leaf, Walltenna, and FlatWave antennas. Even the bow tie picked up six more stations than the X1 in my overall tests, two of them on VHF. I don’t know what’s inside the plastic housing, but I’d bet it is nothing more than a simple dipole, bow tie, or loop antenna (Clear Cast’s claims to having a ‘patent pending’ notwithstanding). Keep your wallets in your pockets!

Among the basic flat antennas, I still prefer the Leaf – it’s smaller and more esthetically pleasing than the Walltenna (which still  does a good job, better than the FlatWave) and it’s been a reliable performer everywhere I travel. The Leaf Plus is a bit pricey at $75, but the amplifier – while not as powerful as that on the ClearStream Micron XG – helps pull in marginal stations and doesn’t add much to the form factor.

As for the Micron XG, I had mixed feelings about it. It’s big and somewhat blocky, expensive, and based on my tests, you can’t depend on it for VHF reception in suburban locations, a chore the other ‘flat’ antennas handled without much difficulty. In its favor, the Micron XG did pull in WWOR, something no other antenna could do. (Maybe that outcome was just a fortuitous combination of antenna position and signal level?)

The Micron XG amplifier makes a big improvement, but I’d suggest running it no higher than 15 dB. The 20 dB setting creates too much noise and also degrades weak signals, as observed with the spectrum analyzer. The lower-gain 10 dB setting is also very handy in fringe urban areas where you don’t need tons of signal, but just need to boost the carrier-to-noise ratio (CNR) a bit.

And that reflector? It’s hardly worth bothering with, as it didn’t improve reception on any of the tested channels and in some cases degraded it. Those results were puzzling, because the reflector effectively converts the antenna pattern to something resembling a two-element yagi, which should have more gain as it becomes more directional. Maybe you’d have different results over a line-of-sight (LOS) path, but that’s hard to ensure when trying to grab DTV signals indoors.

In any case, you should be able to get a decent indoor DTV antenna for less than $50. Stay away from the amplified versions unless you live in a fringe urban or outer suburban area, where there are less likely to be out-of-band sources of overload and interference. Always place your antenna near a window and/or closest to the direction of the TV transmitter(s) for best results.

Good luck!