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Calibration Type *

All Signal Hound devices are calibrated to better-than-box specs during production. However, if you require a signed calibration certificate with a printed packet of calibration data, you will need to select it below:

Warranty length *

Our standard warranty is for a 2-year time period. An extended warranty is available up to a total of five years (2-year warranty plus 3 additional years). Extended warranties are calculated at 6% of the product cost, per year.

Combine this tracking generator with a USB-SA44B spectrum analyzer to create a Scalar Network Analyzer and save!

The Signal Hound TG44A is a 10 Hz to 4.4 GHz tracking generator which works with your SA44B to measure filters, attenuators, amplifiers and more! It is compact, simple to use, and an effective troubleshooting tool for general lab use, engineering students, ham radio enthusiasts, and electronics hobbyists.


  • RF Frequency Range: 10 Hz to 4.4 GHz
  • Amplitude range: -30 dBm to -10 dBm
  • Step sizes from 10 Hz to 10 MHz
  • Sweep up to 700 frequency points per second with the SA44B
  • No external power supply needed – draws power from USB
  • Software and Hardware included for one low price
  • Write your own software with our
    free Application Programming Interface (API)
  • Compatible with Windows operating systems
  • Measures 8 inches long
  • Weighs 10 ounces
  • Includes 20 dB attenuator, p/n Mini-Circuits VAT-20+

25 reviews for TG44A Tracking Generator

  1. Avatar

    Bobbie C. (verified owner)

    The package was delivered on time.

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    Davidson S. (verified owner)

    Works great, broad capabilities – solid piece of kit for any RF workbench

  3. Avatar

    Kevin N. (verified owner)

    I has a few quirks getting the software going (but Signal Hound tech support was totally awesome, thanks!), after that it seems to work as advertized.

  4. Avatar

    Davidson S. (verified owner)

    I love it. It would be even better if there were a fiber optic interface instead of a BNC interface (you’d sell many more units if you had this)

  5. Avatar

    Raymond S.

    I use the TG with the SA to make a Scalar Network Analyzer. This is a great tool in a portable package (using a laptop). As a bonus, I’ve used the TG in CW mode as a Signal Source too. Combined with the SA and Spike Software, this makes an amazing kit that’s great value for the price!

  6. Avatar

    Dean V.

    Great for aligning and tuning duplexers.

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    John A.

    The spectrum analyzer functioned precisely as advertised. The accompanying application was easy to use and intuitive. I recommend this product and would make another purchase if the need arises.

  8. Avatar

    Jason G. (verified owner)

    An excellent piece of equipment for its price. It’s invaluable for tuning and verifying filters, cable testing, and component & system insertion losses.

  9. Avatar

    Mark K.

    We use this product regularly and the USB connection is very unstable which causes software to crash. We do not see this problem with other brands of products that use USB communications and are similar. We also had a failure with the internal power supply and no schematics are available but I was able to fix it. I think the issue with unstable software in tracking gen sweep mode needs to still be rectified. Support still continues to blame the PC but we have the same problem on a number of windows 7 pcs.

  10. Avatar

    Larry R.

    This instrument proved well suited for most of our applications at a cost less than a month’s rental of a traditional instrument. Most of the on screen controls were instinctive. Good value.

    Issues: Operating with the tracking generator at narrow bandwidths was finicky. The biggest issue was the lack of ability to reduce the sweep time to longer than the automatic setting. This function is critical when measuring systems with low duty factor switched paths.

  11. Avatar

    Nishiyama S.

    It was purchased for filter design with SA44B. You should have TG44A as my case.

  12. Avatar

    Mervyn T.

    I have owned and used this Spectrum Analyser for around 6 or 7 years now. It has been my only S/A and although only used in a hobby environment by a non-professional (me) I have found it to be extremely dependable and way more accurate than what I will ever need. I have had occasions when the software hangs but that was possibly computer rather than signal hound software problems. I have the companion Tracking Generator as well and both units get top marks from this Radio Amateur user. I plan to install the software (old and new-Spike) on my Windows 10 machine and once I am set up at my new downsized QTH it will be put into use again.

    A very reliable and well engineered product.

  13. Avatar

    Demostenes S.

    I have bought the combo: USB-SA44B + USB-TG44A + ZHDC-16-63+(directional coupler- 6GHz) i did a master degree in microwave circuits, and those equipments were a plus on my work . i built and test everything at home before go to university for the offical measurements, it saved me a lot of time. i built some microstrip filters, small signal amplifiers , and others… not surprising the results concordance with agilent +$15000,00 equipments was awsome.

    As a bonus i did a first glance “impedance matching test”, in some trasceivers PCBs i have built using the older software and the Smith Chart app.

    Adalberto Amorim Filho – Brazil.

  14. Avatar

    Gerard A.

    Original failure (out of the box) of the attenuators recurred about a year, or so, later. …currently using external attn’s on my coax input line. Otherwise, like the SA and TG combo.

  15. Avatar

    Kevin M.

    I purchased the early SA44/TG44A Spectrum Analyser/Generator in 2010. The early software was very clunky, but with the release of the Spike software, the usability has increased. Sure the operation is a little different to the conventional analysers I use in my day job, but it sure is a useful piece of kit, for doing tests. I have used it for looking at crystals and crystal filters, low level intermodulation, noise figure and phase noise tests, as well as general spectral analysis. This early version has a few spurious around the place, but the small footprint, and the smarts in Spike, make it a very useful addition to the lab.

  16. Avatar

    David D.

    I purchased the SA, and then the TG. Several years out of warranty, the TG failed, and I called them about an RMA. I said I’d have to think about it, the repair cost was close to the cost of a new one. One or two days later, they called me back and said, “You know, we had some problems with those early units, and we’re replacing yours.” So they have my heartfelt thanks. I have since bought a “bricked” SA at a ham radio flea market, which they repaired for, I think, $159, Doze guys are allright!

  17. Avatar

    Naveendray M.

    We stopped using it after a few attempts as the measurable span was too small as we needed more than 60mhz of span.

  18. Avatar

    Tisha H. (verified owner)

    This is a great device to pair up with the BB60C spectrum analyzer. It actually can make cavity filter adjustments a little fun.

  19. Avatar

    Randy K.

    Good basic unit. The frequency is very accurate, phase noise is acceptable depending on your application. The literature correctly describes the units capabilities. The software is very straightforward and drivers loaded Windows 7, no problem.

  20. Avatar

    Scott S.

    I really like the USB-TG44A Tracking Generator and USB-SA44B 4.4 GHz Spectrum analyzer combo. For context, I designed low frequency spectrum analyzers for a well known company many years ago. It is truly amazing how much power one can (literally) put in one’s pocket today. Sure, pay 10x (or 100x) more, and get faster updates, wider real time bandwidth, but these are serious instruments you can take with you to get your work done.

  21. Avatar

    Kamran A.

    So far I have a BB60A, one SA44B and TG44A. I have been happy with all three. A few times I contacted customer service and talked to someone both knowledgable and helpful. Once I asked for TG44A control under Spike and a couple of weeks later I found that on the newest release. Looking forward to work with their newest analyzer….

    Kamran Abadi

  22. Avatar

    Jay S.

    The only problem I ran into was the need for a Power Amplifier for the output and Signal Amplifier on the input of the Spectrum Analyser. I suppose these Amplifiers could come from third party but it would be convenient to have a source from Signal Hound made specifically to work with my purchases.

  23. Avatar

    Luciano M.

    Excellent equipment, I have a TG- 44A and a SA-44B. These are wonderful tool, very good indeed. I’m looking for a USB-VNA developed by Signal Hound or the smith chart plot in Spike software.

    Strong hug.

    Luciano Mairink

  24. Avatar

    Lloyd S

    I have owned the Signal Hound Spectrum Analyzer/Tracking generator for the past several years. With the SPIKE software, I would give it an excellent rating. I have also used the comparably price Rigol and much prefer the Signal Hound.

  25. Avatar

    Charles Staples (verified owner)

    I am sure it could have been a wonderful device. The USB software connected just fine on three different computers with three different operating systems, but it would not control the TG44. It was a hardware problem. Support was from software people who were arrogant and condescending. The unit would only generate 10 mHz. Support would not send a replacement unit, but insisted that I send it in for repair. Knowing the evaluation period was ending, I returned the unit and went another direction as I feared I would be stuck with this brick. What a waste of my time!

    • Andrew


      Hi Charles,

      We are sorry for the difficulties you experienced. We appreciate your patience trying to work through the issues and we are sorry we were not able to find a solution. Thank you for your past business and being a long time user of our spectrum analyzers.


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Device dimensions


Weight.6 lbs (.27 kg)
Dimensions7.65" x 3.18" x 1.18" (19.4 x 8 x 3 cm)

Product-in-packaging dimensions


Weight1.46 lb (.66 kg)
Dimensions9.25" x 5.44" x 3.13" (23.5 x 13.8 x 7.95 cm)

Software and Drivers

Spike software

  • Spectrum analysis software for all Signal Hound spectrum analyzers.
  • Separate USB driver download for TG devices.
  • Unzip (extract all files and run Spike Installer.msi and CDM v2.12.00 WHQL Certified.exe).
  • Includes Standalone TG44A software, found in the Spike directory after installation.

Signal Hound Software Development Kit

  • C Programming interface for Windows/Linux
  • Direct device control 

User Manuals

Legacy Software

The TG44A can be used with the legacy SA44B and SA124B software, located on the SA44B downloads page