A spectrum analyzer that covers 1 GHz can help inspect signals below, at, or above that frequency, depending on its range. The Siglent SSA3021X is best for bench users who need coverage beyond 1 GHz; the RF Explorer WSUB1G Plus is best for portable measurements up to 1 GHz. The Rigol DSA815-TG offers a tracking source, while the RF Explorer 6G WB Plus extends into higher bands. The NanoVNA is included as a related antenna-measurement tool, not a spectrum analyzer.
| Product | Best suited for | Frequency range |
|---|---|---|
| Siglent SSA3021X | Bench RF measurements | 9 kHz–2.1 GHz |
| RF Explorer WSUB1G Plus | Portable sub-1 GHz work | 50 kHz–1 GHz |
| Rigol DSA815-TG | Bench testing with tracking source | 9 kHz–1.5 GHz |
| RF Explorer 6G WB Plus | Portable wideband analysis | 15 MHz–6.1 GHz |
| AURSINC NanoVNA-H | Antenna and network measurements | 9 kHz–1.5 GHz |
Siglent SSA3021X Spectrum Analyzer
The Siglent SSA3021X covers 9 kHz to 2.1 GHz, making it a strong bench option for buyers who need to examine signals around 1 GHz and still have room to measure higher frequencies. Its all-digital IF technology is a listed feature, and its typical displayed average noise level (DANL) is -161 dBm/Hz.
Best for: RF technicians and electronics users looking for a broad-range bench spectrum analyzer with low-level signal visibility. It was selected because its frequency range comfortably includes 1 GHz and extends to 2.1 GHz.
Limitation: This is a bench instrument rather than a slim handheld model, so choose a portable analyzer if carrying the unit is a priority.
RF Explorer WSUB1G Plus Handheld Analyzer
The RF Explorer WSUB1G Plus covers 50 kHz to 1 GHz, matching the needs of buyers whose measurements stay within the sub-1 GHz range. The manufacturer-listed features include high-resolution spectrum analyzer mode, Wi-Fi analyzer mode, Tracking SNA, a rechargeable internal lithium battery, and a metallic enclosure.
Best for: Field users who want a handheld device for signals below 1 GHz, with additional analyzer modes. It is the most directly targeted choice here for portable measurements that do not need coverage above 1 GHz.
Limitation: Its stated upper limit is 1 GHz, so it is not the right pick if you need to analyze signals above that point.
Rigol DSA815-TG With Tracking Source
The Rigol DSA815-TG is a swept spectrum analyzer with a frequency range of 9 kHz to 1.5 GHz. Its listed specifications include a 10 Hz minimum resolution bandwidth and a typical minimum DANL of -161 dBm. The tracking source makes it a relevant option for users who want that function as part of their RF test setup.
Best for: Bench users who need a spectrum analyzer covering 1 GHz and value a tracking source for swept RF work. Its range includes useful headroom above 1 GHz without extending as far as the Siglent model.
Limitation: Its maximum frequency is 1.5 GHz, which is lower than the SSA3021X and far below the RF Explorer 6G WB Plus.
RF Explorer 6G WB Plus Handheld Analyzer
The RF Explorer 6G WB Plus covers 15 MHz to 6,100 MHz with no gaps, according to its listed features. It has 0.5 dBm amplitude resolution and includes free Mac and Windows software for analyzing RF and Wi-Fi networks. The software supports 2D and 3D waterfall views, and the listed firmware upgrade includes Wi-Fi Analyzer.
Best for: Portable users who need to cover 1 GHz as part of a much wider frequency range, including higher RF and Wi-Fi bands. Choose this model over a sub-1 GHz unit when flexibility across multiple bands matters.
Limitation: Its stated lower frequency limit is 15 MHz, so it does not cover signals below that frequency.
AURSINC NanoVNA-H Antenna Analyzer
The AURSINC NanoVNA-H is a vector network analyzer, not a spectrum analyzer. Its listed range is 9 kHz to 1.5 GHz, and its functions include measuring S-parameters, SWR, phase, delay, and Smith charts. The upgraded version has a 2.8-inch TFT display, a MicroSD card port for saving measurement data or screenshots, and a rechargeable battery circuit.
Best for: Buyers focused on antenna performance and network measurements around 1 GHz rather than viewing the spectrum of received signals. It is included as a related RF tool for a different measurement task.
Limitation: Do not choose it as a substitute for a spectrum analyzer; its listed purpose is vector network measurement.
Buying Guide: Choosing a 1 GHz Spectrum Analyzer
Should the analyzer stop at 1 GHz or go higher?
Choose a model that reaches at least 1 GHz, then add frequency headroom if you expect to measure higher-frequency signals. The RF Explorer WSUB1G Plus ends at 1 GHz. The Rigol reaches 1.5 GHz, the Siglent reaches 2.1 GHz, and the RF Explorer 6G WB Plus reaches 6.1 GHz. A wider range can serve more applications, but it is not necessary if your work stays below 1 GHz.
Do you need a handheld or bench instrument?
A handheld analyzer is better suited to field use and portability. The RF Explorer models are slim handheld options, and the WSUB1G Plus lists an internal rechargeable battery. Bench instruments such as the Siglent and Rigol are more appropriate when a stationary setup and broader bench workflow are priorities.
What do DANL and resolution bandwidth tell you?
DANL describes the analyzer’s displayed noise floor; a lower value can help when examining weak signals. The Siglent and Rigol list a typical -161 dBm DANL figure. Resolution bandwidth affects how finely signals are separated across the display. The Rigol lists a 10 Hz minimum resolution bandwidth, while the other supplied product details do not specify a corresponding value.
Is a vector network analyzer the same as a spectrum analyzer?
No. A spectrum analyzer displays signal energy across frequency. A vector network analyzer measures network characteristics such as S-parameters and antenna-related values. The NanoVNA-H can be useful for antenna work, but it is not a replacement for a spectrum analyzer.
Frequently Asked Questions
What does a 1 GHz spectrum analyzer measure?
It measures signal amplitude across a range of frequencies that includes 1 GHz. The exact usable range depends on the instrument’s stated lower and upper frequency limits.
Is a 1 GHz maximum enough for sub-1 GHz signals?
Yes, if all signals you need to inspect are at or below 1 GHz. Select a higher-range model if future measurements may exceed that limit.
Which listed model is portable and covers up to 1 GHz?
The RF Explorer WSUB1G Plus is a handheld analyzer with a listed range of 50 kHz to 1 GHz.
Which listed analyzer has the widest frequency range?
The RF Explorer 6G WB Plus has the widest stated range in this selection: 15 MHz to 6,100 MHz.