Types of RF Generators

Current test and measurement technology news


July 02, 2020 - Siglent introduces a new series of signal generators consisting of two versions and with a maximum output frequency of up to 6 GHz. The SSG5000X is a classic analog HF generator with the unbeatable price-performance ratio typical for Siglent. The second version of the series is called SSG5000X-V. The "V" in the name stands for vector signal generator.

The V version has internal IQ modulation with an HF modulation bandwidth of up to 150 MHz, as well as a play-back function for arbitrary signals. The well thought-out menu structure makes it possible to generate complex signal types quickly and easily. The SIGLENT SSG5000X generators are flexible and powerful RF signal sources, which can be the missing part to solve the RF test puzzle in development, training or production.

The introduction of the new line of signal generators is another step in Siglent's endeavor to offer a complete range of RF test solutions. The new device series with the designation SSG50000X can generate analog and vector signals up to a maximum frequency of either 4 GHz or 6 GHz. This means that Siglent is now able to address the entire sub-6 GHz range. This also includes the newest redefined NR-5G band (FR1), which is between 3.4 and 3.7 GHz. A look at the specifications already gives an indication of the generator's outstanding performance. The specification of the phase noise is -120 dBc (@ 1 GHz / 20 kHz offset), the regulated maximum output level reaches up to +20 dBm (adjustable up to +26 dBm), the minimum output level is -130 dBm (adjustable up to -140 dBm) . With the optional OCXO module it is possible to improve the temperature stability enormously. This is especially important for precise testing and in the manufacturing area.

The basic version of the SSG5000X is equipped with a 5 "touch display. The front and the menu structure of the display are easy to use and clearly laid out so that familiarization only takes a few minutes. Like almost all of the recently introduced Siglent devices also the SSG5000X via a web server for simple remote control via Ethernet. The analog RF generator offers all analog modulation types including pulse modulation as standard. Different types of frequency or amplitude sweeps can be set and combined. The BNC sockets Signal Valid and Trigger In / Out on the back allow a problem-free and simple implementation in automated test systems. All devices support the connection and control of an external USB power meter. This can be used, for example, to compensate for the loss of the signal path between the HF output of the generator and the DUT.

The SSG5000X-V vector signal source is the right choice for demanding applications such as receiver tests where complex modulated signals are required. There are several ways to define and generate IQ-modulated signals. The custom mode allows for quick setup of standard modulation schemes such as ASK, FSK, PSK and QAM with a symbol rate of up to 120 Msps. This type of signal is often used for in-band blocking (modulated interferer). In the event that “multi-carrier signals”, such as OFDM-modulated signals, as used in digital broadcast, wireless or cellular telecommunication systems, are required, the powerful ARB mode is the solution and offers the necessary flexibility. The SSG5000X-V has implemented a selection of common standard signals such as NR-5G, LTE, WLAN, WCDMA, GSM, BLUETOOTH. If these are not exactly what is needed, custom ARB files can be created, uploaded and played back. Additive white Gaussian noise (AWGN) can be generated in the device and added directly to the desired signal. This is also an important function when specifying recipients.

Differential I and Q baseband signals can be output via the BNC connections on the rear. Additionally, Siglent added I and Q baseband inputs to support external IQ modulation as well. Therefore it is possible to use the generator in all phases of the development of transmitters - or receivers.

The multi-tone mode makes it easy to generate two-tone or multi-tone signals. In the associated menu only the number of tones and the distance between the tones have to be selected. Multi-tone signals are widely used for audio measurements, nonlinear distortion tests of amplifiers and receivers, and ground and satellite communications tests.

The 4 GHz SSG5040X (-V) devices can later be upgraded to 6 GHz using a software license. This secures the investment and the generator can grow along with the requirements.

With the arbitrary function generator SDG6000X and its IQ option, the entry-level HF generator SSG3000X (-IQE) and the new SSG5000X (-V), Siglent is now able to add three suitable parts to the solution of the RF design puzzle .


English reports from www.All-about-Test.eu