How to choose a suitable RS Rohde & Schwarz signal generator?

RS Rohde & Schwarz signal generator covers a frequency range from 9kHz to 1.1GHz or 3.2GHz, with an output power greater than 17dBm. The important modulation functions (AM/FM/φM/pulse modulation) that an analog source should have are integrated into the instrument. This makes the generator a flexible and versatile instrument. The generator is very suitable for use in repair and maintenance laboratories.

It is necessary to choose a suitable RS Rohde & Schwarz signal generator. So what factors can be used as a reference when choosing? The following is some experience shared by Antai Signal Generator Repair Center:

1. Sampling rate

Sample rate, usually expressed in megasamples per second or gigasamples per second, specifies the maximum clock rate or sampling rate at which the instrument can run. The sample rate affects the frequency of the primary output signal. In general, you should choose an instrument that samples at twice the highest spectral frequency content of the signal you are generating to ensure accurate signal reproduction. The maximum sample rate also determines the smallest time increment that can be used to create a waveform.

2. Memory depth (storage length)

Memory depth or record length plays an important role in signal fidelity because it determines how many data points can be stored to define a waveform. The deeper the memory, the more waveform detail can be stored, and the higher the number of cycles required to store the waveform.

3. Vertical resolution

Vertical resolution is related to the binary word length of the instrument's DAC, expressed in bits, with more bits resulting in higher resolution. The vertical resolution of the DAC determines the amplitude accuracy and distortion of the reproduced waveform. Although higher is better, there is an overall tradeoff with most arbitrary waveform instruments, as higher resolution requires lower sampling rates.

4. Features and functions

When selecting, you should evaluate standard waveforms, modulation capabilities, output amplitude, and waveform editing software to ensure the instrument meets your needs.

5. Meet the signal type and function required by the application

From the application point of view, if it is used for digital signal testing, a vector signal source is more suitable; if it is mainly used for basic circuit experiments and general electrical appliance repairs, an ordinary function generator is more suitable; if it is mainly used to adjust the sensitivity of walkie-talkies, a high frequency is required.

6. Meet the frequency and output amplitude required by the application

The frequency coverage, modulation mode and signal output amplitude must meet the needs of the application.

7. The price is within the budget

High-end and mid-range instruments are high-value instruments with high-end performance and are easy to use. However, if you do not have enough budget, you can also consider renting instead of buying. In addition to the guaranteed performance indicators of the instrument, it also supports you to a certain extent, increases the trust of knowledgeable customers in the test results you provide, and represents the strength of the testing organization.