DSA815 - TG spectrum analyzer contains 1.5 G digital spectrometer tracking source R
DSA815 - TG spectrum analyzer (including tracking source)
The digital intermediate frequency technology
9 kHz to 1.5 GHz frequency range
Shows the average noise level (DANL) - 135 dBm (typical)
Phase noise - 80 dBc/Hz (offset 10 kHz)
Whole range accuracy < 1.5 dB
Minimum resolution bandwidth (RBW) 100 Hz
The standard preamplifier
1.5 GHz tracking source (DSA815 - TG)
Equipped with abundant advanced measurement function
Equipped with EMI filter and peak detector
Pattern matching VSWR measurement suite
Rich interface: LAN, USB Host, USB Device and GPIB (optional)
8 "WVGA (800 x480) display, intuitive operation
There are usually three methods of bandwidth for high - end oscilloscopes
One is the direct realization of preamplifier circuit;Second, DSP is used to stretch bandwidth;Third, digital bandwidth reuse.
According to tek, each of the three approaches has its own advantages. At present, preamplifier direct implementation and DSP stretch bandwidth technology are widely used in the market. From the perspective of use, the bandwidth of hardware implementation USES less digital technology, with high signal fidelity, more flexible in use, less restrictions, flatter frequency response and noise spectrum, support equivalent sampling and undersampling, and allow signal beyond the screen, but the cost is relatively high. In contrast, digital technology may cause fluctuation of frequency response or noise spectrum, with low effective bit at some frequencies. Meanwhile, digital technology requires real-time sampling, does not support under-sampling, and waveform distortion will occur when the signal goes beyond the screen, which has relatively high restrictions and higher requirements on users. But the bandwidth achieved by digital technology is relatively cheap due to the low cost of hardware, providing a cheap solution for users at the expense of some performance.In general, preamplifier technology and DSP provide different options for different customers.
Oscilloscope chooses appropriate storage depth, also called record length
Storage depth is a measure of how many sampling points an oscilloscope can store. If you need to capture a pulse string continuously, you need the oscilloscope to have enough memory to capture the entire event. The required storage depth can be calculated by dividing the length of time to be captured by the sampling rate needed to accurately reproduce the signal.
Storage depth is closely related to sampling rate.The depth of storage you need depends on the total time span to be measured and the required time resolution.
Modern oscilloscopes allow users to select record lengths to optimize the details of some operations. Analysis of a very stable sinusoidal signal requires only 500 points of record length;But to parse a complex stream of digital data, you need a million points or more of record length.
Capturing the effective trigger of the signal in the right position can usually reduce the storage capacity of the oscilloscope.