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
The analog front end of oscilloscope is the key to determine the bandwidth
The key to determine the bandwidth is the analog front end of the oscilloscope, including attenuator, amplifier and related circuits. It is the gate through which the measured signal enters the oscilloscope. The bandwidth of the test signal of the oscilloscope is determined by the bandwidth of the analog front end in many cases, which directly affects the background noise and range of the oscilloscope. The design of analog front end takes up more than half of the work in the hardware design of oscilloscope, and determines the hardware performance of oscilloscope to a large extent.
For the analog front end, the main performance indexes affecting the oscilloscope include:
●analog bandwidth, including the amplitude-frequency response characteristics of the measured signal, in the time domain as rise time index and overshoot performance index;
● dynamic range of input signal amplitude (range from minimum vertical sensitivity to maximum vertical sensitivity for non-digital processing);
● initial error characteristics and temperature drift characteristics of dc gain accuracy and offset accuracy;
● input impedance characteristics (parasitic capacitance of resistance in parallel) influence on the circuit under test with or without a probe.
The development of oscilloscope probe
In the past 50 years, the interface design of various oscilloscope probes has been evolving continuously to meet the requirements of increased instrument bandwidth speed and measurement performance. In the earliest days, banana plugs and UHF connectors were commonly used. In the 1960s, the common BNC connector became the common probe interface type because BNC was smaller and more frequent.
Later, some manufacturers put forward the common workarounds, BNC type probe interface design in the use of the BNC connector at the same time, additional provides a simulation code detection scale coefficients of stitching, as part of the mechanical and electrical interface design, which makes the oscilloscope is compatible with automatic detection and change the oscilloscope display of vertical attenuation range.
Requirements for oscilloscope current probe
Wide frequency range: from dc to tens or even hundreds of megabytes.
The range is large: from milliampere to kiloampere.
Small size: with the improvement of integration and the increase of signal frequency, the external size of components is getting smaller and shorter and pins are getting shorter and shorter. Easy operation and high accuracy.