Many users have such confusion: a variety of oscilloscopes and probes in the laboratory, can the probes and oscilloscopes of different manufacturers be mixed? Will it affect the measurement? Some probes have a special shape. Is this specially designed probe considered for technical or commercial mode? Can it be compatible with other models of oscilloscopes? This article was announced one by one.
First, BNC connector
The BNC connector is a connector for coaxial cable, which is a bayonet-fit connector. It is now widely used for signal connection and transmission, including analog or digital signal transmission, amateur radio antenna connection, avionics. The connection between the device and some other electronic test equipment.
Figure 1 BNC connector
The BNC's characteristic impedance is 50Ω/75Ω and the frequency range is up to 2GHz. It can meet the requirements of instrument bandwidth speed and measurement performance. The common BNC connector is small in size and high in frequency, and has become a common type of probe connector.
Figure 2 probe BNC interface
Second, the probe connector type of different manufacturers
Oscilloscope probes are generally divided into active probes and passive probes .
Passive probe: The passive probe consists of a RC component. There are no active components in the probe, so no power supply is required. Passive probes are economical and practical in testing, as shown in Figure 3.
Active probe: The active probe consists of a RC component and an active component, so additional power is required. The active probe test is stable and the price is high. As shown in Figure 4.
Figure 3 Passive BNC probe
Figure 4 Active BNC probe
The oscilloscope probes are basically BNC interfaces to a certain extent. Some manufacturers have made functional innovations and modifications on the basis of BNC interfaces, making them more suitable for their testing needs. That is, while using the BNC connector, an additional scale factor detection pin for analog coding is shown in Figure 3, which allows the probe ratio to be automatically recognized. The compatible oscilloscope can automatically detect and change the vertical attenuation range displayed by the oscilloscope. Figure 4 shows.
The passive probe of Figure 3 can be used for signal input from most oscilloscopes. The probe of Figure 4 is only suitable for its oscilloscope input because it is uniquely designed in structure and requires power.
Third, how to determine what type of probe is available to the oscilloscope
The figure below shows the three types of oscilloscope input interfaces currently available on the market. Different types of probes support different types of probes.
Figure 5 oscilloscope input interface
The first and the second are BNC interfaces with special design in structure and function, and the third is common general BNC interfaces. Which types of probes are compatible with these three oscilloscope interfaces? How do you determine the type of probe supported by the oscilloscope input interface? The specific judgment method is divided into the following four points:
1. Power supply mode of the probe: The standard passive BNC probe does not need to be powered, so it can be used for most oscilloscope input interfaces; if the power supply of the active BNC probe is designed in the internal structure of the probe and matched with the input end of the oscilloscope, this The types are only available for oscilloscope inputs that are compatible with them. As shown in Figure 6.
Figure 6 power supply mode
If the active BNC probe is powered by an external power supply, it can be used for most oscilloscope input interfaces, as shown in Figure 7 below.
Figure 7 External adapter active BNC probe
ZLG Zhiyuan Electronics' latest ZCP0030-50 current probe is also a universal interface, 5A/30A range, 50M bandwidth, 1% measurement accuracy. All oscilloscopes can be used directly, as shown in Figure 8.
Figure 8 ZCP0030-50 current probe appearance
2. Interface structure: The active BNC probe is structurally matched to the shape of the oscilloscope input. It can only be used on the oscilloscope matched with it, as shown in Figure 9. If it is used on an oscilloscope that does not match it, it may come into contact. Unstable, measuring inaccuracies.
Figure 9 The oscilloscope does not match the probe structure
3, load impedance requirements: some active BNC probes have certain requirements on the input load impedance of the oscilloscope, so you need to check the manual used by the probe to understand its requirements for the input impedance of the oscilloscope. If the input impedance does not match, it may cause the signal amplitude. Attenuation.
4. User Manual: If there is no way to judge whether the probe can be used on an oscilloscope, you can directly check the probe's manual to understand how it works and the work requirements.
Fourth, summary
All brands of oscilloscopes are universal in terms of standard BNC interfaces. However, it has a special appearance, and the probe interface of the special structure is generally a dedicated interface, which can only be applied to a certain brand or even a series of oscilloscopes of the brand. At the same time, such probes are generally expensive, and if the oscilloscope brand or model is replaced, all probes will be void. This is a market strategy to a greater extent, with the aid of probes to increase the difficulty of changing and the cost of changing.
Therefore, when purchasing probes, whether for economic reasons or long-term strategies, we recommend probes with universal interfaces.
The MTP series DC Power Supplies are High Power DC power supplies developed by iDealTek-Electronics based on IGBT semiconductor components, adopting AC/DC power processing topology with full-bridge phase-shift soft-switching technology. This series of High-power DC power supplies have the most output models and the widest output range in the company's DC power supply series, from 3KW ~ 30KW integrated in 19-inch standard rack-mounted high-precision DC power supplies to 45KW ~ 2000KW with casters or floor-standing Cabinet type High Power DC power supplies, output voltage up to 2000VDC, output current up to 6000A.
This series of High-power AC - DC power supplies are equipped with a reliable two-stage conversion mechanism drive logic circuit and a fast control loop optimized by iDealTek-Electronics. Which balances the requirements of low output ripple and fast DC output response speed, making this series of High-power switching power supplies can provide high-precision, low ripple, high-stability and High-power DC output with fast response speed feature of the switching power supply. All MTP series DC power supplies are equipped with a short-term 2 times rated current overload capacity (Except for some high-current output models) to cope with the inductive and mixed load's demand for high-current output at the moment of starting.
The full range of MTP series high-power DC power supply adopts digital control circuit. You can set and control the power output through the buttons on the front panel of the power supply (3KW ~ 30KW) or LCD touch screen (45KW ~ 2000KW). The high-precision 4 1/2-digit LED (3KW ~ 30KW) or LCD (45KW ~ 2000KW) provides intuitive, high-precision output display and measurement functions. At the same time, the full range of MTP high-power DC power supplies are equipped with RS485 interfaces as standard, following the MODBUS-RTU international communication protocol, which can realize remote control and operating status monitoring of the power supplies.
At present, this series of High Power DC power supplies are mainly used in Battery charging testing, DC motor testing, Photovoltaic inverter testing, and various cutting-edge applications that require High-power DC output.
High-power DC Power Supplies, High Power AC - DC Supplies, High-power Switching Power Supplies, High-power AC DC Supplies, High-power Power Supplies
Yangzhou IdealTek Electronics Co., Ltd. , https://www.idealtekpower.com