Type:Logic ICs
Condition:New
Model Number:NWT500
Decoration and Construction Contents:NWT500
Name: NWT500 Sweeper, Amplitude-Frequency Characteristic Analyser
Name: NWT500 Sweep analyzer, amplitude-frequency Characteristic analyzer
Model: NWT500-BNC
TYPE: NWT500-BNC
Frequency range: 0.05M-550MHz,
Frequency range: 0.05M-550MHz,
Step: 1Hz
Stepping: 1Hz
Output signal strength: 4dBm
Output signal strength: 4dBm
Logarithmic dynamic range: better than 50 dB
Logarithmic Dynamic range: better than 50 dB
Linear detection range: 0-1V EMF
Linear detection range: 0-1V EMF
Interface: USB, N/BNC/SMA
Interface: USB, BNC
Power supply: DC11.5-12.5V/0,5A
Power Supply: DC11.5-12.5V/0,5A
Control software: WINNWT4 V4.08.02
Control Software: WINNWT4 V4.08.02
Size: 40.5*97*178mm
Size::40.5*97*178mm
Accessories: One AC (100-220) V-DC12V adapter, two SMA lines, one USB line, one CD, two BNC-SMA converters.
Characteristic:Supports logarithmic and linear detection with 0-50DB attenuator.
It can measure impedance, standing wave (impedance standing wave needs to be used with bridge) and other functions.
4-ply design
Features: support logarithmic, linear detection, with 0-50DB attenuator,
Capable of impedance, VSWR (impedance VSWR bridge need to meet with) other functions measurement
4-layer design
Pictures for reference, in kind prevail!
Pictures for reference, to prevail in kind!
appendix1Questions and Answers to Frequent Questions
Appendix 1: FAQ
1, What is a sweeper and what is its function?
What is this,Anything used
Frequency sweeper, also known as frequency characteristic tester, is a measuring instrument, which can measure the frequency and amplitude characteristics of the measured parts. For example, measure oneLCResonant circuit, amplitude versus frequency curve, understandLCFrequency characteristics of return.
Sweep is frequencycharacteristicTeser, is a test set, test compent frequency and amplifiler curve, Suh as test a LC tank frequency and amplifiler curve.
2, NWTSeries sweepers andBT3What's the difference between a kind of scanner that uses a picture tube?
What is the difference of NWT sweep and BT3 (CHINA TYPE) used CRT sweep.
NWTSeries is a digital frequency sweeper, with small step interval and connected with computer to process data, which can be done.VFOOutput. It is smaller, lighter and more accurate than the old sweeper. EspeciallyNWT4000-1,NWT4000-2It can be used for simple spectrum.
NWT serial sweep is digital sweep,Small step, connect PC calculation data, can VFO output. smaller lighter than the old sweep. NWT4000-1, NWT4000-2 can use simple spectrum analyzer
3,Why did the scanner not respond when it connected to the computer?
Sweep connected PC no response
Need to checkUSBWhether the driver is installed, exteriorDCWhether the power supply is connected correctly and the software settings are correct.
Check USB driver, check extern DC power, check software set.
4,Can the sweeper measure diplexer? How to measure it
Sweep can test duplexer, how to test
It's measurable. Duplexers are actually2The output of the sweeper is connected with the antenna end and the receiver end of the diplexer, and the input of the sweeper is connected with the machine end to measure.
Can test,Duplexer is a filter.Frequency sweep meter is connected to the output of the duplexer antenna terminal and receiving terminal, frequency sweep meter input end connected machines, can be measured
5How does the sweeper measure the antenna?
How to test antenna
A standing wave bridge or a three-way antenna can be used to measure the antenna.
Used SWR bridge or Three port connect.
Standing wave bridge measurement method:
Swr bridge test:
Standing wave ratio can be measured by bridge, and it can be measured qualitatively. It should be noted that the frequency sweeper can only use standing wave bridge with radio frequency output, but can not use bridge with detection output.
Used the SWR bridge can be measured in Bobbi, can qualitative measurement, need to pay attention, frequency sweep meter Can only use Of bridge with the RF output, not with the bridge band detection output
Three way measurement
three port connect
The three-way bridge instead of standing wave bridge can also be used for measurement, but only for comparative measurement, not qualitative.
Used three ports connect replace SWR bridge, can test antenna, only for compare test.
6,What should we pay attention to when using the frequency sweeper?
Attention of Sweep analyzer in used
Due to the need to connect with the computer and the device to be tested, it is necessary to pay attention to whether the grounding is good or not.,Detection terminal can not input too high level, otherwise it will damage detection components..
Connet with computer, DUT, so need to pay attention to ground is good, not too high level input end of the detection, otherwise it will damage the detection element.
7,IfUSBWhat to do if the power supply is insufficient
USB port power supply is not enough, how to do?
USB2.0The power supply current in the protocol is0.5AThat's enough for the equipment. If there is still insufficient power supply, it should be checked.USBAre the connection wires in good contact, or replace better quality wires, or replace them toUSB3.0Interface use (power supply current)0.9AOr an external power supply with sufficient power supply.USBHub.
According to the USB 2.0 protocol the current is 0.5A, is enough. if power supply is not enough, check USB cable connection is good, change a high quality USB cable, change to USB 3.0 port (current is 0.9A), use an extern power supply USB HUB.
8,If the impedance of the instrument does not match the impedance of the device under test, what will be the problem and how to solve it?
The impedance is not match, any problem, how to solution.
Impedance mismatch, power failure100%Transmission and reflection will result in incorrect measurement parameters (gain, fluctuation, insertion loss, bandwidth) and other parameters. It is possible to consider additional transformers or resistors for impedance matching, and then measure.
The impedance mismatch, power is not 100% transmission, reflection. Will cause the measured parameters (gain, fluctuation, insertion loss, bandwidth) and other parameters are incorrect, can consider the external transformer or resistance as impedance matching, then
9,I need to improve the accuracy of the input and output impedance of the instrument.
I need to improve the input and output impedance precision, how to do,
Attenuators can be added to the input and output of the instrument. Attenuator values are generally3DB,If you want to be more precise, you can replace it with10DBThe disadvantage of attenuators with higher values is loss dynamics.
Insert the attenuator in the instrument input and output, attenuator normaly is 3DB, if you want to be more precise, can be replaced by 10DB or higher number attenuator, the disadvantage is loss of dynamic.
