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Frequency selective amplifier YS3892
YS3892 frequency selective amplifier (weak signal measurement amplifier) is a precision measurement amplifier capable of detecting weak signals YS3892
Product details
YS3892 frequency selective amplifier
One, summary
YS3892 Frequency Selection Amplifier (Weak Signal Measurement Amplifier)It is a precision measurement amplifier capable of detecting weak signals YS3892 frequency selective amplifier (weak signal measurement amplifier) is equipped with a signal source and measurement line for use, and can measure standing wave ratio, etc YS3892 frequency selective amplifier (weak signal measurement amplifier) is an indispensable device in microwave measurement systems
Secondly, Technical performance
1,Technical indicators
(1)Working frequency: 1000Hz, adjustable range not less than 40Hz
(2)Passband:16HZ~40HZContinuously adjustable
(3)Sensitivity: At a resistance of 200K ΩIn the case of full deflection of the electricity meter, the voltage should not be less than 50 microvolts when passing through the 16Hz frequency band
(4)Header scaleScale 0~1000mv
Decibel0~10db
Standing wave ratio 1~4~3~10
Non linear error: less than full scale5%
(5)Amplifier range:
0~60db, every 10db ±0.5db step
0~5db±0.2db
0~5db continuously adjustable
(6)Input impedance:200KΩ
(7)Power Supply: Communication~220V, 50HZ, 20W
(8)External dimensions:99mm(Height x 220mm (width) x 250mm (depth)
(9)Weight: About 3KG
2,Working conditions
(1)Environmental temperature:0~40degree
(2)Relative humidity:80%following
(3)Atmospheric pressure: One atmospheric pressure
(4) Avoid the influence of strong magnetic fields and mechanical vibrations
Three, The function of adjusting the structure
１， Power switch: Press the upper end of the power switch to turn on the switch indicator light, and the instrument enters the power on state. Press the lower end of the power switch to turn off the power of the YS3892 frequency selective amplifier (weak signal measurement amplifier)
２， Header: It is an indicator of the instrument, which can be used for indication with a scale of o~1000mv, attenuation indication with a scale of 0~10db, and standing wave ratio indication with scales of 1~4 and 3.2~10
３， Amplification selection switch: The range of this selection switch is 0-60db, with 10db as a step, for selection during measurement
４， Signal input connector: The connector is in BNC form, and the measured signal is received from this connector for instrument measurement and analysis
５， Gain control knob: This control knob can be connected and adjusted within the range of 0-5db. When adjusted clockwise, the gain is amplified; when adjusted counterclockwise, the gain decreases
６， Bandwidth control knob: This control knob can be continuously adjusted within the range of 16HZ to 40Hz. When adjusted clockwise, the bandwidth increases; when adjusted counterclockwise, the bandwidth decreases
7. Frequency tuning knob: When the YS3892 frequency selective amplifier (weak signal measurement amplifier) receives an input signal, the tuning knob can be adjusted to achieve maximum sensitivity of the instrument
Four, structure characteristics
The external dimensions of YS3892 frequency selective amplifier (weak signal measurement amplifier) are 220mmⅹ99mm x 250mm (b x d x h), the structure of the instrument adopts a profile frame chassis, which is easy to maintain and produce in terms of connection and composition. The preamplifier part adopts an electrical shielding structure to reduce the interference of stray electromagnetic fields. The back panel of YS3892 frequency selective amplifier is the input socket of the power supply
5、 Use
１，preparation
(1) Check if the voltage of the power supply is correct
(2) When the power is not connected, observe whether the pointer on the meter head of the instrument indicates zero. If there is a deviation from the zero point, adjust the mechanical zero adjustment knob on the meter head to make the pointer indicate zero
(3) Place the gain control knob in the middle position as much as possible
(4) The frequency tuning knob should also be placed in the middle position as much as possible
(5) After powering on, preheat for 10-30 minutes before conducting system testing
２，Use of instruments:
(1) The input signal is connected from the "signal input connector"
(2) Select the position of the "amplification selection switch" appropriately based on the strength of the measured signalThe signal amplitude that can be input in the db file is * large
(3) When the sensitivity of the instrument can meet the measurement requirements, a wider passband can be selected, which can make the performance of the instrument more stable
(4) Before each measurement, the "frequency adjustment knob" can be used to tune the frequency of the input signal and the selected frequency of the instrument to the optimal state. When adjusting, the position of the pointer on the meter head can be observed to determine, and the judgment is based on making the pointer indicate the maximum value at that time
(5) The "gain control knob" can be used together with the "amplification selection switch" to control the size of the signal amplification, so that the pointer on the meter head points to an appropriate position, providing a relative reference for measurement
３，Measurement of standing wave ratio: According to the general standing wave ratio measurement method, the standing wave ratio of the measured load can be directly read on the standing wave ratio scale 1-4 on the instrument head. When the standing wave ratio reading is greater than 3.2, the "amplification selection switch" can be adjusted clockwise by one gear, and then the standing wave ratio can be read on the standing wave ratio scale 3.2-10
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