Description
VT-VPCD-1-15 Rexroth Servo servo amplifier
function
Amplification and filtering
The output of the pre-stage instrumentation amplifier is buffered into the secondary amplifier, which is the programmable gain amplifier PGA. The amplified signal has relatively flat frequency response characteristics after filtering. The filter is an 8th-order low-pass filter, whose cutoffs can be programmed from 10Hz to 100KHz, and the secondary filter is a second-order active low-pass filter, used to eliminate digital interference. The lower limit cutoff frequency is set by a pull switch. The low pass and band pass filters can be accessed or skipped by program control.
Zero level self-calibration
The self-calibration solution realizes the accurate zero level of the analog channel and eliminates the zero error under different gain and filter states. This calibration is automatically completed by the hardware, and relevant calibration parameters have been calibrated before delivery and stored in the EEPROM of the module. Users do not need to operate this function specially during normal use. Then the calibration software provided with the product should be run to complete the reset of calibration parameters.
Electronic signal transmission mode
In the downlink of the repeater station, the donor antenna picks up signals in the existing coverage area at ****, and makes a very good isolation of the signals outside the band through the bandpass filter. The filtered signals are amplified by the power amplifier and then transmitted to the area to be covered again. In the uplink link path, the mobile signal of the mobile station in the coverage area is processed by the uplink amplification link in the same way and transmitted to the corresponding ****, thus achieving the signal transmission between **** and the mobile phone. Types of repeater According to the actual application, commonly used can be divided into broadband repeater, frequency selective repeater, optical fiber repeater, frequency shift repeater, trunk amplifier. For other special applications, there are other types of repeater. As electronic equipment, repeater equipment in the operation process, in addition to some accidental failures caused by human factors, also often due to the impact of the environment, the sudden change of operating conditions and the aging of components and other reasons.
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