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Related parameters of attenuator
Aug 19, 2017

Related parameters of attenuator

1) attenuation: a quantity used to describe reduced signals from one end to the other during transmission. Expressed in multiples or decibels.

2) VSWR: equal to the ratio of characteristic impedance to the load impedance at the output of the transmission line.

3) maximum average power: at the output of the attenuator, when the characteristic impedance is applied, the maximum power at the specified maximum operating temperature can be applied to the attenuator input for a long time. When the operating temperature drops to 20&ordm, C, and the input power drops to 10mW, other indicators of the attenuator should not change.

4) the power factor of insertion loss: the variation of insertion loss (dB) when the input power is from 10mW to rated power.

5) maximum peak power: at the output of the attenuator, when the characteristic impedance is applied, at the specified maximum operating temperature, within the specified time, the maximum pulse power of the 5ms pulse width applied to the attenuator input is applied. When the operating temperature drops to 20&ordm, C, and the input power drops to 10mW, other indicators of the attenuator should not change.

6) temperature coefficient: the maximum change in insertion loss at the maximum operating temperature range, expressed in dB/º C.

7) shock and vibration: the attenuator must withstand shock and vibration tests in three directions.

8) the frequency response of the insertion loss: the variation of the loss value in the whole frequency range at 20&ordm and C (dB).

9) operating temperature limit: the maximum temperature at which the attenuator operates at the maximum input power (º C).

10) deviation of nominal insertion loss: deviation between the insertion loss and nominal value measured at 20&ordm, C, and input power 10mW.

11) joint life: the number of normal connections / disconnects; all electrical and mechanical indicators within the specified life span shall meet the requirements of the specifications.

12) intermodulation distortion: intermodulation distortion consists of spurious signals, which are caused by nonlinear factors in the device. Particular attention should be paid to the three order intermodulation distortion because the three order intermodulation product is the largest and cannot be filtered out. The test method of the three order intermodulation level is to inject two equal amplitude pure signals (F1 and F2) into the device under test, and the three order intermodulation will appear at the 2f1-f2 and 2f2-f1 of the output spectrum. The product of the three order intermodulation is defined by the magnitude of the F1 or F2, represented by -dBc.


CenRF Communications Limited
Add:9F, Dongguan Building, Jiangnan Ave 4288, Binjiang District, Hangzhou
Contact:Alan Huang
Tel: +86-571-86631886
Fax: +86-571-89930536
Mobile: +86-18969122786
E-mail: 
sales@cenrf.com

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