2007-09-16 19:07:13 · 4 answers · asked by yan yan 1 in Science & Mathematics ➔ Engineering
Gain is usually frequency-dependent. To the extent to which the frequency isn't stable and the gain near the frequency band isn't constant, the standard by which the gain is being measured is uncertain.
2007-09-16 19:40:33 · answer #1 · answered by devilsadvocate1728 6 · 1⤊ 0⤋
While the other answers have a point of validity, what are you using to measure gain with? Voltage gain can be measured with an oscilloscope using the device input as a reference point, and the output as the measuring point. This would give a voltage gain in terms of P-P for the device under test. If you want a standard test point, such as what is used in audio equipment, where 1KHz is used, then yes, you need to limit the signal source to that 1 frequency. If you want to know the over all band width gain of a device, then the easiest way is to use a sweep generator to pass several frequencies through the device and using an oscilloscope display with a calibrated graticule, measure the response of the circuit from the desired test points. Having a marker generator to set limits of observation is usually quite helpful.
2007-09-17 12:38:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋
gain =0
2007-09-17 02:12:47 · answer #3 · answered by ss 2 · 0⤊ 0⤋
Because gain is usually a function of frequency.
Doug
2007-09-17 02:29:29 · answer #4 · answered by doug_donaghue 7 · 0⤊ 0⤋