Tuesday, 13 September 2011

Impact printer..

Impact printer..

"strikes a ribbon against the paper to produce character image"

what generates a light beam at a specific visible frequency?

what generates a light beam at a specific visible frequency?

"Laser"

what is the frequency limit of an optical fiber?

what is the frequency limit of an optical fiber?

"40 GHz"

single sideband full carrier emission type..

single sideband full carrier emission type..


"H3E"

Sunday, 4 September 2011

Hyperbolic functions - sinh, cosh, tanh, coth, sech, csch

 Note: to set hyperbolic function in FX-991ES just select [hyp] and select the function that you need",)

Hyperbolic functions - sinh, cosh, tanh, coth, sech, csch

DEFINITION OF HYPERBOLIC FUNCTIONS

Hyperbolic sine of x = sinh x = (ex - e-x)/2
Hyperbolic cosine of x = cosh x = (ex + e-x)/2
Hyperbolic tangent of x = tanh x = (ex - e-x)/(ex + e-x)
Hyperbolic cotangent of x = coth x = (ex + e-x)/(ex - e-x)
Hyperbolic secant of x = sech x = 2/(ex + e-x)
Hyperbolic cosecant of x = csch x = 2/(ex - e-x)

RELATIONSHIPS AMONG HYPERBOLIC FUNCTIONS

tanh x = sinh x/cosh x
coth x = 1/tanh x = cosh x/sinh x
sech x = 1/cosh x
csch x = 1/sinh x
cosh2x - sinh2x = 1
sech2x + tanh2x = 1
coth2x - csch2x = 1


SSB means?

SSB means?

"Single Sideband with suppressed carrier"




The degree of selectivity desirable in the IF circuitry of a single-sideband receiver..

The  degree of  selectivity desirable in the  IF circuitry of a single-sideband receiver..

"2.4 k Hz"