A question on sizing a blocking capacitor
I do not know the circuit you are working on, but if you are putting a DC blocking capacitor in the input, then the capacitor will create a highpass filter with the input impedance of the circuit. For optimizing the value of the capacitor you need to know your input impedance. 

The highpass filter will have a cut off frequency. This frequency is given by:
f=1/(2*piRC)
Where R is your input impedance and C is your capacitors capacitance.

Normally you want to have a cutoff frequency one decade lower than the wanted frequency (for a highpass filter). In your case, this is 100 Hz.

This circuit:

Will give this response:


As you see it will have very close to no attenuation at 1k Hz. This, beacuse the cutoff frequency is 100 Hz.