If vscope-nom = 1 V and Equation 3-125 is solved for Bnorm(t), then
Bnorm = 1.92 x 104 Wb m 2 V1 (3-126)
If Bnorm is expressed in units of gWb m 2, then Equation 3-126 becomes
Bnom = 192 gWb m2 V 1 (3-127)
Thus, nominally, one volt present at the input of the digitizer corresponds to a
magnetic field amplitude of about 190 gWb m2
The exact same loop antennas were used for the 2002 experiment, hence again
Aloop = 0.533 m2. Gpic was set to approximately 0.316 (-10 dB). Again, Glink is
assumed to have a nominal value of one. Also, as described above, a different type of
active integrator was used, having a nominal integration constant, kint, of approximately
2.5 x 105 s1. Unlike the 2001 configuration, the output of the active integrator was
terminated, through the PIC controller, in 50 Q, and hence RFOT = 50 Q. Since
Rout = 50 Q, RFOT/(Rout +RFOT) = 0.5. Therefore, the expression for the nominal
voltage seen at the input of the digitizer during the 2002 experiment, when Bnorm(t) is
expressed in units of Wb m 2, is given by
Vscope-nom(t) = (-10500)Bnorm(t) (3-128)
If Vscope-nom = 1 V and Equation 3-128 is solved for Bnorm(t), then
Bnorm = -9.5 x 105 Wb m V1 (3-129)
If Bnorm is expressed in units of kWb m 2, then Equation 3-129 becomes:
Bnorm = -95 gWb m 2 V
(3-130)