Boston Electronics Corporation, 91 Boylston Street, Brookline MA 02445
(800)347-5445 or (617)566-3821 * fax (617)731-0935 * boselec@boselec.com * www.boselec.com
Bartles Industrial Estate, North Street, Redruth, Cornwall TR15 1HR
Tel. (01209) 314608 E-mail: scitec@scitec.uk.com
Fax. (01209) 314609 Web: http://www.scitec.uk.com
signals are then passed through two low pass filters, the time constant for which are controlled
by the time constant control dial (3).
An offset can be added to each output signal be setting the output offset switch (6) to ON and
then selecting the required offset using the offset control dials (4)&(5).
A modulus or R circuit calculates the amplitude of the input signal independent of the phase
relationship between the input signal and the reference signal. This is achieved through
combining the X and Y outputs through the calculation
RXY=+
22
The output select switch (7) allows the selection of either the X, Y or R signals to be output
from the front panel BNC output connection (8) and to be displayed on the meter (13). The
individual X, Y and R outputs are available from three BNC connections on the back panel.
The output meter zero position can be adjusted by using a small screw driver in the hole below
the meter (14).
The top scale on the output meter, -1 to +1, can be used to directly read the output voltage. The
bottom scale, -3 to +3, is useful when using the input gain sensitivity to calculate the amplitude
of the input signal.
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