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
Figure 14 Signal Ground Connected to Case and Electrical Earth Jumper Position
This setting is the default as it provides the best noise performance.
4.3 Signal Ground Connected to Case and Electrical Earth Via 100Ω
ΩΩ
Ω Resistor
The signal ground and hence the ground connection for the reference BNC and output BNC
can be connected to the case ground and electrical earth via a 100Ω resistor by placing the
jumper as shown in Figure 15.
Figure 15 Signal Ground Connected to Case and Electrical Earth Via 100Ω Resistor Jumper
Position
This setting is useful where there are problems with earth loops.
4.4 Signal Ground Isolated From Case and Electrical Earth
The signal ground and hence the ground connection for the reference BNC and output BNC
can be isolated from the case ground and electrical earth by removing the jumper as shown in
Figure 16.
Figure 16 Signal Ground Isolated from Case and Electrical Earth Jumper Position
This setting is useful where there are problems with earth loops. The maximum differential
voltage between the signal ground and the case and electrical earth should be limited externally
to 50V when in this mode of operation.
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