ADLINK PCI-9820 - Manual (Page 27)

Signal Connections
• 17
3.2 Analog Input Impedance Setting
3.2.1 Analog Input Impedance Setting
The CH0 and CH1 input impedance can be selected to 50Ω or 1.5MΩ by
soldering gap switches J6 and J7 on the backside of the PCI-9820. The lo-
cation of J6, J7 and the corresponded input impedance setting are shown in
Fig. 3.2 and Table 3.2. The default setting is 50Ω input impedance.
J6
CH0 Input Im-
pedance
J7
CH1 Input Im-
pedance
Open High (1.5M
Ω
) Open High (1.5M
Ω
)
Close
(Default)
Low (50
Ω
)
Close
(Default)
Low (50
Ω
)
Table 3.2: Location of solder switches
Figure 3.2: Location of solder switches