Model 900CT & 900BT instruments are single channel; 8-pole low-pass or high-pass front panel tunable filter instruments. The controls allow the user to select a corner frequency between 0.1 Hz and 49.9 kHz with a resolution of 1:499 for each of the four selectable ranges.
The instrument exhibits an input impedance of 1 M
shunted by 47pF to a single ended signal source. When configured in the differential mode, the instrument has a common mode rejection ratio (CMRR), which exceeds 60dB; in this mode the instrument presents an input impedance of 2 M's shunted by 47pF to a double-ended single source. Front panel gain control also enables the operator to select a gain factor of 0, 10, or 20dB.
Standard operational features include:
- Adjustable Frequency Control
- Differential Input Amplifiers
- Adjustable Gain Control
- Off-set Adjustment
- BypassControl
- BNC ConnectorsforSignal l/O