Description

Frequency Devices' 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:

1. Adjustable Frequency Control
2. Differential Input Amplifiers
3. Adjustable Gain Control
4. Off-set Adjustment
5. BypassControl
6. BNC ConnectorsforSignal l/O

An optional battery powered 900BT is particularly well suited to applications requiring isolation from an electrically noisy primary power source.

Compact size and manual rotary switch front panel controls make 900 instruments a popular, cost effective, easy-to-use solution for signal conditioning applications in the following areas:

• Anti-aliasing Filters
• Biomedical/Biotechnology Applications
• Data Recording/Playback
• Data Smoothing
• EKG/EEG Signal Filtering
• FDM/PCM Signal Filtering
• Medical Research
• Industrial Process Control
• Seismic Analysis
• Vibration Analysis