EXT-02F

EXT-02F-1: One channel plus audio monitor
EXT-02F-2: Two channels plus audio monitor

The EXT-02F has two differential inputs with high input resistance via BNC connectors or optionally with headstages. The output voltage signal is available AC or DC with variable gain (up to 10k), and can be filtered. The system is housed in a desktop metal case with an external power supply.
Two LEDs indicate whether the amplifier is running out of its linear range and an analog balance monitor makes the control of offsets easy. Furthermore, an audio monitor allows acoustic control of the recorded signal. The EXT-02F is also available as one-channel version.

The amplifer is suitable for single unit recording as well as for EEG and ECG recordings.

Features

EXT-02F-2: Two channel extracellular amplifier with audio monitor
  • Two differential inputs
  • Headstage available
  • AC or DC mode
  • Gain up to 10k
  • Lowpass and highpass filters
  • Notch filter (optional)
  • One or two channel version

Ordering

Part No. Description
EXT-02F-2 Extracellular amplifier with two channels, without headstages
EXT-02F-1 Extracellular amplifier with one channel, without headstage
EXT-HS Differential headstage for extracellular amplifier
EXT-N 50 Hz / 60 Hz Notch filter for extracellular amplifier
EH-01 Electrode holder BNC, without port

Tech. Data

HEADSTAGES (optional):
Operating voltage ±12 V; Size (approx.): 65x25x25mm
holding bar diameter 9 mm, length 150 mm
Electrode connector: BNC with driven shield
Ground connector: 2.4 mm connector or headstage enclosure
Reference connector: gold-plated SMB, grounded shield
Input resistance: >1012 Ω
Differential input: cmr >90 dB at 1 kHz (tested with 0 Ω input resistance).

AC/DC OUTPUT:
filtered and amplified
impedance 50 Ω

DIFFERENTIAL INPUT:
BNC / SMB connector with headstage or BNC connectors
CMR >90 dB
GND position for each INPUT
INPUT RESISTANCE (without headstage):
10E+6 Ω , range ±1 V (lower input resistance on request)

LOW PASS FILTER:
30, 100, 500, 700, 900, 1.3k, 1.5k, 1.7k, 3k, 10k, 20k Hz

HIGH PASS FILTER:

OFF, 3, 30, 100, 300, 400, 500, 600, 800, 1k, 3k, 10k Hz

NOTCH FILTER (optional):
50 Hz or 60 Hz

AUDIO MONITOR:
PITCH or NOISE, DC or AC
NOISE mode with THRESHOLD
channel selected by switch
connector external speaker / line

GAIN:
10, 20, 50, 100, 200, 500, 1k, 2k, 5k, 10k

OFFSET COMPENSATION:
Potentiometer with 2 ranges: ±0.1 V or ±1 V

MONITORS:
Impedance: 250 Ohms
GAIN: BNC connector, 1 V per step, +1 V....+7 V
FILTER: BNC connector, 1 V per step, -8 V....+7 V
COMMAND: BNC connector, sensitivity: x10

ANALOG BALANCE MONITOR:

ca. ±30 mV

EXTERNAL POWER SUPPLY:
AC output; 12-18V, 1 A

DIMENSIONS:

245 x 200 x 90 mm