TDT RZ2 Manual page 478

11-4
The table below lists the input voltage ranges for the RA4LI headstage for either a
+/- 1.5 V or +/- 2.5 V power source.
Headstage input range when using +/-
1.5 V power source
+/- 33 mV
Headstage Technical Specifications
Warning! When using multiple headstages ensure that all ground pins are connected to a
single common node. See "Headstage Connection Guide" on page 6-93, for more
information.
Input Referred Noise
Headstage Gain
Highpass Filter
Lowpass Filter
Input Impedance
RA16LI ‐ 16 Channel Headstage
The sixteen channel low impedance headstage (RA16LI) is a high quality, low-
impedance headstage designed for recording high channel count EEG's.
The RA16LI headstage is designed for low impedance electrodes and electrode caps
with input impedance between <1 kOhm and 20 kOhm. Either headstage unit
connects to the Medusa preamplifier's 25-pin connector. The simple interface to the
RA16PA preamplifier makes it easy to connect your electrodes to our system.
An adapter is also available to connect a low impedance headstage to a PZ
preamplifier. See "Preamplifier Adapters" on page 12-33, for more information. A
built in impedance checker can be used to test each channel and the reference.
Additional 20x gain on the headstage improves signal-to-noise of low voltage
signals.
PreAmp
Connector
Low Impedance Headstages
Headstage input range when using +/-
2.5 V power source
+/- 80 mV
rms 0.1 μV bandwidth 300-3000 Hz
0.3 μ Vbandwidth 2-8000 Hz
20x
2.2 Hz
7.5 kHz
10 Ohm
6
System 3
Electrode
Connector