Tetrode Amplifier User Manual
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version 1.1
page 4
2. EXT-T2 Amplifier / Filter
2.1. System
Description
The EXT-T2 module is an amplifier/filter with headstages for two tetrodes, A and B. The
signals recorded from every single tetrode attached to the headstage are amplified and filtered,
and linked to the BNC connectors OUTPUT 0 to OUTPUT 3 for every tetrode. Every
OUTPUT is available at two BNC connectors. The GROUND plug provides system ground.
Measurements are done is single-ended configuration against GND.
2.2.
Description of the Front Panel
Figure 1: front panel view of EXT-T2
(1)
HEADSTAGE connector
Connector for the HEADSTAGE of TETRODE A
(2)
OUTPUT 0…OUTPUT 3 connectors
BNC connectors providing the amplified and filtered signals of tetrode A
(3)
GROUND connector
Banana jack providing system ground
(4)
POWER ON LED
LED indicating that POWER is switched ON
(5)
HEADSTAGE connector
Connector for the HEADSTAGE of TETRODE B
(6)
OUTPUT 0…OUTPUT 3 connectors
BNC connectors providing the amplified and filtered signals of tetrode A.
Every channel has a single PCB with amplifier and filters. Amplification factors (200, 500;
1000) and corner frequencies of high pass (0.1, 0.3, 1 Hz) and low pass (500, 2k, 8k Hz) filter
can be set internally at the PCB by DIL switches and a jumper (see also Table 1 and Table 2)
for each channel separately.
