Software Configuration; Battery Information; Device Specifications - TDT Medusa4Z Quick Start Manual

Setup Option
Active Channels Single or Four Channel
Sample Freq 3 kHz (1500), 6 kHz (3 kHz),
12 kHz (6 kHz), System Rate
Impedance Frq 100 Hz, 300 Hz, 500 Hz, 1 kHz
Highpass Filter Off, 1 Hz, 3 Hz
Auto Shutdown Never, 1 hour, 3 hours, 5 hours

Software Configuration

Medusa4Z_Input
Maximum Voltage In
S/N (typical)
Input Referred Noise
(μVrms)
Sample Delay
Battery
Important: You must use TDT Software (Drivers/RPvdsEx or BioSigRZ)
version 92 or later to use the Medusa4Z
In RPvdsEx (OpenEx, Synapse)
Output-1
Output-2
Output-3 Use the Medusa4Z_Input Macro. Set the number of desired channels.
Output-4
The macro does not account for sample delays.
+/- 10 mV
80 dB
Depends on Medusa4Z sample rate and electrode impedance
Medusa4Z Rate Shorted
3 kHz 0.15
6 kHz 0.25
12 kHz 0.3
25 kHz 0.4
Dependent on Medusa4Z and RZ processor sample rates
(RZ at 25 kHz)
Medusa4Z rate Samples
25 kHz 24
12 kHz 42
6 kHz 76
3 kHz 146
Li-Poly Battery 5 Ah capacity. Single channel mode, 30 hours between charges. Four
channel mode, 24 hours between charges. 1000 cycles of charging, not removable by user.
Notes
In single channel mode, unused channels are shorted to ground
System Rate is the processor's rate up to 25kHz
The number in ( ) represents the frequency content that can be
acquired at the Sample Freq without aliasing.
This is the probe frequency for checking the impedance of
electrodes
'Off' is a 0.1 Hz filter. There is a fixed 0.3Hz high pass analog
filter on the inputs
After a period of inactivity, the Medusa4Z will shut itself off to
preserve power. Press Power to re-energize after Auto Shutdown.
In BioSigRZ:
Setup → Acquisition → Setup Inputs → Source →
Medusa4Z
To avoid sample delays in your data trace, you must
match acquisition rate in BioSigRZ to the Medusa4Z
hardware Sample Freq (cycle Setup → Sample Freq
→ cycle Option). 25 kHz in BioSigRZ will be
System Rate on Medusa4Z.
* 12kHz recommended for ABRs
Note: This software setting does not set the hardware
sampling rate.
3 kOhm
0.3
0.4
0.6
0.9
(RZ at 12 kHz)
Samples
N/A
24
42
76
10 kOhm
0.5
0.7
1.0
1.4
(RZ at 6 kHz)
Samples
N/A
N/A
24
42