The four channel D360R-4 has been designed to meet all of the electrical requirements of the medical electrical standard IEC 60601-1, including but not limited to:-

(i) full electrical isolation of the input circuit

(ii) meeting of or exceeding creepage and clearance minimum requirements

(iii) ensuring inputs are single fault condition safe.

Unlike the 8-channel D360, the D360R-4 is NOT a medical device and its use is limited to animal or human research applications.

The D360R-4 comprises a main amplifier unit, a remote pre-amplifier headstage with 4 pairs of differential inputs (plus Common) and dedicated Windows-compatible Client Software.  The software provides a virtual front panel for the adjustment of settings, including low-pass and high-pass filters as well as amplifier gain. The pre-amplifier headstage is attached to the main amplifier via a fully detachable 2m long cable, which is easily replaced if it becomes damaged during use.

The D360R-4 provides software and hardware de-block capabilities which can be useful to settle the amplifier inputs following electrode placement or re-positioning.  In addition, a TTL controlled de-block function allows a precisely timed external de-block to be applied in situations where a large stimulation artifact might obscure a short latency response.

Analogue signal outputs mean that the D360R-4 is fully compatible with a vast array of commercially available data acquisition systems.  As a result, the user can opt to employ their favoured data acquisition and analysis software. Signal outputs are available on the rear panel via a 9-way “D” connector. The D360R-4 is supplied with a “D” to multi-BNC cable for connection to BNC-based data acquisition systems.

The D360R-4 supports system expansion as multiple D360R-4 amplifiers can be connected to a single computer (via several USB sockets or hub) to allow multiples of 4 channels to be controlled through a single software interface.

SPECIFICATIONS

Headstage

The headstage is a small remote pre-amplifier to which the operator connects the electrodes from the subject to the amplifier. The head stage is small enough to be attached to a subject to permit partial mobility should this be required. The headstage is connected to the main amplifier using a 2m multi-way cable.  Digitimer can also supply a 5m long headstage cable (D990-53) where a greater distance is required between the main amplifier and headstage.

• 100MΩ Input impedance
• Independent channel enable/disable (Inputs are connected to COM when a channel is disabled)
• Single COM reference input (1.5mm touch-proof DIN42802 socket).
• Differential Channel Inputs (+ve [ref] –ve[act]), (Red & Blue 1.5mm DIN42802 touch-proof sockets)

Analogue Channels

• Maximum Channels : 4
• CMRR : ≥90dB

The following channel parameters can be independently controlled and are accurate to within ±5%:

• Gain : x100–x3,000,000 (10mV/V–0.33µV/V) 80 gains from x100 to x3,000,000
• Low Cut Filter: 0.05–255Hz, 05–2.5Hz (0.01Hz Steps), 5–62.0Hz (0.25Hz Steps), 62–255Hz ( 1.0Hz Steps)
• High Cut Filter: 20–25,500Hz, 20–1300Hz (5Hz Steps), 1300–25,500Hz (100Hz Steps)
• Notch Filter (50/60Hz) auto-detected based on mains frequency

Outputs

Analogue channel outputs are via a 9-way connector on the rear panel. An output lead is supplied, which breaks-out individual channels to 1m BNC terminated cable for connection to chosen acquisition interface.

Deblock

The deblock provides a means to remove excessive DC from the low pass series capacitors which in certain situations could block the signal. The de-block can be applied in using the Client Software/API, a button press on the headstage or using a precise TTL sync voltage connected to an input BNC on the rear panel.  Deblock is applied to all channels.

• Deblock button on headstage, applied whilst button depressed.
• Deblock can be applied using the Client Software or API.
• TTL BNC Input (2 modes)
  • Timed –  0.1ms – 10ms (0.1 steps) – triggered on rising edge of TTL BNC input
  • Gated– Deblock active for the time TTL BNC input is held high.

Software

Supplied D360R-4 Client Software compatible with Windows10 (32/64bit) and above.

Physical Size

Headstage: 134 x 76 x 39mm, weight: 0.255kg; Amplifier: 228 x 242 x 111mm, weight: 3kg

Safety

The D360R-4 is NOT a medical device and is intended for research use, however, it has been designed to meet all of the electrical requirements of IEC 60601-1, ensuring safety in human research. This includes but is not limited to:

• Input circuit is fully electrically isolated.
• Creepage and clearance meets or exceeds the minimum requirements.
• All inputs are single fault condition safe.

Power Requirements

Mains requirements: 120/240AVC (Switch selected) 50/60 Hz

D360R-4 Amplifier
Product Information

D360R-4 Amplifier
Control Software (Win)

D360R-4 Amplifier
Operator’s Manual