ELAN Home Systems ES370 User Manual download pdf (Page 38)

Isolation rating: 300V CAT II, 500V CAT I between BNC

ground and USB ground

Transient isolation

: BNC ground to USB ground +/-2.5KV

Isolation capacitance

: 1000pF typ between BNC ground and USB

ground

Maximum Measured Voltage: Between BNC center and BNC ground: +/-30V.

Absolute Maximum Input Voltage

: Between BNC center and BNC ground: +/-50V.

4.4.2 Static Performance

Input DC resistance: 1Meg Ohm ±2%

Input capacitance: 16pF ±10% at 1MHz

Range accuracy: +/-0.3V range: ±4%

+/-3.0V range: ±6%

+/-30.0V range: ±6%

Input coupling modes: AC, DC, GND

ADC vertical resolution: 8bit

Channel offset error: ±2% of range

Channel offset control: ±100% of range, approx 7bit resolution

Buffer depth: 3000 points

Pre-triggering: Up to 99% of buffer depth

Post-triggering: Up to 100% of buffer depth

Triggering: Auto, normal, rising edge, falling edge, greater,

less

Trigger delay: From 0 to 65535 sample periods

Trigger range: ±100% of range, approx 7bit resolution

This figure derives from the 300V CAT II isolation rating and defines the peak transient voltage that

can be safely tolerated between the BNC ground and the USB ground.

This capacitance causes the impedance across the isolation barrier will reduce with frequency. This

is only significant if an AC component is impressed between the BNC ground and the USB ground that

is referenced to the USB ground. At 50/60Hz this impedance is approximately 3MegOhms.

This level will saturate the scope input, and is the maximum that can be applied without causing

damage to the scope. It applies regardless of the input attenuator or coupling setting.

Single shot mode only

Elan Digital Systems Ltd. 38 USBscope50 USER’S GUIDE Iss5

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ELAN Home Systems ES370 User Manual Page 38