Attenuation 1:1 Gain error less than 0.02% Operating common mode voltage range: -280V to +280V Maximum input voltage: ±300V (±500V max. 10s) Powered directly from oscilloscope
The EA121 Differential Probe is optional equipment for the ETC M520 and M570 oscilloscope families. It can be connected to any measuring channel and it is powered directly from the oscilloscope. A flat connection cable for power is included.
A unique feature of the EA121 probe is the exceptionally high operating common mode voltage together with a 1:1 attenuation. Thanks to these features, it is possible to measure differential voltages of tenths of millivolts amplitude while common mode voltage is up to 280V.
The box measures 58 × 25 × 97 mm.
|Performance Characteristics |
|Number of channels||1 |
|Type of input||Differential |
|Gain error at 20 °C||<0.02% |
|Gain versus temperature||0.001% / °C |
|Output DC offset for common mode voltage = 0V||<1.1mV |
|Common mode voltage rejection (f < 10kHz)||<90dB (<32µV/V) |
|Differential input resistance||800 kΩ typical |
|Input resistance to ground of the oscilloscope||400 kΩ typical |
|Operating range of differential input voltage||-14V to +14V (fmax 38 kHz) |
-1V to +1V (fmax 500 kHz)
|Operating common mode voltage range||-280V to 280V |
|Absolute maximum input voltage||-300V to +300V continuously |
-500V to +500V max 10s
|Supply current||< 45 mA and 5V |
The differential voltage input range depends on frequency as shown in the above table. Up to ±1Vdiff (2Vpp) the limit is the -3dB drop of attenuation. For higher differential voltages the limit is the harmonic waveform distortion of 1%.