Keysight N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes Data Sheet Oscilloscope users often need to make floating measurements where neither point of the measurement is at earth ground. Use the N2790A, N2791A or N2891A high-voltage differential probe to make safe and accurate floating measurements with an oscilloscope. The N2790A, N2791A and N2891A high-voltage differential probes allow conventional earth-grounded Keysight oscilloscopes to be used for floating signal measurements. 02 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet With a differential amplifier in the probe head, the N2790A is rated to measure differential voltage up to 1,400 VDC + peak AC with high CMRR (common mode rejection ratio) of >50 dB at 1 MHz. The N2791A and N2891A can measure differential voltage up to 700 V and 7 kV differential or common mode respectively. The N2790A, N2791A and N2891A differential probe offers sufficient dynamic range and bandwidth for your application to make the floating measurements found in power electronics circuits safely and accurately. The N2790A, N2791A and N2891A differential probe offers user selectable attenuation settings that make it highly versatile, allowing it to be used for a broad range of applications. The probe comes with probe tip accessories for use with both small or large components in tight places. The N2790A and N2891A also have an overrange indicator which alerts the user when the probe input exceeds the dynamic range of the probe. Figure 2. N2791A 25-MHz high-voltage differential probe with standard accessories The N2791A and N2891A are compatible with any oscilloscope with 1 Mohm BNC input. The N2791A and N2891A probe's power is supplied by included 4x AA batteries or USB host port of the scope or PC via a supplied USB power cable. The N2790A is compatible with the Keysight Technologies, Inc. AutoProbe interface where the probe's power is supplied by the Keysight oscilloscope's probe interface. Figure 3. N2891A 70-MHz high-voltage differential probe with standard accessories. Max number of Keysight oscilloscope compatibility N2790A probes supported by oscilloscope Figure 1. N2790A high voltage differential probe with standard accessories InfiniiVision 5000, 6000 (except 100 MHz), and 7000 Series with version 5.26.0001 software 4 InfiniiVision 3000 X- and 4000 X-Series 4 Infiniium 8000, 54830 Series with version 5.7 software 4 Infiniium 9000 Series with version 2.0 software 4 03 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet 6 Vout/Vin 3 Vout dB 0 -3 Vin -6 -9 BW (-3dB) = 147 MHz 106 107 Frequency (Hz) 108 Figure 4. Vout/Vin vs. frequency response of N2790A Figure 5. Frequency response (Vout/Vin) of N2790A when inputs are driven in common (common mode rejection) Figure 6. Input impedance vs. frequency of N2790A Vms 04 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet Frequency (Hz) Figure 7. Voltage derating curve of N2790A (voltage between either input and ground) Figure 8. Vout/Vin vs. frequency response of N2791A Figure 9. Frequency response (Vout/Vin) of N2791A when inputs are driven in common |(common mode rejection) 05 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet Figure 10. Input impedance vs. frequency of N2791A Figure 11. Voltage derating curve of N2791A (voltage between either input and ground) 06 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet Figure 12. Vout/Vin vs. Frequency response of N2891A at 1000:1 attenuation Figure 13. Frequency response (Vout/Vin) of N2891A when inputs are driven in common (common mode rejection) 07 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet Figure 14. Input impedance vs. Frequency of N2891A Figure 15. Voltage derating curve of N2891A (voltage between either input and ground) 08 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet Performance characteristics Product number N2790A N2791A N2891A Bandwidth (-3dB) 100 MHz probe bandwidth* 25 MHz probe bandwidth 70 MHz Rise time (calculated) 3.5 ns 14 ns 5 nsec Attenuation 50:1 / 500:1 10:1 / 100:1 100:1 / 1000:1 Gain accuracy (% of reading) 2% at 20-30C, 4% at 0-20C and 30-50C* DC CMRR -70 dB at 500 VDC AC CMRR -80 dB at 50/60 Hz -50 dB at 1 kHz -50 dB at 1 MHz -80 dB at 50/60 Hz -40 dB at 1MHz -80 dB at 50/60 Hz -60 dB at 20 kHz Propagation delay 14 nsec at 50:1, 12.8 nsec at 500:1 Input R//C (each input to ground) 4 Mohm // 7 pF 4 Mohm // 10 pF 50 Mohm // 7 pF Input R//C (between inputs) 8 Mohm // 3.5 pF 8 Mohm // 8 pF 100 Mohm//5 pF Max differential operating voltage (DC+PeakAC) 1400 V at 500:1 140 V at 50:1 700 V at 100:1 70 V at 10:1 7000 V at 1000:1 700 V at 100:1 Max common mode operating voltage (RMS or DC+PeakAC) 1000 V (CAT II) 600 V (CAT III) 700 V at 100:1 700 V at 10:1 7000 V at 1000:1 7000 V at 100:1 Max nondestructive voltage 1500 VDC + Peak AC differential mode 1300 Vrms (CAT II) common mode 1000 Vrms (CAT II) differential and common mode 7000 V (DC + Peak AC), 2500 Vrms @ 1:100 & 1:1000 in common mode or 5000 Vrms @ 1:100 & 1:1000 in differential mode (CAT 1) Output maximum voltage range 2.8V into 1 Mohm (500:1) 7V into 1 Mohm (100:1) 7V into 1 Mohm (1000:1) Scope's input impedance 1 Mohm AutoProbe interface 1 Mohm BNC interface 1 Mohm BNC interface Output offset Adjustable 7.5 mV (typical) 5 mV (typical) Noise referenced to input < 300 mVrms at 500:1 < 50 mVrms at 50:1 Temperature - operating -10 to 50C -10 to 40C -10 to 40C Temperature - non-operating -51 to 71C -30 to 71C -30 to 71C Humidity - operating 80% RH at 40C 25-85% RH 25-85% RH Humidity - non-operating 90% RH at 65C 25-85% RH 25-85% RH Operating altitude 2,000 m 3,000 m 3,000 m Nonoperating altitude 15,300 m 15,300 m 15,300 m Vibration Keysight class GP and MIL-PRF28800F class 3 random Shock Tip end: 400g 1/2 sine wave AutoProbe BNC End: 50g 1/2 sine wave Probe circuit box: Keysight class B1 and MIL-PRF-28800F class 3 Standard accessories - 2 each browser tips (black and red) - 2 each alligator plunger clips (black and red) - 2 each pincer clips (black and red) - 2 each of 4 colored ID tags - DC offset adjustment tool - manual - 2 each alligator clips (black and red) - 2 each hook clips (black and red) - USB power cord (2m) - 4 AA batteries - manual - 2 each high-voltage alligator clips (black and red) - 2 each safety hook adapters (black and red) - USB power cord (2m) - 4 AA batteries - manual Safety specifications IEC61010-031 IEC61010-031 IEC61010-031 * denotes warranted specification after 20 minute warm-up, all others are typical 09 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet Figure 15. Versatile probe tip accessories allow you to access small or large components in tight places. Ordering information Product number Description N2790A 100 MHz high-voltage differential probe N2790-68700 Probe tip accessory kit for N2790A including 2 each of browser tips, alligator plunger clips and pincer clips N2791A 25-MHz high-voltage differential probe N2791A-68700 Probe tip accessory kit for N2791A including 2 alligator clips and 2 hook clips N2891A 70-MHz high-voltage differential probe N2891A-68700 Probe tip accessory kit for N2891A including 2 high-voltage alligator clips and 2 safety hook adapters 0960-2926 CAN/FlexRay DB9 probe head for N2790A/91A/92A differential probe Keysight Technologies Oscilloscopes Multiple form factors from 20 MHz to >90 GHz | Industry leading specs | Powerful applications 10 | Keysight | N2790A 100 MHz, N2791A 25 MHz and N2891A 70 MHz High-voltage Differential Probes - Data Sheet myKeysight www.keysight.com/find/mykeysight A personalized view into the information most relevant to you. www.axiestandard.org AdvancedTCA(R) Extensions for Instrumentation and Test (AXIe) is an open standard that extends the AdvancedTCA for general purpose and semiconductor test. 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(c) Keysight Technologies, 2012 - 2014 Published in USA, August 2, 2014 5990-3780EN www.keysight.com