特点
直流至 50 MHz 带宽
1.2 米长电缆
7 ns 上升时间
10:1 衰减比
10 MΩ 输入电阻（1 MΩ 负载端接）
300 V RMS（或 > 400Vpk）CAT I 和 CAT II 最高输入电压
可与具有 1 MΩ 输入端的 Keysight InfiniiVision 和 Infiniium系列示波器兼容
Keysight N2840A 低成本无源探头具有 10:1 衰减比和 10 MΩ 大输入电阻。 这款探头可进行调节，提供低频补偿和高频补偿。
为得到尽量准确的测量结果，您应当对探头进行补偿，确保它的特征与示波器相匹配。
Probe characteristics | N2840A | N2862B/N2841A | N2863B/N2842A/N2853A | N2889A | N2890A/N2843A |
Bandwidth (–3 dB) | 50 MHz | 150 MHz | 300 MHz (N2863B, N2842A), 350 MHz (N2853A) | 350 MHz (at 10:1), 10 MHz (at 1:1) | 500 MHz |
Rise time (10 to 90%) | 7 nsec | 2.33 nsec | 1.16 nsec (N2863B, N2842A), 1 nsec (N2853A) | 1 nsec (at 10:1), 35 nsec (at 1:1) | 700 psec |
Attenuation ratio | 10:1 | 10:1 | 10:1 | 1:1/10:1 (switchable) | 10:1 |
Input resistance (when terminated into 1 MΩ) | 10 MΩ | 10 MΩ | 10 MΩ | 10 MΩ (at 10:1), 1 MΩ (at 1:1) | 10 MΩ |
Input capacitance | 15 pF | 15 pF | 11 pF | 11 pF (at 10:1), 60 pF (at 1:1) | 11 pF |
Maximum input voltage | 300 V RMS (or < 400 Vpk) mains isolated and CAT II | 300 V RMS (or < 400 Vpk) mains isolated and CAT II | 300 V RMS (or < 400 Vpk) mains isolated and CAT II | 300 VRMS (or < 400 Vpk) mains isolated/II (at 10:1), 150 V RMS CAT I/II (at 1:1) | 300 V RMS (or < 400 Vpk) mains isolated and CAT II |
Scope compensation range | 5-30 pF | 5-30 pF | 5-30 pF | 5-30 pF (at 10:1) | 5-30 pF |
Probe ID | Yes | Yes | Yes | No | Yes |
Cable length | 1.2 m | 1.2 m | 1.2 m (N2863B, N2842A), 2 m (N2853A) | 1.3 m | 1.3 m (N2890A), 1.2 m (N2843A) |
Safety | CAN/CSA-C22.2 No. 61010-031:17/A1:20 , ANSI/UL 61010-031, Edition 2 + AMD 1:2020, IEC 61010-031: 2015/AMD1:2018 | ||||
Operating temperature | 0 to +50 °C (N2862B/63B, N2889A, N2890A, N2840A/41A/42A/43A) | ||||
Storage temperature | 0 to +50 °C (N2862B/63B, N2889A, N2890A, N2840A/41A/42A/43A) | ||||
Humidity | 80% RH for non-condensing | ||||
Altitude | 2000m (indoor use only) | ||||
Pollution Degree | Pollution Degree 2 | ||||
