Keysight 是德科技 N2790A 高压差分探头，100 MHz
获得最高 1400 V 差分电压和最高 1000 V 共模电压的浮动信号测量
使用 N2790A 100-MHz 高压差分探头可以结合示波器进行安全和精确的浮动测量。 N2790A 探头允许使用传统的接地式是德示波器，可实现高达 1400 V 差分电压和 1000 V 共模电压的浮动信号测量。
由于其高带宽和出色的输入阻抗特性，该探头可以精确测量现代开关电源中高达 3.5 纳秒的快速瞬态边缘。
该探头与是德 AutoProbe 接口兼容，具有 1 Ω 输入，由是德示波器的探头接口供电。
在极端温度下探测环境舱内的差分信号时，是德科技提供 N7013A 极端温度扩展套件。 N7014A 与 N2790A 兼容，其降额带宽为 70 MHz。 70 厘米长的差分电缆组及附件所适用的温度范围为 -40 摄氏度至 +85 摄氏度。
主要特性：
包含的附件：
兼容的示波器：
Keysight InfiniiVision 3000 X 系列、4000 X 系列
Keysight InfiniiVision 5000、6000（100 MHz 除外）和 7000 系列，软件版本 5.26.0001 或更高
Keysight Infiniium S 系列
Keysight Infiniium V 系列、Z 系列、90000 X 系列和 90000 Q 系列，带 N5449A 适配器
Keysight Infiniium 8000 和 54830 系列，软件版本 5.7
Keysight 9000 系列，软件版本 2.0
N2790A 主要技术参数表
Product number | N2790A | N2791A | N2891A |
Bandwidth (−3 dB) | ≥ 100 MHz probe bandwidth 1 | ≥ 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 to 30 ºC |
| ± 4% at 0 to 20 ºC and 30 to 50 ºC 1 |
DC CMRR | –70 dB at 500 VDC |
AC CMRR | –80 dB at 50/60 Hz | –80 dB at 50/60 Hz | –80 dB at 50/60 Hz |
| –50 dB at 1 kHz | –40 dB at 1MHz | –60 dB at 20 kHz |
| –50 dB at 1 MHz |
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Propagation delay |
| 14 nsec at 50:1 |
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| 2.8 nsec at 500:1 |
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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 or RMS) | ± 1400 V at 500:1 | ± 700 V at 100:1 | ± 7000 V or 5000 Vrms at 1000:1 |
± 140 V at 50:1 | ± 70 V at 10:1 | ± 700 V or 700 Vrms at 100:1 |
Max common mode operating voltage (DC+PeakAC or RMS) | ± 1000 V (CAT II) | ± 700 V at 100:1 | ± 7000 V or 5000 Vrms at 1000:1 |
± 600 V (CAT III) | ± 700 V at 10:1 | ± 7000 V or 5000 Vrms at 100:1 |
Max nondestructive voltage | ± 1500 VDC + Peak AC differential mode | ± 1000 Vrms (CAT II) differential and common mode | ± 7000 V (DC + Peak AC) |
| ± 1300 Vrms (CAT II) common mode |
| ± 5000 Vrms at 1000:1 and 100:1 in differential and common mode (Main Isolated) |
Output maximum voltage range | ± 2.8 V into 1 Mohm (500:1) | 7 V into 1 Mohm (100:1) | 7 V 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 50 ºC | –10 to 40 ºC | –10 to 40 ºC |
Temperature - non-operating | –51 to 71 ºC | –30 to 71 ºC | –30 to 71 ºC |
Humidity - operating | 80% RH at 40 ºC | 25 to 85% RH | 25 to 85% RH |
Humidity - non-operating | 90% RH at 65 ºC | 25 to 85% RH | 25 to 85% RH |
Operating altitude | 2,000 m | 3,000 m | 3,000 m |
Nonoperating altitude | 15,300 m | 15,300 m | 15,300 m |
