Single-ended active probes contain a small, active amplifier built into the probe body near the probe tip. This arrangement makes it possible to keep the probe input capacitance very low, usually less than 2 pF. This low capacitance results in high input impedance on high frequencies. It has the best overall combination of resistive and capacitive loading. With such low loading, active probes can be used on high-impedance circuits that would be seriously loaded by passive probes. Active probes are the least intrusive of all the probes.
Probes
| Model | Type | Interface | Bandwidth | Attenuation | Input Z | Dynamic Range |
|---|---|---|---|---|---|---|
| N7024A | Single Ended | AutoProbe 1 | 6 GHz | 1.3:1 | 50 KΩ | ± 0.6 V (± 1.2 Vpp) |
| N7020A | Single Ended | AutoProbe 1 | 2 GHz | 1.1:1 | 50 KΩ | ±850 mV Active Signal Range (about offset voltage) |
| N7010A | Single Ended Active Termination Adapter | AutoProbe 2 |
30 GHz | 1.16:1 | 50Ω |
–0.6V≤(Vin –Vterm)≤+0.6V Input Signal Range |
| N2797A | Single-Ended Active Extreme Temperature |
AutoProbe 1 | 1.5 GHz | 10:1 | 1 MΩ, 1 pF | -8V to +8V |
| N2796A | Single-Ended Active | AutoProbe 1 | 2 GHz | 10:1 | 1 MΩ, 1 pF | ±8V |
| N2795A | Single-Ended Active | AutoProbe 1 | 1 GHz | 10:1 | 1 MΩ, 1 pF | ±8V |
| 1158A
Discontinued |
Single-Ended Active | AutoProbe 1 | 4 GHz | 10:1 | 100 kΩ, 0.8pF | 5Vp-p |
| 1157A
Discontinued |
Single-Ended Active | AutoProbe 1 | 2.5 GHz | 10:1 | 100 kΩ, 0.8pF | 5Vp-p |
| 1156A
Discontinued |
Single-Ended Active | AutoProbe 1 | 1.5 GHz | 10:1 | 100 kΩ, 0.8pF | 5Vp-p |
| 1155A
Discontinued |
Single-Ended Active | AutoProbe 1 | 750 MHz | 10:1 | 1 MΩ, 2 pF | NA |
| 1145A
Discontinued |
Single-Ended Active | BNC | 750 MHz | 10:1 | 1MΩ, 2 pF | ±6V |
|
1144A
|
Single-Ended Active | BNC | 800 MHz | 10:1 | 1MΩ, 2 pF | ±7V |