Description
Characterizing an LED or a laser diode normally calls for a voltage source, a current source and a meter. The Keysight B2901C source measure unit folds all three into one channel. It reaches 210 V and 3 A DC, and it resolves current down to 100 fA. Lost in HCM lists it for rental and sale, so you can book it for a study or keep it on the bench.
Three instruments in one channel
Four-quadrant operation means the channel can source and sink in both polarities. Therefore a single unit replaces separate voltage, current and meter instruments. The same channel also reads back what it applies, so each sweep point carries a measurement. Current resolution reaches 100 fA, which suits low-current semiconductor and materials work.
Keysight B2901C source measure unit numbers
| Item | Value |
|---|---|
| Channels | 1 |
| Maximum voltage | 210 V |
| Maximum current | 3.0 A DC or 10.5 A pulse |
| Minimum current measurement resolution | 100 fA |
| Maximum sample rate | 50 kSa/s |
| Minimum sampling interval | 20 microseconds |
Pulses and digitizing
Pulsed current reaches 10.5 A, well above the 3 A DC limit. In addition, the digitizer samples as often as every 20 microseconds. That speed shows transients that slow DC readings would average away. A graphical display, SCPI control and PC software support both bench use and automation.
Jobs that suit one channel
The Keysight B2901C source measure unit handles I-V curves on discrete semiconductors. It also tests LEDs, laser diodes and photovoltaic cells, and it supports battery, sensor and materials research. In addition, automated component screening and production test lines can script it. Pick this model when one channel is enough. If your device needs two biases at once, a dual-channel unit may suit better.
Put the accessories in the order
At 100 fA, cables and fixtures decide the result. So list your leads, adapters and probes along with the device type. Then state whether you want a rental or a purchase. A rental suits a study with a clear end date, while a purchase suits a permanent bench. Next, request a quote from Lost in HCM. You can also browse the source measure unit category, read the Keysight website or contact SMK Vietnam.
B2901C questions
How fine a current can it resolve?
The minimum current measurement resolution is 100 fA, so it suits leakage work.
Does it have a second channel?
No, because this model has one channel.
What is the shortest sampling interval?
It is 20 microseconds, which matches a maximum rate of 50 kSa/s.
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