07 | Keysight | Serial Bus Options for InfiniiVision X-Series Oscilloscopes - Data Sheet

Figure 12. Keysight’s N2818A 200-MHz differential active probe.

Figure 14. Keysight’s N2750A 1.5-GHz InfiniiMode differential active

probe.

Figure 13. The N7013A extreme temperature probing kit for differential

probes.

Probing Differential Serial Buses

Many of today’s serial buses are based on differential signaling including USB, CAN, CAN FD, FlexRay, MIL-STD 1553, and ARINC 429.

In addition, serial buses based on the RS232/UART protocol are often differential if implemented with RS422 or RS485 output drivers/

transceivers. Keysight offers a wide range of differential active probes compatible with the InfiniiVision X-Series oscilloscopes for

various bandwidth and dynamic range applications. Table 1 shows the differential probes that Keysight recommends for each of the

listed differential serial buses.

If you need to connect to DB9-SubD connectors on your

differential CAN, CAN FD and/or FlexRay bus, Keysight also offers

the CAN/FlexRay DB9 probe head (part number 0960-2926) is

shown in the inset picture of Figure 12.

When probing differential signals inside of environmental

chambers at extreme temperatures, Keysight offers the N7013A

extreme temperature extension kit shown in Figure 13. The

N7013A is compatible with the N2791A and N2818A differential

probes and can operate in temperatures ranging from -40

degrees to +85 degree Celsius. To learn more about this probing

solution, refer the Extreme Temperature Probing Solutions

selection guide (publication number 5991-3504EN) listed at the

end of this document.

The N2750A differential active probe shown in Figure 14, which is

recommended for hi-speed USB 2.0 measurement applications,

is based on Keysight’s InfiniiMode technology. With the press of

a button, you can quickly toggle between viewing the differential

signal, high-side signal, low-side signal, or the common mode

signal on the USB 2.0 hi-speed bus without moving probe

connections.

Table 1. Recommended probes for differential buses

Differential bus (max bit rate)

N2791A (25-MHz bandwidth)

N2750A (1.5-GHz bandwidth)

CAN (1 Mbps)

X

X

CAN FD (10 Mbps data phase)

X

FlexRay (10 Mbps)

X

MIL-STD 1553 (1 Mbps)

X

X

ARINC 429 (100 kbps)

X

X

RS422/RS485 (10 Mbps)

X

X

Hi-speed USB (480 Mbps)

X

1. The N2818A differential probe is not compatible with Keysight’s InfiniiVision 2000 X-Series oscilloscopes.