07 | Keysight | Serial Bus Options for InfiniiVision X-Series Oscilloscopes - Data Sheet
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.
Table 1. Recommended probes for differential buses
Differential bus (max bit rate)
CAN (1 Mbps)
CAN FD (10 Mbps data phase)
FlexRay (10 Mbps)
MIL-STD 1553 (1 Mbps)
ARINC 429 (100 kbps)
RS422/RS485 (10 Mbps)
Hi-speed USB (480 Mbps)
N2791A (25-MHz bandwidth)
X
N2818A 1 (200-MHz bandwidth)
N2750A (1.5-GHz bandwidth)
X
X
X
X
X
X
X
X
X
X
1. The N2818A differential probe is not compatible with Keysight’s InfiniiVision 2000 X-Series oscilloscopes.
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.
Figure 12. Keysight’s N2818A 200-MHz differential active probe.
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.
Figure 14. Keysight’s N2750A 1.5-GHz InfiniiMode differential active
probe.
Figure 13. The N7013A extreme temperature probing kit for differential
probes.
KEYSIGHT [ Keysight Technologies ]
