The LeCroy WavePro 700Zi series oscilloscopes with bandwidths of 4 to 6 GHz include universal ProBus/ProLink probe interfaces. As shown in Figure 1, each channel has a high bandwidth ProLink connector and a 50 Ohm/1MOhm ProBus connector. This unique interface provides the user with the greatest flexibility in probe selection in any oscilloscope.
The ProLink inputs provide a high integrity, high bandwidth interchangeable interface to SMA cables, LeCroy ProLink probes, and accessories. ProLink is used for higher bandwidth probes.
The ProBus interface offers both 50 Ohm and 1 MOhm input impedance and provides probe power and control for a wide range of probes such as high impedance passive probes, high impedance active probes, current probes, high voltage probes, differential probes. ProBus also includes sense rings for detecting passive probes. All scopes with bandwidths over 4 GHz, except the WavePro 740Zi and760Zi, use 50 Ohm inputs and provide 1 MOhm impedance by means of external adapters.
Figure 2 shows a typical channel setup. The input selection is on the left hand side of the dialog box. In this case the A input, the ProLink interface is selected. Each input selection has its own independent settings for Probe attenuation, bandwidth and coupling. The setup for the ProBus interface is shown in Figure 3. This interface also allows the selection of input impedance, 50 Ohms or 1 MOhm.
Another advantage of the universal probe interface is the ability to switch between two probe setups. This function is remotely programmable allowing the interface to operate like a switch.
The characteristics of the universal ProBus/ProLink Interface are shown in Table 1. Each of the interfaces provides power to the probe. An I2 C interface allows communication with the probe which permits probe recognition and interaction. This adds to the flexibility of the system as the scope can sense and control each probe.
Table 2 lists the compatible probe types for each of the probe interfaces.
The WavePro 740Zi and 760Zi oscilloscopes offer the universal ProBus/ProLink probe interface which allows dual inputs in the DC to 3.5 GHz range and a dedicated high bandwidth interface in the range of 4 through 6 GHz.
The ability to select four out of eight inputs provides unheard of connection flexibility and eliminates the need for costly, easy to lose ‘adapters’.