Signal Line

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Maximum Probe Input Voltage

Pod Thresholds

Connecting the Logic Analyzer to the Target System

Probing 2 - 8

Any signal line you intend to probe must be able to supply a minimum of 600 mV to the probe tip, which has an input impedance of 100 kΩ shunted by 8 pF. If the signal line is incapable of this, you will not only have an incorrect measurement but the system under test may also malfunction.

The maximum input voltage of each probe is ± 40 volts peak.

There are two preset thresholds and a user-definable pod threshold for each pod. The two preset thresholds are ECL (−1.3 V) and TTL

(+1.6 V). The user-definable threshold can be set anywhere between −9.9 volts and + 9.9 volts in 0.1 volt increments.

The pod thresholds of pods 1, 2, and 3 can be set independently. The pod thresholds of pods 4 and 5 are slaved together; therefore, when you set the threshold on either pod 4 or 5, both thresholds will be the same.

There are four ways you can connect the logic analyzer to your target system as previously mentioned at the beginning of this chapter: the probes (general purpose probing); the HP 10320C User-definable Interface; the HP 10269C with microprocessor specific preprocessor modules; and direct connection to a 20 pin 3M® Series type header connector using the optional termination adapter (HP Part No.

01650-63201).

Since the probe interface hook-ups are microprocessor specific, they will be explained in their respective operating notes. The rest of this chapter is dedicated to general purpose probing with the HP 16510B probes.

HP 16510B

Front-panel Reference