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P6434 Probe Instructions
Circuit Description
The P6434 probe contains 34 sets of signal connections (32 used as data channels
and two used as clock or qualifier channels). The probe tip connection is a 38-pin
Mictor connector by AMP, Inc. Each signal line has a 20 kW ± 1% resistor
(shunted by a 0.23 pF capacitor) in series with an approximately five foot long
section of 75 W coaxial cable.
Specifications
These specifications are for a P6434 probe connected between a compatible
Tektronix logic analyzer and a SUT. Table 6 shows the electrical requirements of
the P6434 probe.
Table 6: Electrical specifications
Characteristics Requirements
Number of input channels 34 (32 data and 2 clock/qualifier channels)
Input impedance
20 kW ±1% in parallel with 2 pF ± 0.2 pF
Threshold accuracy
±100 mV
Channel-to-channel skew <150 ps
Delay time from probe tip to module end 7.33 ns (The approximate length of the probe is
1.6 m or 62 in.)
Max. operating swing time 8 V peak-to-peak
Probe overdrive
The greater of ± 300 mV or ± 25% of signal
swing
Max. nondestructive input signal to probe
±15 V
Max. sync clock rate 200 MHz in full speed mode (5 ns between
active clock edges)
Min. sampling period 4 ns (0.5 ns w/MagniVu)
Measured typical signal loading* AC load DC load
[2 pF
[20 kW*
* The 20 kW resistor is returned to +2.2 V.
Table 7 shows the environmental specifications.