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2 Installation
Keysight N678xA SMU Wiring
Because of the effect of wire inductance, the wire length information given in the
previous table does not apply to Models N678xA SMU.
To minimize the effect of wire inductance, the following table describes the allowable load lead and
wire length for several common output wire types. Using longer (or shorter) wire lengths than those
indicated in the table may cause output oscillation.
Cable Type
Twisted pair (AWG 14 or smaller)
50 ohm coaxial (RG-58)
10 ohm coaxial
(inductance per cable foot ≤ 32 nH)
High Bandwidth Modes with Remote Sensing
The following wiring requirements apply when using Keysight Models N678xA SMU in the High
bandwidth modes with remote sensing.
Refer to
Output Bandwidth
1. Load wires must be twisted-pair or coax and must not be twisted along with the sense wires. Refer
to the above table for length (L).
2. Sense wires must be twisted-pair or coax and must not be twisted with the load wires.
3. No capacitors are allowed within the sense-compensated load path.
58
Length in feet
1 to 4.25 feet
2 to 10 feet
8.5 to 33 feet
for more information about the bandwidth settings.
To module connector
Length in meters
0.3 to 1.3 meters
0.6 to 3 meters
2 to 10 meters
Keysight N6700C Series User's Guide
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