Getting Acquain
tedwithYourInstrument
Input Connectors
1. Input A and Input B connectors, and input trigger indicators.
2. G ate indicator. The GATE indicator is on when the counter is busy c ounting input cycles.
3. Input C prescaler (3 G Hz or 20 GHz, FCA3000 Series and FCA3100 Series) or down converter (27 GHz or 40 GHz,
MCA3000 Series) for measuring higher frequencies.
NOTE. Ins
truments with Option RP have the input connectors on the rear panel (FCA3000 Series and FCA 3100 Series
instruments only). The Gate and Trig A/B LED indicators remain on the front panel.
Prevent
ing ESD
CAUTION. A direct electrostatic discharge can damage the i nstrument input. To learn how to avoid this damage, read
the following information.
Electrostati
c discharge (ESD) is a concern when handling any electronic equipment. The instrument is designed with ESD
protection, however it is possible that large discharges of static electricity directly into the signal input may damage the
instrument. To avoid damage to the instrument, use the following techniques to remove electrostatic charge from yourself
and test cabl
es before connecting any cables to the instrument:
Discharge th
e static voltage from your body by wearing a grounded antistatic wrist strap while connecting and
disconnecting cables.
A cable that is left unconnected on a bench c an develop a large static charge. Discharge the static voltage from all
cables before c onnecting them to the instrument or device under test by momentarily grounding the center conductor of
the cable, o
r by connecting a 50 Ω termination to one end, before attaching the cable to the instrument.
FCA3000, FCA3100, and MCA3000 Series Quick Start U ser Manual 5
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