3-14 Electronic Calibration Modules Reference Guide
Operating ECal Module
ECal Troubleshooting
3-
ECal Troubleshooting
Table 3-4 N469xD/N443xD Troubleshooting
LED Color Description Possible Causes Solutions
Orange
ECal is connected
and functioning, but
is not
communicating with
driver software.
ECal module is connected to an
instrument (or PC) without the
appropriate driver software installed.
Connect the ECal module to a
compatible instrument.
Ensure that the instrument software is
up to date.
Faulty instrument USB port Connect to a different USB port on the
instrument.
Faulty USB cable Connect via a different USB cable.
Faulty USB hub Connect ECal directly to a USB port on
the instrument.
Alternating
Green/Orange
Flashing
ECal is too cold and
unable to regulate
internal temperature
to setpoint.
ECal is too cold and unable to
regulate internal temperature to
setpoint.
Move ECal to a warmer location. Refer
to “Environmental Specifications”
on page 5-2.
Alternating
Green/Red
Flashing
ECal is too hot and
unable to regulate
internal temperature
to setpoint.
ECal is too hot and unable to regulate
internal temperature to setpoint.
Move ECal to a cooler location. Refer to
“Environmental Specifications” on
page 5-2.
Off
The ECal is not
functioning.
ECal is not connected to instrument. Double check the USB connectors are
firmly inserted.
Faulty instrument USB port Connect to a different USB port on the
instrument.
Faulty USB cable Connect via a different USB cable.
Faulty USB hub Connect ECal directly to a USB port on
the instrument.
Faulty ECal module Return to Keysight for service. Refer to
Chapter 1, “Service and
Recertification” on page 1-23.
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