Temperature Control Mode - Keysight Technologies FieldFox A Series User Manual

Table of Contents

Preparing for Initial Use of Your New FieldFox

FieldFox High Temperature Protection

— The temperature at which the following events occur is the average of the

Temperature Control Mode

The FieldFox's internal temperature control preserves measurement accuracy

and maintains the long-term reliability of the FieldFox. See also,

Shutdown Warning (RTSA Mode Only)" on page

Measurement speed specifications do NOT apply in Temperature Control

Entering Temperature Control Mode

At an average internal temperature of above approximately 64°C, the FieldFox

enters Temperature Control mode by reducing display intensity. This should

decrease the internal temperature which preserves measurement accuracy and

maintains the long-term reliability of the FieldFox. Refer to

In addition, duty cycling is enabled when the internal average temperature of

the FieldFox reaches the duty cycling threshold of above ~64°C. All

applications (except RTSA): Power for internal circuitry is turned off between

sweeps and delaying occurs for the next sweep. In RTSA mode, power is only

turned off, if the FieldFox is in Single Sweep or Hold.

All applications (including RTSA): Display dims to 40% at ~64°C.

For all modes, except RTSA mode, you will see the following messages

displayed for ~3 seconds:

"Automatic Meas Duty Cycling activated for thermal

Later if the temperatures are reduced:

"Temperatures reduced, ending Automatic Meas Duty Cycling"

For RTSA mode (where duty cycling is not possible), you will see the following

messages displayed for ~3 seconds:

"Entering Auto Protect mode for thermal management"

Later if the temperatures are reduced:

"Temperatures reduced, exiting Automatic Protect Mode"

Entering Auto Protect (Maximum) Threshold Temperature Mode

At above approximately 75°C, the FieldFox enters (Maximum) Auto Protect

temperature control mode by displaying the "Entering Auto Protect mode...".

Table of Contents