Keysight N9912-90001 User’s Guide 2- 5
Preparing for Initial Use of Your New FieldFox
Avoid Overpowering the FieldFox
— The temperature at which the following events occur is the average of the
RF1, RF2, SB1, SB2 temperatures. These temperatures come from internal
sensors embedded within FieldFox.
Temperature Control Mode
At approximately 73°C, the FieldFox enters Temperature Control mode by
reducing display intensity and measurement speed. This should decrease the
internal temperature which preserves measurement accuracy and maintains
the long-term reliability of the FieldFox.
When entering Temperature Control mode, save your instrument state and
data that you want to keep.
When the temperature drops to approximately 71°C, normal operating settings
are restored.
High-Temp Shut down
In extreme situations, Temperature Control mode may not stop an increase in
the FieldFox internal temperature. At approximately 75°C, High-Temperature
Shut down will engage and turn OFF the FieldFox.
Just prior to shut down, the FieldFox will display a warning of imminent shut
down.
Avoid Overpowering the FieldFox
The FieldFox can be damaged with too much power or voltage applied.
Exceeding the maximum RF power levels shown below will cause an ADC Over
Range message to appear on the screen.
Measurement speed specifications do NOT apply in Temperature Control
Mode.
Maximum Input Voltages and Power:
— RF OUT Connectors: ±50 VDC, +23 dBm RF
— RF IN: ±50 VDC, +27 dBm RF
— DC Input: 19 VDC, 4 ADC
— Learn more about Maximum power and voltages in the FieldFox Data
Sheet on page B-3
.
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