Keysight FieldFox A Series User Manual

254 Keysight N9927-90001 User’s Guide
IQ Analyzer (IQA) – Option 351 (CPU2 Only)
I/Q Analyzer (IQA) Mode Settings
— Ref Level Manually set the value of the reference line. Enter a negative
value by pressing Run/Hold (+/-)
either before or after typing a value. Use
acquisition in combination with the RF attenuator and the Preamp so that
the signal at the acquisition is at the optimum level for the FieldFox
(Spectrum and RF Envelope Only). This can also change the RF Attenuation
setting (default: 0). See “Attenuation Control” on page 254.
— Ref Pos
Manually set the position of the reference line. Values must be
between 0 (TOP line) and 10 (BOTTOM line). Default position is zero (top)
(default: 0, minimum: 0, maximum: 10).
— More
, then
— Unit
Sets the display units.
Attenuation Control
Both the RF Attenuation and Preamp functions control the power level into
the FieldFox mixer.
When too much power is present at the RF Input port, ADC Over Range
appears on the FieldFox screen. This does not necessarily mean that damage
has occurred, but that the receiver is probably compressed.
When high power levels are present at the RF Input port, internal attenuation
can be switched in to keep the FieldFox receiver from compressing. At
extremely high power levels, use external attenuation to protect the internal
circuitry from being damaged.
The displayed power level is automatically adjusted for RF Attenuation. As the
attenuation value changes, the displayed power level should NOT change.
How to set Attenuation
—Press Scale/Amptd
.
—Then RF Atten Auto Man
.
— Auto
RF Attenuation is set by adjusting the input power level. As the
acquisition is lowered, for example from –10 dBm to –30 dBm, the FieldFox
assumes that you are looking at low-level signals. The RF Attenuation value
is automatically lowered in 5 dB steps to allow low-level signals to be
viewed.
— Man
RF Attenuation is set manually. The default Attenuation setting is
10 dB. Enter a value between 0 to 30 dB in 5 dB steps using the numeric
keypad, the arrows, or the rotary knob. Then press Enter
The FieldFox can be damaged with too much power.
RF Damage Level: +25 dBm (N995xA & N996xA) and +27 dBm (all others)
DC Damage Level: ±50 VDC

Keysight FieldFox A Series Specifications

General

Brand	Keysight
Model	FieldFox A Series
Category	Measuring Instruments
Language	English