158 Keysight N9938-90006 User’s Guide
SA (Spectrum Analyzer) Mode (Option 233–Mixed Analyzers)
SA Mode Settings
—
External Gain
Refer to
—
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).
How to Set Y-axis Units
The Unit setting appears for the reference line, marker readouts, and trigger
level. All Unit choices are available in both Log and Linear Scale Types.
The UNIT setting survives Mode Preset, but NOT Preset.
— Press
Scale / Amptd
, then
More
, then
Unit
— Then choose from the following:
—
dBm
(default setting),
dBmV
(dB milli Volts),
dBuV
(dB microVolts),
W
(watts),
V
(volts),
A
(amps),
dBmA
(dB milliAmps),
dBuA
(dB
microAmps).
Antenna correction units are available ONLY by loading or editing an Antenna
file that contains the desired units setting. Learn more in
.
External Gain
When using an external amplifier or attenuator, the SA mode trace amplitude
values can be offset to compensate for the effect of the external device. This
effectively moves the reference plane of the SA measurement port out to just
beyond the external device. For example, when using an external preamp with
gain of +10 dB, enter this value for External Gain, and the data trace across the
displayed frequency span will be adjusted down by 10 dB.
When RF Atten is set to Auto, you may see a change in the RF Attenuation
value. This is an attempt to measure the signal at top of screen (the
acquisition) without overloading the SA first mixer.
How to Set External Gain
1.
Press
Scale/Amptd
.
2.
Then
More
3.
Then
External Gain
4.
Enter a value using the numeric keypad, the
arrows, or the rotary
knob (positive for gain; negative for loss). Values less than 5 dB must be
typed using the numeric keypad. Then press
Enter
ExtGain xx dB
is shown at the top of the screen.
Summary of Contents for N9913B
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Page 572: ...572 Keysight N9938 90006 User s Guide Power Meter USB LAN Mode Option 302 Troubleshooting ...
Page 724: ...724 Keysight N9938 90006 User s Guide Noise Figure Mode Option 356 Troubleshooting ...
Page 858: ...858 Keysight N9938 90006 User s Guide Specifications Data Sheet ...
Page 861: ...861 Keysight Handheld Analyzers N99xxB User s Guide D Korean Battery Safety Translation ...
Page 862: ...862 Keysight N9938 90006 User s Guide Korean Battery Safety Translation ...
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Page 884: ...884 Keysight N9938 90006 User s Guide Keysight Software End User Licensing Agreement EULA ...
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