Keysight N9927-90001 User’s Guide 55
CAT (Cable and Antenna Test) Mode
2-Port Insertion Loss Measurements
13.
Press
Data Math
then
Data – Mem
. The ripple in the measurement is
removed. These minor imperfections in the cable should not be considered
in the Cable Loss measurement.
14.
Use Averaging to remove random noise from high-loss measurements.
Press
BW 2
then
Average
.
The displayed trace shows the Cable Loss values in one direction through the
cable. A Return Loss measurement would show the loss for both down the
cable and back. Therefore, a Cable Loss measurement is the same as a Return
Loss measurement divided by 2.
The average Cable Loss across the specified frequency range is shown on the
screen below the graticules.
2-Port Insertion Loss Measurements
A 2-port Insertion Loss measurement is used to measure the loss through a
DUT (device under test) – or cable – over a specified frequency range. The
FieldFox signal source is transmitted out the RF OUT connector, through the
DUT, and into the RF IN connector. Both ends of the DUT must be connected
to the FieldFox, either directly or indirectly using the cable used in the
normalization cal.
‘Insertion’ loss simply means
loss
through a device, usually expressed in dB. It
is exactly the same measurement as “S21 Transmission” in NA Mode.
2-port Insertion Loss measurements are generally more accurate than 1-port
Cable Loss measurements.
How to make a 2-port Insertion Loss Measurement
— Press
Mode
then
CAT
.f
— Then
More
then
Insertion Loss (2-Port)
.
— Press
Freq/Dist
and enter
Start
and
Stop
frequency values of the
measurement.
— Press
Sweep 3
, then select a
Resolution
setting.
— Press
Cal 5
, then perform a calibration. Learn more on
— Connect the DUT and view the insertion loss measurement results.
When measuring very long lengths of cable, it may be necessary to increase
the sweep time. Learn how on
Supplemental Online
Help
http://na.support.keysight.com/fieldfox/help/SupHelp/FieldFox.htm
Содержание N9913A
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Страница 56: ...56 Keysight N9927 90001 User s Guide CAT Cable and Antenna Test Mode 2 Port Insertion Loss Measurements ...
Страница 82: ...82 Keysight N9927 90001 User s Guide TDR Time Domain Reflectometry Option 215 TDR Measurement Settings ...
Страница 106: ...106 Keysight N9927 90001 User s Guide NA Network Analyzer Mode NA Mode Settings ...
Страница 142: ...142 Keysight N9927 90001 User s Guide Calibration for NA CAT and VVM Modes Calibration Method Summary ...
Страница 202: ...202 Keysight N9927 90001 User s Guide SA Spectrum Analyzer Mode Channel Measurements ...
Страница 262: ...262 Keysight N9927 90001 User s Guide IQ Analyzer IQA Option 351 CPU2 Only Other Features Available ...
Страница 286: ...286 Keysight N9927 90001 User s Guide Interference Analyzer SA Mode Option 236 Record Playback SA Option ...
Страница 292: ...292 Keysight N9927 90001 User s Guide Reflection Mode SA Models Option 320 Reflection Mode Settings ...
Страница 316: ...316 Keysight N9927 90001 User s Guide Frequency Offset Using Power Sensor FOPS Option 208 FOPS Settings ...
Страница 332: ...332 Keysight N9927 90001 User s Guide Pulse Measurements Mode Option 330 Pulse Measurement Settings ...
Страница 346: ...346 Keysight N9927 90001 User s Guide VVM Vector Voltmeter Mode Option 308 A B and B A Measurements ...
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