CellAdvisor 5G User's Guide
131
Freq/Time/Power Variation
Frequency, time, and power variation shows the frequency, time, and power error trend based on the time elapsed.
After configuring spectrum measurement in "
Configuring Spectrum Measurements
", you can set the measure setup to continue your
measurement. The measurement settings can be saved and recalled as a file by selecting File Type as Setup and load the file onto
the instrument using the
Save/Load
icons on the side bar.
1
Tap the
Setup
(
)icon on the side bar.
2
Tap
Bandwidth
and select the value from the following choices:
1.4 MHz
,
3 MHz
,
5MHz
,
10 MHz
,
15 MHz,
or
20 MHz
.
3
Tap
Subframe Number
and input the value from 0 to 9 using the on-screen keyboard.
4 Optional.
Tap
Physical Cell ID
and select the type
Manual
or
Auto
.
▪
Auto
lets the instrument detect the Physical Cell ID for the LTE signal automatically.
▪
Manual
sets the specific Physical Cell ID for the LTE signal manually in order to speed up the synchronization with a
BTS.
5
Tap
to switch
PCI (Physical Cell ID)
to
Manual
or
Auto
.
6
Optional.
Tap
CFI
and select the type
Manual
or
Auto
.
▪
Auto
lets the instrument set the number of OFDM symbols used for transmitting PDCCHs in a subframe.
▪
Manual
sets the number of OFDM symbols manually. The set of OFDM symbols that can be used for PDCCH in a
subframe is given by
0
,
2
,
3
or
4
in 1.4 MHz bandwidth and
1
,
2
, or
3
in other bandwidths.
7
Optional.
Tap
PHICH Ng
to set the number of PHICH groups (Ng):
1/6
,
1/2
,
1
,
2
,
E-1/6
,
E-1/2
,
E-1
, or
E-2
.
8
Tap
EVM Detection Mode
and select
Single
or
Combine
.
▪
Single:
Testing on one single antenna connected to your CA5G series with a cable
▪
Combine:
Testing on multiple antennas connected to your CA5G series with a 2x1 or 4x1 combiner or an antenna
NOTE
If you want to set the reference level and scale, tap
Menu
>
Amp/Scal
e >
Reference
. You can set Reference Freq
Error Offset, Scale Division (Freq Error), Reference Time Error Offset, Scale Division (Time Error), Reference
Level, and Scale Division (Power) on demand using the on-screen keyboard. You can also select the unit on the
keyboard.
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