Chapter 16
Performing RFoCPRI Testing
JD700B Series User’s Guide
583
You can also turn the rotary knob.
6
To change the zoom-in span, complete the following steps:
Press the
Zoom-in Span
soft key.
Enter a value, and then press one of the unit soft keys that you want to select.
You can also turn the rotary knob.
NOTE
You can have the span as low as 10 kHz. An error message appears if you change the
zoom-in center frequency or span out of the range, which is automatically determined by
the instrument based on the sampling frequency.
7
To view a different position on the original spectrum, complete the following steps:
Toggle the
Zoom In
soft key to
Off
.
The screen goes back to the original spectrum.
Move the marker to a new position on the spectrum.
Turn the rotary knob to change the marker position.
Toggle the
Zoom In
soft key to
On
again.
The display refreshes with the new marker frequency centered in the current spectrum
view. You will notice “Zoom-in Frequency” at the bottom of the chart.
8
To disable
Zoom In
, toggle the
Zoom In
soft key to
Off
.
Figure 358 Zoomed-in spectrum view in RFoCPRI interference analyzer
Performing spectrum replayer
The Spectrum Replayer lets you retrieve and replay recorded spectrum analyzer traces in interference
analysis mode. These traces can be played back in the spectrogram or RSSI. You can configure the limit line
to create failure points when signals exceed it. The failure points are clearly displayed on the trace timeline
for quick access during playback.
Procedure
1
Press the
MEASURE
hot key.
2
Press the
Spectrum Replayer
soft key.
The file manager window appears.
3
Select a file to be loaded, and then press the
Load
soft key.
The Measure Setup menu appears.
4
Toggle the
Replay Direction
soft key between
FWD
and
REV
to change play direction to forward
