Date:
09-May-2019
Product name
RTX2018
File
: RTX2018 User Manual 1.0.docx
Ref.: FHA
Page: 21 of 34
This document and the information contained is property of RTX A/S, Denmark, and should be regarded as confidential.
Unauthorized copying is not allowed. The information in this document is believed to be correct at the time of writing. RTX A/S
reserves the right at any time to change said content, circuitry and specifications.
The BER/FER measurement is initiated using the
“Single” or “Continuous” button.
“Single” will
initiate a single measurement of BER up to the
“Number of Frames”.
“Contin
u
ous” will
initiate a continuous measurement of BER and will report for every
“Number of Frames”
chosen.
The BER/FER results are written in the boxes below:
•
BER is the Bit Error Rate measured in percent
•
FER is the Frame Error Rate. (Frame Error is defined as reception of a packet with
Sync Error and/or more than 25% BER in a single packet)
•
RSSI is the reported RSSI value from the DUT.
•
“Number of Frames” is the number of frames that the DUT
has tried to receive.
•
“BER State”
shows the current state of the DUT which can be:
o
“Idle”
- no measurement has been initiated
o
“Searching”
- the DUT is searching to obtain time synchronization
o
“Adjusting Frequency”
- the DUT is adjusting crystal frequency to be fully
synchronized
o
“Measuring”
- the DUT is receiving and calculating BER/FER
o
“Done”
- measurements are complete and the DUT is now idle
5.3
TX Measurements
The idea behind the TX measurements is to have the DUT transmit a number of TX packets (or
bursts). These TX packets from the DUT are then captured by the CMW100 measurement HW
and analyzed in the RTX2018 DLL.
The concept of TX measurements is that the CMW100 will capture a number of samples from
a trigger event. The trigger event is the rising edge of the power envelope of the measured
signal.
These samples are then transferred from the CMW100 into the analysis DLL for processing.
The TX parameters are then calculated and shown (see Figure 10 below).
The TX measurement are
divided into two tabs, the “TX GFSK” and “TX PSK”. The “TX GFSK” is
used to analyze signals with GFSK modulation which is the legacy DECT modulation scheme.
The “TX PSK”
tab (see Figure 10 below) is used to analyze the PI/2-BPSK, PI/4-QPSK and PI/8-
8PSK modulation schemes. These are the new modulation schemes supported by Dialog
Semiconductor
’
s DA14495 DECT chip.
