Agilent Technologies E4428C, User Manual

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598 Chapter 17
W-CDMA Downlink Digital Modulation for Receiver Test
Configuring for Transmit Diversity and BERT
Making the BERT Measurement
This procedure demonstrates how to make W-CDMA transmit diversity BER measurements. Either ESG
can be configured to perform the BERT measurement as long as it has Option UN7 installed. For this
procedure, we are using ESG one as shown in the setup diagram. For more information on BERT
measurements see
Chapter 9, “BERT,” on page 263 .
Selecting the BERT Data Pattern and Total Bits
1. Access the BERT function.
For an ESG with Option UN7 Installed
Press
Aux Fctn
>
BERT
>
Configure BERT
.
For an ESG with Options UN7 and 300 Installed
Press
Aux Fctn
>
BERT
>
Baseband BERT
>
Configure BERT
.
If the
Data
softkey does not show that PN9 is the selected data pattern, press
Data
>
PN9.
The selected PN sequence must match the data PN sequence used on the channel being measured. For
example if the DCH (DTCH) is using PN9 data, then the data selection in the BERT function must also
be PN9.
2. Press
Total Bits
>
5110
>
Bits
.
5110 bits (ten times the PN9 data length) at 64 kbps (current data rate for the DCH) takes 0.080 seconds
to test
.
The value used in this step is merely an example of the number of bits being tested, you can set
the total bits to meet your test needs.
Selecting the BERT Trigger
1. Press
Return
> Configure Trigger.
If the
BERT Trigger
softkey does not show
Trigger Key
as the selected trigger, press
BERT Trigger
>
Trigger Key
.
2. Press
Return
>
BERT Off On
to On.