Chapter 16
Performing RFoCPRI Testing
JD700B Series User’s Guide
587
Selecting port
JD700B series supports two antenna ports for signal transmission, and each port can generate up to four
different waveforms selectively and simultaneously. User can select the port to use for the measurement in
any measurement modes of RFoCPRI mode.
Procedure
1
In any measurement mode, press the
MEASURE SETUP
hot key.
2
Toggle the
Select Port
soft key between
Port 1
and
Port 2
to select the desired port.
Setting measure setup
Procedure
1
Press the
MEASURE SETUP
hot key.
2
To set the CPRI line bit rate of the fronthaul under test, complete the following steps:
Press the
Link Rate
soft key.
Select the CPRI link rate option from the choices:
614.4 Mbps
,
1228.8 Mbps
,
2457.6 Mbps
,
3072.0 Mbps
,
4915.2 Mbps
,
6144.0 Mbps
, or
9830.4 Mbps
.
NOTE
It is important that you set the link rate correctly to avoid any misleading LOS and LOF
alarms displayed on the screen.
3
Toggle the
Tx Clock
soft key to
Recovered
(default).
4
Toggle the
Port Type
soft key and select
Slave
(default).
5
To turn on the through mode, go to
More (1/2) > Thru
, and then toggle the
Thru
soft key to
On
.
To turn off, toggle to
Off
.
6
To configure Rx parameters, see “Configuring Rx Parameters” on page 587.
7
Optional
. To use the RF signal generator function, see “Using RF source in RFoCPRI testing” on
8
Optional
. To use the CPRI signal generator function, see “Using CPRI source” on page 642.
Configuring Rx Parameters
Procedure
1
Press the
MEASURE SETUP
hot key.
2
Press the
Rx Parameters
soft key.
3
To set the antenna per carrier group, complete the following steps:
Press the
AxC Group
soft key.
Enter a value by using the numeric keys. You can also use the rotary knob.
Press the
Enter
soft key.
NOTE
Maximum number of the AxC Group is determined by the factors of link rate, sample
width, oversampling, and signal bandwidth.
4
To set the I and Q sample widths, complete the following steps:
Press the
IQ Sample Width
soft key
Enter a value between 4 and 20 by using the rotary knob. You can also use the numeric
keys, and then press the
Enter
soft key.
NOTE
According to the CPRI specification, the IQ sample width shall be between 4 and 20 bits
for I and Q in the uplink and between 8 and 20 bits in the downlink.