User`s guide

Agilent PXT Wireless Communications Test Set
User’s Guide
98
Mode
BSE
Initial S/W Revision
6.4
Key Path Mode > BSE > Mode Setup > More > PHY Settings > DL Resource
Allocation
I_MCS sf-control
By default, the MCS index used on all downlink subframes is the same and is controlled by the I_MCS
menu key on page 99
.
However, in certain circumstances, it may be preferable to use a different MCS index on subframe zero
than that used on other subframes. This setting enables you to enter a different value for subframe zero.
One of the circumstances where you may wish to use a different MCS index on subframe zero is where
receiver testing, as specified in 3GPP 36.521-1, is being performed. In that case, the MCS Index used on
subframe zero may need to be different than that used on the other downlink subframes in order to allow
configuration of the appropriate Reference Measurement Channel.
It is particularly useful to use a different MCS index on subframe zero when using the smallest bandwidths
for example: 1.4 and 3 MHz. In these cases, so much of the available DL physical resource is used by
channels such as the P-BCH, P-SS and S-SS, that it is not possible to fit as large a transport block into
subframe zero as it is for the other subframes.
For the 1.4 MHz BS, this is especially true. Therefore, the default for the 1.4 MHz BW is On
, whereas the
other bandwidths have a default of Off
.
Mode
BSE, FDD
Range
On | Off
Preset
Off
Initial S/W Revision
6.0 (Moved to DL Resource Allocation menu in 6.4)
Key Path Mode > BSE > Mode Setup > More > PHY Settings > DL Resource
Allocation > I_MCS sf-control
I_MCS(subframe#0)
If I_MCS sf-control is set to On, this specifies the MCS Index that is used on the downlink in subframe
zero.
Mode
BSE, FDD
Range
0 – 28
Preset
5
Dependencies and/or Couplings I_M CS sf-control must be set to On to enable this function.
For 1.4 MHz BW, a different MCS index is selected automatically.
Initial S/W Revision
6.0 (Moved to DL Resource Allocation menu in 6.4)
Key Path Mode > BSE > Mode Setup > More > PHY Settings > DL Resource
Allocation > I_MCS sf-control