User`s guide

Agilent PXT Wireless Communications Test Set
User’s Guide
6
Amp
(Amplitude) This front-panel key displays the following menu of keys.
Amplitude
RF1 Amplitude
RF2 Amplitude
RF1 Amplitude (RSTP)
RF2 Amplitude (RSTP)
AWGN
Key Path: Front-panel key
Amplitude
Sets the RF1/RF2 power level(s) in dBm.
This amplitude level represents the integrated power level, assuming all resource elements in the
bandwidth are occupied. It is sometimes called Channel BW Power (see 36.521-1 Appendix C.0) and, when
doing sensitivity testing, is equivalent to the concept of P
REFSENS
(see chapter 7 of 36.521-1).
In order to determine the true Reference Signal Receive Power (RSRP), it is necessary to take into
consideration the actual number of occupied resource elements in the bandwidth.
The PXT calculates the RSTP for you. See the RF1 Amplitude (RSTP) and RF2
Amplitude (RSTP) menu keys.
Because reference signals are always transmitted and RSRP = Reference Signal Transmit Power (RSTP)
when the path loss is 0, the equation below is always true:
RSTP power level = PXT Amplitude – 10 log
10
(number of resource elements in the cell
bandwidth)
For example: If the BW = 10 MHz:
RSTP power level = PXT Amplitude - 10 log
10
(600)
= PXT Amplitude – 27.8
Bandwidth
Number of Resource Elements in Bandwidth
5
300
10
600
20
1200
RSRP is defined in 3GPP TS 36.133, section 9.1.4.
For more information on RSRP, see the Meas > Information key description on page 77
.
For more information on how power level settings can affect the ability for the UE to connect, see UE is
not connecting.