You can manually tune the test set's receiver frequency and attenuation settings for the frequency and power level that you want to test. Or, you can have the test set automatically tune its receiver's frequency and attenuation settings based on other settings such as
UE Target Power
Automatic receiver control is the default for all operating modes except CW Operating Mode (only manual receiver control is available in CW operating mode). With automatic receiver control, the test set automatically tunes to the correct frequencies for making measurements and maintaining a call based on the Uplink Channel setting. Also, the test set adjusts attenuation settings according to the power level that should be present at the RF IN/OUT port given the current settings. This power level is referred to as the Expected Power .
In some instances, you may want to control the test set's receiver settings manually rather than allowing the test set to automatically control them. This ability is referred to as manual receiver control. Manual receiver settings can be used to override some or all of the automatic receiver settings. You can manually set the Expected Power , the measurement downconverter's tune frequency ( Measurement Frequency ), and the demodulation downconverter's tune frequency ( Uplink Frequency ).
is set to
from the UE is automatically determined by the test set. When
is set to
, the expected power is determined by the
GPIB command: RFANalyzer:CONTrol:POWer:AUTO
is set to
from the UE is determined by the
setting. Note, when you switch between operating modes,
is returned to its default value of
GPIB command: RFANalyzer:MANual:POWer[:SELected]
Expected CW Power
setting determines the
while in CW operating mode.
GPIB command: RFANalyzer:CW:EXPected:POWer
Expected CW Powerand
Manual Powerlevels beyond the actual capability of the test set's hardware. This is because these settings are intended to reflect the potential range of RF power at the UE. This range of RF power is meant to accommodate the use of a gain or loss network between the mobile station and the test set (see Amplitude Offset ). The upper and lower limits of these settings provide boundaries for the combination of amplitude offset and expected power from the UE.
setting is used to manually tune the test set's measurement downconverter input signal path (see
RFANalyzer:MANual:MEASurement[:MFRequency] - Specifies a measurement frequency and sets control mode to manual.
RFANalyzer:MANual:MEASurement:FREQuency - Specifies a measurement frequency.
setting is used to manually tune the test set's demodulation downconverter input signal path (see
). The demodulation downconverter signal path is used to establish and maintain the call (RF link) between the UE and test set.
RFANalyzer:MANual:UPLink[:MFRequency] - Specifies an uplink frequency and sets control mode to manual.
RFANalyzer:MANual:UPLink:FREQuency - To specify an uplink frequency.
To make accurate measurements, the test set needs to know how much power to expect at its RF IN/OUT port; this is referred to as the expected power. If a measurement uses autoranging, the expected power level is calibrated by the test set before making the measurement and does not need to be set by the user. For measurements that do not use autoranging, the test set determines the expected power level in one of several ways:
Active Celloperating mode:
Manual, expected power is determined by the Manual Power setting.
FDD Testoperating mode:
CWoperating mode, expected power is always determined by the Expected CW Power setting.
After selecting the operating mode and setting one or more receiver controls to manual, the receiver control settings remain as you set them until you change operating mode. Changing operating mode causes some or all receiver parameters to return to automatic control.
Manual Operation: How Do I Change Receiver Control Parameters?