3GPP Signal Analyzer for Anritsu RF and Microwave Handheld Instruments : EMF (Option 444) : W‑CDMA EMF Menu
  
W‑CDMA EMF Menu
Key Sequence: Measurements > OTA > EMF
W-CDMA EMF Menu
Measurement On/Off: Starts the EMF Measurement and removes access to all other menu buttons. The measurement turns On only if the Center Frequency is set within the valid range and the Anritsu Isotropic Antenna is connected.
Note that the Measurement Time and other related parameters must be set before starting the measurement. This button is useful for stopping or restarting measurements when settings need to be changed. When the measurement is in progress, access to other menus and key presses are blocked.
Measurement Time: Sets the measurement duration from one minute up to 30 minutes.
Number of Measurements: Sets the number of EMF measurements to complete from 1 up to 10,000.
Auto Logging On/Off: Auto Logging is On by default. This must be selected prior to starting the measurements for the results to be logged. The PCPICH (Primary Common Pilot Channel) and Field Strength actual and average values of the current measurement are stored. The maximum, minimum, and total average values stored are not per measurement, but for all the values captured until that point.
The location of the saved log file is a new folder named with the current time stamp followed by _1, and created in “/Internal Memory/EMF/”. The folder can hold 100 files. Each file holds five measurements. The 101st file and the files created thereafter are stored in a new folder with the same time stamp as the first, followed by _2 (then _3, and so on). Each file has its own time stamp.
Measurement Parameters: Opens the Meas Params Menu (W‑CDMA).
EMF Units: The unit choices are dBm/m2, V/m, W/m2, % of Limit (V/m), and % of Limit (W/m2). V/m is the default unit.
% of Limit (V/m) and % of Limit (W/m2) display the measured numbers as a percentage of the selected limit. The submenu key shows the currently selected EMF unit. If the selected base unit is in V/m or % of Limit ( V/m), the averaging over the selected period is done in Volt units; if any of the other units are selected, the measurements are performed in power (Watt) units. If you change the EMF units at the end of the measurement, the values displayed are converted from the base units used during the measurement.
Limits: A single number can be entered. The Field Strength (Avg) value should stay below this limit (default 6 V/m) for the test to pass.
Back: Returns to the previous menu.
Meas Params Menu (W‑CDMA)
Key Sequence: Measurements > OTA > EMF > Measurement Parameters
W-CDMA Meas Params Menu
 
 
Scrambling Code: Press this key to toggle between Auto or Manual Scrambling Code. Auto Scrambling Code determines the scrambling code automatically.
Manual Code: Press this submenu key to manually enter the scrambling code using the number keys or the rotary knob.
On Off: Switches On/Off the manual codes.
Display Params: Opens the Display Menu. The choice of Auto or Manual scrambling codes and the code lock/reset options function in the same manner as Scrambling Code in W‑CDMA OTA measurement mode.
The parameters to be displayed on the user interface (only the final column) can be selected under Display Params. The available options are:
Total Min (the minimum value for the entire measurement period)
Total Avg (running average for the entire measurement)
Actual over Field Strength (Actual)
Max over Field Strength (Max)
Avg over Field Strength (Avg)
Min over Field Strength (Min)
Total Avg over Field Strength (Total Avg)
This ratio of common pilot signal to the channel power (5 MHz bandwidth) is a coverage measurement. The default selection is Total Avg. The parameters to be viewed can be changed at the start or at the end of the measurement cycle. All the parameters are always computed and stored. Once the measurement is complete, any parameter can be viewed in the desired units and with the desired extrapolation factor.
Extr Factor: The extrapolation factor, when turned On (> 1), displays the extrapolated P‑CPICH numbers. The field strength values are not extrapolated. The extrapolation factor can be set between 1 and 100 (the network operator can provide this number).
Back: Returns to the W‑CDMA EMF Menu.
Measurement Results (W-CDMA)
The measurement starts by setting the antenna’s X-Axis and capturing Over-the-Air data. If a sync signal is found and there is a valid Scrambling Code, the PCPICH and Channel Power in 5 MHz bandwidth are stored. This is repeated for Y and Z axes. If any one of the axes has a valid Scrambling Code, the isotropic result (for example, (PCPICH2X + PCPICH2Y + PCPICH2Z)0.5) for each of the above mentioned parameters is stored. There is no axis dwell time parameter. If a sync signal is not found in a specific time, the measurement switches to the next axis.
The isotropic result computed for each parameter is displayed as the Actual result. The Total Max and Total Min are the final isotropic results computed for that parameter for the entirety of the measurement (measurement time * number of measurements). The Avg/Meas is the running average of the isotropic results, and Total Avg is the final average of all the isotropic numbers for each parameter computed during the measurement period (measurement time * number of measurements).
The Field Strength number computed is for 5 MHz bandwidth.
If the Extrapolation Factor is turned On, PCPICH (Emax) is computed as follows:
where Epcpich is the root sum square (rss) value of the common pilot signal recorded in each axis and k is the extrapolation factor provided by the network operator.
If a valid Scrambling Code is obtained even once during the entire measurement period, an entry is made in the table. “--” indicates an invalid result. A maximum of 6 Scrambling Codes can be detected. The Total row sums the isotropic numbers for the selected display parameter across Scrambling Codes.
Pass/Fail
If the Field Strength Average exceeds the set limit, the Current and Final Test Status are marked as Fail in red. The limit check is performed at the end of a measurement period. If the Field Strength number does not exceed the limit, the Current Test Status is marked as Pass in green. If all measurements pass, the Final Test Status is updated to Pass and highlighted in green from “--” at the end of all the measurements.
W-CDMA EMF Measurement Display