Performing a Basic CDMA Over Air Measurement


Step
 		Notes
1
 		Mode
2
 		[Over Air]
3
 		[CDMA Over Air]
4
 		[Chan Std]
5
 		Select the channel standard you want using the up and down arrow buttons.
6
 		[Select]
7
 		On [Units] select Chan or Freq.
Each time you press this softkey, the selected option changes.
8
 		[Channel] or [Frequency]
  • If you selected Chan in the previous step, select [Channel].
  • If you selected Freq, select [Frequency].
9
 		Enter the channel or frequency using the numeric keypad.
10
 		[Fwd]
 		Selects the forward CDMA channel.
11
 		Verify that on [Fr/Time Ref] GPS is selected. If not, press [Fr/Time Ref], then press [GPS].

12
 		On [PN Offset] select Auto or Manual.
The test set defaults to Auto mode.
  • In Auto mode the test set finds the PN offset of the strongest pilot signal and displays the value in the metrics display. The delay is derived from the found PN offset.
  • In Manual mode you must enter the PN offset using the numeric keypad. The delay is derived from the entered PN offset.
13
 		[Level/Location]
14
 		[RF IN Loss]
15
 		Set the RF IN Loss to 0 dB using the numeric keypad.
16
 		[dB]
17
 		Connect to the antenna.


NOTE: The test set does not record data for post-processing. It provides a snapshot of CDMA base station transmit parameters at that location.
NOTE: During a CDMA over air measurement, a yellow triangle symbol may temporarily appear beside "GPS" in the lower right. The yellow triangle indicates that the test set is re-synching with the GPS even second pulse. Once the test set is synchronized, a green dot appears in place of the triangle. If the GPS is unavailable, a red X appears. If this happens, you must choose another reference.