Performing a Basic CDMA Transmitter Measurement

Once you have taken the base station out of service and made the proper connections, you can perform CDMA transmitter measurements.

Step
 		Notes
1
 		Mode
2
 		[Tx Analyzer]
3
 		[CDMA Analyzer]
4
 		[Chan Std]
5
 		Highlight 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
 		Enter the channel or frequency using the numeric keypad.
  • If you selected Chan in the previous step, select [Channel].
  • If you selected Freq, select [Frequency].
9
 		[Fwd]
 		Selects the forward CDMA channel.
10
 		[Fr/Time Ref]
11
 		[GPS] or [External Even Sec]
 		GPS is the preferred time reference. If the sky (and hence the satellites) is not visible from the position of your analyzer, use External Even Sec as the time reference. When using the Even Second reference, the base station timing is relative to itself.
12
 		On [PN Offset] select Auto or Manual.
The test set defaults to Auto mode. The other choice is Manual.
  • In Auto mode the test set finds the PN Offset and displays the value in the metrics display at the bottom of the screen. The Time Offset is derived from the PN Offset that has been found.
  • In Manual mode you must enter the PN Offset, which appears in the metrics display. The Time Offset is derived from the entered PN Offset.
13
 		Connect to the base station.


NOTE: During a CDMA Analyzer 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.