Setting the Transmitter Reference

Setting the Transmitter Reference
You can set the W-CDMA or W-CDMA (with HSDPA) Over the Air display to show the power in each channel as either relative power (dB) or absolute power (dBm). The test set's default display mode is relative. In relative mode, the top horizontal line (top-most graticule) of the display represents the total power (channel power) in the 3.84 MHz bandwidth of that W-CDMA or W-CDMA (with HSDPA) signal being broadcast by the transmitter. It is always 0 dB in this mode since it is a relative measurement. The power in each channel is shown as a vertical bar, with its height expressed in dB relative to the total channel power.
If you set the reference level mode to absolute, then the top graticule in the display still corresponds to total channel power in the 3.84 MHz bandwidth. However, the reference level and all the power values of the vertical bars showing the power in each channel are now indicated with absolute power in dBm.

NOTE: This setting only affects the CDP display, the Control Channel display, and the Codogram display. The Metrics display and the Pilot View are not affected.

To set the W-CDMA or W-CDMA (with HSDPA) Transmitter Display Reference level:

Step
Notes

1
[Level/Location]

2
On [Reference] select Abs or Rel.
Each time you press this softkey, the selected option changes.


	Step	Notes
1	[Level/Location]
2	On [Reference] select Abs or Rel.	Each time you press this softkey, the selected option changes.