Bird Technologies SH-36S-RM-Manual - Manual (Page 73)

Measurements
57
Adjacent Channel Power Measurement
Adjacent Channel Power measures the relative power of frequency
bands adjacent to a central channel. This is often used to identify
power leakage from the center channel into the adjacent channels.
The total power in the central (main) channel is displayed in dBm
(Ch Power), and the power in the adjacent channels is displayed as dB
below and above the main channel power (Dn ACPR and Up ACPR).
Note:
For best accuracy, set the central frequency so the sig-
nal is centered before taking measurements. In addition, set the
span so the central, upper, and lower channels are all shown on
the screen.
Note:
If a channelized band is selected from the Frequency
list, these parameters are automatically set.
1. Set the width of the central channel.
Note:
The central channel can be set to a different fre-
quency width than the adjacent channels, but both adjacent
channels have the same width.
2. Set both adjacent channels.
3. Set the Center-to-Center channel spacing.
Note:
Channel spacing is the distance from the central chan-
nel’s center frequency to the adjacent channel’s center frequency. If
there is no guardband between channels, the channel spacing
should be half (channel width + adjacent channel width).
4. Enter the desired bandwidth in each variable.
5. Select the desired unit of measurement.
Note:
Pressing Enter will default the Unit to MHz.
Note:
All 6 markers will be used to show the edges of the
central, upper, and lower channels.