Spectrum Analyzer Mode
R&S
®
Spectrum Rider FPH
133
User Manual 1321.1011.02 ─ 06.00
Setting the channel spacing
In the R&S Spectrum Rider, the channel spacing is defined as the distance between
the center frequency of the transmission channel and the center frequency to the next
transmission channel or the distance between the center frequency of the transmission
channel and the center frequency of the adjacent channel.
Specific channel spacing definitions
Note that some radiocommunication standards, e.g. CDMA2000 DS / MC1 / MC3 and
IS95 B / C, IS97 B / C, IS98 B / C, define the channel spacing differently, namely the
distance from the center of the transmission channel to the closest border of the adja-
cent channel. The R&S Spectrum Rider does not consider these specifics. It always
regards the channel spacing as the distance between the center of a channel and the
center of its neighboring channel.
1. Press the [MEAS] key.
2. Select the "Channel Tx Spacing"" softkey to define the transmission channel spac-
ing or "Channel Adj Spacing"" softkey to define the adjacent / alternative channel
spacing.
The R&S Spectrum Rider opens a dialog box to define the spacing for all transmis-
sion channels or adjacent / alternate channels.
3. Select the desired channel input field to change the spacing bandwidth.
4. Enter the channel spacing you need.
5. Select "Done" to apply the changes.
The R&S Spectrum Rider now takes the new values into account for future mea-
surements.
When performing measurements on multi-carrier signals, you can define the spacing of
the transmission (Tx) channels to one another. By default, theR&S Spectrum Rider
assumes equal spacing between all Tx channels in the system. Therefore, the spacing
you enter for the first two Tx channels is automatically applied to all other Tx channels.
If you do measurements on systems with a different channel spacing for each Tx chan-
nel, you can also set the channel spacing for each Tx channel separately by entering
the respective number in the fields.
Performing Spectrum Measurements
