R&S FSQ Signal Analyzer - Rohde & Schwarz

R&S FSQ Instrument Functions
CHANNEL
SPACING
Analyzer Mode
Measurements in the time domain (FAST ACP ON) are performed in the zero span
mode. The channel limits are indicated by vertical lines. For measurements requiring
channel bandwidths deviating from those defined in the selected standard the IBW
method is to be used.
Refer to section “Filter Types” on page 4.26 for a list of available filters.
When measuring according to the IBW method (FAST ACP OFF) the bandwidths of
the different adjacent channels are to be entered numerically. Since all adjacent
channels often have the same bandwidth, the other channels Alt1 and Alt2 are set to
the bandwidth of the adjacent channel on entering the adjacent-channel bandwidth
(ADJ). Thus only one value needs to be entered in case of equal adjacent channel
bandwidths. The same holds true for the ALT2 channels (alternate channels 2) when
the bandwidth of the ALT1 channel (alternate channel 1) is entered.
The channel spacings can be set separately by overwriting the table from top to
bottom.
The entry "TX" is only available for the multi carrier ACP measurement.
Remote command: SENS:POW:ACH:BWID:CHAN 14kHz
SENS:POW:ACH:BWID:ACH 1kHz
SENS:POW:ACH:BWID:ALT1 14kHz
SENS:POW:ACH:BWID:ALT2 14kHz
The CHANNEL SPACING softkey opens a table for defining the channel spacings
for the TX channels as well as for the adjacent channels.
The entry "TX" is only available for the multi carrier ACP measurement.
TX channels
The spacing between every TX channels can be defined separately. Therefore a TX
spacing 1-2 for the spacing between the first and the second carrier, a TX spacing 2-
3 for the spacing between the second and the third carrier and so on can be defined.
In order to allow a convenient setup for the system with equal TX channel spacing,
the value of TX spacing 1-2 will be copied in all the spacing below after entry, the TX
spacing 2-3 will be copied in all the spacing below after entry and so forth.
For different spacings, a setup from top to bottom is necessary.
If the spacings are not equal, the channel distribution according to the center
frequency is as follows:
• Odd number of TX channels:
The middle TX channel is centered to center frequency.
Operating Manual 1313.9681.12 - 01 4.97