Setting and Using the Measurement Functions
R&S FSH
1145.5973.12 4.34
E-14
Setting and Using the Measurement Functions
If you want to perform complex measurements, the R&S FSH provides measurement functions which
perform certain measurement tasks with a minimum of keystrokes or, in conjunction with various
accessories, will allow you to perform advanced measurements.
Measuring the channel power of continuously modulated
signals
Due to the channel power measurement function, the power of modulated signals can be measured
selectively. Unlike a power meter which measures power over its whole frequency range, the channel
power mode allows the power in a specific transmission channel to be measured. Other signals in the
frequency spectrum have no effect on the result.
When the channel power mode is selected, the R&S FSH determines the spectrum within the channel
using a resolution bandwidth that is small in comparison with the channel bandwidth. The measured
values on the trace are then integrated to give the total power. The R&S FSH takes into account the
selected display mode (absolute or relative), the selected detector and the resolution bandwidth, which
means that the result is comparable to the result that would have been obtained from a thermal power
meter. The small resolution bandwidth acts like a narrow channel filter and so prevents out-of-channel
emissions from affecting the result.
The R&S FSH has presettings for the 3GPP WCDMA, cdmaOne and CDMA2000 1x systems and so
the user does not have to enter any settings himself. However, user-defined channel settings can also
be entered to set up the R&S FSH for other communications systems.
Operating sequence:
Press the MEAS key.
Press the MEASURE softkey.
The submenu for selecting the measurement functions
opens.
Using the rotary knob or the cursor keys, select the
CHANNEL POWER menu item.
(CHANNEL POWER highlighted in red)
Confirm your selection with the ENTER key or the
MEASURE softkey.
深圳市盛腾仪器仪表有限公司
Tel:0755-83589391
Fax:0755-83539691
Website: www.Sengt.com
