General Description
R&S
®
CMW-KM750/-KM751
24
User Manual 1173.9670.02 ─ 05
Frequency Offset
from carrier Δf
Minimum
requirement
Measurement
bandwidth
0.8 MHz to 1.8 MHz
–35 dBc – 14*(Δf/MHz – 0.8) dBc
(-->
Point E, D
)
30 kHz
2)
1.8 MHz to 2.4 MHz
–49 dBc – 17*(Δf/MHz – 1.8) dBc
(-->
Point D, C
)
30 kHz
2)
2.4 MHz to 4.0 MHz
–44 dBc
(-->
Point B, A
)
1 MHz
3)
Note 1) Δf is the separation between the carrier frequency and the center of the mea-
surement bandwidth. Each linear limit line section is defined by a pair of points (A, B), (C,
D), (D, E), assuming a linear power/frequency dependence.
Note 2) The first and last measurement position with a 30 kHz filter is 0.815 MHz and
2.385 MHz.
Note 3) The first and last measurement position with a 1 MHz filter is 2.9 MHz and 3.5
MHz.
Note 4) The limit specifications above only apply if the power in the measured frequency
range exceeds the absolute limit of –55 dBm referenced to a 1.28 MHz filter (-->
Line
G
). This implies that the absolute lower spectrum emission limits must be:
in frequency domains where they are measured with a 1 MHz filter, and
in frequency domains where they are measured with a 30 kHz filter.
Signals with smaller powers always pass the entire limit check.
The complete spectrum emission mask is shown in the figure below.
Limit Settings and Conformance Requirements
