1xEV-DO Signaling
R&S
®
CMW-KG8xx/-KM8xx/-KS8xx
72
User Manual 1173.9511.02 ─ 11
Output Power
Absolute output power at the selected RF output connector: the sum of the "1xEV-DO
Power" and the "AWGN Level".
Remote command:
Expected Power Mode
Configures the input path of the RF analyzer according to the expected output power of
the AT under test. The R&S
CMW assumes a 9 dB peak-to-average ratio (crest factor)
of the received 1xEV-DO signal and allows for an additional reserve. For an expected
RMS input power of x dBm, powers exceeding (x + 9) dBm can be measured.
●
Manual
: Assume that the AT transmits at the fixed "Manual Expected Power" value
and configure the R&S
CMW input path accordingly.
●
Open Loop Rule
: Assume that the AT transmits according to the open loop power
rule. The sum of the mean input power at the AT receiver plus the mean output
power at the AT transmitter is maintained at a constant power offset:
<input power> + <output power> = <power offset>
The power offset depends on the band class; see standard 3GPP2 C.S0057-D.
●
Max Power
: Assume that AT transmits at its maximum output power (RMS value
≤
+23 dBm; see table below).
●
Min Power
: Assume that AT transmits at its minimum output power (RMS value
≤–
47 dBm; see table below).
●
Autoranging
: Determine the actual peak power of the input signal and set the
input path accordingly.
The "Expected Power Mode" does not affect the actual output power of the AT which is
controlled by the "Reverse Power Control" settings. To avoid overloading/underloading
the RF analyzer (and thus losing the connection), the settings must be compatible.
Some simple examples for compatible combinations are listed below.
Table 2-7: Compatible "Expected Power Mode" and "Reverse Power Control" settings
Expected Power Mode
Power Control Bits
Expected input power (RMS)
Manual
Auto
Manual Expected Power
Max Power
All Up
+23 dBm
Min Power
All down
–
47 dBm for RF1 COM
Remote command:
Manual Expected Power
Expected absolute input power at the R&S
CMW input connector for "Expected Power
Mode: Manual". Input powers above the "Manual Expected Power" overdrive the input
path and cause invalid results.
Remote command:
GUI Reference
深圳德标仪器
135-1095-0799
