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Chapter 5 363
One-Button Measurement Functions
Meas Setup (Adjacent Channel Power—ACP)
One-Button Measurement Functions
Example: ACP:CARR:CPSD 5
5.6.10 Limit Test
Pressing Limit Test turns the testing of the limit line on or off. When Limit Test is set to On,
each offset is compared to its upper and lower offset limit. In those cases where the power
exceeds the limit, a red “F” is placed next to the dBc result to indicate a failure. If there are
any failures, the pass/fail indicator area show “FAIL” in red; if there are none, it shows
“PASS” in green. Any offsets that are in the off state (see
“Offset Freq or Edge Freq” on
page 354
) are not measured and their results will not be displayed on screen.
Key Path:
Meas Setup
State Saved: Saved in instrument state.
Factory Preset: Off
History: Updated with firmware revision A.03.00.
Added with firmware revision A.02.00.
Remote Command:
[:SENSe]:ACPower:LIMit[:STATe] OFF|ON|0|1
[:SENSe]:ACPower:LIMit[:STATe]?
Example: ACP:LIM 1
ACP:LIM?
5.6.11 RRC Filter
Pressing Filter turns the Root Raised Cosine filter on or off. This filter is the type specified
in the NADC and 3GPP W-CDMA standards and is only available when 3GPP W-CDMA or
NADC is selected as the Radio Std from the Mode Setup menu. If 3GPP W-CDMA is selected, the
roll-off value (alpha) for the filter will be initially set to 0.22. T is set to 1/RefBW (default
260 ns). If NADC is selected, the roll-off will be initially set to 0.35. T is set to 1/RefBW
(default 42 µs). If
TETRA has been selected, the roll-off will be initially set to 0.35. T is set to
1/RefBW (default 55.6 µs). The roll-off value can be changed using
Filter Alpha.
The filter is unavailable when the measurement method is set to
RBW.
Key Path:
Meas Setup
State Saved: Saved in instrument state.
Factory Preset: Off
History: Added with firmware revision A.03.00.