2. Press the Meas Mode submenu key to open the Select Meas Mode dialog box and choose from: Single, Continuous, Average, Moving Average, or Max Hold. Refer to Meas Mode Settings.
a. The Average Count submenu key is displayed only if you select Average or Moving Average.
b. Press the Average Count submenu key to open the Average Count Editor dialog box. Select a count number within the displayed range and then press the Enter key.
3. Press the Auto Detect Parameter submenu key to toggle the setting to On.
4. Press the Trigger Sweep submenu key to initiate multiple sweeps searching for specific measurement parameters. Sweep types are set with the Meas Mode submenu key.
In Modulation Analysis measurement mode, the Auto Detect Parameter feature is seeking Mode, GI, Modulation, and Hierarchy parameters in multiple sweeps. If none of these parameters are detected, then the search ends, and the Auto Detect Parameter feature is automatically turned off.
In RF Measurements measurement mode, the Auto Detect Parameter feature is seeking Power Level, and it turns off automatically if detection fails.
5. If Auto Detect Parameter is Off, then press the Detect Parameter Once submenu key to detect specific measurement parameters.
The Detect Parameter Once submenu key causes the same general type of inquiry as the Auto Detect Parameter function, but only one try at a time.
Note
The Auto Detect Parameter function and the Detect Parameter Once function may vary depending upon both the Meas Mode setting and the Measurements setting.
6. Press the Advance Settings submenu key to continue measurement setups.
7. Press the Mode, GI submenu key to select the desired lengths of the guard interval.
Guard Interval Lengths in Microseconds
Length
2K
4K
8K
1/4
56 µs
112 µs
224 µs
1/8
28 µs
56 µs
112 µs
1/16
14 µs
28 µs
56 µs
1/32
7 µs
14 µs
28 µs
8. Press the FFT Start submenu key to open the Select FFT Start list box and select the desired start position with a guard interval (0/8 indicates no guard interval).
9. Press the Modulation submenu key to open the Select Modulation list box and choose the desired modulation type: QPSK, 16QAM, or 64QAM.
10. Press the Hierarchy, Alpha submenu key to open the Select Hierarchy, Alpha list box and choose: None, 1, 2, or 4.
11. Press the TPS warning message (Details) submenu key to display any available warning messages.
12. Press the FFT Start Detection submenu key to toggle detection On or Off. The current state is underlined on the submenu key.
Set detection to On in order to continuously search for the FFT Start position from the input signal. This function is not valid when the FFT Start setup value is Fixed. Measurement begins after FFT Start is detected.
13. Press the Spectrum Reverse submenu key to toggle between On and Off. Use Spectrum Reverse to measure a signal with the subcarrier location inverted on the frequency axis, such as the IF signal of the transmitter.
