Technical data

194 Chapter 13
GSM/EDGE Programming Commands
EDGE Error Vector Magnitude (EVM)
GSM/EDGE Programming Commands
NOTE The following QPSK EVM results, which would be returned if the measurement were run
in the GSM/EDGE measurement mode, are not returned when the measurement is run in
Sequence Analyzer mode:
• Unprocessed I/Q Trace Data
• EVM Vector Trace
• Magnitude Error Vector Trace
• Phase Error Vector Trace
• I/Q Corrected Trace
• Demodulated Data
• I/Q Derotated Measured Data
• Max Hold EVM Vector Trace & Min Hold EVM Vector Trace
• Max Hold Magnitude Error Trace & Min Hold Magnitude Error Trace
• Max Hold Phase Error Trace & Min Hold Phase Error Trace
17 Maximum Frequency error – a floating point number (in Hz) of the highest
frequency error in the measured signal.
18 I/Q origin offset – a floating point number (in dB) of the I and Q error
(magnitude squared) offset from the origin.
19 Amplitude Droop Error – a floating point number (in dB) of the amplitude
droop measured across the 142 symbol burst.
20 Trigger to T0 - a floating-point number (in seconds) of the time interval between
the trigger point to T0. T0 means the transition time from symbol 13 to symbol
14 of the midamble training Sequence for each time slot.
21 Timing Offset of AM/PM path - a floating number (in seconds) of the time
interval between Amplitude Modulation path and Phase Modulation path.
22 Detected TSC is the most recently detected TSC. The returned value is 0~7
(Burst Type : Normal) if TSC detected. If TSC not detected, the returned value
is –999.0. If Amptd or NONE (Power vs Time only) specified in Sync Type, the
returned value is –999.0. In multi slot condition, the returned value is the
detected TSC of the specified slot (Time Slot ON) or the first evaluated slot
(Time Slot OFF).
23 Detected Mod Scheme (0:GMSK, 1:NB 8PSK, 2:NB 16QAM, 3:NB 32QAM,
11:HB QPAK, 12:HB 16QAM, 13:HB 32QAM) Note that value except for
GMSK and 8PSK return only when U9071A–3FP (EDGE Evo license) is
installed.