Tektronix NetTek YBT250, Руководство пользователя

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Appendix A: Specifications
YBT250 Field Transmitter & Interference Tester User Manual
A- 13
Table A- 2: Measurement characteristics (Cont.)
Measurement Description
Adjacent Channel Leakage
power Ratio (ACLR)
(W-CDMA) Measures the ratios of the mean RRC filtered power in
the 5 MHz BW assigned channel to the mean RRC
filtered power in each of the nearest 5 MHz BW 1st and
2nd adjacent upper and lower channels. Adjacent
channel centers are offset in multiples of 5 MHz from the
assigned channel center. User can input channel center
frequency instead of channel number.
Units and Resolution dB: 0.01 dB
Accuracy
±
1.5 dB, 20
≤
ACLR < 48 dB, typical
±
2.5 dB, 48
≤
ACLR < 53 dB, typical
--30 dBm to +20 dBm (power in assigned channel)
Reference Information:
WCDMA Test Model 1 signal (3G PP TS25.141). Filter
response is Root-Raised Cosine (RRC), alpha=0.22,
3.84 MHz noise BW (3GPP TS25.104).
GSM/EDGE Error Vector
Magnitude (EVM) Error Vector Magnitude is the normalized RMS value of
all of the vectors that extend from the intended
constellation points to the actual symbol points in a
record of symbols. The EVM measurement is made over
one GSM or EDGE burst.
Units Percent
Resolution 0.01%
Accuracy
(8-PSK only)
±
1.5%, 4%
≤
EVM < 10%
Residual error: 4.0%
GSM/EDGE Phase Error Phase Error is the RMS value of the differences between
the phase angles of the received signal and those of an
ideal reconstructed signal. The Phase Error measure-
ment is made over one GSM or EDGE burst.
Units Degrees
Resolution
0.01
_
Accuracy
(GMSK only)
±
1.0
_
, 2
_ ≤
Phase Error < 12
_
Residual error: 2.0
_