Tektronix MTS415, Technical Reference

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Specifications
Version 00b
MTS400 Series Performance Verification and Specifications Technical Reference
1−11
Table 1 − 8 lists the electrical characteristics for the COFDM measurements.
Table 1−8: COFDM measurements
Characteristic Description
Overall receiver lock status Overall receiver lock status is indicated by an LED on
the rear panel
Transmission coding parameters The receiver reports the current status of the
following transmission parameters:
− QPSK/16, QAM/64, QAM encoding
− 2K/8K Transmission mode
− Hierarchy status (hierarchy on/off, alpha value)
− Viterbi puncture rate
− Guard Interval Value
− Gross bit rate in the channel
− Spectrum polarity (inverted/non-inverted)
Input level (signal strength) Ranges, High Sensitivity mode:
QPSK (4QAM): −85 dBm to −10 dBm (24 dBuV to
99 dBuV)
16QAM: −80 dBm to −10 dBm (29 dBuV to
99 dBuV)
64QAM: −72 dBm to −13 dBm (37 dBuV to
96 dBuV)
Ranges, High Resolution mode:
QPSK (4QAM): −45 dBm to −10 dBm (64 dBuV to
99 dBuV)
16QAM: −45 dBm to −10 dBm (64 dBuV to
99 dBuV)
64QAM: −45 dBm to −13 dBm (64 dBuV to
96 dBuV)
Resolution: 1 dBm
Accuracy:
"
3 dBm
RF carrier offset Accuracy:
"
50 ppm of the tuned frequency
SNR (Signal to Noise Ratio) Display Range:
6 dB to 40 dB for QPSK (4QAM)
11 dB to 40 dB for 16QAM
16 dB to 40 dB for 64QAM
Resolution: 1 dB
Accuracy:
"
1 dB to 30 dB SNR (measured at
−30 dBm input in high resolution mode)
COFDM Card
Measurements