Tektronix MTS415, Technical Reference

Page: 23 / 48

Specifications
Version 00b
MTS400 Series Performance Verification and Specifications Technical Reference
1−13
Table 1 − 9 lists the electrical characteristics for the 8VSB card.
Table 1−9: 8VSB board electrical characteristics
Characteristic Description
Input frequency range 54 MHz to 860 MHz, VHF/UHF channels 2 to 69 (to
include low VHF frequencies)
Input signal level −72 dBm to −6 dBm (−23 dBmV to
)
43 dBmV)
w
−50 dBm to ensure compliance to IEC 61000-4-3
immunity
Modulation format 8VSB in accordance with ATSC A/53B
Receiver bandwidth 6 MHz
Input termination impedance 75 nominal
Connector type F-type
Input return loss 5 dB minimum
Ultimate equivalent MER, with an
equalizer
w
31 dB with an equalizer
Table 1 − 10 lists the electrical characteristics for the 8VSB measurements.
Table 1−10: 8VSB measurements
Characteristic Description
RF Lock RF lock is indicated by LED and Status
Input level (signal strength) Display Range:
−72 dBm to −2 dBm relative to 75
(−23 dBmV to
+47 dBmV)
Resolution: 1dB
Accuracy:
"
3dB
EVM (Error Vector Magnitude) Display Range:
v
3.0% to
w
12.5% rms
Resolution: 0.1%
Accuracy:
"
20% of reading
Equivalent MER (Modulation Error
Ratio) with Equalizer Display Range: 17 dB to 31 dB with Equalizer
Resolution: 0.1 dB
Accuracy:
"
1 dB for MER
u
25 dB;
"
3 db for MER 25 dB to 31 dB
(Measured at −30 dBm input. For best MER
accuracy, maintain the input signal level between
−50 dBm and −15 dBm.)
SNR (Signal to Noise Ratio) Display Range: 15 dB to 35 dB
Resolution: 1 dB
Accuracy:
"
1 dB for SNR < 25 dB;
"
3 db for SNR 25 dB to 35 dB
8VSB Card
Characteristics
8VSB Measurements