DVB-T/T2 terrestrial receiver
MERlin
Using the Web Page
2013 dB Broadcast Ltd
20
Version 1.2
Modulation Properties
Parameter
Description
Values
Constellation
Displays the constellation
QPSK, 16QAM, 64QAM
COFDM Mode
FFT size (k=1,024)
2k, 8k
Guard Interval
Inter symbol gap
1/4, 1/8, 1/16, 1/32
Hierarchy
No hierarchical mode at present
Fixed as None
HP FEC
Displays the High Priority Forward Error
Correction protection scheme (code rate)
1/2, 2/3, 3/4, 5/6, 7/8
LP FEC
Displays the Low Priority Forward Error
Correction protection scheme (code rate)
1/2, 2/3, 3/4, 5/6, 7/8
Measurements
Parameter
Description
Values/Units
RF Input Level (dBm)
Reports actual RF input level
dBm
MER (dB)
Modulation Error Ratio
dB
Lock Status
Indicates if the receiver is locked to the input RF
Locked, Unlocked
Frequency
The receiver frequency required to achieve lock
kHz
Frequency Offset (8 MHz)
Lower, None, Upper
-167kHz, 0kHz, +167kHz
Frequency Offset (7 MHz)
Lower, None, Upper
-125kHz, 0kHz, +125kHz
Frequency Error
The difference between the frequency MERlin
was set to and that required to achieve lock
kHz
BER Pre Viterbi
Pre Viterbi decoder error rate
BER Post Viterbi
Post Viterbi decoder error rate
UCE
Uncorrected errors - Reed - Solomon errors
Integer
UCE total
Count of UCE’s since last Reset UCE
Integer
Tuner Temperature
Temperature of the RF front end
Degrees Centigrade
