Table of Contents
Advertisement
FIELD METERS MCT 080 / 081 / 082 / 085 USER MANUAL
10.5
Thresholds
Predefined thresholds are used to assess if the measurement is pertinent.
Decision thresholds are used to display the measures « Power Level » and « Measurement Map »:
10.6
Digital measurements
In digital standards, in addition to the RF level and to the C/N hereabove, the appliance also displays :
different BER (Bit Error Rate): ratio false bits / transmitted bits
-
the Packet Error Rate (PER): ratio false packets / transmitted packets
-
-
the MER (Modulation Error Ratio): digital signal-to-noise ratio
LKM (Link Margin): difference between measured MER and MER before unlocked
-
(this is the margin available before unlocking.)
The bargraphs are displayed with colors depending on the measured error rates:
-
-
-
An automatic frequency check (AFC) is automatically activated in error rate measurement
mode.
Standard
Analogical terrestrial TV
DVB-C/C2, J83B
DVB-T/T2
DAB-DAB+
FM, carrier
Analogical satellite TV
DVB-S, DSS
DVB-S2
min threshold
GREEN: good error rates
-4
ORANGE: BERo > 10
(QEF : Quasi Error Free) without lost packet
RED: lost packets (PER).
Min
Max
57
74
57
74
35
70
35
70
50
66
47
77
47
77
47
77
max threshold
p.
55
Advertisement
Table of Contents
