Expanded Spectrum Measurement Mode; Mer/Ber Measurement Mode - Labgear DAT103 Operating Manual

4.3.5 EXPANDED SPECTRUM measurement mode

This measurement is selected from the SCAN mode by pressing the F3 key. This mode
displays spectrum of the input signal in scaleable frequency range. See Figure 4.3.10:
On the screen you will see the following data:
1 – Frequency point indicated by the marker
2 – Command line with commands activated by F1, F2 and F3 keys
3 – Measured signal level of the frequency point indicated by the marker, in dBmV,
dB V or dBm
4 – Status of AMP power supply (Section 4.3.8)
5 – Marker
Adjust the marker position by ◄ and ► arrows. Select frequency range scale with F1
and F2 keys from the following list:
a) . Spectrum diagram shows a span resolution of 14MHz frequency range.
b) . Spectrum diagram shows a span resolution of 28MHz frequency range.
c) . Spectrum diagram shows a span resolution of 55MHz frequency range.
d) .Spectrum diagram shows a span resolution of 110MHz frequency range.
You can return to SCAN measurement mode by pressing F3 key.
AMP power supply, is controlled by pressing the

4.3.6 MER/BER measurement mode

The icon in the Main menu refers to MER/BER measurement mode. Here we
see the DVB-T signal quality table of parameters. The screen view shows in Figure 4.3.11:
On the screen you will see the following data:
1 – Channel number
2 – Selected frequency and frequency offset in MHz
3 – Signal modulation parameters (subcarrier modulation type and subcarriers number)
4 – MER and Margin values in dB
14
Figure 4.3.10
key briefly (section 4.3.8).
Figure 4.3.11