The range of voltage measurement at the Analyzer input is from 10 to 100 V. The absolute error of the
measurement is lower than ±1.5 V. The measured value of the voltage is indicated in position 7 (Figure
4.3.5). If the voltage is direct you will see
V=
on the screen, if it is alternating
V~
will appear.
To measure channel parameters, select the required channel by
◄
and
►
arrows.
If no channel plan is selected, using
◄
and
►
arrows you can switch to any channel in accordance with
the channel template (Section 4.7). Once a signal is detected, the Analyzer will automatically determine the
channel type. The measurements will be performed in accordance with these parameters.
If one of the channel plans has been selected (Section 4.5), the selection will be performed between the
channels of the plan.
You can access other measurement modes using functional keys.
F1
key will open SCAN mode (Section
4.3.3).
F2
key will activate the mode of signal level measurement in a frequency point.
F3
key will open
MER/BER measurement mode (Section 4.3.6), if the selected channel is digital.
The view of the screen in the mode of signal level measurement in a frequency point is shown in Figure
4.3.7.
Figure 4.3.7
In this mode V/A ratio and C/N ratio are not displayed, as well as
D
message.
In the mode of signal level measurement in a frequency point the level is measured at the selected
frequency. This mode is indicated by
Hz
message in the command line. The tuning to the frequency is
performed with 125 kHz step by
◄
and
►
arrows.
Pressing
F2
key you can return to channel parameters measurement mode.
4.3.3 SCAN measurement mode
The
icon in the Main menu refers to this mode. This mode displays the signal levels as a bar-
graph. See Figure 4.3.8:
Figure 4.3.8
On the screen you will see the following data:
1 – number of channel indicated by marker
2 – command line with commands activated by
F1
,
F2
and
F3
keys
3 – channel name (when working with selected channel plan)
4 – measured level of channel indicated by marker, in dBmV, dBuV or dBm
5 – marker
6 – channel status:
A
– analog,
D
- digital.
You can navigate the marker by means of
◄
and
►
keys.
If no channel plan has been selected, all the channels of the channel allocation standard will be
displayed on the screen. Channel modulation type is determined automatically when you enter the mode and
12
Summary of Contents for IT-14
Page 1: ...IT 14 DVB T SIGNAL ANALYZER OPERATING MANUAL...
Page 2: ...2 22 04 2011...
