DVB‑T/H BER Measurements (Option 57 only)
 |
DVB ASI Out Connector
The digital signal output, 50 Ω Type‑N female connector (shown in Figure: “Instrument Connectors for Digital Television Signal Analysis”) is present only when both DVB‑T/H (Option 64 or Option MS8911B‑0050) and DVB‑T/H BER (Option 57) are installed on your instrument.
The DVB‑ASI function produces MPEG‑TS data output during a BER measurement. This output can be connected to MPEG‑TS analysis equipment to monitor video errors or can be connected via an appropriate ASI to USB demultiplexing and decoding accessories for channel identification and monitoring purposes.
Figure: “Bit Error Rate (BER) Measurements” is a sample BER measurement to show the types and locations of data that are displayed. This image may differ from any image on your instgrument. The following parameters are measured in the BER measurement mode.
|
1.
|
Press the Measurements main menu key to display the Meas Selection menu.
|
|
2.
|
Press the BER submenu key to view the BER measurement screen.
|
|
3.
|
Press the Setup main menu key to open the Meas Setup (1/2) menu and configure the following parameters: Meas Mode, Bit Count Setting, Service, Stream, BER Meas Point, and Result Disp.
|
|
a.
|
Press the Meas Mode submenu key to open the Select Meas Mode list box and choose one of the following modes: Single, Continuous, Average, Moving Average, or Max Hold. If you select Average or Moving Average, then also set the Average Count. Refer to “Meas Mode Settings”.
|
|
1)
|
|
2)
|
Select a count number within the displayed range by using an arrow key or the rotary knob to highlight the desired measurement mode. Then press Enter.
|
|
b.
|
|
1)
|
Press the Mantissa submenu key to set the desired Mantissa.
|
|
2)
|
Press the Exponent submenu key to set the desired Exponent value.
|
|
3)
|
Press Enter to set the new Mantissa and Exponent. The menu returns to Meas Setup (1/2).
|
For an example of the Bit Count Setting for mantissa and exponent, refer to Table: “BER Setup Parameters Table”.
|
c.
|
|
1)
|
If Out of Service is selected, then the BER Meas Point submenu key is displayed in the Meas Setup (1/2) menu list, and the TS Packet submenu key is displayed in the Meas Setup (2/2) menu list.
|
|
2)
|
Press the BER Meas Point submenu key to open the Select BER Meas Point list box. Use the arrow keys or the rotary knob to highlight the desired parameter (Before Viterbi, Before RS, or After RS) and then press Enter.
|
|
3)
|
Press the More submenu key to display the Meas Setup (2/2) menu, and then press the TS Packet submenu key to open the Select TS Packet list box. Highlight the desired TS Packet value and press Enter.
|
|
4)
|
Press the Spectrum Reverse submenu key to toggle this view On or Off. The current setting is underlined on the submenu key.
|
|
5)
|
|
6)
|
Press the Back submenu key to return to the Meas Setup (1/2) menu.
|
|
d.
|
Press the Stream submenu key to open the Select Stream list box. Highlight HP (High Priority) or LP (Low Priority) and then press Enter.
|
|
e.
|
Press the Result Disp submenu key to toggle between Current and Last. The current setting is underlined on the submenu key. Select Current to view the current measurement, or select Last to view the last measurement taken, and then press Enter.
|
|
f.
|
Press the More submenu key.
|
|
g.
|
Press the Spectrum Reverse submenu key to toggle this view On or Off. The current setting is underlined on the submenu key.
|
|
h.
|
|
i.
|
Press the Back submenu key to return to the Meas Setup (1/2) menu.
|
|
3E + 07
|
|
|
1 + [187] + 16
|
|
