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.
Note
You can monitor this port to verify that you are connected to the correct input channel.
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 the actual screen on your instrument. The following procedure describes an example BER measurement.
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 either Single or Continuous. Refer to Meas Mode Settings.
b. Press the Bit Count Setting submenu key to open the Bit Count Setting Editor dialog box.
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).
c. Press the Service submenu key to open the Select Service list box. Choose between In Service testing and Out of Service testing and then press Enter. Continue at the following Step 1 if Out of Service testing is selected. Continue at Step 3d if In Service testing is selected.
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) Press the TPS warning submenu key to display any available warning messages.
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. Press the TPS warning submenu key to display any available warning messages.
i. Press the Back submenu key to return to the Meas Setup (1/2) menu.
