Tektronix RTX130A User Manual page 71

RTX130A QAM & VSB RF Signal Generator User Manual
For an ISDB-T file, the start packet is defined as the first-appearing packet
including an OFDM frame start flag after the specified start position. The stop
packet is defined as the packet at the front of the last-appearing packet
including an OFDM frame start flag before the specified stop position. At this
time, if the number of OFDM frames between the start packet and stop packet
is not an even number, the packet in the last OFDM frame becomes the stop
packet.
To set the start, stop, and initial positions, either use the slider (see Figure 3-5) or
enter the values directly in the text boxes.
Using the slider:
1. For the start and stop positions:
a. Press the TAB button repeatedly to select the slider. When the slider is
selected, broken lines are shown around it.
b. Press the left ( ) or right ( ) arrow button to move the slider to the place
you want to set the start position.
c. Press the TAB button repeatedly to select the Stop option button, and then
press the SELECT button. This moves the slider to the right end.
d. Press the TAB button repeatedly to select the slider. When the slider is
selected, broken lines are shown around it.
e. Press the left ( ) or right ( ) arrow button to move the slider to the place
you want to set the stop position.
f. Press the ENTER button to enable the values.
2. For the initial start position for loop output:
a. Press the TAB button repeatedly to select the Initial check box, and then
press the SELECT button. A red arrow appears on the slider.
b. Press the TAB button repeatedly to select the red arrow. When the arrow
is selected, broken lines are shown around it.
c. Press the left ( ) or right ( ) arrow button to move the slider to the place
you want to set the initial start position.
d. Press the ENTER button to enable the value.
Using the Menus
3-13