Tektronix MTG100 - Manual (Page 67)

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3Ć8
MTG100 & MTG300 MPEG Generator User Manual
Table 3Ć5: Clock dialog box parameters (Cont.)
Parameter Description
TS Bit Rate Sets the clock rate for the transport stream output. You can enter the clock
rate using one of the following methods (the first method provides greater
clockĆrateprecision):
D Enter values into the numerator and denominator fields, and then press
the Ratio Bezel button. The MPEG generator will then calculate the clock
rate based on the ratio of the numerator and denominator values.
D Enter a value into the clock rate field, and then press the Immediate Bezel
button. The MPEG generator will then calculate the numerator and
denominator fields based on the clock rate.
When you usetheExt Pclk or Ext Sclk mode, set theclock rateto thesame
valueas theinput clock signal. If you do not set thevalueproperly, thePCR
and PTS/DTS values are not updated correctly. Also, the PLL may not lock
at theworst.
Fixed ES rate Sets whether elementary stream rate is fixed or not. When you set it to ON,
the elementary stream rate becomes constant regardless of the clock rate
setting.
If you set it to ON, You cannnot set the output clock rate (TS Bit Rate) more
than thedata rateset when thefilewas downloaded.
Table 3Ć6: Bezel menu commands for the Clock dialog box
Command Description
Ratio Sets theMPEG generator to calculatetheoutput clock ratebased on the
divided ratio entered in the numerator and denominator fields of the Clock
dialog box.
Bit Rate Sets the MPEG generator to calculate the dividedĆratio numerator and
denominator values based on the output clock rate. In this mode, numeric
rounding may occur depending on the calculated value.
Default Resets all of the dialog box settings back to the factory default settings. The
default clockĆrate value is calculated based on the Packet Size setting in the
OUTPUT menu.
Cancel Cancels any setting changes and closes the dialog box.
OK Enables all setting changes. When you apply setting changes, data output
from the MPEG generator is stopped. You must restart the MPEG generator
output for the setting changes to appear.
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