Wavetek 147 Especificações descarregar pdf (Página 304)

SDA-5500/SDA-5510 Sweep Configuration: Forward Sweep Configuration (SDA-5500)

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• Scrambled: Select Yes if the channel is scrambled. When a channel is

designated as scrambled, the sweep will only look at the video carrier as

a sweep reference, instead of both the video and audio carrier. Note: a

diamond will appear to the left of the channel type indicator on most

screens.

• Audio Offset: Specifies the audio offset of the channel.

• Audio Offset 2: Specifies the offset for the second audio carrier of a

Dual type channel.

• An Add and Delete soft key allows for adding new channels to the plan

or deleting existing channels from the plan.

• Press the Exit soft key to return to the Edit Channel Parameters display.

• Delete Unused Channels: After the channel plan has been built,

unused channels can be deleted if desired. Doing this frees memory for

other uses and "unclutters" the channel plan. Select the Delete Unused

Channels in the CHANNEL PLAN menu and press ENTER.

CAUTION ! Don't delete unused channels until sweep

points are built.

• Build Sweep Points: After the channel plan has been built, the build

sweep points function will convert all disabled channels to sweep

insertion points. Select Build Sweep Points from the menu and press the

ENTER key.

• The display will prompt you to enter the number of sweep points that

each disabled channel will be converted to. (Acterna recommends you

convert each disabled channel into 1, 2, or 3 sweep points.)

• If sweep points are entered in the following frequency ranges, they will

be automatically shifted to avoid measurement inaccuracies (all

frequencies in MHz):

197.88 to 198.12 lower to 197.87

385.63 to 385.87 lower to 385.62

441.13 to 441.37 lower to 441.12

496.13 to 496.37 lower to 496.12

524.38 to 525.62 raise to 525.63

620.13 to 620.37 lower to 620.12

703.63 to 703.87 lower to 703.62

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Wavetek 147 Especificações Página 304