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Chapter 4 Measurements
4.2 SLM Measurements
Select the SLM Single Channel or Scan icon. Single channels or a
complete scan of all the channels can be measured. Pass/Fail Limits
are used to test the measurement results, based on the location. Failing
measurements are displayed in red.
Locations for manual SLM and scan tests are selected by pressing the Location key (Shift F3). A pop-up window will allow the
user to use the arrow keys to select a new location: Ground
Block, Tap or Set-Top.
4.2.1 SLM Mode
In the SLM mode the CM1000 automatically switches between
analog and digital signals, based on the administrator programmed channel plan. The initial setting when the SLM mode
is selected allows the user to enter channel numbers and press ENTER
or use the arrow keys to sequence through the channel table.
Figure 4-34
Tuning—Select channel or frequency tuning mode by pressing the F1
Ch/Freq function key to highlight the channel number or frequency.
Then enter the channel or frequency on the keypad or use the arrow
keys to scroll through the channels in the active Channel Table. The
measurement results for each channel are displayed graphically with
a numeric readout of the channel, frequency, video carrier level, audio
carrier level, 2nd audio carrier level (if used), V/A (video to audio) ratio,
modulation type and adjacent channel video carrier ratio.
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