CATV Measurements
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2715 User Manual
NOTE
. You can print measurement results only when the RS-232 interface is
installed in the 2715. The GPIB interface does not support the print function.
Be sure to select handshaking ([UTIL] [4] [0] [2] [5]) to match that expected by
the printer.
12. Press [3] to print results of the last measurement performed. A printer must
be connected to the 2715.
13. Press [4] to print all stored results of the measurement; a printer must be
connected to the 2715.
Auxiliary Operations
The following auxiliary operations involve viewing a display. Each selection
toggles the desired display on and off.
Press [9] repeatedly until page 2 of the CATV MEASUREMENTS menu [CATV
MEASUREMENTS (PG 2)] is displayed. Note the following items in the menu:
1
VIEW MODULATION (FIELD)
2
VIEW MODULATION (LINE)
3
VIEW PICTURE
4
LISTEN
These features are selected by pressing the number that applies to each, and
deselected by pressing the same number or pressing a number that applies to
another feature.
This operation allows you to view a full field of baseband modulation in the
analog mode.
This operation is not available for FM, DATA, and PILOT signals.
If this current channel has scrambling on (as specified in the channel table), you
are prompted to turn off scrambling before proceeding. The needed trigger
modes will not work with scrambling.
When the operation is invoked, the 2715 tunes to the visual carrier and enables
the 1 MHz resolution bandwidth filter and zero span.
The 2715 then finds and centers the peak of the visual carrier and places it at the
reference level. The display storage and readouts are turned off, and short holdoff
is selected for an analog display.
The 2715 sets the sweep time to 2 ms/div and the trigger mode to TV Field
trigger.
View Modulation (Field)
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