CATV Measurements
5–32
2715 User Manual
AURAL (FM) DEVIATION Measurement
The aural (FM) deviation measurement records and displays the peak frequency
deviation of the aural carrier on the current channel. There are two user-select-
able measurement modes: interactive and auto. Both modes require that you
select a measurement time from 10 seconds to 24 hours (in minutes). The mode
and the measurement time defaults to the last values used if you do not select
new values. Test results can be displayed and stored. Stored or current results can
be printed if you have an RS-232 interface installed in the 2715.
NOTE
. This measurement has no meaning for channels in which the aural carrier
uses AM modulation.
You make selections and run tests using the CATV MEASUREMENTS
submenu, AURAL (FM) DEVIATION, which provides the following choices:
0
RUN FM DEVIATION INTERACTIVE
1
STORE CURRENT RESULTS
2
DISPLAY RESULTS
3
PRINT CURRENT RESULTS (RS-232 Only)
4
PRINT STORED RESULTS (RS-232 Only)
5
SET UP AURAL (FM) DEVIATION
6
ENTER ADJUSTMENT MODE
9
LEAVE AURAL (FM) DEVIATION
Note that the RUN FM DEVIATION selection indicates the measurement mode
(in this example, interactive is selected).
You use the SET UP AURAL (FM) DEVIATION selection in the above menu to
do the following:
H
Change measurement modes
H
View or change the selected measurement time
The SET UP AURAL (FM) DEVIATION submenu provides the following
choices:
0
*INTERACTIVE (RESUME/ACCEPT)
1
AUTO
5
MEASUREMENT TIME 0.17MIN
When you select MEASUREMENT TIME, you are prompted to enter a new
value for the measurement time. Use the keypad to enter the new time in minutes
(0.17 minutes to 1440 minutes). If the value you enter is outside the range, an
OUT OF RANGE message displays, and the measurement time is set to the
closest limit.
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