Chapter 10
Measure Mode – Spectrum Tab
Field View
258
DSAM Help User Guide
Rev. 001
–
5 dB/div
or
10 dB/div
– Enables you to adjust the vertical
resolution of the graph for the best viewing.
–
Zoom
– Turns Zoom on and off. When zoom is on, it displays a
10MHz span centered around the current position of the active
marker.
–
Peak Hold
– Turns Peak Hold on and off. When Peak Hold is
turned on, it displays the highest level trace at each frequency
for an extended view of the noise isolation.
–
Reset
– Manually resets the Peak Hold function.
–
Upstream Spectrum
– Displays the Upstream Spectrum
screen.
–
Pause (Shift, 8)
– Suspends measurement updates.
–
Marker A
– Sets Marker A as the active marker. (Use the left
and right arrow keys to move the marker.)
–
Marker B
– Sets Marker B as the active marker. (Use the left
and right arrow keys to move the marker.)
3
Press
ENTER
.
Field View
The Field View measurement mode (additional purchase required) is
provided for use with PathTrack or Phasor monitoring systems. It
yields:
– Remote spectrum display of the upstream (return) path as
selected for broadcast
– Increased troubleshooting accuracy by allowing you to compare
spectrum measurements at the node with the current conditions at
the headend
– A Return Signal Generator (RSG) can be requested at time of
purchase
The RSG provides a continuous wave (CW) signal on the upstream
path that is frequency and level configurable. This signal enables you
to verify the Field View two-way functionality and may be used to
determine the return path viewed by PathTrak or Phasor monitoring
system.
21128026 R001 DSAM Help User Guide.book Page 258 Thursday, February 5, 2009 2:02 PM
