Chapter 11
Measure Mode – Sweep Tab
Reverse Sweep
282
DSAM Help User Guide
Rev. 001
Measurement
Information Area
The reference filename, test point compensation icon/value, and the
number of users using (if reverse sweep) appear in this area above the
graph.
When a sweep limit value is entered, a pass/fail indicator also is
displayed on the far left side of the subtile bar above the graph.
Graph
The graph updates with each new set of sweep data received by the
meter. If Sweep Limit is turned ON, a pair of horizontal markers appear
on the screen to indicate the limit boundaries based on the limit value
entered. These appear only when sweep limit value is ON within
Sweep Settings. An error message automatically is displayed if the
sweep telemetry level is too low.
Graph Information
Bar
This area consists of the start and stop frequencies (as provided by the
sweep plan transmitted from the headend transceiver) and the sweep
telemetry level. The sweep telemetry level can be converted to dBmV,
dBm, etc., from the configuration settings of the DSAM. If zoom is
active, a zoom icon also is displayed and the start and stop frequen-
cies are updated to match the zoom view
Marker Status Area
The Reverse Sweep measurement mode also contains an area
referred to as the Marker Status area (below the Graph Information
bar). This area consists of the marker name (A or B), marker frequency
Figure 253
Measure Mode – Reverse Sweep
Measurement
Information Area
Graph Information Bar
Graph
Marker Status Area
NOTE
The sweep attempts to use the last used reference file. If the last
reference file is incompatible with the current sweep plan, or if there
is no reference file, the entry REF field displays “NONE.”
21128026 R001 DSAM Help User Guide.book Page 282 Thursday, February 5, 2009 2:02 PM
