Chapter 5 Configuring the Meter
Configure – Measure Tab
DSAM Help User Guide Rev. 001 71
Test Point
Compensation
Use the Test Point Compensation (TPC) screen, to mathematically
adjust DSAM level readings.
TPC better represents the level value at a common point of reference.
– For example, adding 10 dB automatically to level readings taken
at a 10 dB down tap better represents the level value on the main
distribution hard line.
– TPC affects the measurement levels of most measurement modes
on the DSAM.
– A graphical representation of the way the user-entered TPC
values affect the level readings is available by pressing the
Summary softkey while in the configuration mode.
– TPC values are saved inside each saved measurement file and
permanently associated with the file.
Also, TPC icons display for each mode.
– If a mode is created that has a total effect of 0 dB on the current
mode, the icon does not appear. The default setting of “Off” has an
effect of 0 dB.
– The total effect of the current Test Point Compensation file (if non-
zero) is displayed to the right of the icon.
– The Test Point Compensation screen can be reached within each
of these modes by pressing the keypad shortcut of Shift, 4.
– When finished with the Test Point Compensation configuration,
press Done to return to the original measurement mode.
Test point compensation applies to the following modes:
–Level
– MiniScan
– Full Scan
– Tilt
– Constellation
– DOCSIS Range (downstream results only)
– Upstream Spectrum
– Downstream Spectrum
– Ingress Resistance
21128026 R001 DSAM Help User Guide.book Page 71 Thursday, February 5, 2009 2:02 PM
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