Test Point Compensation - JDS Uniphase DSAM-3500 User Manual

21128026 R001 DSAM Help User Guide.book Page 71 Thursday, February 5, 2009 2:02 PM
Test Point
Compensation
DSAM Help User Guide
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
Rev. 001
Chapter 5 Configuring the Meter
Configure – Measure Tab
71