Performing Spectrum Measurements - JDS Uniphase Wavetek DSAM-3500B Quick Start Manual

Chapter 2 DSAM Meter Operation
Using Measure Mode
Performing
Spectrum
Measurements
34
Figure 20 Miniscan Mode Screen
To configure the Miniscan measurement feature, select:
the channel plan to be tested, up to twelve channels for
Miniscan measurement, a set of measurement limits
(based on test location), the parameters of those limit sets,
and the resolution of the Miniscan graph for the best
viewing.
Use the up and down arrow keys to adjust the reference
setting of the graph by one (1) dB per key press. Use the
right and left arrow keys to move the vertical marker to the
next or previous channel.
Upstream Spectrum Mode views and analyzes ingress
and distortion on the upstream (return) path. Initial
measurements typically occur at the ground block with the
home disconnected from the network.
To access Upstream Spectrum Mode, use the arrow keys
to highlight the Upstream Spectrum option on the Measure
mode menu (Figure 17 on page
press the Shift key and the Spectrum softkey.) The first
Upstream Spectrum mode screen you see will look similar
to Figure 21 on page
DSAM Product Family Quick-Start Guide Rev. 001
31), and press Enter. (Or,
35.