Model Two & Model Two Lite - Operation Manual
12
Tilt and Favorite Group Display
Press
TILT
to display a graph showing the amplitudes of up to twelve user-selected video
carriers. This display also shows the calculated difference in amplitude (tilt) between the
highest and lowest channels in the user-selected group. Press
TILT
again, and the Model Two
displays a numeric list that shows the amplitudes of the carriers in the group.
Single Channel Display
When tuned to a single channel, the Model Two displays bar graphs for the video and audio
carriers. It also shows numeric readouts of the carrier amplitudes and V/A difference.
Single Channel Spectrum
The Model Two can also provide a spectral display of the selected channel including
intermodulation products or other undesired signals that may be present.
Scan Display
Press
SCAN
to display the full span of video and audio carriers in the selected User Channel
Plan. This mode is useful to make a quick check of your system’s overall flatness and
amplitude. Up to 5 User Plans may be stored.
Amplitude limits can be imposed on the display. By using the Model Two’s frequency marker,
you can zoom in on any suspect channel that appears in the display.
Spectrum Display
Press
SPECT
to display the spectrum measurements with frequency spans from 2.5 MHz to
62.5 MHz or a full-spectrum scan.
Carrier-To-Noise (C/N)
Press
C/N
to measure the C/N ratio of the CATV transmission system.
Digital Channel Measurement
The Model Two includes a special single-channel mode you can use to measure the actual
power of a QAM signal. The single-channel spectrum display shows the actual shape of the
modulation “haystack”. This feature provides you with a powerful tool for checking in-channel
flatness or mismatches that might affect digital transmission quality.
