CMN-91
Installation and Operation Manual
Operation
© 2016 Imagine Communications Corp. Proprietary and Confidential.
Revision D | Page 55
Operation
In the CMN-91, certain buttons function differently, depending on the parameters selected. Once the
function is determined, more detailed settings can be configured. This section focuses on the operation
of the CMN-91 according to the selected display. See Waveform Display (on page 55) for information
about the location of the buttons described in this section. See General Information (on page 39) for
information on how the CMN-91 operates.
Waveform Display
To access the Waveform display, press and release the WFM function button.
The waveform graticule scales, units of measure, and critical amplitude limits change according to the
video format displayed.
To access the Waveform Setup menu selection options, press and hold the WFM function button.
To clear the Waveform Setup menu, press the SETUP or the EXIT button.
The first table below shows the units of measure that appear for a video format. The second table below
lists the critical amplitude limits, which are indicated on the screen by special dashed lines for the video
formats that can be displayed.
Video Formats and Units of Measure
Video Format
Unit of Measure
High Definition and Standard Definition 525 and 625
Volts or Percent (Selectable)
Composite or Standard Definition 525 displayed as
composite (NTSC)
IRE
Composite or Standard Definition 625 displayed as
composite (PAL)
Units or Volts (Selectable)
Video Formats and Critical Amplitude Limits
Video Format
Critical Amplitude Limits
High Definition and Standard Definition
0.6125 V = upper 75% chroma limit
0.525 V = 75% luminance limit
0.350 V = 50% point; black for color
difference channels
0.0875 V = lower 75% chroma limit
Standard Definition 525 as Composite (NTSC)
7.5 IRE - black level
