Atec Wavetek-JDSU-SDA-4040D - Manual (Page 4)

Tilt Measurement. Tilt is the
easiest and most efficient tool
for balancing amplifiers. For
cable plants requiring multiple tilt mea-
surements, such as comparing today’s tilt
measurement with a historical record, and
then making an additional measurement
for a new wider channel plan, the user sim-
ply uses markers to indicate the tilt chan-
nels that define the new limits.
! Tilt mode performs automatic tilt calculations
between any 2 of 9 designated carriers.
The CTB/CSO mode is used for
automatically making intermod-
ulation measurements.
Scan Measurement. Scan
mode provides a quick graphical
view of the entire channel plan
with bars representing the video level for
each channel. Both video and audio may
be displayed.
! Limit checks can be instantly viewed after
identifying channel of interest with a marker in
scan mode display.
Carrier-to-Noise Measurement:
In-Service. Carrier-to-noise
measurement (on non-scram-
bled channel) is just as easy,
and there is no need to remove modula-
tion from the video carrier. No tunable pre-
selector filter is needed.
! In-service carrier-to-noise.
Hum Measurement: In-Service.
Measuring hum on a channel
(non-scrambled) is as simple as
pressing the "HUM" key. And since the
instrument is battery powered, the measure-
ment is independent of ground loops, there-
fore isolated from the line (mains). Hum
reveals itself as either single (60 Hz) or dou-
ble (120 Hz) horizontal bars across the video
screen. The level of either can be measured.
! In-service HUM (PAL & NTSC compatible).
Modulation Measurement.
Includes NTSC, PAL and SECAM
formats. Demodulation of the
audio is done for both AM and FM. FM is
used to hear audio distortion on the FM
radio channels or the sound of the TV pro-
gram. AM is used to recognize short-wave
interference signals in the reverse band.
! Depth of modulation.
Other SDA
Materials Available:
The following WWG
materials are available.
Inside the U.S., please call
toll-free at 800-622-5515
or 317-788-9357. For
faster service, please visit
our website at
www.wwgsolutions.com.
• Wavelengths newsletter
• SDA-5000 Data Sheet
• PathTrak Field View
Option “How It Works”
• App Note #1, Forward
Sweep and Balance
• App Note #2, Reverse
Sweep and Balance
• App Note #3, Return
Path Troubleshooting
• SDA-5000 Sweep
Training CD-ROM