HP 8920A, User Manual

Page: 319 / 658

319
Chapter 8, Signaling Decoder Screen
NMT Decoder
Input Level
This field specifies the signal level that you input. The higher the level of signal
expected by the analyzer, the higher the trigger level is set.
Operating Considerations
The unit-of-measure is determined by the
AF Anl In
setting.
The input level should be set high enough to prevent false triggering, but low
enough to allow triggering for fluctuating signal levels.
De-emphasis can greatly affect the input level required for proper decoding.
When decoding NMT data streams, you should turn de-emphasis off (controlled
by the
De-Emphasis
field on the AF ANALYZER screen.)
See Also
Trig Level
field description, on page 288
Load Test
This double field is used to select and load NMT tests from a variety of mass
storage devices. After the appropriate Mass Storage device is selected using the
field on the right, the desired NMT test is selected using the field on the left.
Operating Considerations
Directly entering a command into the
NMT Test Entry
field automatically
removes from memory any NMT test previously loaded using the
Load Test
field.
NMT Test Entry
See
"Using Direct Command Entry" on page 328
.
nmt-load.wmf