Table of Contents
Advertisement
AM5(e) Classic Instruction Manual
10.
To set a displayed parameter value, use the arrow keys, as needed.
11.
Repeat steps 8 through 10 until all values desired have been set. Then
select measurements (step 8).
12.
To run the impulse noise test, press the START/STOP key. The IMPULSE
NOISE RUNNING indicator will flash while the test is being run.
NOTE: For Impulse Noise with Tone test, "no TonE" will be displayed and test
will not start if hold tone is not being received by the AM5(e) Classic
13.
To observe the measurements while the test is running, press up- or
down-arrow key until the desired measurement is displayed.
14.
The test will stop when the duration has been reached, or the test may be
stopped manually by pressing the START/STOP key so the IMPULSE
NOISE RUNNING indicator is not lighted.
15.
After the test is stopped, the final measurements should be reviewed by
performing steps 2 – 5.
6.7.3 Evaluation of Measurement Data: Although the noise, and counters can
be observed while the test is in progress, the final evaluation should be
made after the test has stopped.
Figure 6-3 graphically shows an impulse noise test. Default parameters
are shown in bold boxes and type, while example final measurements are
shown in light boxes and type.
1.
While the test is running, impulse spikes that exceed one of the three
thresholds set the counters as shown by sequence number following each
spike.
2.
The blanking interval, shown by cross-hatch, prevents any counts from
being registered for a short period of time after a pulse is received. This is
illustrated in Figure 6-3 by the uncounted spikes within the cross-hatched
areas.
3.
Noise is constantly measured. For an AM5 Classic the measurement will
reflect the average RMS measurement in dBrn.
For an AM5e Classic, the noise measurement will reflect the average RMS
noise unless either UNWTD Q PEAK or SWTD Q PEAK filter was
selected for Q PEAK detection. The Q PEAK measurement will be for
peak noise. All AM5e Classic measurements are in dBm.
November 19, 1997
(18-0047)
MEASURE FUNCTIONS
Page 6-12
Advertisement
Table of Contents
