SMIQ
Fading Simulation
1125.5555.03
2.85
E-9
2.9.5 Test
procedure
The following settings can be used to demonstrate how Option SMIQB49 functions:
Settings on SMIQ
General
Frequency
30 MHz
Level -10
dB
Digital Modulation (DIGITAL MOD)
STATE
ON
SOURCE
Data List
LIST
1000 0000 0000 0000 0000 0000 0000 0000 (32 bits)
MODULATION
ASK
SYMBOL RATE
1 000 000 sym/s
Fading Simulation
MOVING DELAY
ON
Reference Path
Path Loss
0 dB
Delay 0
µ
s
Moving Path
Path Loss
6.0 dB
Delay Mean
5.0
µ
s
Delay Variation
5.0
µ
s
Variation Period 10.0 s
Settings on the oscilloscope (BW > 100 MHz)
Vertical
50 mV/div, at 50
Ω
Horizontal
2
µ
s /div
Trigger level
100 mV
The test result shows a high pulse (about 150 mV), and next to it a pulse which is half as high and
moves from one side to the other accordingly to the setting
Delay Variation
or
Variation Period
.
Fig. 2-46
Pulse on Oscilloscope
