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2 OPERATING INSTRUCTIONS
The following operating instructions assume the user's knowledge in
operating the MO-170, as described in its user's manual.
2.1 Access to main menu functions
Pressing MENU key, takes us to the main status display.Turning the encoder CW
or CCW, cycles through the submenu titles:
1. MODULATOR
2. RF
3. LEVEL
4. TEST
5. NOISE
6. ECHOES
7. CONFIGURATION
2.2 Noise generator functions. (NOISE)
This menu item collects the functions related to the digitally synthesized white
noise:
Generator: Turns the noise generator ON/OFF.
C/N: Selects a C/N ratio value from 3 to 40 dB in +0,1 dB steps.
Suppress Carrier: Turns ON/OFF the COFDM signal to which the white
Gaussian noise is added.
2.3 Channel simulator. (ECHOES)
This menu contains a series of parameters to be defined in order to simulate
terrestrial transmission channels:
Generator: Turns the channel simulator ON/OFF.
ECHO 1: Sets the parameters for the first channel tap (Reference Echo). This tap
exhibits zero delay and is taken as the reference of the time base for all the other
echoes. Note that its amplitude is not necessarily 0 dBc. This allows to define
channels with preechoes, i.e.: channel profiles whose tap of maximum amplitude
is not the first one.
Page 6
OP-170-E USER'S MANUAL
06/2006
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