Level Functions - Promax MO-160 Manual De Usuario

USER'S MANUAL. MO-16X
When entering this function, the display shows the current frequency and the step
used to modify it, if the encoder is turned. Frequency increments are positive when
turning CW and negative if CCW. The LCD panel looks as follows:
MENU: back PUSH: select TURN: next/prev.
RF Frequency: 650000000 Hz <10 MHz>
In this case, the current output frequency is 650 MHz and turning CW one notch
(each notch is marked by an audible tone) will change that value to 660 MHz.
In this situation, each time we press the encoder button, the frequency step will be
modified to 1 MHz, 100 kHz, 10 kHz, 1 kHz, 100 Hz, 10 Hz, 1 Hz and again to 10 MHz,
allowing a cyclic selection of the desired step value.
To quit this function, the MENU key must be pressed.
Channel: Using the set of channel tables included in the MO-16X makes the
output frequency tuning faster. This allows direct selection of standard frequencies
used in most countries.
Entering this function, a list of all available channels is displayed sequentially.
Turning the encoder will lead us to the desired one. Pushing the encoder selection key
will exit that function.
The channel list is taken from a set of channel plans loaded into the equipment.
The available channel plans are displayed and selected from the CONFIGURATION
menu, as we'll see later.
Also in this case, frequency changes are applied immediately to the RF stage,
allowing an interactive frequency adjustment.
The list of channel plans can be found in Appendix A.
Disable: This option is to disable the RF output. This is performed by introducing a
strong attenuation (around 80 dB) to the RF signal. At the same time, the IF
frequency is tuned to a nominal value of 36 MHz. The selectable values are:
• NO
• YES
4.6

LEVEL functions

This menu item collects the functions related to RF level adjustment. The MO-16X
has a built-in programmable attenuator of 60 dB, in 1 dB steps. At the same time, the
nominal RF level can be finely adjusted using a voltage controlled attenuator. This
allows to set a reference level using the voltage controlled attenuator, to then apply the
mentioned 1 dB attenuation steps to that reference value.
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