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M3SR Series 4100
3.7.2 Fixed Frequency Operational Menus
More than in any other frequency range, the short wave operation with legacy waveforms –
like single sideband modulation – is still very important. It is called Fixed Frequency operation
here, in contrast to Frequency Hopping waveforms like SECOM-H or waveforms with auto-
matic link establishment (ALE).
Please be aware that within the communication mode ALE there are Fixed Frequency oper-
ational menus as well. Due to the automatism within the ALE, not all parameters are avail-
able there, but otherwise the menu layout is the same as described below.
Menu Structure of Fixed Frequency Operational Menus
Within Fixed Frequency Preset Pages, the radio supports the following classes of emission:
A1A, A3E, R3E, H3E, B8E, B7D, F1D, F3E, J3E (LSB, USB), J2D (LSB, USB)
Where needed, the MMI representation uses the '+' to indicate the Upper Sideband (USB)
and the '-' for the Lower Sideband accordingly.
Default Values
When selecting a class of emission like +J3E (single sideband operation in the upper side-
band), all dependent parameters are set to their default values, fitting most of the needs and
simplifying the manual operation. That means for instance a default Rx bandwidth setting of
2400 Hz for +J3E.
However, if this default settings does not fit the needs, they can be changed by pressing the
corresponding softkeys.
Depending on the class of emission chosen, the number of available settings and their pos-
sible values are changing as well. In F3E for instance, due to the demodulation method, there
are no AGC and MGC functions and settings needed. To keep the MMI as simple as possi-
ble, the corresponding softkeys are suppressed in these cases.
For each modulation mode the FF Operational menu (FF OP) structure and softkeys may
vary.
Operating Manual 6175.4760.02 – 01
Fixed Frequency Operational Menus
3.129
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