F R O N T C O N S O L E C H A P T E R 7
(22) RF (Radio Frequency Gain)
This control sets the maximum gain of the AGC. It is the same control as can be found on the Setup Form-
DSP Tab, AGC/ALC Sub-Tab. Although strictly speaking this control does not set the RF gain, it is
denoted as such on the front console as its operational use is identical to that of a true RF gain control.
(23) Drive (Transmitter Power Output/Tune Power)
This control adjusts the percentage of maximum power that will be available in transmit mode. A typical
setting for the 1W SDR-1000 radio might be 50% (roughly 500mW), while a radio configured with the
100W PA may be operated at full power (100W) into a proper 50 ohm load. The Drive control may be
adjusted while in either receive or transmit mode.
Note: The control doubles in function as the power level setting for the TUN
(Tune) button described above. The Tune power may be adjusted while
the TUN button is activated or by using the control on the Setup Form-
Transmit Tab.
While great care is taken to ensure that this value is accurate and that selecting a Drive value will give
approximately that amount when using the 100W PA, there are variances in the filter components and
transmitter characteristics that make it difficult for this to be exactly right over the whole range (1-100).
When using the 100W PA, these values are most likely to be accurate on the higher end. For example, it is
not unusual if you select 10 on the Drive control, but only see something like 5W out. This was a design
decision made to favor the higher power users. This will likely be improved in the future with a more
accurate algorithm.
(24) AGC (Automatic Gain Control)
This control sets the receiver Automatic Gain Control to one of the following settings: Fixd (Fixed), Long,
Slow, Med (Medium), Fast, or Custom. The Custom setting uses the controls on the Setup Form-DSP Tab,
AGC/ALC Sub-Tab. The following table details the AGC parameters used in the various settings.
Table 6: AGC Setting Details
Setting Attack Decay Hang Fast Hang
Fast 2ms 100ms 100ms 100ms
Med 2ms 250ms 250ms 100ms
Slow 2ms 500ms 500ms 100ms
Long 2ms 2000ms 750ms 100ms
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63 ď›™FlexRadio Systems
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