FlexRadio Systems Flex-3000 User Manual

F R O N T C O N S O L E C H A P T E R 3
(20) ATU and BYP
The ATU and BYP buttons are clicked to respectively activate and bypass the internal ATU. They also
indicate the various states of the ATU as shown in Figure 56 below.
ATU/BYP Situation
BYP clicked
ATU clicked, but SWR already OK
Band changed
ATU clicked and match is found
ATU clicked and match not found
Figure 56: States of the ATU and BYP buttons
Initially when you start PowerSDR or whenever you change the band the internal automatic antenna
tuner will be bypassed, as indicated by the BYP button being active (yellow) and ATU button being
inactive.
Press ATU to initiate a tuning cycle. The ATU first measures the SWR.
 If SWR is OK, then no further action is taken and the ATU remains bypassed.
 If SWR is not OK, a tuning cycle is started
o If a match is found, the ATU button turns green.
o If a match cannot be found, the ATU button turns red and BYP yellow
Note: When operating Split, any change of the receive and/or transmit
band (e.g. cross-band operation) will bypass the ATU.
(21) AF (Audio Frequency Gain)
This control sets the audio gain. It may also be adjusted by pressing the + (plus) and – (minus) keys
on the numeric keypad. For best performance set the external speaker volume control to the high end
of the scale so that the AF control can be set to a lower value.
(22) AGC-T (AGC Maximum 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 (page 90). The operational use of the AGC control is essentially the
same as that of an RF gain control found in more traditional receivers.
58  2003-2009 FlexRadio Systems

FlexRadio Systems Flex-3000 Specifications

General

Brand	FlexRadio Systems
Model	Flex-3000
Category	Transceiver
Language	English