Operating instructions

1892 1344 - SX450G Transceiver Operator Guide v1.7 / Nov 2007 17
PROGRAMMING THE UNIT
Three steps are necessary:
v Upload (read) values from the unit
v Edit the values
v Download (write) values to the unit
Reading Current Unit Settings
First, you must read into the computer what is in the unit’s memory at present. To do this,
press F5 or select Link > Read from the Unit > Upload All from SX450G. The data
replaces the defaults on the screen and fills in the unit details.
v The program insists that you do this before allowing you to reprogram the
unit to make it less likely that inappropriate values be entered.
v However, once you have uploaded during a session, you may edit and
download the data to as many units as you wish.
Selecting Table Type
The SX450G can hold either a table of 80 individually-chosen Tx frequencies and Rx
offsets, or a table of 256 equally-spaced Tx frequencies all with the same Rx offset.
To select the table type, select Parameters > Number of Channels > 80 or 256.
Programming 256 Channels as a Block
It is necessary to specify the starting frequency (the lowest, corresponding to channel 0),
a spacing or step value, and an Rx offset. The spacing is expressed in multiples of the
Comparison Frequency (including 0, which makes all frequencies the same).
Double-click the Tx Frequency value for channel 0 in the main frequency table, which
brings up this dialog:
Figure 8 - Frequency Programming Dialog