Operating instructions

10 1892 1210 - ST500 Transmitter Operating Instructions - v2.12 / May 2007
Programming Sequential (Table or Block) Channels (24-255)
Channels 24-255, whose frequencies are set sequentially by providing a starting
frequency and a spacing, are displayed and set in the lower left panel of the window. To
set their frequencies, which can only be done as a single block:
1. Click the drop-down arrow to the right of Table Start
2. Select the start frequency in MHz from the list
3. Click the drop-down arrow to the right of Table Step
4. Select an integer multiple of the Comparison Frequency from the list
v For example, if the Comparison Frequency is 12.5kHz, enter 2 for a spacing
of 25kHz.
Downloading New Settings to Unit
As yet, the settings have only been edited in the SXn00 program. To download them to
the unit, double-click on Program Unit in the lower left panel.
v This is only permitted if the Read from Unit command was previously used to
upload settings at some point during the session.
Channel Selection Mode
Having programmed frequencies into the channels, you can specify which channel to use
(channels 0-255) or that the channel will be selected by parallel logic levels (channels 0-7
only).
The unit defaults to serial channel selection whenever it has serial communications, which
includes whenever the SXn00 software communicates with it.
To select serial control, and a channel from 0-255 (which will be used until further
commands are received), type the number into Serial Channel No in the top right-hand
panel, then double-click Program Serial Channel in the lower right-hand panel.
v The Serial/Parallel setting makes no difference, but is changed to "Serial" if
necessary.
v The channel command is sent to the unit and becomes operative
immediately.
To enable parallel channel selection mode, double-click Set Parallel Ch. Mode in the
lower right-hand panel.
v The Serial/Parallel setting makes no difference, but is changed to "Parallel"
if necessary.
v The command is sent to the unit and becomes operative immediately. The
channel number is unknown, because it depends on the logic levels applied
to three inputs as described on page 5. Serial Channel Number should be
ignored.