Vaisala RVP900 - Set or Clear User LED (SLED); TTY Operation (TTYOP)

2. Enable synchronized operation by setting the Ena command bit. Set or clear, EL and
BCD according to your needs.
These bits may be used independently of reloading the table values. Thus, antenna
synchronization may be turned on and o without having to reload the table each time.
If there are errors when the table was last loaded, the processor ignores the Ena bit
and synchronization is forced o.
Once enabled, PROC commands are issued in the usual manner to acquire and process
the radar data. Either the single-cycle or free-run PROC mode may be used. Data
collection proceeds as usual, except that the rays are automatically aligned with the
trigger angles.
The angle sync algorithm is dynamic and works as follows:
a. Each ray begins immediately upon the user's request, or upon completion of the
previous ray when in continuous processing mode.
b. At the start of the ray, RVP900 finds the pair of sync angles that enclose the
previous trigger angle.
c. The current ray then runs until the antenna passes outside of either limit, at which
point processing for that ray is terminated.
d. Once this happens, a new trigger angle is assigned based on which limit was
crossed.
3. In the Sample Size
field of the SOPRM command, specify the maximum number of
pulses present in each ray during angle syncing .
This is the number of pulses that used when Dyn=1.
When Dyn=0, the number of pulses may be less if a trigger angle is crossed before the
full pulse count can be accumulated
8.17
Set or Clear User LED (SLED)
SLED turns the red user LED on and o under program control. The LED is on during the
initial running of internal diagnostics, and then remains o unless changed by this
command.
Note that the red LED can be configured to serve as an internal activity indicator (see 5. TTY
Non-volatile Setups (page 87)), in which case this command has no
eect.
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
---------------------------------------------------------------
| | | | | | | | | | | | | | | | |
| |LED| | 1 0 0 1 0 | Command
|---------------------------|---|------------|-------------------|
8.18
TTY Operation (TTYOP)
TTYOP controls the TTY chat mode interface to the host computer. The command can
simulate the typing of characters on the RVP900 setup TTY.
RVP900 User Guide M211322EN-J
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