Chapter 7 __________________________________________________ Host Computer Commands
VAISALA______________________________________________________________________ 329
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7.27 Configure Phase Modulation (CFGPHZ)
This command configures the RVP900 phase control output lines, which
determine the relative phase of each transmitted pulse. In some cases the
phase sequence that is chosen will also have side effects elsewhere in the
processor, for example, different algorithms may be used in Random Phase
mode according to the transmit sequence that is requested.
Some of the phase sequences chosen by CFGPHZ also expect additional
arguments to have been supplied by the XARGS command. Phase
sequences are expressed as a list of N 16-bit binary angles representing the
desired phase sequence. The sequence is assumed to be periodic with
period N. The Mz command defines the correspondence between phase
codes and phase angles, and is described in Section 4.2.8 Mz —
Transmissions and Modulations on page 137.
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Now Forces the hunt procedure to be started even if the burst
pulse is already present. Normally the procedure will only
be started when the burst pulse is missing at the time
BPHUNT is given.
PhSeq=0 Selects No Modulation. The RVP900 outputs a constant
default phase request as defined in the Mz menu.
PhSeq=1 Selects a Random Phase sequence. This is also the default
phase modulation that will be output following power-up.
From the set of valid phase codes that are defined in the
Mz setup section, a random code is automatically chosen
for each pulse. Each code has an equal probability of being
chosen each time, and the choice is independent of any
previous state. No XARG words accompany this
command.
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