User's Manual

RVP8 User’s Manual
October 2005
TTY Nonvolatile Setups
3–33
Start bin:0, Width:10 bins, Bands:16
This question is only asked if we are simulating output rays. The Start Bin chooses
the bin number (origin zero) where the simulated bands will begin. The width of
each band (in bins), and the total number of bands are also selected. The upper limit
for all parameters is the maximum bin count for the RVP8.
Limits: Start: 0-Max, Width: 1-Max, Bands: 1-Max
Start data value:0, Increment:16
This question is only asked if we are simulating output rays. The data value that will
be assigned to the first simulated band, and the data increment from one band to the
next, are selected. The permissible values are from 0 to 65535, i.e., the full unsigned
16-bit integer range. This full range is useful when simulating 16-bit output data; for
the more typical 8-bit output formats, only the low byte of the start and increment are
significant.
Limits: 0 to 65535
Real Time TTY Monitor: NO
The Real Time TTY Monitor is a stream of characters that are continuously sent to a
serial output of the RVP8, and which monitors selectable internal variables. When
this live monitor is enabled, status lines will be printed continuously. You may
choose the update rate, and which parameters are to be printed, using the questions
that optionally follow.
Pathname of TTY/FIFO: ’/dev/ttyS0’
Serial data rate:
Update rate: 2.00 lines/sec
Show burst frequency: NO
Show burst pulse power: NO
Show AFC information: NO
Show pulse width: NO
Show PRF: NO
Show LOG noise: NO
Show Polarization: NO
Show IFD and link info: NO
Show burst timing slew: NO
Most of the data fields are printed in self-explanatory scientific units. The PRF is in
Hertz, but is printed without an “Hz” suffix. For historical reasons, the LOG Noise is
printed in old fashioned 8-bit A/D units, taken as the upper eight bits of the 12-bit
long LOG format described in Section 6.7. An 8-bit NSE value may be converted to
an absolute dBm level using:
dBm + P
Max
) 16 s
(
NSE * 224
)
Where s is the LOG Slope (nominally equal to 0.03), and
P
Max
is +4.5dBm for the
12-bit IFD and +6.0dBm for the 14-bit IFD.