User's Manual Part 2

RVP8 User’s Manual
April 2003
TTY Nonvolatile Setups (draft)
3–34
Noise level for simulated data: –50.0 dB
This is the noise level that is assumed when simulated “I” and “Q” data are injected
into the RVP8 via the LSIMUL command. The noise level is measured relative to the
power of a full-scale complex (I,Q) sinusoid, and matches the levels shown on the
slide pots of the ASCOPE digital signal simulator.
Limits: –100dB to 0dB
Simulate output rays: NO
Answering ”YES” to this question causes the RVP8 to output bands of simulated
data. The bands can occupy a selectable range interval, and span a selectable interval
of data values.
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 (which depends on board
configuration, and number of attached RVP8/AUX boards).
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
3.3.8 Mz — Transmitter Phase Control
These questions are used to configure the 8-Bit phase modulation codes that may be used to
control the phase of a coherent transmitter. The RVP8 will output a pseudo-random sequence of
phase codes that are chosen from a specified set of available codes, i.e., all 8-bit patterns that are
valid for the phase modulation hardware. The random sequence is output only when the RVP8
is in one of its random phase processing modes (time series or parameter). At all other times, a
fixed “idle” phase code pattern is output. See also Sections 3.3.1 and 3.3.5 where related phase
control questions are found.
8–Bit code to output when idle: 0x00
This is the bit pattern to be output whenever the RVP8 is not in a random phase
processing mode. Note that this “idle” code does not have to be one of the
“active”codes that are enabled below.
Selection of Valid 8-Bit States
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00–0F: Y – – – – – – – – – – – – – – –