User's Manual

RVP8 User’s Manual
October 2005
TTY Nonvolatile Setups
3–34
3.2.8 Mz — Transmissions and Modulations
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/Tx 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 3.2.1 and 3.2.5 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
–––––––––––––––––––––––––––––––
00–0F: Y – – – – – – – – – – – – – – –
10–1F: – – – – – – – – – – – – – – – –
20–2F: – – – – – – – – – – – – – – – –
30–3F: – – – – – – – – – – – – – – – –
40–4F: – – – – – – – – – – – – – – – –
50–5F: – – – – – – – – – – – – – – – –
60–6F: – – – – – – – – – – – – – – – –
70–7F: – – – – – – – – – – – – – – – –
80–8F: – – – – – – – – – – – – – – – –
90–9F: – – – – – – – – – – – – – – – –
A0–AF: – – – – – – – – – – – – – – – –
B0–BF: – – – – – – – – – – – – – – – –
C0–CF: – – – – – – – – – – – – – – – –
D0–DF: – – – – – – – – – – – – – – – –
E0–EF: – – – – – – – – – – – – – – – –
F0–FF: – – – – – – – – – – – – – – – –
This set of questions defines the subset of active 8-bit codes that are valid states for
the transmit phase modulator. Answer each line with a sequence of Y’s or N’s to
indicate whether the corresponding 8-bit code is enabled. Only the codes that appear
with a “Y” will be used by the RVP8; the “–” indicates an unused code. The “–’
character was used instead of “N” so that the visual contrast of the printed table
would be improved.
As an example, if your klystron transmitter has an octant phase modulator that is
controlled by three digital lines, you might enable phase codes zero through seven,
and then cable the modulator to the low three bits of the 8-bit code. The upper five
bits would not need to be used in this case.