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Operation
3.3.1.1
Configuration Demodulator Menu
Refer to Figure 3-4.
RX-DR QPSK 1/2
RX-SR QPSK 1/2
3–10
Notes:
1.
Figure 3-4 is reflective of the demodulator menu without
G.703 data interface installed.
2.
Figure 3-4A is reflective of the demodulator menu with G.703
data interface installed.
Programs the demodulator data rate (DR), in 1 bit/s steps, limited by code
rate and data interface.
On entry, the current data rate is displayed with the flashing cursor on the
first character. Press [←] or [→] to move the flashing cursor. Press [↑] or
[↓] to increment or decrement the digit at the flashing cursor. Press
[ENTER] to execute the change.
Notes:
1. Programming is done by either data rate or symbol rate. Data rate
refers to the equivalent serial data rate at the data interface
connector.
2. Symbol rate refers to the modulation rate after framing, trellis
(Viterbi) coding, and Reed-Solomon coding are applied.
3. The framing type selection affects the symbol rate (if programming
from the data rate [RX-DR] menu), or the data rate (if programming
from the symbol rate [RX-SR] menu).
a. If data rate is programmed, the symbol rate menu is updated to
reflect the code rate and framing selections.
b. If symbol rate is programmed, the data rate display is similarly
updated.
Programs the demodulator symbol rate (SR), in 1 sym/s steps, limited by
code rate and data interface.
On entry, the current symbol rate is displayed with the flashing cursor on
the first character. Press [←] or [→] to move the flashing cursor. Press [↑]
or [↓] to increment or decrement the digit at the flashing cursor. Press
[ENTER] to execute the change.
Notes:
1. Programming is done by either data rate or symbol rate. Data rate
refers to the equivalent serial data rate at the data interface
connector.
2. Symbol rate refers to the modulation rate after framing, trellis
(Viterbi) coding, and Reed-Solomon coding are applied.
3. The framing type selection affects the symbol rate (if programming
from the data rate [RX-DR] menu), or the data rate (if programming
from the symbol rate [RX-SR] menu).
a. If data rate is programmed, the symbol rate menu is updated to
reflect the code rate and framing selections.
b. If symbol rate is programmed, the data rate display is similarly
updated.
SDM-2020 Satellite Demodulator
Rev. 3
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