Configuration demodulator, 2 configuration demodulator – Comtech EF Data C5 User Manual
Page 139
C5/K1/K3 Integrated Satellite Terminal System
Operation
Rev. 0
4–13
4.1.3.2 Configuration
Demodulator
Refer to Figure 4-5.
RX-x /Type/Code Rate
Receiver code rate/type selection. Select one of four (A, B, C, or D)
pre-defined receiver decoder/data rate combinations or a variable rate
selection (V).
Code Rate
Data Rate Range
BPSK 1/2
2.4 to 1250 kbit/s
QPSK 1/2
4.8 to 2500 kbit/s
QPSK 3/4
7.2 to 3750 kbit/s
QPSK 7/8
8.4 to 4375 kbit/s
Notes:
1. Maximum Symbol Rate: 2500 kbit/s.
2. Maximum Data Rate for Low Var. Rate: 512 kbit/s.
Upon entry, the current receiver rate is displayed with the flashing
cursor on the first character of the code rate on line 1. The data rate is
displayed on line 2. Press [
$
] or [
%
] to select one of four pre-defined
rates (A, B, C, or D). To select the currently defined variable data
rate, select RX-V, and press [ENTER] twice.
To change the rate using the variable rate selection, press [ENTER]
when RX-V is displayed. A flashing cursor is displayed on the first
character of the coding type on line 1. Press [
"
] or [
#
] to move the
flashing cursor, and [
$
] or [
%
] to increment or decrement the digit at
the flashing cursor. Press [ENTER] to execute the change.
RX-FREQUENCY
C-Band -
Programs the demodulator receive frequency within
3.70 to 4.20 GHz.
Ku-Band -
Programs the demodulator receive frequency within
10.95 to 11.45 GHz
11.2 to 11.7 GHz.
11.7 to 12.25 GHz.
12.25 to 12.75 GHz
Note: In 100 Hz steps.
Upon entry, the current receive frequency is displayed with the
flashing cursor on the first character. Press [
"
] or [
#
] to move the
flashing cursor, and [
$
] or [
%
] to increment or decrement the digit at
the flashing cursor. Press [ENTER] to execute the change.
DESCRAMBLER
Programs the descrambler on or off.
Upon entry, the status of the descrambler is displayed. Press [
$
] or [
%
]
to make the selection. Press [ENTER] to execute the change.
DIFF. DECODER
Programs the differential decoder on or off.
Upon entry, the status of the differential decoder is displayed. Press
[
$
] or [
%
] to make the selection. Press [ENTER] to execute the
change.