Comtech EF Data C5 - Manual (Page 135)

C5/K1/K3 Integrated Satellite Terminal System Operation
Rev. 0 4–9
4.1.3.1 Configuration Modulator
Refer to Figure 4-4.
TX-x/Type/Code Rate Transmit code rate/type selection. Select one of four (A, B, C, or D)
pre-defined transmitter code/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 4370 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 transmitter rate is displayed with the flashing
cursor on the first character of the code rate on line 1. Line 2 displays
the data rate. Press [
"] or [#] to make the selection. To select the
currently defined variable data rate, select TX-V, and press [ENTER]
twice.
To change the rate using the variable rate selection, press [ENTER]
when TX-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.
Note: When the TX rate has been programmed, the transmitter is
automatically turned off to prevent swamping of other channels. To
turn the transmitter on, use the TX-IF Output function.
TX-FREQUENCY C-Band - Programs the modulators transmit frequency between
5.925 to 6.425 GHz in 100 Hz steps.
Ku-Band - Programs the modulators transmit frequency between
14.0 to 14.5 GHz in 100 Hz steps.
Upon entry, the current transmitter 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.
Note: When the transmitter frequency is changed, the transmitter is
automatically turned off to prevent the possible swamping of other
channels. To turn the transmitter on, use the TX-IF Output function.
RF OUTPUT Programs the modulator output on or off.
Upon entry, the status of the output is displayed. Press [
$] or [%] to
make the selection. Press [ENTER] to execute the change.