Comtech EF Data CDM-550T Manual page 61

CDM-550T Satellite Modem
6.2.5.3 (INFO) RX (Receive information)
6.2.5.4 (INFO) BUFF (Buffer information)
6.2.5.5 (INFO) EDMAC (Framing and EDMAC information)
Rev. 1.3
Rx: 70.0000
B R3/4 D BUFF +/-23k I
The information displayed here is as follows:
Top line:
Receive Frequency
Receive Data Rate
FEC Decoder type (VIT = Viterbi, SEQ = Sequential, VRS=Viterbi + Reed-
Solomon, SRS=Sequential + Reed Solomon, TUR = Turbo, UNC = uncoded)
Bottom line:
Demodulation type (Q = QPSK, O= OQPSK, B = BPSK)
Code Rate (shows blank in uncoded mode)
Descrambler state (D = Descrambler on, N = off)
Clocking Mode
Demod Sweep Acquisition range
RSI state (I = Receive Spectral Inversion on, N = off)
BUFFER: ENABLED (TX=RX)
SIZE: +/-4096 BITS
This displays if the buffer is enabled or disabled, shows the exact clocking mode
(TX=RX, or TX<> RX), and the buffer size. Pressing ENTER takes the user
back to the previous menu.
FRAMING: ON
EDMAC MODE: ON
This screen shows the framing mode, EDMAC mode, and shows if the unit is an
EDMAC MASTER or SLAVE. Pressing ENTER takes the user back to the
previous menu.
512.000 SEQ
(SLAVE)
Front Panel Operation
6–31