Specifications

SDM-650B Satellite Modem Configuration
Rev. 5 3–5
3.1.1.5 Modulator/Coder Defaults
TXA Transmit Filter A — 7/8 code rate, 56 kbit/s
TXB Transmit Filter B — 3/4 code rate, 56 kbit/s
TXC Transmit Filter C — 1/2 code rate, 56 kbit/s
TXD Transmit Filter D — 1/2 code rate, 64 kbit/s
TXR Transmit Rate Selected — A 7/8, 56 kbit/s
TX-FREQ Transmitter Frequency — 70 MHz
RF-OUT RF Output — OFF
TX-POWER Transmit Power Level — -10 dBm
RFLOOPBK RF Loopback — OFF
IFLOOPBK IF Loopback — OFF
BBLOOPBK Baseband Loopback — OFF
SCRAMBLR Scrambler — ON
DIFENCDR Differential Encoder — ON
TX-CLOCK Transmit Clock — Internal
SWP-RACQ Sweep Re-acquisition — 0 Sec
SWP-CNTR Sweep Center — Hz (See Note Below)
SWP-RNGE Sweep Range — 5000 Hz (See Note Below)
SWP-DIR Sweep Direction — Forward (See Note Below)
CW-MODE Continuous Wave Mode — OFF
Note: These windows will only be displayed when FAST-ACQ (Fast Acquisition)
has been turned ON in the Utility menu.
3.1.1.6 Demodulator/Decoder Defaults
RXA Receive Filter A — 7/8 decode rate, 56 kbit/s
RXB Receive Filter B — 3/4 decode rate, 56 kbit/s
RXC Receive Filter C — 1/2 decode rate, 56 kbit/s
RXD Receive Filter D — 1/2 decode rate, 64 kbit/s
RXR Receive Rate Selected — A 7/8, 56 kbit/s
RX-FREQ Receiver Frequency — 70 MHz
RFLOOPBK RF Loopback — OFF
BBLOOPBK Base Band Loopback — OFF
DSCRMBLR Descrambler — ON
RX-CLOCK Receive Clock — Normal
BERTHSLD BER Threshold [None]
3.1.1.7 Utility Defaults
DATE 7/4/76
TIME 12:00 AM
POW-ADJ -5 dB
OP-MODE Duplex
FAST-ACQ OFF