Radyne DMD20 Installation And Operation Manual page 71

User Interfaces
STRAP CODE
IF (menu)
FREQUENCY (MHz)
DWNLNK FREQ (MHz)
SPECTRUM
MODULATION
SPECTRAL MASK
SWEEP RANGE (kHz)
SWEEP DELAY (Sec)
4-12
DMD20/DMD20 LBST Universal Satellite Modem
{Refer to Strap Code Guide, Section 4.3, Table 4-4}
The Strap Code is a quick set key that sets many
modem parameters. Consult the strap code guide for
available strap codes. Parameters set by strap code:
Data Rate
Inner Code Rate
Satellite Framing
Scrambler
Drop and Insert
Outer Code Rate (Reed-Solomon)
Modulation
Network Spec
{50 – 90 MHz, 100 – 180 MHz, or 950 - 2050 MHz}
(50 – 90 MHz, 100 – 180 MHz, or 950 - 1750 MHz}
for AS/5100 before Rev. C
{950 – 2050 MHz} for LBST
Allows the user to enter the Modulator IF Frequency in 1
Hz increments.
Displays the input frequency into the LNB from the
satellite, also referred known as Satellite downlink
frequency. The user must enter the LNB LO and OSC
SIDEBAND of the LNB before using this menu. The
DOWNLINK FREQUENCY is a calculated measurement
of both the LNB LO and OSC SIDE BAND. Once the
menus are entered correctly, the user can control the
downlink Frequency from this menu.
{NORMAL INVERTED}
Allows the user to invert the direction of rotation for PSK
Modulation. Normal meets the IESS Specification.
LBST: Spectral inversion may be required if the LNB LO
is higher in frequency than the LNB input frequency from
the satellite. When LNB LO is higher in frequency than
the LNB input frequency, this creates a spectral
inversion and the IF Spectrum must be inverted to
compensate for the inversion.
{QPSK, BPSK, OQPSK, 8PSK, 16QAM}
Allows the user to select the demodulation type.
{Intelsat 0.35, DVB 0.35, DVB 0.25}
Allows the user to set the spectral shape of Tx Data
Filter.
{±0 to 255 kHz}
Allows the user to set the acquisition range for the
demodulator
{0.0 – 900.0 sec}
TM103 - Rev. 2.5