SDM-309B Satellite Modem
Operation
MN/U-SDM309B Rev. #
3–27
3.2.2.1 MOD Configuration
TXA
Transmitter rate selection. Select one of four predefined
transmitter coder/data rate combinations or a variable rate
selection.
On entry the current transmitter rate is displayed with the flashing
cursor on the first character of the code rate on line one. The data
rate is displayed on line two. Use the arrow keys to select one of
four predefined rates. Filters that are not present may display as
“N/A” (not assigned) and can not be programmed. If your modem
is equipped with the variable rate option you can also select TXV
and enter the desired data rate.
TX_Freq
Programs the modulator transmit frequency between 50 and 90
MHz or 110 and 180 MHz in 2.5 KHz Steps.
On entry the current transmitter frequency is displayed with the
flashing cursor on the first character. Use the right and left arrow
keys to move the flashing cursor and the up and down arrow keys
to increment or decrement the digit at the flashing cursor. Press
the “ENTER” key to execute the change.
To change the rate using the variable rate selection, press the
“ENTER” key when “TXV is displayed. A flashing cursor will be
displayed on the first character of the coding type on line one. Use
the right and left arrow keys to move the flashing cursor and the up
and down arrow keys to increment or decrement the digit at the
flashing cursor. Press the “ENTER” key to execute the change.
Note:
The transmitter frequency is programmable within the
specified range (50 - 90 MHz or 110 - 180 MHz) in 2.5 KHz Steps.
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 “RF_OUT” function.
RF_Out
Programs the modulator output to On or Off.
On entry the current status of the output is displayed with the
flashing cursor on the first character. Use the arrow keys to select
ON or OFF. Press the “ENTER” key to execute the change.
TX_Power
Programs the modulator output power level from -5 dB to -30 dBm
in 0.5 dB Steps.
On entry the current transmitter power level is displayed with the
flashing cursor on the first character. The up and own keys are
used to increase or decrease the output power level in 0.5 dBm
Steps. Press the “ENTER” key to execute the change.
Note:
If your modem has the high power Mod option installed (-11
modulator), you must change the output power range on the front
panel. Enter the Utility menu and find Pow Adj. Press the “ENTER”
key and adjust the maximum output power to read +5.0 dB using
the up arrow. This will make the TX power read +5.0 to -20.0 dB,
the output range of a high power mod.
DifEncdr
Programs the differential encoder On or Off.
On entry the current status of the DifEncdr is displayed with the
flashing cursor on the first character. Use the arrow keys to select
ON or OFF. Press the “ENTER” key to execute the change.
Summary of Contents for SDM-309B
Page 7: ...Preface SDM 309B Satellite Modem iv Rev 0 This page is intentionally blank ...
Page 13: ...Table of Contents SDM 309B Satellite Modem x Rev 0 This page is intentionally blank ...
Page 16: ...SDM 309B Satellite Modem Introduction MN U SDM309B Rev 1 1 3 Figure 1 1 SDM 309B Modem ...
Page 18: ...SDM 309B Satellite Modem Introduction MN U SDM309B Rev 1 1 5 Figure 1 3 Modular Construction ...
Page 25: ...Introduction SDM 309B Satellite Modem 1 1 12 MN U SDM309B Rev ...
Page 28: ...SDM 309B Satellite Modem Installation MN U SDM309B Rev 2 2 3 Figure 2 1 Rear Panel View ...
Page 34: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 3 Figure 3 1 Front Panel View ...
Page 47: ...Operation SDM 309B Satellite Modem 3 16 MN U SDM309B Rev Figure 3 2 Menu Tree ...
Page 48: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 17 Figure 3 3 Menu Tree ...
Page 49: ...Operation SDM 309B Satellite Modem 3 18 MN U SDM309B Rev Figure 3 4 Menu Tree ...
Page 50: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 19 Figure 3 5 Menu Tree ...
Page 51: ...Operation SDM 309B Satellite Modem 3 20 MN U SDM309B Rev Figure 3 6 Menu Tree ...
Page 52: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 21 Figure 3 7 Menu Tree ...
Page 53: ...Operation SDM 309B Satellite Modem 3 22 MN U SDM309B Rev Figure 3 8 IF Loopback ...
Page 54: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 23 Figure 3 9 RF Loopback ...
Page 55: ...Operation SDM 309B Satellite Modem 3 24 MN U SDM309B Rev Figure 3 10 Interface Loopback ...
Page 56: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 25 Figure 3 11 Baseband Loopback ...
Page 71: ...Operation SDM 309B Satellite Modem 3 40 MN U SDM309B Rev Figure 3 12 Menu Tree ...
Page 72: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 41 Figure 3 13 Menu Tree ...
Page 73: ...Operation SDM 309B Satellite Modem 3 42 MN U SDM309B Rev Figure 3 14 Menu Tree ...
Page 74: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 43 Figure 3 15 Menu Tree ...
Page 75: ...Operation SDM 309B Satellite Modem 3 44 MN U SDM309B Rev Figure 3 16 Menu Tree ...
Page 76: ...SDM 309B Satellite Modem Operation MN U SDM309B Rev 3 45 Figure 3 17 Menu Tree ...
Page 77: ...Operation SDM 309B Satellite Modem 3 46 MN U SDM309B Rev ...
Page 88: ...SDM 309B Satellite Modem M C and Interfaces MN U SDM309B Rev 4 4 11 Figure 4 4 IBS Fault Tree ...
Page 89: ...M C and Interfaces SDM 309B Satellite Modem 4 4 12 MN U SDM309B Rev Figure 4 5 Jumper Table ...
Page 127: ...SDM 309B Satellite Modem Theory of Operation MN U SDM309B Rev 5 5 3 Figure 5 1 Modulator Card ...
Page 151: ...Maintenance SDM 309B Satellite Modem 6 6 6 MN U SDM309B Rev Figure 6 3 Typical Eye Patterns ...
Page 177: ...SDM 309B Satellite Modem Data Rates and Filters MN U SDM309B Rev A 9 ...
Page 235: ...External Channel Unit SDM 309B Satellite Modem C C 28 MN U SDM309B Rev Figure C 13 Menu Tree ...
Page 236: ...SDM 309B Satellite Modem External Channel Unit MN U SDM309B Rev C C 29 Figure C 14 Menu Tree ...
Page 237: ...External Channel Unit SDM 309B Satellite Modem C C 30 MN U SDM309B Rev Figure C 15 Menu Tree ...
Page 238: ...SDM 309B Satellite Modem External Channel Unit MN U SDM309B Rev C C 31 ...
