SDM-309B Satellite Modem
Operation
MN/U-SDM309B Rev. #
3–7
SWP-RACQ
Programs the sweep reacquisition mode time duration. The time
selected with this parameter is the time that the modem will remain in
a narrow sweep (± 10%) after acquisition has been accomplished.
After this timer runs out the modem will return to the normal sweep.
On entry the current programmed setting is displayed with a 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 and decrement the digit at the flashing cursor. Select the
number of seconds for the reacquisition mode from 0 to 999
seconds. Press the “ENTER” key to execute the change.
**SWP_CNTR
Programs the sweep center frequency for the directed sweep
function. The sweep center frequency may be set in the range from
+25000Hz to -25000Hz.
On entry the current programmed setting is displayed with a 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 and decrement the digit at the flashing cursor. Select the
sweepcenter frequency from -25000Hz to +25000Hz. Press the
“ENTER” key to execute the change.
When in directed sweep, the value from the sweep monitor screen
(when the modem was last locked) should be entered for the sweep
center frequency.
**SWP_RNGE
Programs the overall travel of the sweep width range during
acquisition in the directed sweep mode. The sweep width may be set
from 0 Hz to 50000 Hz. (When set at 50000 Hz, the modem is in the
fast acquisition mode).
On entry the current programmed setting is displayed with a 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 and decrement the digit at the flashing cursor. Select a
sweep range from 0 Hz to 50000 Hz. Press the “ENTER” key to
execute the change.
When in directed sweep, the smaller the range is, the faster the
modem will lock, provided the sweep center frequency is close.
**SWP_DIR
Programs the direction of the sweep travel in the directed sweep
mode.
On entry the current programmed setting is displayed with the
flashing cursor on the first character. Use the arrow keys to select
Forward (+) or Reverse (-). Press the “ENTER” key to execute the
change.
BERT_set
This function is used to set the BER threshold.
If the BER threshold set is exceeded a receive fault will be indicated
by the modem status indicators. BER threshold may be set from 1E-
3 to 1E-8 or may be disabled by specifying NONE.
On entry the current setting of the BER threshold is dis played. Use
the up and down arrow keys to select the desired setting. Press the
“ENTER” key to execute the change.
* Indicates Test Mode configuration option.
**These windows only show up when the Fast Acquisition has been
turned on in the “Utility” menu.
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 ...
