External Channel Unit
SDM-309B Satellite Modem
C-C–24
MN/U-SDM309B Rev. #
TX_Clock
Programs the modem for internal or external transmitter clock.
On entry, the current status of the Transmit Clock is displayed with the
flashing cursor on the first character. Use the arrow keys to select
“Internal” or “External” transmit clock. Press the “Enter” key to execute
the change.
RX_Clock
Programs the modem for inverted or normal receive clock.
On entry, the current status of the Receive Clock is displayed with the
flashing cursor on the first character. Use the arrow keys to select
“Inverted” or “Normal” receive clock. Press the “Enter” key to execute
the change.
Swp_Racq
Programs the sweep reacquisition time from 0 to 999 seconds.
On entry, the current status of the sweep reacquisition is displayed with
the flashing cursor on the first character. Use the arrow keys to
increment or decrement the digit at the flashing cursor. Press the
“Enter” key to execute the change.
CW_Mode
*Programs the modem for continuous wave mode.
Three modes of operation are available: center, dual, and offset
modes.
On entry, the “CENTER” mode is displayed. To activate this test mode
press the “ENTER” key. Use the arrow keys to select the “DUAL or the
“OFFSET” modes. To return to the “CONFIG” menu press the “CLEAR”
key.
Note:
When the “CLEAR” key is pressed, the modem is configured to
the state it was in before “CWMode” was invoked and the transmitter is
automatically turned off to prevent the possible swamping of other
channels. To turn the transmitter on, use the “RF_OUT” function.
Center Mode:
Generates carrier at the current modulator frequency. This can be used
to measure the output power and output frequency.
Dual Mode:
Generates a dual side-band suppressed carrier signal. Side-bands are
at one half (1/2) the symbol rate from the carrier. This is used to check
the channel balance and carrier null.
Offset Mode:
Generates a single upper side-band suppressed carrier signal. The
upper side-band is at one quarter (1/4) the symbol rate from the carrier.
This is used to check the quadrature.
* Indicates Test Mode configuration option.
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 ...
