Comtech EF Data SLM-5650A - Manual (Page 94)

SLM-5650A Satellite Modem Revision 8
Front Panel Operation MN-SLM5650A
5–12
CONFIG: Tx  Power
Tx Power: State:On Level:-20.0
Control: Normal (E)
First, use the arrow keys to select State, Level, or Control, and then press [ENT]. Then:
Option Setting
State Use the  arrow keys to select On or Off. Press [ENT] when done.
Level To edit the Power Level from –40 dBm to +10 dBm in 0.1 dB steps:
1. Key in the desired number using the keypad –or–
2. Select the digit to be edited using thearrow keys, and then change the value of that
digit by using the  arrow keys.
3. Press [ENT] when done.
Control Use the  arrow keys to select Normal, RTS, or VSAT. Press [ENT] when done. Note the
following:
• RTS (Request to Send) is an interface signaling control. If enabled, RTS can be used to
control the output state of the modulator. Only available when using either the EIA-530 or
HSSI interface.
• When VSAT is selected, the output state of the modulator is controlled by the demodulator
carrier detect status. Modulator output will be enabled when the demodulator is detected,
and disabled otherwise.
CONFIG: Tx  Clocking
Tx Clocking: CLK Source: SCT (E)
SCT Ref: Reference
First, use the  arrow keys to select Clk Source or SCT Ref, and then press [ENT]. Then:
Option Setting
Clk Source Use the  arrow keys to select SCT or Tx-Terr. Press [ENT] when done. Note the following:
• SCT (Send Clock Timing) – Selected as an output to provide a clock reference for the user.
• Tx-Terr – Provides transmit clock input on the selected data interface.
SCT Ref Use the  arrow keys to select Reference, DataSrcSync, or LoopTiming. Press [ENT]
when done. Note the following:
• Reference – SCT will be generated from the modem’s 10 MHz reference (this could be
derived from and external reference if selected).
• DataSRCSync (Data Source Synchronization) – No clock is provided on the interface and a
clock is generated such that it is phase locked to the incoming data stream.
• LoopTiming – The clock generated from the received carrier is used as a reference for
generating SCT.