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SLM-5650 Satellite Modem Revision 2
Front Panel Operation MN/SLM5650.IOM
4–18
4.3.1.5 Select: CONFIG: Ref
Select Internal, Ext-1Mhz, Ext-5Mhz or Ext-1Mhz, then press [E].
Internal
Permits the user to select :
Internal high stability ovenized 10 MHz oscillator
Ext-1MHz
Permits the user to select:
An external 1 MHz reference, (accepts sine wave or square wave and
locks the internal reference to the 1 MHz)
Ext-5MHz
Permits the user to select:
An external 5 MHz reference, (accepts sine wave or squarewave and
locks the internal reference to the 5 MHz)
Ext-10MHz
Permits the user to select:
An external 10 MHz reference, (accepts sinewave or squarewave and
locks the internal reference to the 10 MHz)
4.3.1.6 Select: CONFIG: Mask
TxData
Permits the user to select : Masked, Activity, or AIS,
(this alarm monitors data activity on the transmit data
interface).
RxData
Permits the user to select : Masked, Activity, or AIS,
(this alarm monitors the received data activity).
Eb/No Threshold
Permits the user to select : Masked or Active, (this alarm
monitors the receive Eb/No of the demodulator and
compares it to the Eb/No threshold value).
IMPORTANT
When selecting masked for a given alarm, if the condition occurs the
alarm will not be set. Activity or active means the alarm is enabled.
AIS stands for alarm indication signaling. This will put out all ones
allowing the connected equipment to recognize that there is an alarm
condition.
Reference: Internal Ext-1Mhz
Ext-5Mhz Ext-10Mhz (efE)
Mask: TxData RxData Eb/No Threshold
(efE)