Select: Config: Ref; Select: Config: Mask - Comtech EF Data SLM-5650 Installation And Operation Manual

SLM-5650 Satellite Modem
Front Panel Operation
4.3.1.5

Select: CONFIG: Ref

Reference: Internal Ext-1Mhz
Select Internal, Ext-1Mhz, Ext-5Mhz or Ext-1Mhz, then press [E].
Internal
Ext-1MHz
Ext-5MHz
Ext-10MHz
4.3.1.6

Select: CONFIG: Mask

Mask: TxData
TxData
RxData
Eb/No Threshold
IMPORTANT
Ext-5Mhz Ext-10Mhz
Permits the user to select :
Internal high stability ovenized 10 MHz oscillator
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)
Permits the user to select:
An external 5 MHz reference, (accepts sine wave or squarewave and
locks the internal reference to the 5 MHz)
Permits the user to select:
An external 10 MHz reference, (accepts sinewave or squarewave and
locks the internal reference to the 10 MHz)
RxData
Permits the user to select : Masked, Activity, or AIS,
(this alarm monitors data activity on the transmit data
interface).
Permits the user to select : Masked, Activity, or AIS,
(this alarm monitors the received data activity).
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).
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.
Eb/No Threshold
4–18
Revision 2
MN/SLM5650.IOM
( E)
( E)