Datum Systems PSM-500 - Page 83

PSM-500/500L/500LT SCPC Satellite Modem Operation
PSM-500/500L/500LT - Rev. 0.91
Page 3-23
Demodulator Parameter Detail
Representation
Type
Entry
Description
LNB Power
+18V
Selection 0 = Disabled
1 = +13VDC
2 = +18VDC
Selects Power and Voltage to
an LNB in the 500L or LT
LNB Current Out
221mA
Numeric Read Only Displays Current draw of LNB
LNB Current Max
300mA
Numeric 0 to 500 mA Sets the maximum LNB
current before an alarm.
LNB Current Min
150mA A
Numeric 0 to 500 mA Sets the minimum LNB
current before an alarm.
LNB 10 MHz Ref
Disabled
Selection 0 = Disabled
1 = Enable
Selects if modem’s current 10
MHz reference to be supplied
to an LNB in or L
LNB LO Frequency
5150.000000MHz
Numeric 0 to 49999.999996 MHz
Selects LNB LO frequency in
or L. If set non-zero then IF
frequency setting is at RF
frequency.
Alarm CXR Lock
To Alarm A
Selection 0=None, 1=A, 2=B, 3=A&B,
4 = Mute Mod CXR,
5 = Mute & Alarm A,
6 = Mute & Alarm B,
7 = Mute & Alarm A & B
Selects destination of alarm
Alarm Data
To Alarm A
Selection 0=None, 1=A, 2=B,
3=A & B
Selects destination of alarm
Alarm Low Eb/No
To Alarm A
Selection 0=None, 1=A, 2=B,
3=A & B
Selects destination of alarm
Alarm Low Level
To Alarm A
Selection 0=None, 1=A, 2=B,
3=A & B
Selects destination of alarm
Alarm Tst Active
To Alarm A
Selection 0=None, 1=A, 2=B,
3=A & B
Selects destination of alarm
Alarm Hardware
To Alarm A & B
Selection 0=None, 1=A, 2=B,
3=A & B
Selects destination of alarm
»Alarm Backward
To Alarm A & B
Selection 0=None, 1=A, 2=B,
3=A & B
Selects destination of alarm –
Only available with mux.
»Alarm LNB Power
To Alarm A & B
Selection 0=None, 1=A, 2=B,
3=A & B
Selects destination of alarm –
Only shown in /L.
Test IF Loopbck
Disabled
Selection 0 = Disable, 1 = Enable IF Loop-back control.
Test Symbol Rate
256.000ksps
Read Only N/A Receive Symbol Rate
Test Clock Error
251
Read Only N/A Bit Rate Clock error
Test AGC
-1.9V
Read Only N/A Internal Loop Voltage