Lna current source, Lna current calibration and current window, Lna fault logic – Comtech EF Data CSAT-6070 User Manual

Page 71: 13 lna c, 14 lna c, 15 lna f

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5 to 25 Watt C-Band Transceiver

Revision 0

System Operation

MN/XSAT607025.IOM

If ‘Auto Fault Recovery’ is ON and the same situation occurs, the CSAT will
automatically be unmuted and return to normal operating mode. To protect
against repetitive, momentary faults, if the CSAT experiences five occurrences of
the same fault, the ‘Auto Fault Recovery’ parameter will automatically be set to
OFF.

Example: If the Up Converter IFLO synthesizer goes unlocked and starts sweeping while Auto
Fault Recovery is ON, the CSAT would see a unlocked / locked condition at the sweep rate of the
IFLO synthesizer. After the 5th occurrence the firmware will set Auto Fault Recovery to OFF and
keep the CSAT RF output muted.


Associated Remote Command(s):

AFR=

Example(s) AFR=1

3.3.13 LNA C

URRENT

S

OURCE

The CSAT has the circuitry necessary to source current, at 11 Vdc, up the “RF IN” port
J2, to power a LNA. This current source can be turned ON/OFF via the user. This source
is capable of providing up to 400 mA.

WARNING

Never turn the unit ON without proper termination on the J7 “RF OUTPUT” port.
Individuals can be exposed to dangerously high electromagnetic levels.

IMPORTANT

Exercise care when directly connecting the CSAT to Laboratory Test Equipment.
A DC block should be used between the J2 “RF IN”’ port and RF test source to
protect the test equipment in case the source is accidentally turned ON. (The
factory default is OFF).


Associated Remote Command(s):

LCS=

Example(s) LCS=1

3.3.14 LNA C

URRENT

C

ALIBRATION AND

C

URRENT

W

INDOW

The CSAT provides the capability to monitor the LNA current when configured to supply
current to a LNA. In addition, an adjustable window detect for the LNA current is
provided. After attaching the LNA and turning on the current source, the user can
‘Calibrate’ the current and set a window from

±20% to ±50% to trigger an alarm. The

user can disable the ‘window detect’ feature by setting the window value to

±99%. (The

factory default is 99)

Associated Remote Command(s):

CAL= , LCW=

Example(s)

CAL= , LCW=40


3.3.15 LNA F

AULT

L

OGIC

The CSAT allows the user to select whether or not the summary fault relay is activated if
the LNA current moves out the prescribed window. This allows the user to control

3–7

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