Comtech EF Data KST-2000A, Installation And Operation Manual

Page: 92 / 182

Ku-Band Satellite Transceiver Revision 9
Operation MN/KST2000AB.IOM
5–8
U/C ATTN Programs the up converter output power attenuation from 0 to 25 dB, in 1.0
dB steps.
On entry, the current up converter attenuation is displayed with a flashing
cursor. Press [
S
] or [
T
] to increase or decrease the output power
attenuation in 1.0 dB steps. Press [ENTER] to execute the change.
D/C ATTN Programs the down converter input power attenuation from 0 to 20 dB, in 1.0
dB steps.
On entry, the current down converter attenuation is displayed with a flashing
cursor. Press [
S
] or [
T
] to increase or decrease the input power attenuation
in 1.0 dB steps. Press [ENTER] to execute the change.
LNA PWR Programs the setting that provides power to the LNA or LNB.
Options are "OFF" or "ON". “ON” means LNA power will be available on the
center conductor of the coax cable (J4). “OFF” means DC power will be
removed from the coax cable. LNA voltage typical: 15 VDC, 20% tolerance.
LNA FLT Programs the LNA fault enable parameter.
“ON” means the system will declare an LNA fault when applicable.
“OFF” means all LNA faults will be ignored by the system.
CALIB. Calibrates the LNA power consumption.
Enables the user to calibrate the unit to determine the normal LNA or LNB
power consumption. This only needs to be performed once during the initial
installation. If [ENTER] is pressed, the M&C will perform an analog-to-digital
conversion of the LNA current, and store the value in the Electrically-Erasable
Programmable Read-Only Memory (EEPROM). During the normal operation,
the M&C will monitor the LNA current, and compare it to the stored value. If
the LNA deviates by
±
30%, a fault will be declared.
REF ADJ Allows adjustment of the 10.000 MHz reference frequency to compensate for
long-term drift. The setting varies from 1 to 255.
XFLT EN Enables or disables the external fault input.
When ON is selected, all of the HPA, SSPA, and TWTA faults work normally.
When OFF is selected, the HPA, SSPA, and TWTA faults will be masked and
not reported via the display or remote control.
AGC EN Automatic Gain Control enable or disable.
When ON is selected, the AGC function maintains the system gain, as
measured from the TX IF input to the Ku-Band output of the Comtech
supplied SSPA, at the user's preset value despite the effects of aging,
operating temperature, or cabling loss. If "OFF" is selected, system gain will
not be monitored or controlled. Note: also when AGC is programmed to the
"OFF" mode, the up converter attenuation will not display a decimal point as a
courtesy indication that the AGC function is off.
HPA PWR HPA power enable or disable.
On entry, the currently selected parameter will appear. Press an Arrow key to
select ON or OFF. Press [ENTER] to execute the change. When ON is
selected, the DC voltage is supplied to the HPA. Note: This command is for
Comtech EF Data SSPAs only. Selecting "OFF" removes power from the
SSPA.
LOCKMODE Locks the keypad/display to prevent the changing of data.
Options are LOCKED and DISABLED. When "DISABLED" is selected, the
keypad/display will operate normally. If "LOCKED" is selected, the [Enter] key
is disabled a brief message is displayed indicating the keypad is in lock mode.
Selecting LOCKMODE "DISABLED" will restore the keypad/display to its
normal operating mode.