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DT4572 X-Band Down Converter
System Operation
3.3.2 C
ONFIGURATION
The Configuration Functions are as follows:
3.3.2.1 F
REQUENCY
Frequency (FREQ):
Displays the current converter frequency in MHz, and allows the selection of a
new frequency channel between RF
7750.000 MHz for Model DT-4572) in 125 KHz steps through key-pad inputs.
Attenuation (ATTN):
Input and displays the converter attenuation setting which is selected between
0.00 to 20.00 in 0.25 dB steps. The default setting is 10.00 dB.
RX:
The converter is ON or OFF. The default mode is OFF.
3.3.2.2 E
XTERNAL
External Reference:
The External Reference is displayed only when the 5 or 10 MHz external
reference input to the converter is present.
3.3.2.3 E
M
NTRY
ODE
The entry mode is Local or Remote. The default is Remote.
COLD Start:
The COLD Start Mode, if enabled, mutes the converter output signal for a pre-
determined time, 15 minutes, after power is applied to the converter to ensure that
the reference oscillator is stable. The default mode is Disabled. This function is
disabled in redundant systems.
3.3.2.4 F
R
AULT
ECOVERY
Fault Recovery:
Fault Recovery is Manual or Auto. The default is Auto.
3.3.2.5 R
EDUNDANCY
Refer to Appendix A, Redundant System Operation.
3.3.3 P
-
RE
SELECT
3.3.3.1 D
P
ISPLAY
Displays the frequency and attenuation pre-selects for the converter. One (1) to thirty-
two (32) frequencies can be pre-selected. If no frequencies have been pre-selected, the
LCD display will indicate "NONE".
F
UNCTIONS
O
M
PERATING
ODE
R
EFERENCE
/COLD S
TART
M
ODE
F
M
UNCTION
ENU
-S
RE
ELECT
M
ENU
to RF
Low
High
26
MM/DT4572.IOM
MHz (e.g.; 7250.000 to
Rev. 0
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Troubleshooting
