Axcera INNOVATOR, Инструкция по эксплуатации

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UHF Analog Driver/Transmitter/ Chapter 2, System Description,
Translator Maintenance & Remote Control Connections
LX Series, Rev. 3 2-8
resulting signal is amplified and applied
to a Pin diode attenuator before it is
connected to the output of the
upconverter. This pin diode attenuator
adjusts the gain of the module and is controlled by an Automatic Gain Control
circuit, which maintains a constant
power out of the upconverter, and also
the transmitter, that connects to the
power amplifier module.
Table 2-14. VHF/UHF Upconverter Front Panel Switch
SWITCH FUNCTION
MAN/AUTO AGC
(Left Manual, Right AGC)
When Manual AGC is selected, the reference AGC voltage is
set by the AGC Manual Gain front panel potentiometer.
When Auto AGC is selected, the RF power level control circuit
will automatically increase the RF output until the desired
output power is attained.
Table 2-15. VHF/UHF Upconverter Front Panel Status Indicators
LED FUNCTION
PLL 1 Fault
(Red)
When lit it indicates that the 1 GHz PLL is unlocked
PLL 2 Fault
(Red)
When lit it indicates that the 1.1 –1.9 GHz PLL is unlocked
AGC Fault
(Red)
When lit it indicates that the AGC is out of range.
AGC Override
(Red)
When lit it indicates that the AGC is cutting back due to too much
drive to the driver module.
Man Gain
(Amber)
When lit it indicates that the AGC is bypassed in Manual.
Table 2-16. VHF/UHF Upconverter Front Panel Control Adjustments
POTENTIOMETERS DESCRIPTION
MAN GAIN ADJ
Adjusts the gain of the upconverter and transmitter when in the
Manual AGC position.
AGC ADJ
Adjusts the gain of the upconverter and transmitter when in the
Auto AGC position.
AGC CUTBACK ADJ
(AGC OVERRIDE)
Adjusts the point at which the transmitter will cut back in power,
due to too much drive, when the Transmitter is in Auto AGC.
Table 2-17. VHF/UHF Upconverter Front Panel Samples
SMA CONNECTOR DESCRIPTION
LO1 SAMPLE
Sample of the 1 GHz nominal LO1 signal in the Upconverter as
generated on the L-Band PLL Board.
LO2 SAMPLE
Sample of the 1.1-1.9 GHz LO2 signal in the Upconverter as
generated on the First Conversion Board.
RF SAMPLE Sample of the On Channel RF Output of the Upconverter