SDI LNFR-100E Bedienungsanleitung PDF herunterladen (Seite 14)

SpectraDynamics, Inc. ● 1849 Cherry Street Unit 2, Louisville CO, 80027 ● Phone (303) 665 1852 ● Fax (303) 604 6088

www.spectradynamics.com

AUTOSWITCH AMPLIFIER, HPDA-15RMi-S

DESCRIPTION

The HPDA-15RMi-S is a high performance frequency distribution amplifier with an autoswitch function that

allows the selection of the RF input to be distributed. The selected RF input supplies 10 buffered unity gain

outputs. The instrument has a manual mode and autoswitch mode of operation. In manual mode, the RF input

can be selected with a toggle switch on the front panel, or by sending a command through the Ethernet

interface. In autoswitch mode the two RF input levels are monitored and compared to a set threshold of +7

dBm. Upon failure of a selected input channel the amplifier switches over to the alternate RF input with a

switching time less than 1 us.

The selected RF input is buffered and distributed to ten unity gain outputs. The typical cross-channel isolation of

the RF distribution is 140 dB and reverse isolation is typically greater than 145 dB. The phase noise of the

amplifier is exceptionally low, typically –147 dBc/Hz @ Fourier frequency of 1 Hz and –171 dBc/Hz @ Fourier

frequencies greater than 10 kHz. Both the input and output are matched to 50 ohms to obtain better than 25 dB

return loss. All outputs are AC coupled and the grounds are DC isolated to reduce the effect of ground loops.

The HPDA-15RMi-S is designed to be powered by a 100 to 240 VAC mains source or by a +12 to +36 VDC

power source. The DC power supply may be used as a main power source for the instrument or in conjunction

with the AC power supply as a backup in case of loss of the main AC power. The instrument is designed to

automatically switch from AC to DC supply operation using a Schottky diode network and charge storage

capacitors to avoid any glitches and ensure uninterrupted continuous operation.

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SDI LNFR-100E Bedienungsanleitung Seite 14