Operating instructions

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RF Technology R800 Page 6
2 RECEIVER JUMPER OPTIONS 2.1 JP1 -240Hz Notch Filter
Flashing 1 time, pause dc supply voltage low or high
LED ON continuously External squelch is active
2 Receiver Internal Jumper Options
In the following subsections an asterisk (*) signifies the standard (Ex Factory) configuration
of a jumper.
2.1 JP1 - 240 Hz Notch Filter
Condition Position
Notch filter In 1-2*
Notch Filter Out 2-3
2.2 JP2 Audio Response
Condition Position
750µSec de-emphasis 1-2*
Flat response 2-3
2.3 JP3 Audio Filter In/Out
Condition Position
Hi-pass & Notch In 2-3*
Flat response to 3 KHz 1-2
2.4 JP4 600 Ohm Line dc Loop COS
Condition Position
dc Loop Configured by JP7, JP8, JP9 1-2*
dc Loop Not connected 2-3
2.5 JP6 COS Polarity
Condition Position
Active on Signal 1-2*
Active on No Signal 2-3
2.6 JP7, JP8, JP9 - dc Loop COS Configuration (JP4 1-2)
Condition JP7 JP8 JP9
Source +12 Vdc Loop 2-3 ON 2-3*
Free Switch Output 1-2 ON 1-2