Jp6: Input Level Attenuation; Jp7: Audio Frequency Response; Jp8: Subaudible Tone Source; Jp16: Direct Digital Input (Rev 4 Or Higher) - RF Technology Eclipse Series Operation And Maintenance Manual

2.5 JP6: Input Level Attenuation

2.5 J P6: Input Level Attenuation
This jumper permits coarse input sensitivity to be set. In the default position, the unit expects
a line level of 0dBm (nominal) at its Line Input.
+20dBm(nominal) can be accepted.
Condition
0dB attenuation
20dB attenuation
2.6 J P7: Audio Fr equency Response
Condition
750 uSec. Pre-emphasis
Flat Response
2.7 J P8: Sub-audible Tone Source
Condition
Internal CTCSS
External input
2.8 J P9/10/11: dc Loop Configur ation
Dc loop current on the audio pair is normally sourced externally. The Eclipse exciters loop
the current through an opto-isolator. When the current flows the exciter keys up.
An alternative arrangement is possible. The exciters can source the current and an external
device can provide the dc loop.
These three jumpers select the appropriate mode.
Condition
Current Loop Input
12Vdc Loop source
2.9 J P16: Dir ect Digital Input (Rev 4 or Higher )
Some trunking controllers have digital encoding schemes which operate to very low
frequencies. The elliptical filter, used as a 250Hz low pass filter in the tone section, can
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RF Technology T800
Position
1-2 *
2-3
Position
1-2 *
2-3
Position
1-2, 4-5 *
2-3, 5-6
J P9 J P10
ON OFF
OFF ON
2 TRANSMITTER JUMPER OPTIONS
In the alternate position, levels of
J P11
OFF *
ON
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