Ref Led; Test Mic; Transmitter Internal J Umper Options; Jp2: Eprom Type - RF Technology T220 Operation And Maintenance Manual

1 OPERATING INSTRUCTIONS

1.1.7 REF LED

The REF LED indicates that the synthesizer frequency reference is locked to an external
reference.

1.1.8 TEST MIC.

The TEST MIC. DIN socket is provided for use with a standard mobile or handset 200
Ohm dynamic microphone.
MIC'S PTT is on.
2 Tr ansmitter Inter nal J umper Options
In the following subsections an asterisk (*) signifies the standard (Ex-Factory)
configuration of a jumper.
2.1 J P2: EPROM Type
Condition
27C256
27C64
2.2 J P3: Dc Loop PTT
By default, Eclipse exciters can be keyed up by pulling the PTT signal low, or by dc
loop signaling on the audio paid.
This jumper can enable, or disable this second method.
Condition
dc loop connected (enabled)
dc loop not connected (bypassed)
2.3 J P4: Audio Input Sour ce
Either the 600Ω or the high-Z balanced inputs may be selected.
Condition
600Ω Input
High-impedance Input
RF Technology T220
The external audio inputs are disabled when the TEST
Position
2-3 *
1-2
Position
1-2 *
2-3
Position
2-3 *
1-2
1.1.7 REF LED
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