User's Manual
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Make the connec ons between the mobile radio and the WB-1000 cable as follows:
Pin 1: Ground. Connect to the radio’s chassis or ground plane.
Pin 2: Mobile transmit audio. Connect to the mobile transmit audio path or tone input. If connected to
the mobile mic input, ensure that the WB-1000 is programmed for fl at (common data). If connected
a er pre-emphasis, ensure that the WB-1000transmit audio path is programmed for pre-emphasis.
Pin 2 is AC coupled and has an output impedance of 600 or 2.2Kohms (determined by J2). RV3 sets
the transmit audio output level and J1 sets the adjustment range between 0-5VPP (J1 open) or 0-
100mVPP (J1 shorted).
Pin 3: Remote enable/disable. Connect to the radio’s auxiliary output or a separate switch to remotely
enable or disable the repeater. If this line goes high to ac vate the repeater, ensure that JP1 is set
to the “+” posi on. If this line goes to ground, set JP1 to the “-” posi on. J8 has two posi ons to
add a pull up (+) or pull down (-) resistor to this line if used with an open collector or dry contact
output.
Pin 4: Mobile PTT output. Connect to mic PTT on the mobile radio, or a line that goes ac ve low to trans
mit. Pin 4 is an open drain output rated at 2A at 15VDC.
Pin 5: 12 VDC input. Connect to the radios 12V switched supply or a point capable of supplying at least
2A of current.
Pin 6: Mobile receive audio. Connect this line to the mobile receive audio path before the volume control.
If pin 6 is connected to the mobile discrimminator, ensure that the SVR-P250 receive path is
programmed for de-emphasis (common data). If connected a er de-emphasis, program the receive
path for fl at. Pin 6 is AC coupled and high impedance (>15K ohm). RV5 sets the receive audio level
sensi vity; this input should be between 30mVPP and 5VPP. J7 sets the gain of the receive input
amp. If open, the input has a maximum gain of one; if installed, the input has a maximum gain of