Radio Connection - Pyramid WM-1000 Product Manual

4.2 Radio Connection

Make the connections 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 flat (common data). If connected
after pre-emphasis, ensure that the WB-1000 transmit audio path is programmed for pre-emphasis.
The PTB audio adjustment in the CPS sets this output level to a range between 0-5VPP
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 activate the repeater, ensure that CPS pro
gramming for Remote Enable Polarity is set to High. If this line is open collector from the mobile
radio, make sure to check the 'pull up' option in the CPS for Remote Enable.
Pin 4: Mobile PTT output. Connect to mic PTT on the mobile radio, or a line that goes active low to trans
mit. Pin 4 is an open drain output rated at 2.2A at 20VDC.
Pin 5: 12 VDC input. Connect to the radios 12V switched supply or a point capable of supplying at least
500mA 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 WB-1000 receive path is
programmed for de-emphasis. If connected after de-emphasis, program the receive
path for flat. This input should be between 30mVPP and 5VPP. The BTP audio settings in the CPS
sets the gain of the receive input amp.