User manual ICOM CM-8B

[. . . ] The heatsink will become hot when operating the repeater continuously for long periods. If a linear amplifier is connected, set the repeater's RF output power to less than the linear amplifier's maximum input level, otherwise, the linear amplifier will be damaged. Other manufacturer's microphones have different pin assignments, and connection to the CM-8B may damage the repeater. R NEVER apply AC to the [BATTERY] terminals on the repeater rear panel. This could cause a fire or damage the repeater. R NEVER apply more than 16 V DC, such as a 24 V battery, to the [BATTERY] terminals on the repeater rear panel. [. . . ] Input impedance: 600 4 5 6 7 8 +EXTMOD ­BUSY +BUSY Output terminal for squelch condition Open collector=BUSY OFF (Open/Close). An opto-isolator is provided to fa0 V=BUSY ON (Squelch is opened) cilitate BUSY signals. D ACCESSORY CONNECTOR !3 q @5 !4 Pin No. 1 2 3 4 5 6 7 8 9 10 Pin Name BUSY OUT COAXIAL SW M/S IN D1 D3 EXT RPT/BASE EXT MONI EXT DTCS EXTMOD IN B EXTMOD IN A Description Output terminal for busy signal. Specification Open collector=OFF, 0 V=ON Output terminal for coaxial switching (antenna switching) Open collector=OFF signal. 0 V=ON Input terminal for master/slave signal. Input terminal for selecting memory channel. Input terminal for selecting memory channel. +5 V pull up, Active=L +5 V pull up, Active=L +5 V pull up, Active=L Input terminal for repeater/base operating mode switching +5 V pull up signal. Active=L Input terminal for monitor function. Input terminal for continuous tone (CTCSS/DTCS) signal. +5 V pull up, Active=L Input impedance: 100 k (approx. ) Input terminal for the modulation signals applied to input of Input impedance: 600 (approx. ) the splutter filter circuit. Input terminal for the modulation signal applied to input of Input impedance: 600 (approx. ) the pre-emphasis circuit via the bandpass filter. Solder or clamp the cable lug when connecting the power cable to the backup battery to prevent voltage drops. Power cable current capacity: 25 A or more BATTERY AC EXT SP TX/TX·RX REMOTE ACC RX GND [TX(TX·RX) ANT] (p. 5) TX·RX antenna required for installing an internal duplexer. [RX ANT] (p. 5) 6 2 INSTALLATION AND CONNECTIONS I Advanced connections LINE CONNECTOR (Front panel view) TE L qr q NC (No connection) w L1 input/output e L2 input/output r NC (No connection) * This illustration is example only. Telephone connector type is different for some countries. EXTERNAL SPEAKER icom sp-7 Use a 4 speaker. BATTERY AC EXT SP TX/TX·RX REMOTE ACC RX GND [REMOTE] (p. 3) Used for external equipment control. ACC CONNECTOR (pgs. 3, 4) Used for external equipment control. 7 INSTALLATION AND CONNECTIONS 2 I Power Make sure the [POWER] switch is turned OFF when connecting an AC power cable and a backup battery (emergency power supply). The CM-8B series can operate with an AC or DC power supply. If AC power is interrupted when operating the repeater with an AC power supply, power is automatically provided to the [BATTERY] terminals. NOTE: When repeat to turn the repeater ON and OFF quickly, the repeater may not turn ON. In this case turn OFF the power switch and wait for a while, then turning power ON again. I Mounting the repeater D Using the optional MB-78 An optional MB-78 19 INCH RACK MOUNT BRACKET is available for mounting the repeater into a 19 inch rack. [. . . ] 5 sary), the antenna feedline or antenna cononly strong signals are has a poor contact or short-circuited. Received signal cannot · Optional voice scrambler is turned OFF. · Scrambler code is not set correctly. · Turn the optional voice scrambler ON. [. . . ]