Barnett Engineering B1474 - Manual (Page 6)

2 SPEC I FI CA TIONS
GEN ERAL
Trans mis sion Rate: 1200 Baud (Bell 202 sig naling) or V.23 if fac tory in stalled
Trans mis sion For mat: 8 data bits, no par ity, 1 stop bit if mo dem buff er ing is se lected;
oth er wise trans par ent
Power Re quire ment: Op er ates from 12 to 30 VDC. Cur rent drain is 110 mA with the LEDs on,
65 mA with the LEDs off.
Tem per a ture Range: -30
o
C to +50
o
C
Phys i cal Size: Approx. 10" x 5" x 1", in side a metal en clo sure
Ra dio and Wire line: Com pres sion screw ter mi nals lo cated in side the en clo sure
Data Con nec tor: RS232-C com pat i ble, con nec tions avail able through a DB-25S socket
lo cated on the side of the en clo sure
In di ca tors: Power ON, TXD, RXD, CD, RTS, CTS, BUSY
Re ceive Au dio: Sin gle ended, AC cou pled, -30 dBm to 0 dBm
Trans mit Au dio: Sin gle ended, AC cou pled, -20 dBm to 0 dBm
Squelch De tec tion: Sin gle ended, 1M ohm im ped ance, DC cou pled, de tec tion range
0 to 10 volts, po lar ity is DIP switch selectable
PTT: Clo sure to ground for ac tive, 0.5 A @ 50 volts max.
4 Wire Re ceive: Bal anced, 600 ohm im ped ance, -30 dBm to 0 dBm (op er ates full or
half du plex)
4 Wire Trans mit: Bal anced, 600 ohm im ped ance, -20 dBm to 0 dBm (op er ates full or
half du plex)
DIP SWITCH SET TINGS
Trans mit ter Level: -20 dBm to 0 dBm
Re ceiver Level: -30 dBm to 0 dBm
Squelch Po lar ity: Se lects high or low go ing squelch mon i tor sig nals.
Car rier De tect De lay: 5 or 50 msec
As sert RTS: Forces RTS on.
RTS/CTS De lay: 20, 35, 50, 100, 200, 300, 500, or 1000 msec. Al lows the trans mit ter
time to reach full power be fore data is trans mit ted.
B1474 BARNETT EN GI NEERING LTD. PAGE 5