dsub 9-pin accessory connector
pin 1: output logic squelch high: radio receiving the signal with the correct ctcss or dcs. low: radio not receiving the signal with the correct ctcss or dcs.
pin 2: output rx discriminator (need to set the solder short on the pcb) jp3 (jp1503) - flat: 10 hz to 3.0 khz (140 mvrms / std deviation with 600 ohm termination) or jp4 (jp1504) - filtered 300 hz to 3.0 khz (70 mvrms / std deviation with 600 ohm termination) * jp3: closed from the factory. jp4: not closed from the factory.
pin 3: input tx data to the radio modulator. (flat: 10 hz to 3.0 khz) (40 mvrms / std deviation)
pin 4: dtr / txd: not used
pin 5: ground
pin 6: output horn alert signal (open collector with maximum 16.0 v, 100 ma sink).
pin 7: input external ptt [low: request the transmission] [high: request the receiving]
pin 8: output supply voltage (need to set the solder short on the pcb) jp1 (jp1501) output 5.0 v (maximum 100 ma output) or jp2(jp1502) output 13.2 v (maximum 100 ma output) * both jp1 and jp2 are not closed from the factory.
pin 9: input the ignition signal of the car. this signal is for the following operation, (1) disable the horn alert during the ignition is turned on. (2) turn on and off the radio. this function requires the solder short jp8 (jp1508). 3
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rf unit jumper information
jp1501 (jp1): determine the output supply voltage at pin 8 of dsub 9-pin accessory connector. close: +5.0 v (maximum 100 ma) open: no action
jp1502 (jp2): determine the output supply voltage at pin 8 of dsub 9-pin accessory connector. close: +13.2 v (maximum 100 ma) open: no action
jp1503 (jp3): determine the rx discriminator output characteristic at pin 2 of dsub 9-pin accessory connec- tor. close: flat 10 hz to 3.0 khz (140 mvrms / std deviation with 600 ohm termination) open: no action
jp1504 (jp4): determine the rx discriminator output characteristic at pin 2 of dsub 9-pin accessory connec- tor. close: filtered 300 hz to 3.0 khz (70 mvrms / std deviation with 600 ohm termination) open: no action
jp1505 (jp5): no action (spare jumper).
jp1506 (jp6): define whether the tx data input at pin 3 of dsub 9-pin accessory connector shall be "on" or "off" according to the external ptt input signal signal (pin 7 of dsub 9-pin accessory connec- tor). close: on (enabled) open: off (disabled)
jp1507 (jp7): determine the tx data input level at pin 3 of dsub 9-pin accessory connector. close: 400 mvrms / std deviation with 600 ohm termination open: 40 mvrms / std deviation with 600 ohm termination jp1508 (jp8): define whether the transceiver's power shall be "on" or "off" according to the ignition signal input (pin 9 of dsub 9-pin accessory connector). close: turn the transceiver on when the ignition signal input (pin 9 of dsub 9-pin accessory connector) is turned to "high" while the vol/pwr knob is set to the "on" position (out of the click-stop position). open: no action
