Power input interface machine is provided with a set of car roof intercom system, using the DC24V power supply of the machine is connected to the positive and negative terminals, L, terminal R output voltage DC17.5~19.5V, L terminal is the end of R is negative; the machine is provided with a call request button, the need to call, please press the call button for the room. The host and the host's ring, also calls the duty room lights room duty room host or host machine can be set up call, can be picked up at the same time enter among the three calls.
A (10%) the duty room of the ten channel is provided with a power input interface, using DC24V + + power supply;
B) ten channel duty room is provided with a digital host "1~10", "*" and "#" a total of 12 buttons, ten call indicator light (red), intercom subsystem corresponding to the ten channel call, the indicator light is green, when picked up the lamp, hang up when the lights went out;
C) when any ten intercom subsystem intercom call request, call the corresponding channel indicator, after picking up according to the digital button corresponding channel, about 2 to 3 seconds after the call can be established with the intercom system, call the corresponding channel call lights flashing, exit the channel call after call the lights off, such as call lights call not the off hook channel lit (call hang up call lights in all channels will go out);
D) in the call state, according to the number of buttons in other channels will hang up the call intercom system, about 2 to 3 seconds to talk system corresponding to the establishment of new calls for about 2 to 3 seconds;
E) duty room host request to initiate a call, press any button hook intercom digital intercom subsystem and the need to call the intercom system for establishing communication. Audio debugging in the factory before the sound of all walkie talkie has been adjusted to the best state, so generally do not need to adjust.
However, due to the distance impedance and other issues, the following problems may be found at the scene:
A when you feel that the sound of the intercom is too small, adjust the potentiometer VR2 (Zi Ji) can adjust the output volume of the machine, making the size of the sound. The left hand is small and the right one is large.
B when you feel that the sound of the intercom is too small, adjust the potentiometer VR1 can adjust the size of the output sound, making the size of the sound. The left hand is small and the right one is large.
C) adjust the potentiometer VR3, can adjust the size of the machine side tone. If the Whistler, VR3 can be adjusted to the best state (adjusting in the process of VR3, when adjusted to a resistance, howling is minimal or no howling), if there is Whistler, with the regulation of VR2 makes the sound output is smaller, until not howling.
Previous: How to deal with elevator card?