instrumentphilip
Member
Qustion 1: I have a question about trunking. I am pretty sure I have the concept understood for the most part. Handheld radio sends request to the Control Channel and the control channel gives the radio / talkgroup a free Frequency from the pool of frequencies on that radio system. Then switches to another ( frequency) if a radio is not keyed up within a certain time.
What I have a question about is when the Let's say on a P25 Trunking System a Police Officer keys up his handheld radio on Talkgroup 310 ( Dispatch Talkgroup ) and his radio sends a request to Control. Now When he first keys up does the control channel / or just control have an input frequency? Like is that radio listening on the Control Frequency for commands but is transmitting to talk to the control frequency on another frequency / input frequency?
Question 2: When the radio on Talkgroup 310 Gets assigned a frequency how is that working? I mean I know there must be some sort of input frequency for the transmission of lets say a Portable Radio from a Police Officer to be re-transmitted / relayed over the transmit site at the Police Station so everyone can hear it. Because I know when they (Talkgroup ) get assigned that frequency from control channel they cannot be using simplex strictly on the assigned frequency.
Thanks,
Philip
What I have a question about is when the Let's say on a P25 Trunking System a Police Officer keys up his handheld radio on Talkgroup 310 ( Dispatch Talkgroup ) and his radio sends a request to Control. Now When he first keys up does the control channel / or just control have an input frequency? Like is that radio listening on the Control Frequency for commands but is transmitting to talk to the control frequency on another frequency / input frequency?
Question 2: When the radio on Talkgroup 310 Gets assigned a frequency how is that working? I mean I know there must be some sort of input frequency for the transmission of lets say a Portable Radio from a Police Officer to be re-transmitted / relayed over the transmit site at the Police Station so everyone can hear it. Because I know when they (Talkgroup ) get assigned that frequency from control channel they cannot be using simplex strictly on the assigned frequency.
Thanks,
Philip