http://www.lcblanton.com/dfw/tx-dps.htm
been so long since i programmed my radio to recieve only.
do i need to have 2 channels 1 for the recieve and 1 for the transmit so i can hear both sides of the conv?
as mobile to mobile 1 chans dift then the other i want to hear both sides of conv
need help
Moderator: Queue Moderator
Not true. DPS here in TX runs duplex, unless they turn the repeater on (which they usually only do during an operation, a chase, etc.) If you want a chance at hearing the mobile side, you'll need to program that into your radio as a second channel.
Standard caveats of needing to be close enough, etc. apply.
Standard caveats of needing to be close enough, etc. apply.
How does everyone other than the dispatcher hear the traffic then? Scan group?tvsjr wrote:Not true. DPS here in TX runs duplex, unless they turn the repeater on (which they usually only do during an operation, a chase, etc.) If you want a chance at hearing the mobile side, you'll need to program that into your radio as a second channel.
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Aces-Warehouse
- Posts: 168
- Joined: Fri Jan 23, 2004 10:27 pm
Ok hang in here with me on this = I think i can explain whats happening and even give you your answer.
I looked at the webb site you provided per the freqs an ch ect.
Lets just look at ch 1 and ch 2 for this explanation.
On the webb page you provided freq 1 was tx 154.680 with a rx freq of 155.460.
Ok this is whaty appears to be a repeater split for freqs.
So what happens with the mobile/portable when it uses chanel 1 is this:
The mobile txs on freq 154.680 and the repeater hears it on its rx that is setup for freq 154.680 and then takes that audio and the repeater retransmits it (REPEATER) at the repeaters tx freq of 155.460 which just happens to be the mobiles rx freq as well.
So now you see how a repeater works.
Ok if you look at the ch 2 freqs on the page you supplies you will see that the tx and rx freq are the same and it is 155.460
Which would be considered the talk around freq or also mobile to mobile as they described it.
So when the mobile goes to ch 2 and they talk back and forth as tx 155.460 and the other recieves it as 155.460 you are now talking car to car so to speak.
But if you now take notice that this mobile to mobile freq of 155.460 just happens to be the same as the repeaters output freq or retransmit freq youll notice they are the same.
But the repeater didnt retransmit it because it didnt hear it because as explained above the repeaters rx freq is not 155.460 = its 154.680
And since ch 2 didnt tx on the repeaters hearing side input or rx it will not repeat it.
So if you just want to hear both youd only need to program the rx freq of 155.460 since anything said on the other freq would be repeated on this freq any way and of course ch freq is already here as well for the same freq.
Now as long as they are using the same PL/DPL code for both youd be fine otherwise you may want to program two chanels for the same freq but diferent PL/DPL as needed.
If your just using a scanner then go with the one freq and dont worry about the PL/DPL as most scanners dont care.
If youd want to program the radio as rx freq only then with most radios youd leave tx freq empty or type in the word BLANK and program it as such.
Hope thois helps a bit.
EKLB
I looked at the webb site you provided per the freqs an ch ect.
Lets just look at ch 1 and ch 2 for this explanation.
On the webb page you provided freq 1 was tx 154.680 with a rx freq of 155.460.
Ok this is whaty appears to be a repeater split for freqs.
So what happens with the mobile/portable when it uses chanel 1 is this:
The mobile txs on freq 154.680 and the repeater hears it on its rx that is setup for freq 154.680 and then takes that audio and the repeater retransmits it (REPEATER) at the repeaters tx freq of 155.460 which just happens to be the mobiles rx freq as well.
So now you see how a repeater works.
Ok if you look at the ch 2 freqs on the page you supplies you will see that the tx and rx freq are the same and it is 155.460
Which would be considered the talk around freq or also mobile to mobile as they described it.
So when the mobile goes to ch 2 and they talk back and forth as tx 155.460 and the other recieves it as 155.460 you are now talking car to car so to speak.
But if you now take notice that this mobile to mobile freq of 155.460 just happens to be the same as the repeaters output freq or retransmit freq youll notice they are the same.
But the repeater didnt retransmit it because it didnt hear it because as explained above the repeaters rx freq is not 155.460 = its 154.680
And since ch 2 didnt tx on the repeaters hearing side input or rx it will not repeat it.
So if you just want to hear both youd only need to program the rx freq of 155.460 since anything said on the other freq would be repeated on this freq any way and of course ch freq is already here as well for the same freq.
Now as long as they are using the same PL/DPL code for both youd be fine otherwise you may want to program two chanels for the same freq but diferent PL/DPL as needed.
If your just using a scanner then go with the one freq and dont worry about the PL/DPL as most scanners dont care.
If youd want to program the radio as rx freq only then with most radios youd leave tx freq empty or type in the word BLANK and program it as such.
Hope thois helps a bit.
EKLB
