700MHZ in an xts

[thecanadiangod]

Hey, I have an XTS 5000 700/800, some of the 700mhz frequencies have 5 numbers after the dot. for instance, 769.01375

the CPS will not let me put 5 digits after the dot.

How do I get around this?

 

[buddrousa]

Is this for a Conventional System or a Trunking System?

 

[thecanadiangod]

Is this for a Conventional System or a Trunking System?

conventional

 

[thecanadiangod]

Is this for a Conventional System or a Trunking System?

I should also mention is does let me put four digits after the dot in the 700mhz band. however i need to put 5 in to get the frequency i am trying to program

 

[MEDIC135]

Set your frequency to narrowband 2.5mhz
Then it will allow you to put the full frequency in

 

[thecanadiangod]

Set your frequency to narrowband 2.5mhz
Then it will allow you to put the full frequency in

Where would i find that setting option? I do not see it.

 

[chrismol1]

Scroll all the way over Tx Opt Transmit Dev...2.5

 

[thecanadiangod]

Found it! I was looking in the personality's section. Thanks!

 

[nokones]

I believe he is dealing with a 6.25 KHz channel and not a 12.5 KHz channel and may not need to put in the last (5th digit) and the CPS and the codeplug will probably assume the last digit is a "5" based on the channel bandwidth selection and the proceeding freq digits inputed.

 

[GTR8000]

I believe he is dealing with a 6.25 KHz channel and not a 12.5 KHz channel and may not need to put in the last (5th digit) and the CPS and the codeplug will probably assume the last digit is a "5" based on the channel bandwidth selection and the proceeding freq digits inputed.

Uh, no. The issue has been resolved, it's a simple matter of setting the TX deviation to 2.5 kHz and has been discussed here in the past. What exactly do you think would be using 6.25 kHz in the 700 MHz band? Both P25 and analog narrowband FM are 12.5 kHz channel bandwidths, not 6.25.

 

[nokones]

Uh, no. The issue has been resolved, it's a simple matter of setting the TX deviation to 2.5 kHz and has been discussed here in the past. What exactly do you think would be using 6.25 kHz in the 700 MHz band? Both P25 and analog narrowband FM are 12.5 kHz channel bandwidths, not 6.25.

Because it is an allocated 6.25 KHz spaced channel.

 

[GTR8000]

Because it is an allocated 6.25 KHz spaced channel.

Spacing ≠ bandwidth

 

[GTR8000]

I'll provide a bit more context for those unaware. Way back in the day when the 700 MHz spectrum was first allocated for public safety, the channels were created in 6.25 kHz blocks, as it was assumed that would ultimately be the bandwidth for P25 Phase II TDMA. As we now know, the bandwidth for P25 TDMA traffic channels is 12.5 kHz, and so for the past decade plus, the 700 MHz public safety narrowband spectrum has been allocated in 12.5 kHz blocks.

In fact the frequencies with 5 digits to the right of the decimal point are the 12.5 kHz allocations, e.g. 769.01875. The 6.25 kHz blocks result in 6 digits to the right of the decimal point, e.g. 769.015625

Bottom line: 2.5 kHz Tx deviation/12.5 Tx spacing is correct for the 700 MHz public safety narrowband spectrum.