• To anyone looking to acquire commercial radio programming software:

    Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. All requests will be deleted and a forum infraction issued. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The same goes for any private transaction via Private Message. Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity.

    If you are having trouble legally obtaining software please state so. We do not want any hurt feelings when your vague post is mistaken for a free request. It is YOUR responsibility to properly word your request.

    To obtain Motorola software see the Sticky in the Motorola forum.

    The various other vendors often permit their dealers to sell the software online (i.e., Kenwood). Please use Google or some other search engine to find a dealer that sells the software. Typically each series or individual radio requires its own software package. Often the Kenwood software is less than $100 so don't be a cheapskate; just purchase it.

    For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. One package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola).

    This is a large and very visible forum. We cannot jeopardize the ability to provide the RadioReference services by allowing this activity to occur. Please respect this.

Crosstalk Possible?

Status
Not open for further replies.

Mattkuhar

Member
Joined
Oct 3, 2013
Messages
137
Location
New Haven County, CT
Im going to be installing several radios in my 2005 CVPI soon, a mix of UHF and VHF, and im mounting the antennas on the roof. My question is, should i consider running a piece of braided shield on the outside of each run of coax to further reduce any interference (inserting the coax inside the shield) there will be 3-4 radios with coax running in the same pillar along each other.
 

jonwienke

More Info Coming Soon!
Premium Subscriber
Joined
Jul 18, 2014
Messages
12,016
Location
VA
No. if you're using decent quality coax and the antennas are installed properly such that the shield isn't radiating RF, the coupling between antennas will be greater than leakage through the coax shield.
 

jonwienke

More Info Coming Soon!
Premium Subscriber
Joined
Jul 18, 2014
Messages
12,016
Location
VA
I wouldn't worry about it. It's what's in my vehicle and I have minimal crosstalk.
 

mmckenna

I ♥ Ø
Joined
Jul 27, 2005
Messages
13,318
Location
SNCZCA01DS0
Im going to be installing several radios in my 2005 CVPI soon, a mix of UHF and VHF, and im mounting the antennas on the roof. My question is, should i consider running a piece of braided shield on the outside of each run of coax to further reduce any interference (inserting the coax inside the shield) there will be 3-4 radios with coax running in the same pillar along each other.
There already is a piece of grounded braided shield over the coaxial cable, no need to add more.

Where you can run into issues is if you are using really cheap coax that has lots of big holes in the shield. Shouldn't be an issue with the genuine Motorola antenna mount, or any of the name brand US market stuff.
Another good reason to avoid the no-name Chinese market coax.
 

prcguy

Member
Joined
Jun 30, 2006
Messages
9,741
Location
So Cal - Richardson, TX - Tewksbury, MA
I've had to run coupling tests on close coax runs and for high quality braided coax you will usually see 40dB or higher coupling up to 1GHz depending on how many feet the two coax cables are run next to each other. In a mobile environment this is probably 30dB better than the coupling you will get between antennas.
prcguy
 
Status
Not open for further replies.
Top