Batboard

I have a dual band syntor system. I am able to program both units fine. along with the control head. The problem is when I tx on the uhf band I also tx on the vhf band and the other way around. I removed all options bds as well as replacing the vhf draw. The vhf is the primary radio.
Thanks

Is it a quick keyup or continous tx? It is normal for the alternate radio to do a quick keyup of the transmitter. Also, did this just happen or something new....factory or custom built cable?

When you transmit the non-selected radio exciter becomes active on its selected channel and transmits without any pl on it. Power out from the non-selected radio is very minimal. This is the way the dual set up works. I can't explain why, I just know they do it.

Jason

It only tx's when the ptt is pushed. All the equipment is factory as well as the cables. This has been a problem from day one. The way I get around it is I programmed a mode with no Xmit in the opposite band and leave it there when I tx .
Thanks

I have reprogrammed the vhf radio to be the secondary not the primary. As well as doing the same to the uhf side. It makes no difference which radio is the primary. Also the both tx with full power and pl.

If your non-selected radio is transmitting at full power you definately have a problem. Have you tested it with a watt meter?

Jason

I had the same problem,, make sure your "ALT" button isnt stuck in, or reprogram to a different button..goodluck

Are you sure you have the proper firmware in both drawer units?

Do you get any error codes?

Are you sure they are programmed right?

What is the part number of the control head? Are you using an HCN1063 or above or are you trying to use an HCN-1033 or something without replacing the processor?

I really think this setup is programmed as two single radios. Either that, or you have the wrong firmware. Also, a hint about the add-on boards...they have to be strapped for the group of the radio that they are installed in...like a DTMF board has straps and no straps is a single radio, strap one is for the primary and strap two is for secondary...etc...

Now that I think about it...you have the wrong firmware. You may have successfuly programmed it with the RSS, but that's not the whole story.

Last question: What is the part number of the firmware in your drawers? Get your mind off that...I mean what firmware is in your radios?

George

Jason,

The reason why both radios transmit at the same time, only one at a very low power level is so the radio that's doing the transmitting at high power doesn't burn up the front end of the radio that's in ALT mode. This was a problem when certain government agencies had two radios in the same band in their vehicles. As a result, both transmit, but the ALT radio should be going to its "park" frequency. I know where this is for lowband, but I forget if it applies to VHF or UHF...just dig around in the RDPROG and you will find it...I think under Radio Wide, but I forget.

George

Oh, and the more I think about this, the more I'll bet those two drawers have T38 or T53 suffixed firmware. Either that, or some other garbage that should be hitting the trash. If it's not T53 or T52 for conventional drawers and T69 or T70 for the dual drawer...I don't want it.

Make sure both radios have the 8k U502 EEPROM (also known as option code W930). If you have the Systems 9000 control head, it also needs an 8k EEPROM. ALL programming code plugs should be started with option 8 (W930). Make sure you have the 0106710T70 dual radio drawer U501 chip installed in BOTH radio drawers.

Try connecting only the VHF radio with the programming cable attached (the UHF radio should not be connected). First, program the radio as a single radio drawer. Then program the radio again as a primary radio.

Next, remove the VHF radio drawer and attach the UHF radio drawer with the programming cable. Program this radio as a single radio drawer. Then program the radio again as a secondary radio.

By resetting each radio to a single radio drawer code plug first, you will ensure each radio will accept the primary or secondary programming that follows.

If you have the Systems 9000 head, program the control head ALT key to select between the two radio drawers.

Connect both radios without the programming cable.

Remember to remove the main fuse when changing or messing with the radio cable:
http://www.open.org/~blenderm/syntorx/p ... #pgq_cable

Hello.

Correct, the primary radio runs full power, the alt goes to park, should be a no TX selection.
Firmware can be changed in a radio, but it is a real pain, all the tracking/steering info needs to be recompiled for THAT radio.
Have done it, 2 day bench project.