Would someone please explain in detail what the ZM Threshold, ZM Slope, and ZM delay are on the Whistler TRX2?
thanks
anelson5004
thanks
anelson5004
Well, they all have to do with the ZM. The first is the Threshold, the second is the Slope, and the last is the Delay! I know this because I translate furniture assembly instructions for a Chinese company!!Would someone please explain in detail what the ZM Threshold, ZM Slope, and ZM delay are on the Whistler TRX2?
thanks
anelson5004
ZM = Zeromatic.Well, they all have to do with the ZM. The first is the Threshold, the second is the Slope, and the last is the Delay! I know this because I translate furniture assembly instructions for a Chinese company!!
Sorry, couldn't resist! I too would love a good explanation of these....
It's not an AFC, it's the opposite. It the received frequency are not spot on it will ignore it.I guess they control how the scanner homes in on the correct frequency.
Thats exactly what happend to my TRX-1 after updating to firmware 5.2It's not an AFC, it's the opposite. It the received frequency are not spot on it will ignore it.
/Ubbe
So this: <http://forums.radioreference.com/showthread.php?t=20450> is wrong?It's not an AFC, it's the opposite. It the received frequency are not spot on it will ignore it.
/Ubbe
Did you mean Flex Step as I don't see a Zeromatic on/off option? It could be right in front of me too, just say'n lolAfter unchecking the Zeromatic check box in the menu (default = ON) the TRX-1 is working fine again in search and tune mode.
Mark
That's a great explanation, thanks for the link/thread. I knew what it did, I did not know why/what to really use it for. Thats explanation nails it, and it's from 2005.So this: <http://forums.radioreference.com/showthread.php?t=20450> is wrong?
As far as i know there's no option to turn Zeromatic on or off in EZ scan.Did you mean Flex Step as I don't see a Zeromatic on/off option? It could be right in front of me too, just say'n lol![]()
Yes, that is totally wrong. It is explained in older GRE scanners manuals. Older scanners used to have a selection of 5KHz turbo step in search and it would stop on frequencies that where 5KHz off, or more, and by using ZeroMatic it only stopped on the correct frequency. The scanners tuning need to be correct and if using ZM makes it skip channels that are supposed to match then something is wrong.So this: <http://forums.radioreference.com/showthread.php?t=20450> is wrong?
They why are there THREE parameters Threshold, Slope and Delay?Yes, that is totally wrong. It is explained in older GRE scanners manuals. Older scanners used to have a selection of 5KHz turbo step in search and it would stop on frequencies that where 5KHz off, or more, and by using ZeroMatic it only stopped on the correct frequency. The scanners tuning need to be correct and if using ZM makes it skip channels that are supposed to match then something is wrong.
edit: I did a search with ZM off and it stops 6,25KHz both before and after the correct frequency with any strong DMR site. So it works as it should in my TRX-2. Values are Delay=50 Threshold=1180 Slope=520
/Ubbe
You have to consider that the PLL/VCO are not quick enough and need a settling time before you can start to detect the signal and needs a delay time. The VCO reacts differently and settling time will change depending of the frequencies so I guess the slope value are used to compensate for that phenomen.They why are there THREE parameters Threshold, Slope and Delay?
How could you possibly need three if it's just a simple variable size window the signal has to be within?