Actually, it's neither.? Consistent with Bob WB4APR's focus on making things compact and simple, it's a code that approximates the effective range of a station.?

See:?

Greg? KO6TH

Tim and Janet via wrote:

Good afternoon.

I was setting up a digi based on a RPI? and was curious what the standard is for specifying?the antenna gain as part of the PHG.? Is it Dbi or Dbd???

Thanks and 73,

Tim KB2MFS

Greg,

I am looking to get the PHG circle correct on the maps.? I am setting up a Digi using direwolf.? In that configuration the example given does not simply use a code as is suggested by Bob at the link you provided.? So, I am not sure how to specify the syntax on the PBeacon line.? A syntax example is:??PBEACON delay=11 every=4 overlay=S symbol="digi" lat=42^08.85N long=071^13.61W power=1 height=20 gain=1 comment="East Walpole MA"

For this example I assume the code would be 1110. But how do you express that correctly for direwolf?

Even looking at the chart provided, the question of antenna gain is still there.? In my case, my power is 25 watts, antenna HAAT is 40' (ish), and antenna gain is 6.5 Dbi and omnidirectional.? ? The chart lists antenna gain as dB not Dbi or Dbd.? So in my case, the code could be 5260 or 5240 depending on whether this is based on Dbi or Dbd.??

What am I?missing?? Seems no matter what, the chart should specify gain as dBi or dBd NOT dB.

There is probably a dedicated direwolf group out there, but since I was a member here, I thought I would solicit a response here first.

Thanks.

Tim KB2MFS

On Sun, Dec 29, 2024 at 3:20?PM Greg D via <ko6th.greg=[email protected]> wrote:

Actually, it's neither.? Consistent with Bob WB4APR's focus on making things compact and simple, it's a code that approximates the effective range of a station.?

See:?

Greg? KO6TH

Tim and Janet via wrote:

Good afternoon.

I was setting up a digi based on a RPI? and was curious what the standard is for specifying?the antenna gain as part of the PHG.? Is it Dbi or Dbd???

Thanks and 73,

Tim KB2MFS

You beat me to it....? Yes, dBi.

If anyone else is looking for the other pbeacon settings, it's on PDF Page 87 (printed page 80 ) here:
?

Greg? KO6TH

Tim and Janet via wrote:

Well looks like I finally found my answer after digging for quite?some time.? The antenna gain is specified by using dBi.? Not sure why the reference of dB is used......

Back to monitoring.

73,

Tim KB2MFS

On Sun, Dec 29, 2024 at 4:09?PM Tim and Janet via <kb2mfs=[email protected]> wrote:

Greg,

I am looking to get the PHG circle correct on the maps.? I am setting up a Digi using direwolf.? In that configuration the example given does not simply use a code as is suggested by Bob at the link you provided.? So, I am not sure how to specify the syntax on the PBeacon line.? A syntax example is:??PBEACON delay=11 every=4 overlay=S symbol="digi" lat=42^08.85N long=071^13.61W power=1 height=20 gain=1 comment="East Walpole MA"

For this example I assume the code would be 1110. But how do you express that correctly for direwolf?

Even looking at the chart provided, the question of antenna gain is still there.? In my case, my power is 25 watts, antenna HAAT is 40' (ish), and antenna gain is 6.5 Dbi and omnidirectional.? ? The chart lists antenna gain as dB not Dbi or Dbd.? So in my case, the code could be 5260 or 5240 depending on whether this is based on Dbi or Dbd.??

What am I?missing?? Seems no matter what, the chart should specify gain as dBi or dBd NOT dB.

There is probably a dedicated direwolf group out there, but since I was a member here, I thought I would solicit a response here first.

Thanks.

Tim KB2MFS

On Sun, Dec 29, 2024 at 3:20?PM Greg D via <ko6th.greg=[email protected]> wrote:

Actually, it's neither.? Consistent with Bob WB4APR's focus on making things compact and simple, it's a code that approximates the effective range of a station.?

See:?

Greg? KO6TH

Tim and Janet via wrote:

Good afternoon.

I was setting up a digi based on a RPI? and was curious what the standard is for specifying?the antenna gain as part of the PHG.? Is it Dbi or Dbd???

Thanks and 73,

Tim KB2MFS

Since APRS is designed to provide information to the other operators in the area in an attempt to help everyone understand the capabilities of the local APRS network, stop and think about what information you want to convey.?

While you might want to tell everyone that you are using 21.3 watts into an omnidirectional 7.8 dBi gain antenna with a HAAT 78 feet, it might be better to use a PHG setting that shows a coverage approximation that more realistically shows the area your station can hear/be heard.?

For example, you might want to set your direction offset to show that the hill behind your house blocks coverage in that direction, even though you are using an omni antenna.?

Having a PHG coverage plot that is closer to showing real world coverage versus manufacturer’s specifications is better for all.

It allows those viewing the APRS map to be able to understand how the local network can communicate.?

With real world PHG plots, one might be able to find an approximation of a jammer’s location based on who can hear the station.?

Accurate information in this instance can have two different configurations.?

Think about whether you are trying to brag about your station, or provide helpful information to others in the area.?

James
VE6SRV

On Sun, Dec 29, 2024 at 19:01 Greg D via <ko6th.greg=[email protected]> wrote:

You beat me to it....? Yes, dBi.

If anyone else is looking for the other pbeacon settings, it's on PDF Page 87 (printed page 80 ) here:
?

Greg? KO6TH

Tim and Janet via wrote:

Well looks like I finally found my answer after digging for quite?some time.? The antenna gain is specified by using dBi.? Not sure why the reference of dB is used......

Back to monitoring.

73,

Tim KB2MFS

On Sun, Dec 29, 2024 at 4:09?PM Tim and Janet via <kb2mfs=[email protected]> wrote:

Greg,

I am looking to get the PHG circle correct on the maps.? I am setting up a Digi using direwolf.? In that configuration the example given does not simply use a code as is suggested by Bob at the link you provided.? So, I am not sure how to specify the syntax on the PBeacon line.? A syntax example is:??PBEACON delay=11 every=4 overlay=S symbol="digi" lat=42^08.85N long=071^13.61W power=1 height=20 gain=1 comment="East Walpole MA"

For this example I assume the code would be 1110. But how do you express that correctly for direwolf?

Even looking at the chart provided, the question of antenna gain is still there.? In my case, my power is 25 watts, antenna HAAT is 40' (ish), and antenna gain is 6.5 Dbi and omnidirectional.? ? The chart lists antenna gain as dB not Dbi or Dbd.? So in my case, the code could be 5260 or 5240 depending on whether this is based on Dbi or Dbd.??

What am I?missing?? Seems no matter what, the chart should specify gain as dBi or dBd NOT dB.

There is probably a dedicated direwolf group out there, but since I was a member here, I thought I would solicit a response here first.

Thanks.

Tim KB2MFS

On Sun, Dec 29, 2024 at 3:20?PM Greg D via <ko6th.greg=[email protected]> wrote:

Actually, it's neither.? Consistent with Bob WB4APR's focus on making things compact and simple, it's a code that approximates the effective range of a station.?

See:?

Greg? KO6TH

Tim and Janet via wrote:

Good afternoon.

I was setting up a digi based on a RPI? and was curious what the standard is for specifying?the antenna gain as part of the PHG.? Is it Dbi or Dbd???

Thanks and 73,

Tim KB2MFS