Scott AFB - VHF Trunked System Up

[KD4YGG]

Drove by the base on IL-161 with the trusty PRO-97 in signal stalker mode today. Heard the familiar sound of Motorola data channels and saw 138.2625Mhz on the display. This looked to be interesting...

Here's what I discovered:

System ID: B209
Base: 137.0000 Mhz
Offset: 460 (this took some time to figure out)
Step: 12.5

Frequencies
138.1375
138.2625d
138.3125
138.3375
138.3625
138.3875
138.4125

Talkgroups:
560 Units Calling Tower
1792 Telemetry (this is almost 100% duty cycle)
1152 Lima Charlie Units Doing Radio Checks (logistics)
1168 Units Calling Dispatch

Most traffic appeared to be relief efforts for Hurricane Katrina.

The PRO-96 I had with me will not tune the correct step size.
The PRO-97 wouldn't decode any APCO-25.
Oh, the good old days of TRUNKER!!!

Here's the link to the entry in the database:
http://www.radioreference.com/modules.php?name=TRSDB&sid=4205&d=trsinfo

 

[kikito]

The PRO-96 I had with me will not tune the correct step size.

The Pro-96 should still work fine since I monitor a similar system that's also VHF with 12.5kHz frequencies. The radio tunes to the closes one and everything works correctly.

 

[DaveH]

System ID: B209
Base: 137.0000 Mhz
Offset: 460 (this took some time to figure out)
Step: 12.5

Frequencies
138.1375
138.2625d
138.3125
138.3375
138.3625
138.3875
138.4125

That looks like a base of 138.0000, offset 380 and
step 12.5kHz. What you have will work but I wouldn't
expect to see any channels below 138.

Dave

 

[N9PBD]

Scott AFB - VHF Trunked System Question

Has anybody been actively monitoring this system lately? I have it programmed into my PRO-96, but I don't appear to have the correct offset, as the VC's that it stops on don't carry any audio.

This leads me to believe that I don't have the right channel offset.

I tried both of the recommended table settings in the previous posts.

thanks,

Greg
N9PBD