Falmouth DPW 854.7125

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deacon
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Falmouth DPW 854.7125

Post by deacon »

The 854.7125 frequency "hang up" during the scan on my SDS200. It is the only frequency that does this. No audio when it happens. I have the CC at 7, DMR, Slot 1 & 2. I have set the delay to 0. Any thoughts??

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Scott
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Re: Falmouth DPW 854.7125

Post by Scott »

Maybe try some different filter settings and/or IFX. I'm taking shots in the dark with both statements.
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AJ1L
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Re: Falmouth DPW 854.7125

Post by AJ1L »

Maybe it's a CAP+ system and it's hanging up on the beacons?
Jeff Lehmann - AJ1L (Formerly N1ZZN) WQDJ863
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sawyer100
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Re: Falmouth DPW 854.7125

Post by sawyer100 »

We own our own Motorola TRBO radios (repeaters & direct/simplex), but don't have trunking. I had what seems to be the same issue you are having. I just started monitoring the Industrial Communications system, which is 900 MHz trunking. I have some conversations "get hung up" meaning the person stops talking (they unkey their radio) and my scanner sits there displaying the color code & no audio. Then is starts scanning again like normal. The State 800MHz analog I'm used to, the user unkeys, audio stops, silent, and then starts scanning. The ICE issue like yours is like they stop talking, and they still have mic keyed (but no audio). When someone sits on the mic, you hear background noise, but this is a "silent hang up".

anyhow, ICE is trunked, so maybe Falmouth DPW switched from conventional to trunked.?. is my thoughts (reading your words is like same that I witnessed). We have Uniden BCD996P2 mobiles.

deacon
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Re: Falmouth DPW 854.7125

Post by deacon »

From what I have read on SNE, Falmouth is DMR with one frequency. I have adjusted the filter setting, as Scott suggested, and it seems to make a slight difference. Switching to IFX made no improvement. I am going to try my 536hp and see what happens. Thank you for your response.

Chuck

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W1KNE
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Re: Falmouth DPW 854.7125

Post by W1KNE »

deacon wrote:
22 Apr 2020 13:29
The 854.7125 frequency "hang up" during the scan on my SDS200. It is the only frequency that does this. No audio when it happens. I have the CC at 7, DMR, Slot 1 & 2. I have set the delay to 0. Any thoughts??
Yep. You're hearing various data bursts of some kind coming through the repeater. I confirmed this today. It's not signalling that it's CAP+ or CON+, so it's not those. It could be a system of AVL or other necessary data.
Unfortunately, the best thing you can do is ID the TG used for voice traffic, and program it into your scanner as a single frequency trunk.

They are quick bursts so sometimes you don't hear it but there is definitely data there.

Also for what it's worth the data I saw was only on TS1. I never saw TS2 indicate after the bursts.
Mike Fitzpatrick
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Owner: Scan New England - NECRAT.US
Issues with Scan New England can be privately addressed to me. W1KNE at scan-ne.com.

deacon
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Re: Falmouth DPW 854.7125

Post by deacon »

Okay, thank you for the information. I will give the single trunk program a try.

Regards,
Chuck

deacon
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Re: Falmouth DPW 854.7125

Post by deacon »

The old man has success with the SDS200. Falmouth DPW is programmed as a single frequency DMR system. Doing so allows the radio software to ignore the data bursts. The SDS200 software will prompt your for TG, CC and slot number. It all works nicely. Two additional TG's have appeared. 25 and 14. More monitoring needed.

Chuck

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jeffkett
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Re: Falmouth DPW 854.7125

Post by jeffkett »

I believe that TG 25 is the Water Dept crew. Caught some talk on Wed 5/20.
Jeff

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