Question About DSD+ Fastlane TIII (HYT) System Monitoring

[rkillins]

I am trying to monitor a local TIII (Hyt) system with my two RTL-SDR dongle setup wih DSD+ (fastlane). One dongle is tuned to the control channel with FMP24 and the scope is alive with the signal. DSD CC I think is decoding the control channel as the system information is displayed and the Event Log is showing some activity (ACK and NAK entries).

But in the DSD+ TIII CHannel Activity Window, their is no real information present. I line of partial info ... under Ch is a '?' and under Target is 'CC'

Am I missing out on the proper operation of DSD+ (in terms of receiving voice with via my other dongle and DSD+ VC). Is not having control channel information in the Channel Activity Window problematic, or is this normal for a relatively inactive system?

I do have this in my DSD+ frequencies file:

; Fastnet Baden
TIII, 13, 1.5, 447, 422.7750, 0, 0
TIII, 13, 1.5, 447, 422.9000, 0, 0

422.7750 is the active control channel. I assumed this should be populating the Channel activity window?

 

[ATCTech]

To start with both frequencies can't be channel 447. Try changing the channel # for 422.900 to 467 and just for safety-sake the second last "0" in each line to "0.0"

 

[rkillins]

Thats a typo. Should be 467.

 

[ATCTech]

Ok, make the other change for the input frequencies to be 0.0 and see if it helps. FastNet is a very quiet system. The CC activity window looks like you say until there's some sort of voice call activity. I'm looking at the Toronto site right now and it's a "?" too.

 

[rkillins]

Thanks ATCTech. Done. No difference. Perhaps just need patience. I was just concerned that the channel number wasn't displayed in the Channel Activity Window considering it had identified the signal as the CC. Maybe once it sees some activity.

 

[ATCTech]

It will. I only see the Georgetown taxi service on that system once in a while and a little bus traffic from Durham on the mornings/afternoon weekdays.