SDS150: Scan speed

KK4JW

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New owner of an SDS150 and I'm trying to get it figured out. There's a little learning curve here over my trusty Whistler WS1040. Right now, I'm trying to figure out the scan speed. It seems slow to me, and I'm even missing the first part of some transmissions because of it, I suspect.

I have turned OFF Nationwide / zip code scanning and am scanning only from 2 favorites lists. One Favorites List consists of 5 different local conventional systems, and each system has between 2-5 frequencies (a total of 25-30 frequencies total in the first favorites list) that are a mixture of NFM and P25 Conventional. The other Favorites List is one conventional system that has a total of five P25 conventional only frequencies. Between two Favorites Lists, I'd say a total of 35-ish frequencies are being scanned.

I've verified that EVERYTHING is turned off except for the two Fav Lists that I am interested in. I have turned OFF all filtering for each single frequency programmed in. I have set the "squelch" at the 2 setting, which is what I've read is recommended. I am not in an RF dense area at all, so there's no way I'm being hammered by intermod. I have the "hold time" set to "0". I did notice on some prior experimenting that when I increased the "hold time", it slowed down scanning. I had "hold time" confused for "delay time".

Time and time again, though, my WS1040 is stopping and grabbing transmissions that the SDS150 misses or is late stopping on. Hard for me to believe that a $950 piece of engineering marvel is being outperformed on NFM and Conventional P25 by a $300 five-year-old scanner. I just refuse to buy that, so I'm thinking that there's something else somewhere that needs adjusted.

Is this really the case, or is the scanner "scanning faster" than the display can update? I'd like to think that if the display updated as fast as the scanner actually was scanning, it would be a total blur and consumers might not like that, just a thought, I don't know.

Assistance please?
 

Enforcer52

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Scan speed is around 85 channels per second. So it is faster than the screen will update, and you will think it is skipping channels. The WS-1040 has a scan speed of around 50 channels per second.

Same thing happens on my BCD325P2 and my SDS200. There does seems to be a little delay compared to my sdr setup, but I don't miss any traffic when only one channel is being received. I just chalk it up to the decoding software built into the SDS scanners.
 
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nessnet

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What month is it?
I'm not sure from your post that every thing that is in your favorites is conventional - or is there some trunking also?

NOTE:
With trunking, you scan SITES, not individual talk groups.
Your radio will 'listen' to each site's control channel for a channel grant (a transmission) for X milliseconds, then if none, it'll move on to the next. Each "X milliseconds" add up and if you are trying to scan lots of sites, you will certainly miss stuff.
There is a well known adage here: "The more you scan, the less you'll hear".

First, only scan sites within range. Either by zip code, manual entry or GPS (because it is built in, this is the suggested method), make sure your location is accurate. Then, turn on location control for the favorite lists.
 

wtp

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with a trunked system and uniden there is a "housekeeping" delay of 2 seconds. per UPMAN.
but you would have to have one running for that.
HOLD time is how long the radio sits on and listens to a site/system.
DELAY time is how long the radio waits for a reply after a squelch break.
 

hill

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it's important to read up on Control Channel Only scanning, which Uniden scanners utilize. On trunked systems, it,s only scanning the Control Channel.

All good about discussing trunked system scan, but in the first post the OP states he is scanning conventional frequencies only..

I have turned OFF Nationwide / zip code scanning and am scanning only from 2 favorites lists. One Favorites List consists of 5 different local conventional systems, and each system has between 2-5 frequencies (a total of 25-30 frequencies total in the first favorites list) that are a mixture of NFM and P25 Conventional. The other Favorites List is one conventional system that has a total of five P25 conventional only frequencies. Between two Favorites Lists, I'd say a total of 35-ish frequencies are being scanned.


Going forward I think the SDS line of scanner excels at monitoring trunked systems and we can use lesser scanners for conventional.

Radios like your WS1040 can be dedicated to conventional and P25 conventional.
 

nessnet

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with a trunked system and uniden there is a "housekeeping" delay of 2 seconds. per UPMAN.
but you would have to have one running for that.
HOLD time is how long the radio sits on and listens to a site/system.
DELAY time is how long the radio waits for a reply after a squelch break.
Didn't more recent firmware (100/200) and (one would assume the newer 150 also), address this (minimize the housekeeping delay?
I don't think it's "2 seconds" anymore....
 

sgtcasey

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With trunking, you scan SITES, not individual talk groups.
Your radio will 'listen' to each site's control channel for a channel grant (a transmission) for X milliseconds, then if none, it'll move on to the next. Each "X milliseconds" add up and if you are trying to scan lots of sites, you will certainly miss stuff.
There is a well known adage here: "The more you scan, the less you'll hear".

This is the way! Cut down on the sites you're scanning and you get more stuff.

As a new owner of an SDS150 I noticed if I added stuff using Sentinel it added *all* sites even ones far out of range. So when scanning it would scan *all* sites. I used ARC536 to add stuff and cut down the sites to just the one near me and I get tons more stuff now.
 
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Ubbe

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Assistance please?
The display information are updating maybe 4-5 times per second and between updates it could be 25 channels that doesn't get registered on the display.

You can start a debug logfile and let the scanner do at least one roundtrip around the scanlists and start from the first system again. It's a text file on the SD card that you can compress using zip and attach to your post and we can take a look where the scanner spends time and perhaps are hold up for too long on a single system or frequency. Then you can check by avoiding that system and see if scans quicker thru the rest of the systems and hopefully find a way to solve the slow scanning parts.

  1. Hold down the Avoid button and power on the scanner. Keep holding it until the favorite lists starts to load.
  2. Then go to the scanner menu and choose Setting and you should find a Set Debug Log Mode menu.
  3. Go in there and select SD Card and then exit out to normal scan mode.
  4. Let it scan for a minute or two and then connect the USB cable to scanner and PC and select Mass Storage Mode.
  5. With the Windows Explorer program that handles files, (or just hold down the Windows button and E on the PC keyboard and click on the SD card)
  6. Go into the SD card drive and down into the BCDx36HP folder and into the Debug folder.

/Ubbe
 

J-Wrock

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KK4JW

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Thanks for the responses and help everyone. I think I've tweaked it just about as much as I can. I've went through and turned all of the filters to OFF and noticed a slight increase in speed, or maybe it's just me. I think this is probably about as good as it's going to get and I'm just going to chalk it up to the display not being able to "keep up" with the scanning.

This thing is awesome though, $1000 is a lot of skin for a scanner, but you get a lot of scanner for the money. No regrets!
 

nessnet

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What month is it?
ARC536 lets me toggle them off.

View attachment 200492

I think ARC536 is misleading you, or it does not have an actual 150 profile...
They are greyed out in Uniden Sentinel.

1777253658250.png

And, there are no filters on sites....

1777253857521.png


I'd recommend you use Sentinel.
Or, better yet, the BEST program for editing favorites (and many other things) is ProScan.
 

nessnet

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What month is it?

wtp

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the 150 is not listed, but might work.
 
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