SDS200 no receive / BCD436HP receive

Status
Not open for further replies.

rbuxton

Member
Premium Subscriber
Joined
Mar 28, 2002
Messages
554
Location
Hesperus, CO
I'm here to ask if anyone has an idea about a problem I'm having. I'm using a SDS200 and a BCD436HP using a multi-coupler and a discone antenna. Monitoring a particular site (Smelter Mtn.) on the Colorado DTRS and using the Analyze feature I cannot receive the site info using the SDS200 but I can receive the site info on the BCD436HP.

Why/how could this be?

TIA,

Randy.
 

donc13

Member
Premium Subscriber
Joined
Dec 19, 2002
Messages
1,537
Location
Grand Junction, CO
I'm here to ask if anyone has an idea about a problem I'm having. I'm using a SDS200 and a BCD436HP using a multi-coupler and a discone antenna. Monitoring a particular site (Smelter Mtn.) on the Colorado DTRS and using the Analyze feature I cannot receive the site info using the SDS200 but I can receive the site info on the BCD436HP.

Why/how could this be?

TIA,

Randy.
How far away is the site? What is the range you've set, which service types have you set, etc.
 

Ubbe

Member
Joined
Sep 8, 2006
Messages
10,215
Location
Stockholm, Sweden
using the Analyze feature I cannot receive the site info using the SDS200 but I can receive the site info on the BCD436HP.
You probably need to try the different filter settings and IFX. Having those settings wrong could make it loose reception due to interference from other transmitters. The 436 doesn't have those kind of problems.

/Ubbe
 

rbuxton

Member
Premium Subscriber
Joined
Mar 28, 2002
Messages
554
Location
Hesperus, CO
You probably need to try the different filter settings and IFX. Having those settings wrong could make it loose reception due to interference from other transmitters. The 436 doesn't have those kind of problems.

/Ubbe
IFX cannot be set (Func+IFX). Is there something else you're referring to?

This all seems odd since I am receiving sites that are much farther away, all setting are the same for all sites. Just this particular one is a problem on the SDS200. I've changed to all of the filter settings,,,,,no difference.
 

phask

Member
Premium Subscriber
Joined
Dec 19, 2002
Messages
3,758
Location
zanesville
Do you have NAC assigned? It is ON by default with the 200 and the 536 does not use NAC.

I'm assuming that the programing is the same , same site freqs?
 

rbuxton

Member
Premium Subscriber
Joined
Mar 28, 2002
Messages
554
Location
Hesperus, CO
Do you have NAC assigned? It is ON by default with the 200 and the 536 does not use NAC.

I'm assuming that the programing is the same , same site freqs?
Yes, NAC assigned and whether I'm using NAC or not = same issue.
 

MStep

Member
Joined
May 2, 2005
Messages
2,193
Location
New York City
Do you realize that none of what you mention applies when he has the site locked on analyze?

It would be a wonderful improvement if Uniden could somehow devise a way to monitor a system while the SDS series is in analyze mode. Of course, I am a realist and understand that the SDS series has pretty much reached a dead-end with the loss of Paul Opitz.
 

hiegtx

Mentor
Premium Subscriber
Joined
May 8, 2004
Messages
11,685
Location
Dallas, TX
Same site freqs in both radios.
Have you tried your 436HP Favorites list in the SDS200, & still no reception?

Anything electrical or electronic that is closer to the SDS200 and possibly causing interference?
 

rbuxton

Member
Premium Subscriber
Joined
Mar 28, 2002
Messages
554
Location
Hesperus, CO
Have you tried your 436HP Favorites list in the SDS200, & still no reception?

Anything electrical or electronic that is closer to the SDS200 and possibly causing interference?
Fav lists are similar,,, that's not the problem. I moved the radio off the desk and no change. Next move will be to check the cabling between radio and antenna. I was hoping it would be a filter setting but it's not.
 

Eng74

Member
Joined
Dec 19, 2002
Messages
2,099
Location
Kern County, CA
Try changing the filters on the SDS-200. My 100 picks up trunking fine but the same site with the 200 I have to change the filter settings.
 

Ubbe

Member
Joined
Sep 8, 2006
Messages
10,215
Location
Stockholm, Sweden
Do you realize that none of what you mention applies when he has the site locked on analyze?
Analyze uses the site that is programmed. Apply filter settings to the site that you choose when running Analyze. If it's easier to do, and if the site are set to Global filter, then change filter settings in the main menu, Menu/Settings/Global Auto Filter.

IFX needs to be done at the frequency level. In scan mode do Channel+actual frequency+Channel and then Fn+7. Do that to the frequencies that do not work, the control channel. IFX will then be used whenever that specific frequency are used in the scanner.

/Ubbe
 

hiegtx

Mentor
Premium Subscriber
Joined
May 8, 2004
Messages
11,685
Location
Dallas, TX
Similar does not equal same. If it were me, I’d rule that out as a possibility be using same FLs.
Exactly. Since the OP is hearing other cites, farther away than the one that is not working, that would indicate to me that the problem is not the scanner (the SDS200).
Fav lists are similar,,, that's not the problem. I moved the radio off the desk and no change. Next move will be to check the cabling between radio and antenna. I was hoping it would be a filter setting but it's not.
Since you are hearing more distant sites, but not the one in question, I doubt your issue would be the antenna, unless you are using a directional antenna, such as a yagi, and it is aimed in a significantly opposite point other than your problem site.

This would suggest to me that your issue is in your Favorites list programming, not an issue directly with the scanner. The easiest way to verify this would be to load your 436HP Favorites list in the SDS200, and see if it works. Or, you could simply append the DTRS from your 436HP into a new list and load that in the SDS200 and see if that works. If it does, then you've confirmed that the issue is with your programming, or settings in the list you use for your 200.

Look at the site in question, in the 200's list. Are all of the frequencies the same as what is in the database? If using quick keys, is the key for your problem site enabled? Or does your site share a QK with a Department that is Avoided? Again, since the SDS200 receives sites that are farther away than Smelter Mtn., your issue is in how the list is set up. You've already rulled out issues with interference from other devices by moving the scanner around. And, since you state you are not using location control, that rules out the site having an incorrect location or range setting.
 

rbuxton

Member
Premium Subscriber
Joined
Mar 28, 2002
Messages
554
Location
Hesperus, CO
Thanks tp all for replying. I am quite well versed in the programming of these radios and it is not related to the issue I am experiencing. That said, I have discovered a fix but not the source of the problem. I changed the filter for the Smelter Mountain site to 'Invert' and activated the Attenuator for the site. Of course that reduced the signal strength but the control channel is now being received.

I suppose that means there is some interference to the control channel freq. I'll try to track it down but it's not high on the priority list.

-Randy
 

tvengr

Well Known Member
Joined
Feb 10, 2019
Messages
11,189
Location
Baltimore County, MD
Fav lists are similar,,, that's not the problem. I moved the radio off the desk and no change. Next move will be to check the cabling between radio and antenna. I was hoping it would be a filter setting but it's not.
Similar does not equal same. If it were me, I’d rule that out as a possibility be using same FLs.
I agree with jtwalker 100%. The favorites list for the SDS200 could have an error or difference preventing it from receiving. Program the SDS200 with the BCD436HP favorites list to eliminate the possibility of a programming problem before postulating on all of the other possible solutions. The SDS200 can site NAC where the BCD436HP cannot. Set the SDS200 to ignore site NAC.
 
Last edited:

kb5vjv

Member
Premium Subscriber
Joined
Jul 22, 2012
Messages
5
Location
novi, mi
There are alot of agencies that use dmr, so you may need to get the dmr upgrade.
Also, sucks that you cant chare the scanner and listen at the same time.
But, there is a work around. Take out the batteries and plug in your cable, choose serial, and you can listen to the scanner. If you want to take it with you, just put the batteries back in.
 
Status
Not open for further replies.
Top