I have 110, 119, and 118 with 4x1 diseqc switch on DM500s PLI Jade latest image, 110 (DSS Lnb) on port 2 (AB) and 119/118 (LO 10750 lnb linear and circular) on port 3 (BA). SNR on all sats over 90%. Scanned all channels ok. When I change channel from 119 or 118 to go to any 110 channel and then come back to any channel on 119 or 118 the SNR goes below 70 (63-65% that is no siganal) and no picture or sound. I go back to 110 channel its SNR and pic audio is ok. In order to get channels back on 119 and 118 I have to reboot the box or press power button on remote to put the reciever in standby mode (green light off and red light on) and leave it for 30 secs and then press power button the SNR (signal) for 119/118 comes back. But again if I change to any 110 channel same thing happens. I have tried various steps to trouble shoot this but no go. I even tried another switchs and other receivers. Switches are 4x1 DisecQ 2.0. Here is what I have.
118 and 119 lnb 0 22khz Hi/Lo Voltage H/V --> LOF/L 09750 and LOF/H 10750 --> Tone None Diseq Mode Version 1.0 DiseqC Parametter B/A
110 lnb 1 22khz Hi/Lo Voltage H/V --> LOF/L 09750 and LOF/H 11250 --> Tone None Diseq Mode Version 1.0 DiseqC Parametter A/B
I am using legacy sd satellite.xml file.
I have tried using 22khz all settings (hi/lo, On, off) on each one of 118,119 and 110 as well. Switched the physical ports on switches from 2 and 3 to 1 and 4. Increased 0.5 V voltage for 118/119. Check marked Fast DisqC and Repeat. I have ran out of ideas. Seems that once it switches to 110 port gets stuck. I tried even 110 and 119 only setup using both DSS lagacy lnbs same thing was happening, once I go to 110 channel the 119 losses signal and does not get it back until reboot the box or put the box in standby for 30 seconds.. Please help solve this issue. Thanks
plymouth thanks for your response. You said I have many errors in setting, but you did not mention which one's!!! I have DM500s reciever and it is set to work with diseqc switch. I am not using any 22kHz switch, 22kHz is an option in lnb setting which usually works at hi/lo but I have tried other two options On and off as well I am not using dishnetwork dish and lnbs, I am using: DSS circular lnb (non Dish and non DP) with LO 11250 for 110, and Special circular and linear lnb with LO 10750 for 118/119. My setting are given and your suggestion is also same. I have done factrory reset too. All sats were sacnned one by one. All channels scanned and work ok. Will appreciate if any other suggestion is given. thanks. Karigar
There are some circular LNBs that can pick up both 118 and 119. They have a LO frequency of 10750, and you set that as the LNB frequency for both 118 and 119 (not 11250).
Some people used universal LNBs (linear) for 118/119, but there is about 50% loss on 119's circular signals so you need a big dish to get it half ways good. Others have used Invacom type which houses both linear and circular LNBs, but this is not good either since 118 is circular polarity signals (although in the linear Ku band range).
What type of LNB is trying to be used?
If the first type, it should work as mentioned with LO frequency set as 10750 for both 118/119 and both set to the same diseqc port in settings and scanned separately. Also as mentioned above, other switch settings apart from diseqc 1.0 are superfluous, and note a 22khz tone can screw up switching if you have it set on.
The port numbers used on the switch don't matter, as long as the same in the settings. If there is still problems, consider a new diseqc switch. Remember to remove all power (turn off receiver from the rear or unplug) before connecting or disconnecting cables to switches or else you will fry them and they will malfunction for sure.
Plymouth, my 110 is already as you suggested. For 118/119 I am using special lnb which is they say is circular and linear at LO 10750. You have suggested to use LO 10750 and Hi 11250 which is wrong for this lnb. But I still tried your suggestion and I did not get any picture for 118/119 because of the wrong setting of LO. This is also confirmed by Yoshahito that you can not use 11250 for this special lnb for 118/119 used on 33 inch dish. Yoshahito I am using special lnb at LO 10750 for 118/119 sats on 33 inch dish. LNB for 110 is DSS circular at lo 11250. Settings are as given for DM500s. As I said 22kHz usually works at default value of Hi/Lo settings and that is how it is set for me. I have tried to use other two options for 22 kHz to resolve this issue but it din not solve. Actually any option of 22kHz has no effect so I left it to default value of Hi/Lo. Port numbers are set in settings as the lnbs are connected to diseqc switch ports.
Karigar, I am not familiar with your receiver, but the settings you list sound confusing. If you have to set all these different switch settings, see if if there is an "OFF" or "NONE" setting. The only switch settings you should be using is diseqc 1.0 if that is the switch you are using.
The setting should look "something" like this:
110. lnb type standard/single lnb freq 11.250 diseqc port 2
119 lnb type standard/single lnb freq 10.750 diseqc port 3
118.7 lnb type standard/single lnb freq 10.750 diseqc port 3
If you have another NEW switch you can try that too, but remember to turn OFF the receiver on the back before swapping it out (turning off on the front of receiver is not good enough).
Yoshahito thanks. Yes that is how I have it. Dreambox has three screens to set an lnb. I have turned OFF the 22kHz. As I said earlier any option of 22kHz has no effect. So from default Hi/Lo I turned it OFF. I have used three switches (one brand new) and three brand new receivers so far and even setup of ONLY 110 and 119 using two DSS LNBs at LO 11250. But this issue is did not solve. I am inclined to believe it is either Switch or Box issue, more likely box issue, as it is cloned Chinese DM500s not original, unless some one out there tells me otherwise and points to the right setting and who has expereinced similar issue and has resolved it.
You can rule out some issues by testing the switch inside in your living room if you have an extra LNB. Connect short cable from receiver to switch and connect LNB to the ports you want to test. (Again remember no power on while connecting/disconnecting). Port 1 is the switch default port. Connect LNB to port 2, turn on receiver and try to switch to port 2. If signal strength pops up, it has switched. Turn off receiver and repeat test for other ports. Note too, If you see signal strength before sending command to switch from empty default port 1, the switch is shorted also.
You mention too other receivers. If you have another receiver connected to one or more of the LNBs at the same time as this problem one, you may be having a ground problem, which can also cause switches to malfunction.
118 LNBs are often sold as Linear/circular. They are really pure circular LNBs usable with low LNB frequency. The settings given by Yoshahito are the ones which I have always used for the past 3 years. No question of using 22Khz and no other confusion. Oh!, I forgot to mention that I always used 118/119 on port 1 input of the DisEqC, but it does not matter if you use port 3 or 4.
I have had to set DiseqC to 1.1 off and on. There was a genuine documented reason which I forget. I have used LNB freq setting as Universal 9750-10750 to pull in over 64 transponders on a blind scan, but on the whole I prefer a setting of LNB freq 10750 or 10600 for 118 and a separate scan of 119 using LNB freq of 11250. Once, for a friend I had to take the two outputs of a dual output 118/1119 (meant for two receivers) and use them on two ports of DisEqC - this will always work, but is usually unnecessary.
nydas I am using 118/119 linear/circular lnb at LO 10750 and for this lnb you can NOT use LO 11250 for 119 scan. Even if you use scanned channels list and set the LO 11250 for 119 you do not get any picture. LO 11250 only works for DSS circular lnb with LO 11250 but then it will not scan or work for 118 channels. I have tested this. I tried your suggestion of using port 1 of disecq switch for 118/119 and set that in the reciever also but still same thing. Also tried going to disecq 1.1 no difference at all. Changing channels from 118 to 119 is ok only issue is when I go to 110 channel then it does not switch to 118/119 without reboot or doing standby for 30 seconds. Now only thing for me is to try getting expensive switch and/or different reciever thatn DM500s. If any one have had such issue on DM500s and have resolvec it successfully and do not mind helping would be usefull. Thanks for all who have tried to help specially Yoshahito.