Ericsson RX8200

[3virgul14]

Hello people, good day

I have a specific issue, one of my equipment is an Ericsson Rx8200, does anyone know how to tune to frequencies below 5.000 SR ?

Like the following one :
Amos 3-7 (4.0 W) 11292 Horizontal 2499,463 5/6 DVB-S2/8PSK (4:2:0) HUN-004 Enc2, my other receivers get this but cant lock it with Ericsson.

 

[moonbase]

Hello people, good day

I have a specific issue, one of my equipment is an Ericsson Rx8200, does anyone know how to tune to frequencies below 5.000 SR ?

Like the following one :
Amos 3-7 (4.0 W) 11292 Horizontal 2499,463 5/6 DVB-S2/8PSK (4:2:0) HUN-004 Enc2, my other receivers get this but cant lock it with Ericsson.

There is a licensing option called LSYM, this controls the symbol rate range.
This will need to be enabled to get the receiver to accept an SR lower than a certain value?
If you check your web interface for control of the RX8200 there is a tab that displays the licensing options that are enabled/disabled in your specific RX8200.

If your LSYM does need to be enabled to use SR's below 5000 you might have difficulty in getting it enabled.
I am not sure if MediaKind will provide licensing support for some of the older RX8200 range, especially if they are end of life?

.

 

[3virgul14]

Hey @moonbase
Thanks for that info, I actually have it enabled.

Feature	License State
RX8XXX/SWO/DVBS2/QPSK	Enabled
RX8XXX/SWO/DVBS2/8PSK	Enabled
RX8XXX/SWO/DVBS2/LSYM	Enabled

Would it be any setting to utilize this?
In the FREQ section, the help pop-up for symbol rate shows 1-60 mbits for the range, but if I enter anything below 5.000 than the searh range option changes to alower number, hence no signal..

 

[moonbase]

The search range should ony define how wide the receiver searches for the carrier around the frequency you have entered.
My understanding of how it works is that if you have entered 10968MHz and have search range of 2500KHz the receiver will only search 1.25MHz either side of your nominated frequency.
That is a total width of 2.5MHz, spread either side of the frequency.

You could try stepping the frequency up and down in 0.5MHz units and see if it gets a lock.
Remember, you have to Apply and Refresh the settings each time you make a change to implement them in the RX8200.

Also, what happens if you change the Seach Mode from Auto to another value, possibly Manual, does this allow manually setting the search range back up to a higher width?
I am not logged in to an RX8200 at the moment to check out the menu options otherwise I could check.

 

[3virgul14]

The search range should ony define how wide the receiver searches for the carrier around the frequency you have entered.
My understanding of how it works is that if you have entered 10968MHz and have search range of 2500KHz the receiver will only search 1.25MHz either side of your nominated frequency.
That is a total width of 2.5MHz, spread either side of the frequency.

You could try stepping the frequency up and down in 0.5MHz units and see if it gets a lock.
Remember, you have to Apply and Refresh the settings each time you make a change to implement them in the RX8200.

Also, what happens if you change the Seach Mode from Auto to another value, possibly Manual, does this allow manually setting the search range back up to a higher width?
I am not logged in to an RX8200 at the moment to check out the menu options otherwise I could check.

To be honest I tried many ways to solve this mystery with no success, playing with auto- manual - spectral senses, mapping mode, roll off, gold seq.. Could not find the trick..I will try again with fixed frequencies from satellites

 

[moonbase]

Have you tried stepping up and down the frequency in 0.5MHz steps?

 

[3virgul14]

Have you tried stepping up and down the frequency in 0.5MHz steps?

I have tried with 1.0Mhz steps before ,no help.. can also try with 0.5Mhz steps.

 

[moonbase]

I will try an RX8200 to see if I can get one of these carriers to lock where the SR is less than 5000.

 

[moonbase]

A quick check with an RX8200 gets it to lock a carrier with SR of 3780 without any problem.

Just a thought, it might need a link margin value above a certain threshold? For the carrier I locked that is pictured below the link margin was 7.2dB
What link margin did you have for the carriers you were testing?

.

 

[moonbase]

Another one locked with SR below 5000, seems to be working OK?
This one only had 2.8dB Link Margin but still locked OK.

.

 

[Francescone]

Frequency range search has no connection with margin or other settings.
As mentioned above, it is only the up and down range compared to the center frequency in which the RX8200 attempts to lock.
So this is not an issue.
Instead, keep in mind that DVBS2/8PSK with a FEC of 5/6 needs a very strong SNR for locking, no less than 9.5 dB (probably 9.5 is just the minimum signal required).
Are you sure that you have a stronger signal from your dish?
Also, what about your LNB? Low symbol rates requires a very stable local oscillator (mainly a PLL one). If you use a cheap LNB try tuning the RX8200 frequency a little bit upper or lower the real frequency as suggested, because the LNB could suffer by frequency offset.

 

[moonbase]

...Also, what about your LNB? Low symbol rates requires a very stable local oscillator (mainly a PLL one). If you use a cheap LNB try tuning the RX8200 frequency a little bit upper or lower the real frequency as suggested, because the LNB could suffer by frequency offset.

I used an Invacom C120 LNB for the two low SR carriers in the pictures above. This LNB is not PLL, it is DRO.
My guess for the reason the OP could not lock the low SR feed with FEC of 5/6 is that he did not have enough Link Margin dB.

The RX8200 does not have a sensitive tuner, it does not need to be in its broadcaster environment use.
The broadcaster controls the uplink/downlink signal level to be compatible with their studio receive dishes and equipment.

The two consumer hobby grade receivers used by the OP with more sensitive tuners might have just been able to lock the carrier slightly over the margin?
Some dB levels from the OP would be good next time one of these feeds will not lock, they might provide useful info?