Hi everyone I am brand new to FTA but thought I would give it a try. I am having an issue. I am using a SNH-031 Invacom universal single KU LNB I have it setup on a DirecTV 33in by 22in dish. I am planning on getting a bigger dish but since this was already setup I am using it to just try and get familiar with the whole process. I have it attached to a SV-8000hd v2. I am using a Fs-1 first strike meter and am getting high signal and quality on the meter but cant get a signal to lock I have tried rotating the lnb and the dish but just wont lock. Also on the SV-8000hd I am showing no quality at all. Please help
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you have the right idea....some universal LNBs switch between the high and low bands using the 22khz setting but this is not one of them...this LNB switches between the bands using the LNB frequency setting....
TantalusFld seems to be correct here.
But let's not jump the gun or get distracted from the fundamental problem. Tron weighed in with the best advice yet - the receiver needs to be tuned to an active transponder to see that quality meter move. This is frequently an underappreciated step in the process among newcomers, and understandably so since it is a subtle point.
here are the specs....note there is nothing in there about the 22khz switching....pay close attention to the bold red part....if you want to use the low band you set the LNB freq to 9750....if you want to use the high band you set the LNB freq to 10600....22khz setting does nothing as far as this LNB is concerned....
Specifications:
Input frequency
Low Band 10.7 - 11.7 GHz
High Band 11.7 - 12.75 GHz
Output Frequency
Low Band 950 - 1950 MHz
High Band 1100 - 2150 MHz
Noise Figure 0.3dB typ
Gain 50 - 60 dB
Gain Ripple
26MHz bandwidth <+/- 0.5 dB
Low Band <5 dB typ
High Band <5 dB typ
Local Oscillator Frequency
Low 9.75 GHz
High 10.6 GHz
Local Oscillator Phase Noise typ
1kHz -65 dBc/Hz
10kHz -95 dBc/Hz
100kHz -110 dBc/Hz
Local Oscillator Stability
(including Setting, aging and +/-1 MHz typ temp. drift) +/-2 MHz max
Current Consumption 185mA typ
Image Rejection >40 dB
Isolation
Cross polar isolation >20 dB
High to low band isolation >25 dB
Two tone 3rd order intercept point (output) >15 dBm
Output Connector Female f type
Impedance 75 Ohm
Return Loss >10 dB
Operating temperature -40 °C to 70°C
Storage temp range -40 °C to 70°C
Power Supply 13 - 17v
Then how are you going to switch between the two local oscillators?? Um...22khz maybe?? If you look closer you will see the two IF ranges overlap...only one oscillator can be used at a time. So you must choose the proper LO, and the 22khz signal has been adopted for use with universal LNB's for more than a few years. The universal LNB setting automatically chooses whether the 22khz signal is on or off according to the frequency selected, but as stated above it can be selected manually if desired.
I hate to be harsh but I think it would be wise to learn some satellite fundamentals before arguing with people who have been in the satellite industry for a couple of decades....
My understanding of the "universal lnb" is that the low band will get you 10.7 - 11.7 ghz satellite service that is not used on most sats receivable here in the US. We use the high band only 11.7 - 12.2 . You can get some TP's no mater what you put in for local oscillator. 9750, 10600 or even 10750, but the frequency's will scan in incorrectly. Most receivers have a universal lnb setting somewhere in the setup menu. This will scan the low band first, and then the RECEIVER, not the lnb, switches to the high band by turning on 22k at this point in the scan. You can save scan time by selecting 10600 with 22k on at all times in the setup menu rather than using the "universal" setting. Check out these specs right side column you will see 22k is used. http://www.invacom.net/documents/Single.pdf
Jim
Jim
three decades here...and im sorry but you are incorrect here
first of all the IF ranges do NOT overlap as you say....the low band is 10700 to 11700....the high band is 11700 to 12750....i wouldnt call that overlapping....
the reason why they make LNBs like this that use the LNB frequency to switch between the bands instead of using the 22khz is so you are able to use a 22khz switch if you choose to or need to do so....
if your using a universal LNB that uses the 22khz setting to switch bands then you can not use a 22khz switch if you needed to....
as i said SOME universal LNBs switch bands with the 22khz setting but this particular LNB is NOT ONE OF THEM!
Mikey11 said:three decades here...and im sorry but you are incorrect here
first of all the IF ranges do NOT overlap as you say....the low band is 10700 to 11700....the high band is 11700 to 12750....i wouldnt call that overlapping....
the reason why they make LNBs like this that use the LNB frequency to switch between the bands instead of using the 22khz is so you are able to use a 22khz switch if you choose to or need to do so....
if your using a universal LNB that uses the 22khz setting to switch bands then you can not use a 22khz switch if you needed to....
as i said SOME universal LNBs switch bands with the 22khz setting but this particular LNB is NOT ONE OF THEM!
Sorry, Mikey11.... You are incorrect. 22KHz tone is used to switch between high band and low band on the Invacom SNH-031 and SNF-031 Universal type LNBFs.
The correct set-up for this type of Universal type LNBF with LO frequencies 9750/10600 is to select Universal 1 type LNB in the receiver. The receiver then automatically sends the 22KHz tone if a TP frequency above 11.7GHz is selected to select the High band output of the LNBF.
If a user is not working a satellite with low band transponder frequencies, then set the LNBF type to Standard or Single, set the LO frequency to 10600 and 22KHz ON. This setting will produce faster Blind Scans as the receiver will not scan frequencies that are not used on that satellite.
Btw... SatelliteAV was the first North American Invacom distributor and we developed the QPH-031 and QPF-031 with Invacom. We do know the product line.
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Output Frequencythree decades here...and im sorry but you are incorrect here
first of all the IF ranges do NOT overlap as you say....the low band is 10700 to 11700....the high band is 11700 to 12750....i wouldnt call that overlapping....
Low Band 950 - 1950 MHz
High Band 1100 - 2150 MHz
Sorry dude...they overlap....
A receiver tunes L band frequencies...not C or KU microwave frequencies. This LNBF has L band converted output from 950 to 2150 in TWO SEPARATE bands chosen by selecting the appropriate local oscillator...using 22khz..
I have owned several of them....
Whew! Thank you AC and Glorystar. I was starting to think I had it wrong not having been in here for decades, but only months, thought I would have to Man Up for being wrong. You guys saved me!
output frequency has nothing to do with IF ranges....
boy do you have alot to learn....
Mikey you're wrong...
a Universal to flip to the high band has to turn the 22k on...
I guess 4 years ago when I said this I must have been wrong then
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a Universal to flip to the high band has to turn the 22k on...
I guess 4 years ago when I said this I must have been wrong then
SatelliteGuys.US - View Single Post - The tip of the Iceberg
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