Manhattan displaying incorrect Frequency

[joffaa]

I recently acquired a Manhattan ST350 PVR . (Very happy with it). However when I do an Advance Search (Blind Scan) it finds channels however it displays the wrong Frequency. For Example it states it has found channels on
PAS8 12720H 28066, however I know it has really located channels on 12726H. This happens on most of the transponders listing the wrong frequency. Can anyone help me with this annoying problem?

[Ocean]

It is more likely that the free-running Local Oscillator in your LNB is off by this amount.

Simply 'fool' the Manhattan by changing the LO in the LNB setup field down (? !) by 6MHz and the reported frequency will be correct.

[The Pom]

Hi Joffaa,

I see the same sometimes with my Manhattan, a few hertz either side is not a problem. The smae with my Powtek Blind Scanner. I don't consider it a problem, maybe the more educated on this site will explain the exact reasons behind this marginal incorrect Frequency detail

[VK4BKP]

My Manhatan ST-120 does some absolutely stupid things at times. Get this, I'm pointed at NSS6 and do a scan V pol high band. Instead of using the NSS6 satellite listing I just use the old I804 one and delete all transponders. On a blind scan it doesn't pick up 12731V 27500 7/8, misses it completely but picks up 12722V 30000 5/6 instead (no I'm not pointed at Asiasat3 - not even on a side lobe). Change satellite listing back to NSS6, do a blind scan and this time it does it properly.

Conclusion, it can report fake transponder details for no apparent reason. It is REALLY annoying.

[joffaa]

I also have a St Gold FTA Receiver that I used to run with the same dish and LNB and this displayed correct frequency for everything on PAS8. Must be problem with the Receiver and not the dish/lnb.

[Ocean]

It is possible that the reference oscillator in the Manhattan is out a bit, the problem should still be overcome by adjusting the LO frequency in the LNB setup field.

If the reference oscillator is out a bit then the observed blindscan readout frequencies should have different offsets (regarding innaccuracy) at each end of the L band.

None of these relatively cheap receivers are perfect !