Measured signal strength level
Signal locks on briefly but keeps dropping out
0-50 = Signal
was detected but not able to lock
0 = No signal
Signal level refers to the Dish 6000 indicator which measures the signal
quality based on percentage of errors. As long as the indicator stays above
48-50%, the signal will lock. I assume that if you have over 50% errors, the
Dish 6000 does not have enough good signal to decode properly. A reading of
100% would indicate no errors in signal. I have found that at 47% I will see
pixelation in the picture and below 46% the picture will drop out completely.
printing, click on image to bring up a separate page containing just
Test #1, Date: 1/19/02
- The coax balun improved the bandwidth of antenna. I tried a shorter
5.25" coax to see if it improved upper channels, but overall the
results were not as good as the 6.50" balun. Next test will include a
7.75" coax balun. I did not include the Blake balun in this test, but
with it ch 31-36 would not come in at all and the signal levels were lower
on other channels. I will include the Blake balun in the next test.
- The Low Noise Amp (LNA) increased signal quality in almost every case. The
amp may be overpowering some channels as can be seen in the higher signal
readings using the 6 db attenuator.
- This is also the first time I have ever gotten a locked signal on ch 53. I
could only lock the channel long enough to save it in the setup menu. When I
tune in to the channel through the guide, I get a signal of 42-45 that lasts
about 3-5 seconds, but I never see a picture. This at least gives me a new
target to shoot at.
Test #2, Date: 1/20/02
- The Blake PCB balun was included in this test. Overall it did not work as
well as the coax baluns.
- I tried three different coax baluns, 5.25", 6.50", and
7.75". These 4:1 baluns will convert the 300 ohm feed from the pickup
element into 75 ohm.
- The 7.75" coax balun seemed to be the best match for this antenna, as
can be seen by the increased signal quality in the upper channels and a
decrease in the lower channels. Since this antenna is intended to improve
upper channels, I did not mind sacrificing the lower channels a little. I
will try a longer balun next (maybe 9.00") to see if the upper channels
can be improved even more.
- The LNA seemed to work best overall with a 6db attenuator placed inline at