I noticed something interesting a few days ago, when I was outside trying to aim my "new" Primestar dish, that I rescued out of a trash transfer station.
I was using my Channel Master 1071FD meter, which is the single lnb version of the dual JVI 10-DSM1 meter
Sadoun sells. I was a bit annoyed because I was trying to hit AMC3, but the meter didn't seem to be seeing a peak signal on AMC3, even though it was seening peaks for the sats on either side. I was able to find the sat eventually, anyway, even though for some reason the meter wasn't seeing it.
However when moving the dish around trying to peak, after I had found the sat, I noticed that when I wasn't aimed properly, the little 22khz light would be blinking on my meter, but when aimed properly, it stopped blinking. I thought about this for a minute, and it finally dawned on me that I had the receiver set to DiseqC port 3, since I was running the coax from this dish over to an unused port on the
DiseqC switch on my Fortec dish. Since the DiseqC signals are modulated on a 22khz tone, it was activating the 22khz light on my meter.
Apparently what happens, is when you tune to a channel on a sat setup using a DiseqC port, that the receiver (I was using my Fortec Lifetime) will send DiseqC commands to the switch every couple seconds, causing the light to blink on and off, but once you get a lock on the channel, it assumes that the switch has been activated, and it stops sending the commands, so the blinking stops. Then, if you later lose lock, it starts sending DiseqC commands once again.
So what I found, was that even though the meter wasn't responding properly with respect to a signal strength reading (I have no idea of why not), you can still get an indication of where to aim the dish by watching the 22KHz light. Ie if I slowly raise the dish toward the proper aim, the light stops blinking when it gets a lock, then as I raise it even further, it loses lock and starts blinking again. The proper aim would be mid way between these two points where the blinking stopped/started. Same thing when moving azimuth.
Anyway, a weird way to use a meter, but it seems to be a way of locating a sat from a specific transponder, even when you aren't getting a signal strength reading from your meter..... provided that your meter has a 22khz light as this meter does.
Linear Mode
