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MENU 9-1 Setting (Before and After INRAD Mod)
Alignment: IF Gain (Procedure from Yaesu Technical Supplement)
1: Turn the transceiver off, then press and hold the FAST and LOCK buttons (near
main VFO knob), and turn the transceiver on again.
2: Push FAST then ENT to get into the menus
3: Connect an RF signal generator to the antenna jack, and inject +8dbu. (this
is +11dbu in some Technical Supplements)
4: Select menu function 9-1, and adjust the main VFO knob for a 1-segment S-meter
deflection
Problem:
There have been a lot of questions
about where to set Menu 9-1, before or after the INRAD Mod ie:
"I just installed the INRAD mod for receiver sensitivity, in my 1000MP
the value of menu 9-1 was set to 9, I lowered it to 7,is that the correct value,
the reason I am asking is the scale on that menu item will go as high as 16,
I bought the rig used and I am not sure what the default value is."
Solution 1:
The Yaesu Technical
Supplement states the following:> Turn
the transceiver off, then press and hold the FAST
and LOCK buttons (near main VFO know), and turn the transceiver on again.
> Connect the RF signal generator to the antenna jack, and inject +8dBu.
Select menu function 9-1, and adjust the main VFO know for 1-segment S-meter
deflection.
Solution 2: Menu
item 9-1 will go as high as 31, not 16. The "default" value is whatever the
factory set it at during final alignment. This will vary among radios
Installation of the INRAD front end mod increases the gain, so you should decrease
menu item 9-1 by 2 or 3 to bring the total gain back to what it was before installing
the mod. Before installation of the mod, you should find a steady signal (like
a local BC station) and note its S-meter reading. After installing the mod,
set menu item 9-1 to the same reading on that steady signal as it was before
the mod.
Another method is, after installing the mod, tune in any signal and set menu
item 9-1 so that the S-meter reading on the main receiver is the same as its
S-meter reading on the sub receiver. Menu item 9-1 only affects the gain of
the main receiver.
73, de Earl, K6SE
Menu 9-1 Settings with INRAD Front End Mod
Question: I have installed the AGC and the Background Noise Reduction mod. I was
curious as to the setting of menu item 9-1 for those of you who have done this
mod as well. Hugh, K7XM
Solution: Every radio settings are going to be different. However the setting on
9-1 has a huge impact on weak signal readability. If you set it too high you
wont hear the weak stations and too low and you will not hear them either.
Here's what I did. I found the weakest station I could find (should be S-0) and
I slowly went up and down with menu 9-1. I believe your original setting was 12,
then I would slowly adjust between 7 and 11 and listen to see when you can
understand the weak station the best (close your eyes while doing this and
ignore the S meter). 73 Douglas KB9GKC
Thanks for your reply and that really did the trick. I ended up setting it to
7... 8 is also possible but after that the band-noise gets "noisy" and this is
unwanted. Now I can confirm what somebody else wrote in the reflector. Sometimes
the signals pop up from nowhere ... This is really amazing. Sometimes it looks
like there is no antenna connected :) Thanks agn. The 1.8 filters are also very
good. Just move the receive audio a few hz down and then it sounds comfortable
again... but with less qrm :) 73 Christian, DL6KAC
VA3CR Note: The Technical Supplement has the following instructions for this
adjustment:
1: Turn the transceiver off, then press and hold the FAST and LOCK buttons (near
main VFO knob), and turn the transceiver on again.
2: Connect the RF signal generator to the antenna jack, and inject +8dBu. Select
menu function 9-1, and adjust the main VFO know for a1-segment S-meter
deflection.
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