Front End Filter Alignment on APX

[dxon2m]

I have a R2670 and am trying to perform front end filter alignment on my APX. I set a test signal with no modulation at -14dbm at the lowest test frequency and the RSSI number barely spiked. The tuner complained check input rf signal. I tried the highest frequency and the tuner was able to perform auto tune but only when it is at 0dbm. I was connected to the GEN out port of the analyzer.

any idea why this is happening

[guy being a guy]

Just an FYI to check on your monitor......
BOTH the generator out AND the RF ANTENNA ports ( BNC connectors ) are fused.
Simply unscrew the BNC and check the little green pico fuses.
They are like 1/16 amp or something very small.

[escomm]

Is this a legit radio or an ALT radio? I've seen ALT radios do real funky things when tuning the FEF.

[dxon2m]

Just an FYI to check on your monitor......
BOTH the generator out AND the RF ANTENNA ports ( BNC connectors ) are fused.
Simply unscrew the BNC and check the little green pico fuses.
They are like 1/16 amp or something very small.

You were right! Whadayaknow!

I actually had another 2670 and all is well now.

[resqguy911]

Just an FYI to check on your monitor......
BOTH the generator out AND the RF ANTENNA ports ( BNC connectors ) are fused.
Simply unscrew the BNC and check the little green pico fuses.
They are like 1/16 amp or something very small.

Now that is the kind of help we need around here! Good post

[motorola_otaku]

Just an FYI to check on your monitor......
BOTH the generator out AND the RF ANTENNA ports ( BNC connectors ) are fused.
Simply unscrew the BNC and check the little green pico fuses.
They are like 1/16 amp or something very small.

250 mA on my R2590.

If you value the life of your monitor, do not replace these with higher-amperage fuses. They are there to protect the generator and receive circuitry from overload should you accidentally key a radio into them, or hit them with a strong near-field RF source.