Need info SM2150

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KB9LR
Posts: 3
Joined: Sat Dec 17, 2005 11:07 pm

Need info SM2150

Post by KB9LR »

Have a inhereted a telemetry system with SM2150s. Can these be programmed narrow band? Need a layout of the pots and functions, especially dev. On a narrow band freq. and one radio had 6kc dev. Need specs and info. Thanks
k2hz
Posts: 150
Joined: Sun Jan 30, 2005 1:02 pm
Location: Rochester, NY

Post by k2hz »

The SM2150 is capable of wide or narrow band but the "narrow band" is for 6.25 KHz synthisizer steps so it is not compatible with the new FCC 7.5 KHz channels.

I have a programming manual and some notes on service adjustments but not a complete manual. Here is some info that may be of help to you:

RV402 is the audio deviation adjustment control

RV403 is the PL deviation adjustment

RV101 is the deviation balance control for DPL and PL.

When the radio is programmed for the default "S" (wide band) channel spacing the synthisizer will acccept frequencies divisible by either 5 or 6.25 KHz. If "N" (narrow band) channel spacing is selected, the synthisizer will accept only frequencies divisible by 6.25KHz.
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