Avcom PSA-45D Portable Spectrum Analyzer

© Brooke Clarke,  2011

This battery powered spectrum analyzer covers 950 to 2150 Mhz, i.e. the common satellite to house cable frequencies.  It's commonly used to peak an antenna and ID a specific channel in the sattelite IF band.

The chassis is divided up with the powr supply battery charger on the left and the microwave modules on the right.  

Simplified Block diagram

There is a DC power jack on the back panel that's the same as the one on the PLGR GPS receiver.  Rated for 15 VBDC input at up to a couple of amps.
The Cigarette Lighter Plug (with fuse & LED) to PLGR cable. (CLP-PLGR) should work to power this unit.

Under the access hatch on the rear panel there is provision for two battery packs.  But only the lower pack is installed.  Why the top battery pack? Contact
If the battery is moved from the bottom to the top slot the unit operates in the same way.  Maybe they are in parallel?
There's a red LED on the Power Supply board that's blinking when the front panel switch is off.

There's a DB-9f jack on the rear panel that's for factory use.  Has anyone hacked it? Contact