Thanks, Peter Vince

Does anyone happen to have a user/operations manual for the Trimble Placer Gold APU unit? This was used in emergency service vehicles to give reliable position information, and has inputs from the odometer and reverse gear select to facilitate position estimation when temporarily out of sight of GPS satellites. I have found a sales specification sheet, and an installation manual on the web, but can't find an ops manual that will describe all the command sequences etc. that can be performed. Thanks, Peter Vince