Functional Overview
WFM90D and WFM91D ServiceManual 2-11
CAUTION. DC Power Source
Toavoid possible damage to the instrument circuitry when using a DC power
sourceother than the supplied AC adapter,ensure that the DC source is a
negative-ground11 --18 V system with a negative center lead. The DC source
should be able to provide12 W of power.
DCIN 11-18V
Figure2 -7: WFM90D and WFM91D side panels