Pittsburgh
Conference
MODEL 850 AUTOLOC™ AMPLIFIER ... remarkably sensitive and easy to use George E. Leroi of Michigan State Uni versity is t h e winner of t h e 1 9 7 2 Coblentz Society Award
Remember w h e n it t o o k f a n c y s e t ups a n d endless knob-twiddling o n t u n e d d e v i c e s t o recover n o i s e buried s i g n a l s ? W e l l , f o r g e t ' e m . Use K e i t h l e y ' s w i d e b a n d 8 5 0 AUTOLOCTMAmplifier. No tuning, Jine/battery operation, simplified set-up and automatic locking cir c u i t r y make m e a s u r i n g a l m o s t w a i t less. S i m p l y p l u g in y o u r reference a n d reach f o r signals o v e r 1 0 0 d Β b e l o w noise. W i t h sensitivities from 1 μ ν t o 1 0 0 mV. State-of-theart c a p a b i l i t y , at a l o w , u n f o r g e t table, $ 1 , 9 9 5 . For line o p e r a t i o n only, $1,895. The Model 850's exclusive fea tures i n c l u d e p u s h b u t t o n - s e l e c t e d line f r e q u e n c y n o t c h a n d l o w pass filters f o r i m p r o v i n g signal recovery. The ability to nail very small signals b y h a n d l i n g non-coherent i n p u t s 1 0 0 0 t i m e s f.s. ( u p t o l V ) . A p o w e r f u l reference c h a n n e l w h o s e adaptive circuitry automatically tracks frequency and locks-in sig nals i n 3 s e c o n d s . T h e f l e x i b i l i t y to handle almost any w a v e f o r m
a n d still d e l i v e r 3 7 0 ° calibrated phase a d j u s t m e n t , b u i l t - i n s e c o n d harmonic and quadrature switching w i t h unparalleled accuracy. A n d , warning lightsformonitoring power a n d reference s u p p l i e s . See t h e Keithley M o d e l 8 5 0 A U T O L O C T M perform. Ask your K e i t h l e y Sales Engineer f o r a per sonal d e m o . A n d a free c o p y o f o u r " G u i d e t o Evaluating and Selecting L o c k - i n Amplifiers". Or contact K e i t h l e y Instruments, Inc., 2 8 7 7 5 Aurora Rd.,Cleveland,Ohio44139. (216) 248-0400.
ASK ABOUT OUR GUARANTEED USER S A T I S F A C T I O N SENSITIVITY, F. S. 1 M V to 100 mV D Y N A M I C RANGE 1 0 0 - 120 dB NOISE
