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Circle Να. 84 on Readers' Service Card
LOCK-IN AMPLIFIER Includes all the features that make it the truly universal coherent detector. The EMC Model R J B Lock-In provides the user with a regularly manufactured laboratory instrument. Based on the widely accepted design of R. J. Blume, this equipment provides all the required functions of a complete narrow banding system; including: selective amplifiers—phase detector—filter—meter—recorder driver circuits.
TECHNICAL FEATURES SIGNAL CHANNEL
• Internal notch rejection filtering of an unwanted input signal
m Overload indicator • Precision step attenuators, decade and log inter
polation ·- Three switch - selected plug-in tuning networks.
QOO20 • Reference pick-off permits gain calibration
« -a JMBD
Recover useful datafromSIGNALS OBSCURED BY NOISE or BACK GROUND DRIFT from 3 cps to 100 kc — time constants .003 sec. to 30 sec.
The NEW Β r" I J · 2 * f
REFERENCE CHANNEL • Accepts any input waveform • Phase shift with approximate calibration • Fundamental or 2nd harmonic ("2nd derivative")
operation selectable by front panel switch OUTPUT CIRCUIT • Internal time constants —.003 sec. to 30 sec. • Outputs for all standard recorders including sep
arate zero for.non-adjustable potentiometric types • Servo output • Zero suppression up to 5 times full scale • Pen marker circuit activated by momentary front
panel switch • On-off switch for recorders ALSO FOR OPERATING CONVENIENCE & MAXIMUM
TROUBLE-FREE OPERATION • Premium tubes, inci low drift dc amplifier types • Regulated dc on all critical heaters
Circle No. 38 on Readers' Service Card
Full monitoring of signal and reference Self-contained regulated power supply
SIMPLIFIED «LOCK D I A S R A M , 0 „ e c o , 0 B | S
t
REFERENCE CHANNEL
PHASE DETECTOR
"c · VTVM _L/PANETN FILTER ' M ^ METERS
For compute model RJB data sheet write to:
ELECTWONICS,
mTyiSSILES AND
C O M M U N I C A T I O N S , I N C . MEASUREMENT AND CONTROL DIVISION, D e p t . A .
160 EAST THIRD STREET · MOUNT VERNON, N.Y. 10550 · 914-668-3012
7 6 A · ANALYTICAL CHEMISTRY