Meter Range - HP 333A Operating And Service Manual

Section Ш
пеене RE DETECTOR
MAX INPUT VOLTAGE 40 VOLT P-P AC
OR 40 VOLT PEAK TRARSENT
333A/2544-C-Q3854
j 334A ONLY
LINE switch turns instrument ac power on.
Pilot lamp glows when instrument is turned ON.
(2)Meter indicates distortion or voltage level of
input.
(3) море switch selects MANUAL or AUTOMATIC
bridge tuning operation.
(4) FREQUENCY RANGE switch selects frequency
range which corresponds to fundamental of input
signal.
(5)COARSE BALANCE control provides coarse ad-
justment for balancing the Wien bridge circuit.
(6) FINE BALANCE control provides a vernier ad-
justment for balancing the Wien bridge circuit.
(1) Frequency dial tunes the Wien bridge circuit to
fundamental of input signal.
(8) HIGH PASS FILTER switch inserts or bypasses
HIGH PASS FILTER in SET LEVEL and DIS-
TORTION function. When inserted, filter pro-
vides > 40 dB attenuation to 50 - 60 Hz hum
components but no attenuation to frequencies
over 1 kHz.
OUTPUT connectors provide means of monitor-
ing output of meter circuit.
(10) Frequency vernier provides fine adjustment of
frequency dial.
METER RANGE switch selects full scale range
of meter in percent, dB and rms volts.
Model 333A/334A
METERS JANGE
547 LEVES
CAUTION!
(12)sENSITIVITY selector provides 0 - 50 dB attenu-
ation of input signal in 10 dB steps in SET LEVEL
and DISTORTION functions.
(IS)SENSITIVITY VERNIER control provides fine
adjustment of sensitivity setting.
Mechanical zero adjust provides mechanical
zero adjustment of meter.
FUNCTION switch selects type of operation of
instrument.
(16) shorting bar connects circuit ground to chassis
ground.
INPUT terminals provide connections for input
signal.
(18) NORM RF DET (Model 334A only) selects front
panel INPUT or rear panel RF INPUT connector.
(9) RF INPUT connector (Model 334A only) provides
input connection for AM RF carrier input signal.
FUSE provides current overload protection for
instrument circuits.
(21) Line voltage switch sets instrument to
operate from 100 V/120 V/220 V/240 V.
(22) Ac power connector provides input connection
for ac power.
Figure 3-1. Front and Rear Panel Description
3-0