HP 333A, Техническое руководство

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Model 333A/334A
c. Perform steps j through n of Paragraph 3-19.
d. Repeat steps m and n until no further reduction
n meter indication can be obtained.
e. Observe meter indication for distortion in db.
3-23. DISTORTION MEASUREMENT OF AM RF
CARRIERS. (334A Only)
a. Set NORM - RF SET selector to RF SET.
OBSERVE MAXIMUM INPUT VOLTAGES
AS INDICATED ON REAR PANEL.
b. Connect Input to RF INPUT on rear panel.
c. Adjust SENSITIVITY VERNIER control for O db
meter indication.
d. Perform steps j through n of Paragraph 3-19.
e. Refer to Paragraph 3-20 for manual measure-
ment in percent.
f. Refer to Paragraph 3-21 and 3-22 for automatic
and manual measurement in db.
-24. VOLTMETER MODE.
NOTE
If DBM measurements are to be made,
the DB markings on the METER RANGE
switch must each be lowered by 10.
That is, the DB marking for the O. 3 v
range becomes -10 DBM, 1 v range be-
comes O DBM, 3 v range b10
DBM etc. If the other DB markings are
used, the DBM readings will be 10 DBM
high.
TM 11-6625-1576-15
Section III
Paragraphs 3-23 to 3-27
3-25. The 333A and 334A perform as general purpose
AC Voltmeters when the FUNCTION selector is set
to VOLTMETER position.
NOTE
With the FUNCTION selector in VOLT-
METER position, the SENSITIVITY se-
lector is disabled.
a, Position METER RANGE selector to a range
exceeding the value of the signal to be measured.
b. Connect signal to INPUT terminals.
c. Select a METER RANGE to give a reading as
close to full scale as possible and observe meter
indication.
3-26. OUTPUT TERMINALS.
3-27. In VOLTMETER or SET LEVEL position of the
FUNCTION selector, the 333A/334A can be used as a
low distortion, high gain, wideband preamplifier. A
portion of the meter input (O. 1 v RMS output for full
scale meter deflection) is provided at the OUTPUT
terminal J2. In the DISTORTION position, the distor-
tion is provided for monitoring purposes.
DO NOT EXCEED THE VOLTAGES
LISTED BELOW TO PREVENT BLOWING
FUSE F2:
VOLTMETER.= -1 V RANGE
AND BELOW, AND DISTORTION
ANALYZER, MODE-MAXIMUM
SENSITIVITY.
1. 300 V ABOVE 100 CPS
2. 50 V ABOVE 1 KC
IF LOW FREQUENCIES ARE NOT TO
BE MEASURED, Cl MAY BE REPLACED
WITH A SMALLER CAPACITOR, AND
THE VOLTAGE LIMITS OF F2 MAY BE
RAISED ACCORDINGLY.
3-3