HP 339A User's manual

HP 339A User's manual
 OPERATING AND SERVICE MANUAL
MODEL 339A
DISTORTION MEASUREMENT SET
Serial Numbers: 1730A00266 and Greater
IMPORTANT NOTICE
This manual applies directly to instruments with serial number shown
on this page. H changes have been made in the instrument since this
manual was printed, a "Manual Changes” supplement supphed with
this manual will define these changes, Be sure fo record this information
in your manual. Backdating information contained in Section VII
adapts this manual to instruments having serial numbers lower than
those shown on this page.
WARNING
To help minimize the possibility of electrical fire or shock
hazards, do not expose this instrument to rain or excessive
molsture.
Manual Part No. 00339-90001
Microfiche Part No, 00339-90051
Copyright Hewlett-Packard Company 1977
P.O. Box 301, Loveland, Colorado, 80537 U.S.A.
Printed: April 1978
Model 339A
Section |
SECTION |
GENERAL INFORMATION
1-1. INTRODUCTION.
[-2, This Operating and Service Manual contains
information necessary to install, operate, test, adjust, and
service the Hewlett-Packard Model 339A Distortion
Measurement Set.
1-3. This section of the manual contains the performance
specifications and general operating characteristics of the
Model 339A. Also listed are available options and
accessories, and instrument and manual identification
information.
f-4. SPECIFICATIONS.
1-5. Operating Specifications for the Model 339A are
listed in Table 1-1. These specifications are the
performance standards or limits against which the
instrument is tested. Table 1-2 lists general operating
characteristics of the instrument. These characteristics
are not specifications but are typical operating
characteristics included as additional information for the
user.
1-6. INSTRUMENT AND MANUAL IDENTIFI-
CATION.
1-7. Instrument identification by serial number is
located on the rear panel, Hewlett-Packard uses a two-
section serial number consisting of a four-digit prefix and
a five-digit suffix separated by a letter designating the
country in which the mstrument was manufactured. (A =
U.S.A; G = West Germany; J = Japan; U = United
Kingdom.) The prefix is the same for all identical
instruments and changes only when a major instrument
change is made. The suffix, however, is assigned
sequentially and is unique to each instrument.
1-8. This manual applies to instruments with serial
numbers indicated on the title page. If changes have been
made in the instrument since the manual was printed, a
yellow “Manual Changes” supplement supplied with the
manual will define these changes and explain how to
adapt the manual to the newer instruments, In addition,
backdating information contained in Section Vil adapts
the manual to mstruments with serial numbers lower
than those listed on the title page.
1-9. Part numbers for the manual and the microfiche
copy of the manual are also listed on the title page.
1-10, DESCRIPTION.
1-11. The Model 339A Distortion Measurement Set
combines a low distortion signal source, a high resolu-
tion distortion analyzer, an rms responding voltmeter
and a VU (volume units) meter in one unit.
1-12. The signal source used in the Model 339A is a
“bridged-T”” oscillator which provides a low distortion
sine-wave signal from 10 Hz to 110 kHz. The output
amplitude is variable from I mV rms to 3 Vrms into a
600 ohm load and is maintained by an amplitude control
circuit which minimizes amplitude variations even when
changing frequency ranges.
1-13. The distortion analyzer section of the 339A
contains a tracking notch filter which is tuned to the
oscillator frequency. The analyzer measures total
harmonic distortion (THD) from 100% full-scale to .01%
full-scale in nine ranges and features both automatic “Set
Level” and automatic “Nulling” to greatly simplify
operation. The Auto Set Level feature automatically sets
the reference levelovera [0 dB range. IH the input signal is
outside this range, a LED on the front panel indicates
whether the INPUT RANGE control setting must be
increased or decreased to be within the “puli-in” range of
the Auto Set Level. The Auto Nulling feature 1s fully
automatic when the 339A internal oscillator is used as the
signal source. When an external oscillator 1s used as the
signal source, an LED on the front panel indicates which
direction the FREQUENCY controls must be set to be
within the Auto Nulling range. Distortion characteristics
of the input signal can be monitored at the MONITOR
OUTPUT terminals with external equipment (oscillo-
scope, voltmeter, spectrum analyzer, etc.) to provide
additional analysis of the distortion products.
I-14, The Model 339A is equippped with an amplitude
modulation (AM) detector which has a frequency
response from 550 kHz to 1.6 MHz. The AM detector
permits the measurement of modulation distortion.
1-15. The 339A contains three active filters, one high-
pass and two low-pass, which enables the user to
eliminate unwanted frequencies and noise to permit
higher resolution measurements.
1-16. The ac voltmeter section of the 339A measures the
rms value of input voltage from 1 mV full-scale to 300 V
full-scale in twelve ranges. In the VU meter mode, the
1-1
Section !
meter response characteristics are changed to those of a
volume units meter.
1-17, OPTIONS.
{-18. The following options are available for use with the
Model 339 À:
Option 907: Front Handle Kit
Model 339A
Option 908: Rack Mounting Kit
Option 909: Front Handle and Rack Mounting Kit
Option 910: Additional Operating and Service
Manual
1-18. Recommended Test Equipment.
1-20. Equipment required to maintain the Model 339A is
listed in Table 1-3. Other equipment may be substituted 1f
it meets the critical requirements listed in the table.
Table 1-1. Specifications,
Fundamental Frequency Range:
10 Hz to 110 kHz continuous frequency coverage in 4
decade ranges with 2-digit resolution, Distortion
analyzer and oscillator are simultaneously tuned.
Distortion Measurement Range:
0.01% full scale to 100% full scale 1-80 dB to O dB) in 9
ranges.
Detection and Meter Indication;
True rms detection for waveforms with crest factor < 3,
Meter reads dB and % THD (Total Harmonic Distortion).
Meter response can be changed from NORMAL to VU
ballistics with a front panel switch,
Distortion Measurement Accuracy:
20 Hz to 20 kHz +1 dB
10 Hz to 50 kHz +1, -2 dB
50 kHz to 110 ktiz +1.5, -4 dB
NOTE
The above specifications apply for harmonics
< 330 kHz.
Fundamental Rejection.
10 Hz to 20 kHz > 100 dB
20 kHz te 50 kHz > 90 dB
50 kHz to 110 kHz > B86 dB
Distortion Introduced by Instrument {input > 1 Y rms)
10 Hzto 20 kHz < -95 dB
20 kHz to 30 kHz < -90 dB
30 kHz to 50 kHz < -85 dB
50 kHz to 110 kHz < -70 dB
Residual Noise (Fundamental frequency setting < 20 kHz, 80
kHz filter in, source resistance << 1 k§} shielded);
< -92 dB referenced to 1 Y.
Input Level for Distortion Measurements.
30 mY to 300 Y rms
(100 mY range minimum)
Input Impedance:
100 КО +1.0% shunted by < 100 pF input High to Low.
DISTORTION
DC Isolation.
Input low may be connected to chassis ground or floated
30 V to reduce the effects of ground iocops on the
measurement,
Auto Set Level
No set ievel adjusiment required. Distortion
measurements are made directly over 10 dB range
selected by input range switch. Two LED annunciators
provide a fast visual indication to change input range for
valid distortion measurement. Correct range is indicated
when both annunciators are extinguished.
Auto Null:
Using internal oscillators: No manual frequency tuning
necessary when using internal oscillator as signal
source. Oscillator frequency controls simultaneously
tune the analyzer.
Using external frequency source: Two LED annunciators
provide a quick visual indication for the operator to in-
crease or decrease the analyzer frequency controls.
When the analyzer is rough tuned to within one least
significant digit of the fundamental frequency, the in-
dicator lights are extinguished and the 332A auto-null
circuitry takes over to provide a fast accurate null
without tedious operator tuning.
Input Filters {usable on all functions):
Low Pass
30 kHz — 3 dB point at 30 kHz, + 2.6 kHz, — 3 kHz.
Provides band iimiting required by FCC for proof-of-
performance broadcast testing.
80 kHz — 3 d point at 80 kHz, + 7 kHz, — 7.9 kHz.
Normaiiy used with fundamental frequencies
< 20 kHz to reduce the effect of higher frequency
noise present in the measured signal,
High Pass
400 Hz - 3 dB point at 400 Hz, +35 Hz, - 40 Hz,
Normally used with fundamental frequencies
> 1 kHz to reduce the effect of hum components in
the input signal.
Monitor Output
Provides scaled presentation of input signal after
1-2
Model 335A
Section |
Table 1-1. Specifications (Contd).
fundamenta! is removed for further analysis using
oscilloscope or low frequency spectrum analyzer.
Output Voltage: 1 V rms £5% open circuit for full
scale meter indication, proportional to meter
deflection.
Output Resistance: 1 kl 5%,
VOLTMETER
Voltage Range:
1 mV rms full scale to 300 V rms full scale
(-80 dB to +50 d8 fuli scale, meter calibrated in dBV
and dBm into 600 1)
Frequency Range:
1G Hz to 110 kHz
Accuracy (% of range setting)
20 Hz to 20 kHz + 2%
10 Hz to 110 kHz + 4%
Detection and Meter Indication
True rms detection for waveforms with crest factor < 3.
Meter reads true rms volts, dB Y, and dBm into 60011.
Input Impedance:
100 к® + 1.0% shunted by < 100 pF input High to
Low.
Monitor Output:
Provides scaled presentation of input signal for further
analysis using oscilloscope or low frequency spectrum
analyzer,
Output Voltage: 1 V rms 15% open circuit for full
scale meter indication, proportional to meter
deflection.
Output Resistance: 1 kf + 5%.
RELATIVE INPUT LEVEL
Provides a ratio measurement relative to an operator
selected reference level with readout directly indB V or
dBm (600 Di.
Voltage range, frequency range, accuracy
specifications, and monitor are the same as in
VOLTMETER mode. tAccuracy Is relative to O dB set level
input.)
OSCILLATOR
Frequency Range:
10 Hz to 110 kHz in 4 overlapping decade ranges with 2
digit resolution. Frequency vernier provides continuous
frequency tuning between 2nd digit switch settings.
Qutput Level
Variable from < 1 mV io > 3 Y rms into 600 £ with 10
dit /step LEVEL control and 10 dB VERNIER adjustment.
OSC LEVEL position on function switch allows a quick
check of oscillator level without disconnecting leads to
device under test.
OFF position on Oscillator LEVEL control provides fast
signal-to-noise measurement capability. Oscillator
output terminals remain terminated in 6000.
Frequency Accuracy.
+ 2% of selected frequency {with FREQUENCY VERNIER
in CAL position).
Level Flatness:
20 Hz to 20 kHz +0,17 dB
10 Hz to 110 kHz +{.2 db
Distortion (= 800 Q load, =3 V output).
10 Hz to 20 kHz
20 kHz to 30 kHz
30 kHz to 50 kHz
50 kHz to 110 kHz
< -95 dB (G,.0018%} THD
< -85 dB {0.0056%) THD
< -80 dB (0.01%) THD
< -70 dB (0.032%) THD
Quiput Resistance:
6000 T 5%
AM DETECTOR
Frequency Range.
Carrier frequencies: 550 kHz to 1.6 MHz.
Moduiation frequencies: 20 Hz to 20 kHz,
Distortion introduced by AM Detector {with 30 kHz filter
switched IN]:
Up to 85% Modulation: <C-36 dB {1.6%} THD
85% to 95% Modulation: <-30 dB {3%} THD -
Input Level
Maximum: 60 V peak
Modulation signal level
2.0 Y rms minimum
10 Y rms maximum
Monitor Output (with modulated RF carrier applied to
AM Detector input)
1-3
Section | Model 339A
Table 1-1. Specificatons (Cont'd).
Distortion mode; Provides scaled presentation of
demodulated input signal after fundamental is
removed.
Voltmeter and Relative Input mode: Provides scaled
presentation of demodufated input signal.
Output Voltage and Output Resistance are the same
as in Distortion mode.
Table 1-2. Typical Operating Characteristics.
GENERAL
Operating Environment: Weight:
Temperature: 0°C to 50°C.
Humidity Range: < 95%, G°C to 40°C.
Net 8.2 kg (18 ibs.); shipping 11.3 kg {25 lbs).
Dimensions:
Storage Temperature:
— 40°C to +65°C.
Power:
100/120/220/240, +b%, -10%, 40 to 66 Hz, 200 mA
max.
426 mm wide x 146 mm high x 442 mm deep (16,75
wide x 5.78" high x 17.4" deep).
Table 1-3. Becommended Test Equipments.
Instrument Critical Specification
Recommended Model
Use
AL Calibrator Frequency:
10 Hz - 110 kHz
Output Level:
1 mv - 300 Y rms
l.evel Accuracy:
+ 2%
Output Impedance:
< 50 0
True RMS
Voitmeter
Frequency Range:
10 Hz - 110 kHz
Voitage Range:
i mV- 10 Vrms
Measurement Accuracy:
+ .5%
Measurement Resolution:
‚1% of fuli-scale
Crest Factor:
= 4
Pulse Output
Amplitude:
10 Y p-p
Pulse Width:
Variable, 1 msec — 10 usec
Repetition Rate:
100 Hz — TO kHz
Pulse Generator
Handwidth;
DE - 2 MHz
Sweep Time;
1 us - 5 sec/div
Sensitivity:
4 V/div.
Oscilioscope
-hp- Model 745A
AC Calibrator
-hip- Modet 746A
High Voltage
Amplifier
-hp- Mode! 3403C
True RMS
Voltmeter
-np- Model B011A
Pulse Generator
-hp- Model 1221A
Oscitioscope
PAT
PT
PT
1-4
Model 339A
Table 1-3. Recommended Test Equipments (Cont'd).
Section I
Instrument Critical Specification Recommended Model Use
Frequency Counter | Frequency Range: -hp- Model 5300A
10 Hz - 110 kHz Counter Mainframe p
Frequency Resolution: -hp- Mode? B302A
.1% of reading Counter Module
Spectrum Analyzer | Frequency Range: -hp- Model 3044 A PA
10 Hz - 330 kHz Spectrum Analyzer
Frequency Resolution:
.1 HZ
input Amplitude:
iv
Dynamic Range.
50 dB
Measurement
Resolution:
+ 1 dB
Minimum Bandwidth:
3 Hz
Tuneable Noteh Frequency Range: -hp- Model 339A p
Filter 10 Hz - 110 kHz Distortion
Notch Depth: Measurement
= -80 dB Set
Low Distortion Frequency Range: -hp- Model 238A PAT
Oscillator 10 Hz - 110 kHz Oscillator
Output Level:
3 V rms into 60C (1
THD:
> -95 dB (10 Hz - 20 kHz)
> -85 d8 (20 kHz - 30 kHz)
> -80 dB (30 kHz - 50 kHz)
> -70 dB (50 kHz - 119 kHz)
DC Digital Input Range: -np- Model 3465A AT
Voltmeter 4 Y de Digital Volimeter
Measurement
Accuracy:
1.1%
Resolution:
01% of full-scale
Resistors 600 (1 Resistive -hp- Accessory No. PA
| Load 110954
E00 Q 1% Metal -hp- Part No.
Film 0698-5405
60 k0 1% Metal -hp- Part No.
Film 0698-5973 p
100 ki} .1% -hp- Part No,
Metal Film 0698-4158
1 ki} 1% -hp- Part No,
Metal Film 0757-0280
P = Performance Test
A = Adjustment Procedures
T = Troubleshooting
1-5/1-6
Model 339A
Section Il
SECTION Il
INSTALLATION
2-1. INTRODUCTION.
2-2. This section of the manual contains information and
instructions necessary to install the Model 339A
Distortion Measurement Set. Also included are initial
inspection procedures, power and grounding require-
ments, environmental information, and packaging
instructions.
2-3. INITIAL INSPECTION,
2-4. This instrument was carefully inspected, both
mechanically and electrically, before shipment. It should
be free of mars and scratches and in perfect electrical
order. The instrument should be inspected upon receipt
for damage that might have occured in transit. If the
shipping container or cushioning material is damaged, it
should be kept until the contents of the shipment have
been checked for completeness and the instrument has
been mechanicaliy and electricaliy inspected. Procedures
for testing the electrical performance of the Model 339A
are given in Section I'V of this manual. If the contents are
incomplete, if there 1s mechanical damage or defect, or if
the instrument does not pass the Performance Tests,
notify the nearest Hewlett-Packard Office. (A list of the -
hp- Sales and Service Offices 18 presented at the back of
this manual.) If the shipping container is damaged, or the
cushioning material shows signs of stress, notify the
carrier as well as the Hewlett-Packard Office. Save the
shipping materials for the carriers Inspection.
2-5. PREPARATION FOR USE.
2-6. Power Requirements.
2-7. The Model 339A requires a power source of 100,
120, 220, or 240 V ac (+5% - 10%), 48 Hz to 66 Hz single
phase. Maximum power consumption 1s 48 VA,
2-8. Line Voltage Selection.
2-9. Before connecting ac power to the Model 339A
make sure the rear panel line selector switches are set to
correspond to the available power line voltage and that
the proper fuse 1s installed, as shown in Figure 2-1. The
Instrument 1s shipped from the factory with the line
voltage and fuse selected for 120 V ac operation.
2-10. Power Cable.
2-11. Figure 2-2 illustrates the standard configurations
used for -hp- power cables. The number directly below
each drawing is the -hp- part number for a power cable
equipped with a connector of that configuration, If the
220 volts 240 Volts
STO-8- 2548
NOMINAL OPERATING RANGE
VOLTAGE - 10%, + 5% of nominal FUSE
100 volts 90 to 105 volts
120 volts 108 to 176 volts 0.95 A
220 volts 198 to 231 volts
240 volts 216 to 257 volts
Figure 2-1. Line Voltage Selection.
appropriate power cable 1s not included with the
instrument, notify the nearest -hp- Sales and Service
Office and the proper cable will be provided.
2-12. Grounding Requirements.
2-13. To protect operating personnel, the National
Electrical Manufacturers Association (NEMA)
recommends that the instrument cabinet and front panel
be grounded. The Model 339A is equipped with a three
8120-135! 8120-1369 8120-1689
125 Y - БА* 250 \М - 6А*
8120-1348
8120-0698
*UL LESTED FOR USE IN THE UNITED STATES OF AMÉRICA
Figure 2-2. Power Cord Configurations.
2-1
Section H
conductor power cable which, when plugged into an
appropriate receptacle, grounds the instrument.
2-14. Bench Use,
2-15. The Mode! 339A 15 shipped with plastic feet and tilt
stands installed and is ready for use as a bench
instrument. The plastic feet are shaped to permit
“stacking” with other full-module Hewlett-Packard
instruments. The tilt stands permit the operator to elevate
the front of the instrument for operating and viewing
convenience.
2-16. Rack Mounting.
2-17. The Model 339A may be rack mounted by adding
rack mounting kit Option 908 or Option 909. Option 908
contains the basic hardware and instructions for rack
mounting; Option 909 adds front handles to the basic
rack mount kit. The rack mount kits are designed to
permit the mstrument to be instalied ina standard 19 inch
rack. |
2-18. ENVIRONMENTAL REQUIREMENTS.
WARNING |
fo prevent electrical shock or fire hazard,
do not expose the instrument to rain or
moisiure,
2-19. Operating and Storage Temperature.
2-20. In order to meet the specifications listed in Table
1-1, the instrument should be operated within an am-
bient temperature range of 0°C to +50°C (+32°F to
+ 122°F). |
2-21. The instrument may be stored or shipped where
the ambient temperature range is within —40°C to
+ 65°C {(— 40°F to + 149°F). However, the instrument
should not be stored or shipped where temperature fluc-
tuations cause condensation within the instrument.
2-2
Model 339A
2-22. Humidity.
2-23. The instrument may be operated in environments
with relative humidity of up to 959%. However, the
instrument must be protected from temperature extremes
which cause condensation within the instrument,
2-24. Altitude.
2-25. The instrument may be operated at altitudes up to
4572 meters (15,000 feet).
2-26. REPACKAGING FOR SHIPMENT.
NOTE
If the instrument is to be shipped to Hewlett-
Packard for service or repair, attach a tag to
the instrument identifying the owner and
indicating the service or repair to be
accomplished, Include the model number and
full serial number of the instrument. In any
correspondence, identify the instrument by
model number and full serial number. If vou
have any questions, contact your nearest ~hp-
Sales and Service Office,
2-27. The following is a general guide for repackaging
the instrument for shipment. If the original container 18
available, place the instrument in the container with
appropriate packing material and seal well with strong
tape or metal bands. If the original container is not
available, proceed as follows:
a. Wrap the instrument in heavy paper or plastic
before placing it in an inner container.
b. Place packing around all sides of the instrument
and protect the front panel with cardboard strips or
plastic foam.
c. Place the instrument and inner container in a heavy
carton and seal with strong tape or metal bands.
d. Mark the shipping container “DELICATE
INSTRUMENT”, “FRAGILE”, etc.
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Model 339A
Section III
SECTION HI
OPERATION
3-1. INTRODUCTION.
3-2. This section contains information and instructions
necessary for operation of the Model 339A Distortion
Measurement Set, Included 1s a description of operating
characteristics, a description of operating controls and
indicators, and functional checks to be performed by the
operator.
3-3. OPERATING CHARACTERISTICS.
3-4, General.
3-5. The Model 339A 1s designed to measure Total
Harmonic distortion (THD) of signals having a
fundamental frequency between 10 Hz and 110 kHz. the
analyzer section of this instrument measures total
harmomc distortion levels from 100% (0 dB) full-scale to
01% {-80 dB) full-scale in nine ranges as selected by the
DISTORTION RANGE control. to simplify operation,
the analyzer section features both automatic “set level”
and automatic “nulling”.
3-6. The Auto Set Level {feature automatically sets the
measurement reference level over a 10 dB V range. If the
input signal is outside this range, an LED on the front
panel indicates whether the INPUT RANGE control
setting must be increased or decreased to be within the
“pull-in” range of the Auto Set Level.
3-7. The Auto Nulling feature is fully automatic when
the 339A internal oscillator 1s used as the signal source.
When using an external signal source, an LED on the
front panel indicates which direction the FREQUENCY
controls must be rotated to be within the Auto Nulling
range.
3-8. The Model 339A includes an AM detector which
has a carrier frequency range of 550 kHz to 1.6 MHz. The
AM detector permits the measurement of THD of a
modulation signal.
3-9. The signal source used in the Model 339A is a
“bridged T oscillator which provides a low distortion
sine-wave signal from 10 Hz to 110 kHz. The operating
frequencies of the oscillator and the analyzer notch filter
are set simultaneously. The output level of the oscillator
is variable from I mV rms full-scale to 3 V rms full-scale
into a 600 £2 load.
3-10. The ac voltmeter section of the Model 339A
measures the true rms value of input voltages from | mV
full-scale to 300 V full-scale in twelve ranges. Frequency
response of the meter section is 10 Hz to 110 kHz.
3-11. True RMS VS Average Responding
Detection.
3-12. Since the 339A employs a true rms converter to
detect the measurement signal, it is less susceptible to
errors than average responding devices. Most average
responding meters are calibrated to indicate the rms
value of a pure sine-wave. When reading a pure sine-
wave, both the true rms and average responding meters
will give the correct indication. However, when reading
complex signals the average responding meter may be in
error. The amount or error depends upon the particular
signal being measured.
As an example; when measuring a square-wave, the true
rms meter will give the correct indication of the rms
value. The average responding meter however, will read
11% high, The average responding meter 1s also affected
by signals with harmonic content. The amount of error
introduced by an average responding meter due to
harmonics 18 dependent upon the relative amplitude,
phase, and order of the harmonic. The third harmonic
usually causes the greatest amount of error. For example,
when measuring a signal with third harmonic content, an
average responding meter can be in error by +5%to -209
depending upon the amplitude and phase of the
harmonic, relative to the fundamental frequency. Due to
the errors inherent In average responding meters, a
distortion analyzer which employs this type of detector
will also be subject to the same measurement errors.
These errors can cause indicated distortion readings to be
as much as 1.3 dB below the actual rms value for certain
combinations of second and third harmonics. The Model
339A 1s not affected by the errors associated with average
responding detectors and will provide more accurate
measurement indications.
3-1
Section 1H
3-13. Turn-On and Warm-Up.
3-14. Before connecting ac power to the 339A, be certain
the rear panel voltage selector switches are set to
correspond to the voltage of the available power line and
that the proper fuse is installed for the voltage selected.
For rated measurement accuracy, the 339A should be
allowed to “warm-up” for at least 15 minutes.
3-15. DISTORTION MEASUREMENT.
Model 339A
3-16. Distortion Measurement Using the 339A
internal Osciilator.
3-17. The Model 339A Distortion Measurment Set is
designed to provide complete capability for measuring
high resolution distortion analyzer and a low distortion
signal source. Figure 3-2 illustrates the fundamental
application of the Model 339A. The figure shows the
equipment configuration and includes an operating
procedure for making THD measurements.
338A DISTORTION
DEVICE BEING TESTED
MEASUREMENT SET
= > |
ahh OBS OSCILLATOR `
^ OUTPUT | A INPUT
Ur UE CT —
и 4
< — a
DISTORTION (-hp- MODEL 11095A)
ANALYZER
INPUT
PRELIMINAR Y ADJUSTMENTS.
a. Set the OSCILLATOR LEVEL control to OFF.
bh. Set the METER RESPONSE switch to NORMai,
с. Setthe ANALYZER INPUT/GND SELECT switch to DiStortion ANalyzer. {Low input connected to chassis ground or floated as
desired.)
d. Set FILTER switches as desired.
e, Connect the 339A DISTORTION MEASUREMENT SET and the device to be tested as shown.
OSCILLATOR ADJUSTMENT.
f. Setthe FUNCTION switch to OSCillator LEVEL and adiust the OSCILLATOR LEVEL and LEVEL vernier controls for the desired
signal level as indicated on the meter. (Change the METER INPUT RANGE switch as necesary to obtain the proper meter range.)
g. Set the FREQUENCY controls and FREQUENCY VERNIER for the desired output frequency. {Use a frequency counter if
frequency is critical)
ANALYZER ADJUSTMENT.
п, Set the FUNCTION switch to DISTORTION.
i. Select the proper input range by turning the METER INPUT RANGE control in the direction indicated by the INPUT RANGE
indicator lights. The proper input range has been selected when the INPUT RANGE control is set to the lowest range which
extinguishes both indicator lights.
i. Adjust the DISTORTION RANGE contro! to obtain an “en-scale” meter indication as near full-scale as possible.
k. Read the amount of total harmonic distortion (THD) in dB by adding the dB figure on the DISTORTION RANGE control and the
dB reading of the meter, or the amount of THD in per-cent is indicated by the meter reading (second or third scale) relative to the
full-scale per-cent figure on the DISTORTION RANGE control.
Figure 3-2. Distortion Measurement Using 339A
internal Oscillator.
3-2
Model 339 À
Section HI
339A DISTORTION
MEASUREMENT SET
TT
—] ODIO isronron
= - ANALYZER
о Фо NAT INPUT
LOAD |
or REQUIRED)
PRELIMINARY ADJUSTMENTS.
a. Set the METER RESPONSE switch to NORMAL.
desired.)
¢. Set the FILTER switches as desired.
ANALYZER ADJUSTMENTS.
e. Set the FUNCTION switch to DISTORTION.
extinguishes both indicator lights.
full-scale per-cent figure on the DISTORTION RANGE control.
b. Set the ANALYZER INPUT/GND SELECT switch to DiStortion ANalyzer. {Low input connected to chassis ground or floated as
d. Connect the 339A DISTORTION MEASUREMENT SET and the device to be tested as shown.
f. Select the proper input range by turning the METER INPUT RANGE contro! in the direction indicated by the INPUT RANGE
indicator lights. The proper input range has been selected when the INPUT RANGE controf is set to the lowest range which
g. Slowty adjust the FREQUENCY controls in the direction indicated by the FREQUENCY indicator lights. The proper frequency
range has been selected when Zoth indicator lights are extinguished,
h. Adjust the DISTORTION RANGE control to obtain an “on-scale” meter indication as near full-scale as possible.
i. Read the amount of total harmonic distortion (THD) in dB by adding the dB figure on the DISTORTION RANGE control and the
dB reading of the meter, or the amount of THD in per-cent is indicated by the meter reading (second or third scaie) relative to the
DEVICE
| BEING
| TESTED
{OSCILLATOR}
OO
нее
CUTPUT
Figure 3-3. Distortion Measurement of an External
Source.
3-18. Distortion Measurement of an External
Source.
Figure 3-3 shows another measurement application. In
this case the Model 339A is used to measure the THD of a
signal source. The figure includes an illustration of the
necesary equipment connections and an operating
procedure for making the measurement.
3-20. AM DETECTOR.
3-21. The Model 339A includes an AM DETECTOR to
permit the user to measure the total harmonic distortion
of a modulation signal on an RF carrier. Equipment
connection and measurement procedures are similar to
those outlined in Figure 3-3 except the input is connected
to the AM DETECTOR input.
3-22. VOLTMETER OPERATION.
3-23. The following procedures outline the operating
procedures for the various voltmeter functions.
3-24. Normal Voltmeter Operation.
3.25. To use the Model 339A as a normal, true rms
voitmeter, proceed as follows:
a. Set the FUNCTION switch to INPUT LEVEL.
b. Set the METER RESPONSE switch to NOR-
MAL,
¢. Set the INPUT/GND SELECT switch to
DiStortion ANalyzer (low input connected to chassis
ground or floating as desired).
Section [ii
d. Set the FILTER switches off (out).
e. Connect the signal to be measured to the
DISTORTION ANALYZER input connectors.
f. Adjust the INPUT RANGE control in the direction
indicated by the INPUT RANGE indicator lights untilan
“on-scale” meter indication, as near full-scale as possible,
is obtained. (Both indicator lights will be off.)
3-26. RELATIVE LEVEL OPERATION.
3-27. The RELATIVE LEVEL FUNCTION permits the
user to adjust the meter gain of the 339A to set a
convenient reference level on the meter (usually 0 dB).
This function is convenient for measuring signal levels
relative to a reference level. To use the RELative LEVEL
FUNCTION, proceed as follows:
a. Set the FUNCTION switch to REtative LEVEL.
b. Set the METER RESPONSE switch to NOR Mal.
c. Set the INPUT/GND SELECT switch to
DIStortion ANalyzer. (Low input connected to chassis
ground or floating as desired.)
d. Set the FILTER switches off (out).
e. Connect the reference signal to the DISTORTION
ANALYZER input connectors.
f. Adjust the INPUT RANGE control in the direction
indicated by the INPUT RANGE indicator lights until an
“on-scale” meter indication is obtained.
g. Use the RELATIVE ADJUST control to set the
meter to the desired reference level.
h. Measure other input levels relative to the reference
just established. Do not change the RELATIVE
ADJUST control.
3-28. Oscillator Level Operation.
3-29. In the OSCillator LEVEL function, the analyzer
inputs and the MONITOR output is disabled and the
339A meter circuit is used to monitor the output level of
the oscillator. To measure the oscillator output level,
perform the following:
a. Set the FUNCTION switch to OSCiilator LEVEL.
b. Set the METER RESPONSE switch to NOR-
MAL.
c. Set the FILTER switches to off (out).
d. Adjust the INPUT RANGE control as necessary to
obtain an “on-scale” meter indication as near full-scale as
possible.
3-4
Model 339A
e, The meter reading, relative to the meter range
selected by the INPUT RANGE control indicates the
output level of the osciliator.
3-30. To adjust the oscillator output to a particular level,
perform the following:
a. Set the FUNCTION switch to OSCiliator LEVEL.
b. Set the METER RESPONSE switch to NOR-
MAL.
¢. Set the FILTER switches to off (out).
d. Set the INPUT RANGE control to the appropriate
meter range for the oscillator output level desired.
e. Adjust the OSCILLATOR LEVEL control and
LEVEL vernier until the desired output level is indicated
on the meter.
3-31. VU MEASUREMENTS.
3-32. To measure volume units (VU), the meter response
characteristics are changed to those of a VU meter by
switching the METER RESPONSE switch to the VU
position. VU measurements can be made in the INPUT
LEVEL or RELative LEVEL functions. Measurement
results are normally read on the dBm 600 ohms meter
scale. Operating procedures for making VU measure-
ments are the same as those listed for Normal Voltmeter
Operation or Relative Level Operation.
3-33. Filters.
3-34. Three 60 dB/decade active filters, one high-pass
and two low-pass, are included to permit the user to
eliminate unwanted frequencies and noise. These filters
may be selected individually or in any combination by
means of the front panel FILTER switch. The
frequencies labeled beside each switch indicate the 3 dB
“roll-off” point of that particular filter.
3-35. Input Ground Select.
3-36. The ANALYZER Low input reference is selected
by the INPUT/GND SELECT switch, When using the
DISTORTION ANALYZER input, the input low is
connected to chassis ground {center switch position) or
allowed to float (right switch position). When using the
AM DETECTOR input (left switch position} the input
low is connected to chassis ground.
To prevent damage to the analzyer input
circuits, do not float the low input terminal
more than + 30 Y de relative to earth ground.
Model 339A
3-37, Monitor Output.
3-38. The MONITOR output provides a means of
driving external equipment to permit a more detailed
analysis of the signal being measured. Instruments, such
as an oscilloscope, wave analyzer, or spectrum annalyzer
can be used to determine the nature of the total harmonic
distortion being measured. The monitor output level is |
V rms for full-scale meter deflection. The MONITOR
output is disabled when using the OSCillator LEVEL
FUNCTION.
3-39. OSCILLATOR OPERATION.
3-40. Frequency Selection.
3-41. The oscillator frequency is determined by the
setting of the FREQUENCY and FREQUENCY
VERNIER controis. The units and tenths controls
determine the first and second digits of the desired
frequency. These numbers are then multiplied by the
range selected on the multiplier control. As an
example: to set the oscillator to a frequency of 5.6 kHz;
set the units control to 5, the tenths control to .6, and the
multiplier to XIK, (The FREQUENCY YERNIER
should be set to the CAL position.) The FREQUENCY
VERNIER provides continuous frequency tuning
between steps of the tenths control to permit continuous
frequency selection from 10 Hz to 110 kHz.
3-42. Qutput Level.
3-43, The oscillator output level 1s controlled by the
OSCILLATOR LEVEL control and LEVEL vernier.
The OSCILLATOR LEVEL control selects output levels
from 3 mV rms full-scale to 3 Vrms full-scale in 10 dB Y
steps (600 ohm load). The level vernier varies the output
ievel from greater than 3 Y rms to less than 1 mY rms (600
ohm load).
3-44. OPERATIONAL VERIFICATION
CHECKS.
3-45. The following procedures are designed to test the
operational capabilities of the Model 339A. If so desired,
these tests can be substituted for the performance tests
outlined in Section 1V for incoming inspection tests orto
check operation after calibration. Keep in mind however,
these tests check only the operational capabilities of the
Models 339A. They do not check the performance
accuracy. If the instrument fails any of the foliowing
tests, refer service to qualified service personnel.
3-46. Preliminary Procedure.
3-47. Before connecting power to the 339A, perform the
following:
a. Be certain that the rear panel VOLTAGE
SELECTOR switches are set to correspond to the
Section 11
available power line voltage and that the proper fuse is
installed.
b. Connect power to the 339A and turn the LINE
switch ON.
c. Set the FILTER switches off {out).
d. Set the METER RESPONSE switch to NOR-
MAL.
3-48. OSCILLATOR.
3-49, This procedure checks the output level of the 339A
oscillator for all frequency settings. Frequency accuracy
is not checked. To check the oscillator proceed as follows:
a. Set the FUNCTION switch to OSClliator LEVEL.
b. Set the INPUT RANGE control to the 10 volt
range.
c. Set the FREQUENCY controls fuliy counterclock-
WISE,
d. Set the OSCILLATOR LEVEL control and level
vernier fully clockwise. The meter should indicate more
than 6 volts.
e. Set the level vernier fully counterclockwise. The
meter should indicate less than 2 volts.
f. Set the INPUT RANGE control to the +10 dBm
range and adjust the level vernier for a 0 dBm meter
indication {blue scale}.
g, While observing the meter, set the FREQUENCY
controls to each dial position. (Allow time {or the meter
reading to stabilize at each setting.) The meter indication
should not vary more than 0.6 dBm from the original
setting,
В. Set the FREQUENCY controls fora frequency of |
kHz,
i. Adjust the level vernier for a meter indication 0
dBm.
j. Simultaneously down-range the OSCILLATOR
LEVEL and INPUT RANGE controls to the next lower
range. The meter should indicate 0 dBm.
k. Repeat Steps 1 and j for each position of the
OSCILLATOR LEVEL control.
3-50. AC VOLTMETER.
3-51. The following procedure checks the ac voltmeter
functions and ranges. Perform the following steps:
3-5
Section Ш
a. Set the FILTER switches off (out), the METER
RESPONSE switch to NORMAL, and the INPUT,
GND SELECT switch to the center position.
(DIStortion ANalyzer with input low connected to
chassis ground.)
b. Set the FUNCTION switch to INPUT LEVEL.
с. Set the INPUT RANGE control to the 10 volt
range. -
d. Set the FREQUENCY controis for a frequency of 1
kHz.
e. Setthe OSCILLATOR LEVEL controitothe 3volt
range.
f. Connect a cable from the OSCILLATOR
OUTPUT terminals to the DISTORTION ANALYZER
input terminals.
g. Adjust the OSCILLATOR LEVEL vernier for a
meter indication of 6 volts.
-— h. While observing the meter, set the INPUT RANGE
control to the 30, 100, and 300 volts ranges. The meter
should indicate 6 volts on the respective ranges. The left
hand INPUT RANGE indicator light should be lit on all
three ranges.
i. Set the INPUT RANGE switch to the 3 voit range.
Observe that the right hand INPUT RANGE indicators
Hit.
j. Down-range the OSCILLATOR LEVEL controito
the next lower range and adjust the level vernier for a
meter indication -10 dB V.
k. Down-range the INPUT RANGE control to the
next lower range. The meter should indicate O dB V + .2
ФВ У.
I. Repeat Steps j and k until all input ranges except the
001 V range have been checked.
т, Set the INPUT RANGE control to the 10 volt
range and the OSCILLATOR LEVEL control to the 3
volt range.
n. Adjust the level vernier for a meter indication of -12
dB Y.
o. Set the FUNCTION switch to the RELATIVE
LEVEL position.
p. Vary the RELATIVE ADJUST controlto verify an
adjustment range of greater-than 10 dB Y.
3-52. Distortion Analyzer.
3-53. The following procedure checks the distortion
3-6
Model 339A
analyzer ranges and distortion measurement capability.
Perform the following steps:
a. Set the FILTER switches off (out), the METER
RESPONSE switch to NORMAL, and the INPUT/
GND SELECT switch to the center position (DIStortion
ANalyzer with input low connected to chassis ground).
b. Set the DISTORTION RANGE control to 0 dB.
с. Setthe INPUT RANGE control to the | volt range.
d. Set the FREQUENCY controls to a frequency oï |
KHz.
e. Setthe OSCILLATOR LEVEL control to the 3 volt
range.
{ Connect a cable between the OSCILLATOR
QUTPUT terminals and the DISTORTION ANALY-
ZER input terminals,
g. Set the FUNCTION switch to the DISTORTION
position.
h. Adjust the OSCILLATOR LEVEL vernier for a
meter indication of -15 dB V.
i. Down-range the DISTORTION RANGE control
to the next lower range. The meter should indicate
approximately -5 dB V,
1. Repeat Steps h and i until all distortion ranges have
been checked.
3-54. Filters.
3-55. The foliowing procedure checks the “roll-off” of
the filters.
a. Set the FUNCTION switch to OSCILLATOR
LEVEL.
b. Set the INPUT RANGE control to the 3 volt range.
с. Setthe OSCILLATOR LEVEL controlto the 3 volt
range and adjust the level vernier for a meter indication of
0 dB Y.
d. Set the FREQUENCY controls for a frequency of
400 Hz.
e. Set the 400 Hz FILTER switch on (in). The meter
should indicate -3 dB Y + 1 dB. Return the filter switch to
off (out).
f. Set the FREQUENCY controls for a frequency of
30 kHz. Readjust the level vernter for a meter indication 0
dB V 1f necessary.
g. Set the 30 kHz filter switch on (in). The meter
Model 339A
should indicate -3 dB V — 2 dB. Return the filter switch to
off (out).
h. Set the FREQUENCY controis for a frequency of
80 kHz, Readjust the level vernier for a meter indication
of 0 dB V if necessary. |
i. Setthe 80 kHz filter switch on (in). The meter should
indicate -3 dB V +2 dB. Return the filter switch to off
(out).
3-56. OPERATOR'S MAINTENANCE.
3-57. Fuse Replacement.
3-58. The ac line fuse is located on the rear panel of the
instrument. Before checking or replacing the fuse,
disconnect the ac line cord from the instrument. The fuse
used in the Model 339A 1s a 250 mA, normal-blow fuse.
| WARNING |
For continued protection against fire hazard,
replace only with the same type and rating of
fuse as specified for the line voltage being
used,
Section III
3-59. Adjustment of Meter Mechanical Zero.
3-60. The meter 1s properly zero-set when the pointer
rests over the zero calibration mark with the instrument
in its normal operating environment and turned off.
Zero-set the meter as follows to obtain maximum
accuracy and mechanical stability:
a. Turn instrument on and alow It to operate for at
least 20 minutes to let meter movement reach normal
operating temperature,
b. Turn instrument off and allow 30 seconds for all
capacitors to discharge.
с. Rotate zero adjustment screw clockwise until
pointer is left of zero and moving upscale.
d. Continue rotating screw clockwise; stop when
pointer 1s exactly at zero.
e. When pointer 1$ exactly over zero, rotate
adjustment screw slightly counterclockwise to relieve
tension on pointer suspension. lf pointer moves off zero,
repeat Steps c through e, but make counterclockwise
rotation less.
3-7/3-8
Mode] 339A
Section IV
4-1. INTRODUCTION.
4-2. This section contains performance test procedures
which can be used to verify that the Model 33%A meets
the specifications listed in Table 1-1. AH tests can be
performed without access to the interior of the
instrument. A simpler operational verification
procedure, included in Section III, may be used to check
the operational capability of the 339A. The operational
procedures do not, however, check specified accuracy of -
the instrument.
4-3. EQUIPMENT REQUIRED.
4-4, The test equipment required for the performance
tests is listed at the beginning of each procedure and in the
Recommended Test Equipment Tabie in Section L If the
recommended equipment is not available, any equipment
that meets the critical specifications given in the table
may be substituted.
... 4-5. TEST RECORD.
4-6. À Performance Test Record is included at the end of
this section for your convenience in recording
performance data. This record may be removed from the
manual and used as a permanent record of the incoming
inspection or of a routine performance test, The
Performance Test Record may be reproduced without
written permission of Hewlett-Packard.
4-7. CALIBRATION CYCLE.
4-8. The Model 339A requires periodic verification of
performance. The performance should be tested as part
of the incoming inspection and at 90 day or 6 month
intervals, depending upon the environmental conditions
and your specific accuracy requirements,
4-9. VOLTMETER PERFORMANCE TESTS,
4-10. The following procedures check the accuracy of the
voitmeter section of the 339A. These procedures should
be performed and the voltmeter accuracy verified before
performing the Distortion Analyzer Performance Tests.
4-11. Full-Scale Accuracy and Frequency
Response Test.
Equipment Required:
AC Calibrator (-hp~- Model 745A)
High Voltage Amplifier (-hp- Model 746A)
AMPLIFIER
e CT) / } { BILE
AC CALIBRATOR
g 0 В {3 g- 0 O O81} {-hp- Mode! 745A)
O СЕ (> |
Led. al III
es 29008
HIGH VOLTAGE
(-hp- Model 746A}
DISTORTION
MEASUREMENT SET
(-hp- Model 339A)
— >
|: 8508
3 9 осетр О © с
Li
Figure 4-1. Full-Scale Accuracy and Frequency
| Response Test,
4-1
Section IV
Table 4-1, Fuli-Scale Accuracy and Frequency Response Test Limits.
Input FREQUENCY
Range
& 10 Hz 20 Hz | 100 Hz | 1 kHz | 10 «Hz | 20 kHz 110 kHz
input
Levei TEST LIMITS
L01V 1.060096 - 00104 00098 - 00102 00086 - 00104
003 V | 00288 - 00312 .00294 - 00306 00288 - 00312
O1 V 0096 - ‚0104 0088 - 0102 ‚0096 - 0104
03 v .0288 - 0312 0294 - 0306 0288 - 0312
AV 096 - 104 098 - 102 086 - 104
3 Y 288 - .312 294 - ‚306 288 - 312
ТУ 96 - 1.04 98 - 1.02 96 - 1.04
ЗУ 2.88 - 3.12 2.34 - 3.06 2.88 - 3.12
10 V 9.6 - 10.4 9.8 - 10.2 9.5 - 10.4
30 V 28.8 - 31.2 29.4 - 30.6 28.8 - 31.2
100 Y 96 - 104 98 - 102 36 - 104
300 Y 288 - 312 294 — 300 288 - 312
a. Set the 339A controls as follows:
FUNCTION ......
FILTERS
INPUT RANGE
«+ EE + 7 + +
+ F + +: + + + +: вов
METER RESPONSE
EEE OEA
INPUT LEVEL
OFF (out)
VU
INPUT/OND SELECT .... DIS. AN./1.
{center position)
b. Set the AC Calibrator controls for an output of
I mV, 10 Hz.
¢. Connect the output of the AC Calibrator to the
339A DISTORTION ANALYZER input.
Model 335A
d. The 339A I mV, 10 Hz meter indication should be
within the Test Limits listed in Table 4-1.
e. Using the AC Calibrator and High Voltage
Amplifier, verify the 339A Voltmeter accuracy for each
Test Frequency, Input Level, and 339A Input Range
Hsted in Table 4-1.
4-12. Meter Tracking and Monitor Output
Accuracy Test.
Equipment Required:
AC Calibrator (-hp- Model 743A)
True RMS Voltmeter (-hp- Model 3403C)
TRUE RMS VOLTMETER
(-hp- Model 3403C)
—
O 0068
> ©
AC CALIBRATOR
(-hp- Model 745A)
DISTORTION —
MEASUREMENT SET то о оо а am
{-hp- Model 339A) © 8 8 8&8 в E
~~ O с Op
| ; . и I CITO MT
E o весе
O
~~: @O®RE e
O e
огр ОО:
| DISTORTION
MONITOR
OUTPUT ANALYZER
input
>>
4-2
Figure 4-2. Meter Tracking and Monitor Output
Accuracy Test.
Model 339A
PULSE GENERATOR ,
Chp- Model 8B011A) | Ÿ
tia af
Of ke
1 O 11130
Jd di O A
= ol cms top
TRUE RMS VOLTMETER
{-hp- Mode! 34036)
OSCILLOSCOPE
(-hp- Model 122181,
{gE Te 3 |
i
o
IO O
L
DISTORTION |
MEASUREMENT SET
{-hp- Model 338A)
—_— ем
AT
>
о ®
—|
ORE
ос" AO ©
7
DISTORTION
ANALYZER
INPUT
€) esesees
AM
A
LES [ Ú
E
o,
Figure 4-3. RMS Accuracy Test.
SPECTRUM ANALYZER
{-hp- Model 3044A)
5
J
7
117
С
DISTORTION
MEASUREMENT SET
(-hp- Model 338A)
090
——
QE |
JO:
Figure 4-4.
Filler Accuracy Test.
Section IV
a. Set the 330A controls as follows:
FUNCTION ............ INPUT LEVEL
FILTERS ....ee0orarenao0eos OFF (out)
METER RESPONSE.....….….….….……... VU
INPUT RANGE «ovens, iv
INPUT/GND SELECT .... DIS. AN./L
(center position)
b. Set the AC Calibrator controls for an output of 1 Y,
I kHz.
c. Set the True RMS Voltmeter to read AC Volts on
the 1 V range.
de Connect the equipment as shown in Figure 4-2.
e. The 339A | V meter indication and MONITOR
output level should be within the Test Limits listed in
Table 4-2.
f. Using the AC Calibrator, verify the 339A meter
accuracy and MONITOR output accuracy for each input
level listed in Table 4-2.
Table 4-2. Meter Tracking and MONITOR Output
Accuracy Tesis.
Monitor
Input Meter Output
Level indication Level
1.0 V 98 - 1.02 ‚95 - 1.05
‚GV ‚88 - 82 ‚85 - ‚95
8 V 78 - 82 ‚75 - 85
TY ‚68 -.72 .85-.75
BV 58 - 62 ‚55 - 65
5 Y ‚48 - 52 45 - 55
AV 38 - 42 35 - 45
‚ЗУ ‚28 - .32 25 - 35
2 V 18 - ‚22 15 - .25
1V 08 - .12 ‚05 - ‚15
/ 4-13. RMS Accuracy (crest factor) Test.
y
Equipment Required:
Pulse Generator (-hp- Model 8011 A)
True RMS Voltmeter (-hp- Model 3403C)
Oscilloscope (-hp- Model 1221A)
a. Set the 339A controls as follows:
FUNCTION ............ INPUT LEVEL
FILTERS .... oot, OFF (out)
METER RESPONSE... ... ool VU
INPUT RANGE css ess eau 00000 ЗУ
INPUT/GND SELECT .... DIS. AN./L
(center position)
4-4
Model 335A
b. Connect the equipment as shown in Figure 4-3.
с. Adiust the pulse generator for a 10 V peak-to-peak
positive pulse with a repetition rate of ! kHz {as observed
on the oscilloscope).
d. Adjust the Pulse Geneator symmetry until the true
RMS voltmeter indicates 3.00 V rms.
NOTE
The pulse generator amplitude and symmetry
controls may interact. Repeat adjustments as
necessary to obtain a true rms meter
indication of 3 V and an oscilloscope
presentation of 10 V peak-to-peak.
e. The 339A meter indication must be 3 volts 6
volts,
f. Change the Pulse Generator repetition rate to 100
Hz. Readjust the amplitude and symmetry as necessary
to obtain a true RMS meter indication of 3 Vanda 10 V
peak-to-peak oscilloscope presentation.
g. The 339A meter indication must be 3 V + .06 volts,
h. Change the Pulse Generator repetition rate to 10
kHz. Readjust the amplitude and symmetry as necessary
to obtain a True RMS meter reading of 3 V and a 10 V
peak-to-peak oscilloscope presentation.
i. The 339A meter indication must be 3 V + .12 volts.
a 4, Filter Accuracy Test.
Equipment Required: ona Ana
Spectrum Analyzer (-hp- Model 3044A)
a. Set the 339A controls as foliows:
FUNCTION .........e.. INPUT LEYEL
FILTERS ..........ee.e. e... OFF (out)
METER RESPONSE............... VU
INPUT RANGE .......eeseverroeos EV
INPUT/GND SELECT .... DIS, AN./_L
(center position) I
b. Connect the equipment as shown in Figure 4-4,
c. Set theSynthesizer (3330B} output frequency to 400
Hz and adjust the output level for a full-scale meter
reading on the 339A.
d. Set the Spectrum Analyzer (3571 A) controls for an
input impedance of | MU , an input range of +10 dB V,a
bandwidth of 3 Hz and a relative display reference.
Model 339A
¢. Set the Spectrum Analyzers measurement reference
by pressing the Enter Offset button. (The Spectrum
- Analyzer should display 00.00 dB.)
f Set the 339A 400 Hz FILTER switch to ON (in).
g. Adjust the Synthesizer frequency until the
Spectrum Analyzer indicates a reading of -3.00 dB. The
Synthesizer frequency must be between 360 Hz and 435
Hz.
h. Set the 339A 400 Hz FILTER to OFF (out).
i. Set the Synthesizer output frequency to 30 kHz.
jj. Set the Spectrum Analyzers measurement reference
by pressing the Enter Offset button.
k. Set the 339A 30 kHz FILTER switch to ON (in).
I. Adjust the Synthesizer frequency as necessary to
obtain a Spectrum Analyzer reading of -3.00 dB. The
Synthesizer frequency must be between 27 kHz and 32.6
kHz.
m. Set the 339A 30 kHz FILTER to OFF (out),
“га
п. Set the Synthesizer output frequency to 80 kHz,
о. Set the Spectrum Analyzers measurement reference
by pressing the Enter Offset button.
p. Set the 339A 80 kHz FILTER switch to ON (in).
g. Adjust the Synthesizer frequency as necessary to
obtain a Spectrum Analyzer reading of -3.00 dB. The
Synthesizer frequency must be between 72.1 kHz and 87
kHz.
r. Set the 339A 80 kHz FILTER to OFF (out).
Section IV
4-15. OSCILLATOR PERFORMANCE TESTS.
4-16. Qutput Level and Flatness Test.
Equipment Required:
“True RMS Voltmeter (-hp- Model 3403C)
600 ohm Resistive Load (-hp- 11095A)
а, Set the 339A controls as follows:
FREQUENCY ......... [kHz (1.0 x 1 K)
FREQUENCY VERNIER .......... CAL
OSCILLATOR LEVEL ............. ЗУ
LEVEL vermier................ fully CW
b. Set the True RMS Voltmeter controls to measure
AC Voits.
c, Connect the equipment as shown in Figure 4-5.
d. The True RMS Voltmeter indication must be
greater than 3 V (typically > 3.4 М).
¢. Adjust the 339A LEVEL vernier for a reading of
3.00 V as indicated on the True RMS Voltmeter.
f. Set the 339A to each FREQUENCY listed in Table
4-3 and verify that the output level is within the limits
specified.
4-17. Quiput impedance Test.
Equipment Required:
True RMS Voltmeter (-hp- Model 34030)
600 ohm Resistive Load (-hp- Model 11095A)
a. Set the 339A controls as follows:
FREQUENCY ......... kHz (10x 1 K)
DISTORTION
MEASUREMENT SET
{-hp- Model 338A)
AIT >
IN ¿SOBVDE
3 9 05=30 OF
С
TRUE RMS VOLTMETER
{-hp- Model 3403C)
O
ROO O je
A 600 8 LOAD
(-hp- 11095A)
Figure 4-5. Oscillator Quiput Level and Flatness
4.5
Section IV Model 339 A
DISTORTION
MEASUREMENT SET
(hp- Model 339A) TRUE RMS VOLTMETER
— > {-hp- Model 3403C)
] . .
|: @@®QE
= | О О 06
О wm ©
3 ÿ Yao @ O fo :
À 600 N LOAD
DA {-hp- 110954)
Figure 4-8. Oscillator Cutput impedance Test.
FREQUENCY VERNIER .......... CAL Frequency Counter (-hp- Model 5300A Mainframe,
OSCILLATOR ..rinooreoaresreree. 3 Y 5302A Frequency Module)
600 ohm Resistive Load (-hp- 11095A)
b. Connect the equipment as shown in Figure 4-6
(without the 600 ohm load). | a. Set the 339A controls as follows:
cc. Adjust the True RMS Voltmeter controls to FREQUENCY .......... 10 Hz (1.0 x 10)
measure AC volts on the 10 V range. FREQUENCY VERNIER .......... CAL
OSCILLATOR LEVEL ............. 3V
d. Adjust the 339A LEVEL vernier control to obtaina
reading of 6.00 V on the True RMS voltmeter. Table 4-3. Oscillator Qutput Limits (Fiatness Test).
e. Disconnect the cable from the True RMS Voltmeter
and install the 600 ohm load as shown In Figure 4-6. Output Output
| Frequency Level
f. The True RMS Voltmeter reading must be between
2.927 and 3.077 V rms. 10 Hz 2.930 - 3.070
20 Hz “2.965 - 3.035%
100 Hz 2.965 - 3.035
4-18, Osciliator Frequency Accuracy Test. 10 kHz 2 985 - 3.035
| 20 kHz 2.965 - 3.035
Equipment Required: 110 kHz 2.930 - 3.070
DISTORTION
MEASUREMENT SET
{-hp- Model 339 A}
—. >>
E ODIO
9 O" О Ор
<
FREQUENCY COUNTER
t-np- Modei E300A Mainframe)
{-hp- Model 5302A Frequency Module)
CS
010 Or)
600 О LOAD
{-hp- 11095A)
Figure 4-7. Oscillator Frequency Accuracy Test.
4-6
Model 339A
Table 4-4. Oscillator Frequency Accuracy Test.
339A
| Frequency Frequency Frequency Counter
Range Indication {Period)
Setting
10 Hz 102.04 mSec. - 98.04 mSec.
20 Hz X10 51.020 mSec. - 49.019 mSec.
50 Hz 20.408 mSec, - 19.608 mSec.
100 Hz 10.204 mSec. - 9.803 mSec.
190 Hz 10,204 mSec. - 9.803 mSec.
200 Hz X 100 5.1020 mSec. - 4.8019 mSec.
500 Hz 2.0408 mSec. - 1.9608 mSec.
1 kHz 1.0204 mSec. - 9803 mbec.
1 kHz 1020.4 uSec. - 980.3 uSec.
1.1 kHz 927.64 uSec. - 891.26 uSec.
1.2 kHz 850.34 uSec. - 816.99 „Sec.
1.3 kHz 784.93 „Sec. - 754.14 uSec.
1.4 kHz 728.86 uSec, - 700.28 uSec.
1.5 kHz 680.27 uSec. - 653.59 „Sec,
1.6 kHz 637.75 uSec, - 612,74 uSec.
1.7 kHz 600.24 uSec. - 576.70 uSec.
1.8 kHz X IK 566.89 uSec, - 544.66 uSec.
1.9 kHz 537.05 uSec, - 515.99 uSec.
2.0 kHz 510.20 uSec. - 490.19 uSec.
3.0 kHz 340.13 uSec. - 326.79 ибес.
4.0 kHz 255.10 uSec. - 245.09 uSec.
5.0 kHz 204.08 uSec. - 196.08 uSec.
8.0 kHz 170.06 uSec. - 163.39 “Sec.
7.0 kHz 145.77 uSec. - 140,05 uSec.
8.0 kHz 127.55 uSec. - 1272.54 „бес,
9.0 kHz 113.37 uSec. - 108.93 uSec.
10.0 kHz 102.04 uSec. - 98.039 uSec.
10 kHz 102.04 uSec. - 98.039 uSec.
20 kHz 51.020 "Sec, - 49.019 uSec.
50 kHz X10K 20.408 uSec. - 19.608 uSec.
100 kHz 10.204 (Sec. - 9.8038 „Sec.
109 kHz 9.3615 Sec. - 8.9944 „Sec.
b. Connect the equipment as shown in Figure 4-7.
c. Adjust the Frequency Counter controls to measure
period.
d. The 339A 10 Hz frequency should be within the
limits listed in Table 4-4.
e, Verify the 339A Oscillator Frequency Accuracy for
each frequency listed in Table 4-4.
4-19, Oscillator Total
Equipment Required:
Test.
Harmonic Distortion
Spectrum Analyzer (-hp- Model 3044A)
Tuneable Notch Filter (-hp- Model 339 A
600 ohm Resistive Load (-hp- 11095A)
Section IV
a. Set the 339A controls as follows:
FUNCTION ......... OSCillator LEVEL
FREQUENCY .......... 10 Hz (1.0 x 10)
FREQUENCY VERNIER .......... CAL
OSCILLATOR LEVEL ............. 3V
b. Connect the equipment as shown in Figure 4-8,
¢. Adjust the 339A OSCILLATOR LEVEL vernier
for an output level of 3 V rms as indicated on the 339A
meter.
d. Set the Tuneabie Notch Filter (339A) Freguency to
10 Hz and set the Function to Input Level. Adjust the
Input Range control as necessary to obtain an on-scale
meter indication as near full-scale as possible.
e. Set the Spectrum Analyzer (3571 A) controls for an
input impedance of I M 2 , an input range of +10 dB V,a
bandwidth of 3 Hz, and a relative display reference.
f. Tune the Spectrum Analyzer to the exact frequency
of the 339A under test by varyıng the Synthesizer (3330B)
frequency until the Spectrum Analyzer indicates
maximum level, Enter this frequency as both the output
frequency and step frequency of the Synthesizer.
g. Reference the Spectrum Analyzer to the amplitude
of the 339A fundamental frequency by pressing the Enter
Offset button. (Observe a Spectrum Analyzer display of
00.00 dB.)
h. Adjust the Tuneable Notch Filter controls as
necessary to make a distortion measurement. (The
purpose of this step 1s to null the fundamental frequency
of the 339A Oscillator output. This puts the distortion
products within the dynamic range of the Spectrum
Analyzer.)
i. Step the Synthesizer frequency to the second
harmonic frequency of the 339A output.
1. The amplitude of the second harmonic frequency,
relative to the fundamental frequency is determined by
adding the Spectrum Analyzer display reading and the
range setting of the Notch Filter. (As an example: If the
Notch Filter distortion range control is set to -80 dB and
the Spectrum Analyzer display indicates -23 dB the
amplitude of the second harmonic 1s -103 dB, relative to
the fundamental.) Record the amplitude reading of the
second harmonic.
k. Step the Synthesizer frequency to the {frequency of
the third harmonic,
I. Determine the relative amplitude of the third
harmonic by adding the Spectrum Analyzer display
reading and the range setting of the Notch Filter. Record
the amplitude reading of the third harmonic.
4-7
Section IV
Model 339A
TUNEABLE
NOTCH FILTER
{-hp- Model 339A)
SPECTRUM ANALYZER
MEASUREMENT SET
© TN FTN AA TEN SN {-hp- Model 3044A)
909230
DISTORTION PEDO ©
{-hp- Model 339A)
4
у 600 £ LOAD
(-hp- 110954)
ВН
Tw ©
—— © и = =
Peux (DP |
A —1 2 о o ,
О кв © > 5 : i
о $ OTE OL ID
и i
С / и
Figure 4-8. Osciliator Total Harmonic Distortion
Test.
m. Calculate the Total Harmonic Distortion using
the graph shown in Figure 4-9. As an example: If the
+340
NUMBER OF DECIBELS TO BE ADDED
TO LARGEST DISTORTION LEVEL
T4 5A-É-#250
"2 "4 6 -8 > =i0 —!2 ~14 —i6
DECIBEL DIFFERENCE BETWEEN TWO VALUES
Figure 4-9. Logarithmic Addition of Harmonic
Table 4-5,
Components.
Oscillator Total Marmonic Distortion
Test.
339A THD
Frequency Specification
10 Hz > -95 dB
100 Hz > -95 dB
1 kHz > -95 dB
10 kHz > -95 dB
20 kHz > -95 dB
30 kHz > -85 df
50 kHz > -80 dB
109 kHz > -70 dB
4-8
amplitude of the second harmonic is — 110 dB and the
third harmonic amplitude 1s — 114 dB the dB difference
between the two is —4 dB. Locate this number on the
horizontal axis of the graph. The — 4 line intersects the
curve at approximately the + 1.5 level on the vertical
axis. The total harmonic distortion is therefore the
amplitude of the largest harmonic 2nd harmonic) plus
the number determined on the vertical axis (- 110 dB
+ 1.5dB = — 108.3 dB).
n. The 339A should meet the 10 Hz THD specification
listed in Table 4-5.
o. Repeat Steps { through m for each fregeuncy listed
in fable 4-5.
NOTE
It may be necessary to increase the Bandwidth
of the Spectrum Analyzer at higher
frequencies. Adjust as necessary to maintain a
stable reading.
4-20. DISTORTION ANALYZER PERFOR-
MANCE TESTS.
4-21. The Voltmeter Performance Tests, at the
beginning of this section, should be performed and the
Voltmeter accuracy verified before proceeding with the
Distortion Analyzer Tests.
4-22. Fundamental Rejection and Induced
Distortion Test. | |
4-23. The following test requires an exceptionally low
Model 339A Section IV
SPECTRUM ANALYZER
{-hp- Model 3044A; LOW DISTORTION
. OSCILLATOR
-hp- MODEL 239A
E E
CT Se 7 NAS _
DISTORTION
MEASUREMENT SET
(-hp- Model 339A)
— >
ODO000 |
~~ @®QE |
=
O om o
Dí 9 Co A NOE
Figure 4-10. Fundamental Rejection and induced
Distortion Test.
distortion signal source. In most cases the Model 339A NOTE
being used as a source will be sufficient. However, if the
instrument under test does not meet the Induced
Distortion specifications listed in Table 4-6, it must be
determined whether the distortion is due to the signal
source or the analyzer under test, In some cases this may
be accomplished by exchanging the signal source with
another. If this is not practical, low-pass filters may be
constructed to enhance the signal purity of the source.
a. Set the 339A controls as follows:
FUNCTION ............ INPUT LEVEL
FILTERS .........0.0000r0e. OFF (out)
METER RESPONSE ......... NORMAL
INPUT RANGE ...........eeovenzo ЗУ
INPUT/GND SELECT .... DIS. AN./L
(center position)
FREQUENCY 10 Hz (1.0 x 10)
+ + EE F + + = # + x
b. Connect the equipment as shown in Figure 4-10.
c. Set the Low Distortion Oscillator for an output
frequency of 10 Hz. Adjust the output level for a full-scale
(0 dB) meter indication on the 339A under test.
d. Adjust the frequency of the Synthesizer (3330B) for
a maximum level indication on the Spectrum Analyzer
{3571A). Enter this frequency as both the output
frequency and step frequency of the synthesizer.
When adjusting the frequency of the
Synthesizer, use frequency steps equal to 10%
of the fundamental frequency being measur-
ed. This insures adequate resolution.
e. Reference the Spectrum Analyzer to this level by
pressing the enter offset button. The Spectrum Anaiyzer
should indicate 00.00 dB.
f. Setthe FUNCTION switch of the 339A undertestto
DISTORTION.
g. Adjust the DISTORTION RANGE control for an
on-scale meter indication as near full-scale as possible,
h. Determine the fundamental rejection of the 339A
under test by adding the display reading of the Spectrum
Analyzer and the distortion range setting of the 339A
under test. (As an example: If the 336A DISTORTION
RANGE control 1s set to -80 dB and the Spectrum
Analyzer display indicates -35 dB the fundamental
rejection 15 -I 15 dB.)
i. The fundamental rejection level determined in the
previous step must meet or exceed the specification listed
in Table 4-6.
i. Step the Synthesizer frequency to the second
harmonic frequency.
4-9
Section IV
Table 4-6. Fundamental Rejection and Induced
Distortion Test,
Fundamental Induced
Test Rejection Distortion
Freguency Specification Specification
10 Hz
100 Hz
1 kHz > - 100 de > -95 de
10 kHz
20 kHz
30 kHz > -90 dB
50 kHz > -890 > -85 dB
110 kHz > -70 dB
k. Determine the relative amplitude of the second
harmonic by adding the Spectrum Analyzer display
reading and the distortion range setting of the 339A
under test. Record the amplitude reading of the second
harmonic.
|. Step the Synthesizer frequency to the third
harmonic frequency.
m. Determine the relative amplitude of the third
harmonic by adding the Spectrum Analyzer display
reading and the distortion range setting of the 339A
under test. Record the amplitude reading of the third
harmonic,
n. Calculate the Induced Harmonic Distortion using
the graph shown in Figure 4-9.
Model 339A
о. The induced distortion measurement must meet or
exceed the specification listed in Table 4-6.
p. Set the FUNCTION switch of the 339A under test
to INPUT LEVEL.
q. Repeat Steps c through p for each frequency listed
in Table 4-6.
4-24. Distortion Measurement Accuracy Test. |
Ware to 29654 Tm |
Equipment Required: “ia” Lu LSZA 4 Rat DA = art
Be EA Ar Sa
Spectrum Analyzer (-hp- Model 3044 А).
Low Distortion Oscillator (-hp- Model 339A)
600 © 1% Metal Film Resistor (-hp- Part No.
0698-5405)
60 КО 1% Metal Film Resistor (-hp- Part No.
0698-5973)
a. Set the 339A controls as follows:
FUNCTION ......... ... INPUT LEVEL
FILTERS ...............e... OFF (out)
DISTORTION RANGE. .......... -80 dB
INPUT RANGE ...........e0eereo. LV
INPUT/GND SELECT .... DIS. AN./L
{center position)
FREQUENCY ....... 10 kHz (1.0 x 10 K)
b. Connect the equipment as shown in Figure 4-11.
SPECTRUM ANALYZER
-hp- MODEL 3044A
Ш e e
DISTORTION
MEASUREMENT SET
-hp- MODEL 339A
LOW DISTORTION
OSCILLATOR"
nó MODEL 3
El .
re пи, | PE mol Tun
if В 3 | RE] !
a
Гу” ис
К > TA SAN i a
a ЛА
Se _ + | Lu и |
\ SI
>
0 9 с
0006
RESISTOR
60 ко __
O (© Oe
600 (1
RESISTOR
Figure 4-11. Distortion Measurement Accuracy Test.
4-10
Model 3394
Table 4-7. Distortion Measurement Accuracy Tesi.
Distortion Accuracy
Frequency Limits
10 Hz +1.0 dB, -2.0 dB
20 Hz +1.0 dB
100 Hz +1.0 dB
20 kHz +1.0 dB
50 kHz +1.0 dB, -2.0 dB
100 kHz +1.5 dB, -4.0 de
330 kHz +1.5 dB, -4.0 dB
c. Adjust the Synthesizer (3330B) controls for an
output frequency of 1 kHz and an output amplitude of
40 dBm.
d. Set the Low Distortion Oscillator for an output
frequency of 10 kHz. Adjust the output level for a meter
indication of 1 V on the 339A under test.
e. Set the FUNCTION switch of the 339A under test
to DISTORTION.
f. Adjust the Synthesizer amplitude as necessary to
obtain a distortion reading of -80 dB on the 339A under
test (full-scale meter indication).
g. Set the Spectrum Analyzer (3571A) to a 3 Hz
bandwidth, an input range of +10 dB V, an input
impedance of 1 M & , and a relative display reference.
Reference the Spectrum Analyzer to the 339A
Section IV
В. Set the Synthesizer to each frequency listed in Table
4-7, and verify that the Spectrum Analyzer reading is
within the limits listed.
4-25. Residual Noise Test.
Equipment Required:
| К Q shielded load (Refer to Figure 4-12.)
a. Set the 339A controls as follows:
FUNCTION ............. DISTORTION
FILTERS ......... ee... 80 kHz ON (in)
DISTORTION RANGE. .......... -80 dB
INPUT RANGE ...............ee.. ГУ
FREQUENCY ....... 20 kHz (2.0 x 10 K)
INPUT/GND SELECT ..... DIS. AN./L
(center position)
b. Connect the ! Kk£ shielded load to the
DISTORTION ANALYZER input terminals. (See
Figure 4-12 for construction details of 1 k £2 load.)
c. The 339A measurement indication must be below
-92 dB.
4-26. Input impedance Test.
Equipment Required:
Spectrum Analyzer (-hp- Model 3044A)
100 k © 0.1% Metal Film Resistor (-hp- Part No.
measurement by pressing the Enter Offset button. 0698-4158)
No. Description -hp- Part No.
1 Connector, male 1251-0174
2 Connector, male w/insulator 1251-0175
3 Lug, terminal 90° 0360-0042
4 Resistor, 1 kf}, 1/8 W, 1%, 0757-0280
metal fim
5 Washer, int. fock 2190-0007
6 Spacer, 6-32 thr:aded 0380-0058
7 Shield 1251-1073
8 Screw, pan head, 6-32x 1/4 in. 2360-0113
STH- 85-0089
Figure 4-12. Shielded Load Assembly.
Section IV
Model 339A
e
DISTORTION
MEASUREMENT SET
~hp- Model 338A
AC Te
(ON ¡05000
9 -500: |
DA 100 k(} SERIES RESISTOR
Figure 4-13. Input impedance Tesi.
a. Set the 339A controls as follows;
FUNCTION ............ INPUT LEVEL
FILTERS 200000000000 000000 OFF (out)
INPUT RANGE 420600000000 0 0 EV
INPUT/GND SELECT .... DIS. AN./ |
{center position)
b. Connect the equipment as shown in Figure 4-13.
¢. Set the Synthesizer (33308) for an output frequency
of I kHz and adjust the amplitude as necessary to obtain
a meter reading of 0 dB on the 339A.
4-12
d. Set the Spectrum Analyzer (3571A) reference by
pressing the Enter Offset button. Observe a display
reading of 00.00 dB.
¢. Disconnect the cabie from the 339A and insert the
100 k © resistor in series with the input. The Spectrum
Analyzer must indicate -6.02 dB + .05 dB.
f. Change the Synthesizer frequency to 17.000 kHz.
The Spectrum Analyzer reading must be less than -9.00
dB indicating an input capacitance of less than 100 pF,
Model 339A Section IV
PERFORMANCE TEST RECORD
Hewlett-Packard Model 338A Tests Performed By:
Distortion Measurement Set Date:
Serial No,
VOLTMETER PERFORMANCE
Fuii-Scale Accuracy and Frequency Response Test:
339A | 338A 339A 339A 338A 339A 338A 338A
Input input 10 Hz 110 KHz Test 20 Hz 100 Hz 1 kHz 10 kHz 20 kHz Test
Level Range | Reading | Reading Limits Reading | Reading | Reading | Reading | Reading Limits
.001 Y .001V 00086 - .00104 ‚00098 - 00102
‚003 V .003V 00288 - 00312 00294 - 00306
01 v OV ‚0096 - 0104 ‚0098 - 0102
03V 03V 0288 - ‚0312 ‚0294 - 0306.
Лу AV ‚096 - .104 ‚098 - 102
‚ЗУ ЗУ ‚288 - ‚312 284 - ‚306
ТУ 1V 96 - 1.04 88 - 1.02
ЗУ ЗУ 2.88 - 3.12 2.94 - 3.06
tov 10v 9.6 - 10.4 9.8 - 10.2
30V 30V 28.8 - 31.2 29.4 - 30.6
190 V 100 V 96 - 104 88 - 102
300 V 300 V 288 - 312 294 - 306
Meter Tracking and Monitor Output Accuracy Test
339A Monitor
input Meter Test Output Test
Level Reading Limits Levei Limits
10V com ‚98 - 1.02 ‚95 - 1.05
9v Mm at ‚88 - .92 85 - 95
ВУ ‚78 - ‚82 ‚75 - 85
TV ———[—] .68 -.72 65 - 76
GV Mm ‚58 - ‚62 ‚55 - 65
5V 48-52 45 - 5b
AV aan ‚38 - 42 rm] 35 - 46
3V 28 - .32 45 - .35
2V .38-.22 35 -.25
AV - 08 - 12 05-15
Section IV
PERFORMANCE TEST RECORD (Cont'd)
RMS Accuracy {crest factor) Test:
Fitter Accuracy Test:
Model 339A
RMS 338A 338A -3 dB Test
Input Repetition Meter Test Filter Freguency Limits
Level Rate Reading Limits 400 Hz 460 Hz - 435 Hz
100 Hz 2.94 - 3.06 30 kHz 27 kHz -32.6 kHz
ЗУ | К; 2:94 - 3.06 80 kHz 72.1 kHz - 87 kHz
10 kHz 2.88 - 3.12
OSCILLATOR PERFORMANCE
| Output Level and Flatness Test:
338A
Output Output Test
Frequency Level Limits
10 Hz 2.930 - 3.070
20 Hz 2.965 - 3.035
100 Hz 2.365 - 3.035
10 kHz 2.965 - 3.035
20 kHz 2.965 - 3.035
110 kHz 2.930 - 3.070
Maximum Output Level into 600 D = {> 3 Vrms)
4-14
Output impedance Test:
With an unioaded output level of 6.00 V rms, the output
level into a 500 О 1080 =
{test limit 2.927 — 3.077 V rms).
Oscillator Frequency Accuracy Test:
339A Frequency
339A Frequency Counter
Output Range Indication Test
Frequency Setting {Period) Limits
10 Hz 98.04 - 102.04 msec.
20 Hz X10 49.019 - 51.020 msec.
50 Hz 19.608 - 20.408 msec.
100 Hz 9.803 - 10.204 msec.
100 Hz 9.803 - 10.204 msec.
200 Hz X 100 4.9019 - 5.1020 msec,
500 Hz 1.9608 - 2.0408 msec.
$ kHz 9803 - 1.0204 msec.
Model 330A
PERFORMANCE TEST RECORD (Cont'd)
Oscillator Frequency Accuracy Test {Cont'd}:
339A Frequency
339A Frequency Counter
Output Range Indication Test
Frequency Setting (Period) Limits
1.0 kHz 980.3 - 1020.4 usec.
1.1 kHz 891.26 - 927.64 usec.
1.2 kHz 816.99 - 850.34 usec.
1.3 kHz 754.14 - 784.93 usec.
1.4 kHz 700.28 - 728.86 usec.
1.5 kHz 653.59 - 680.27 usec.
1.6 kHz 612.74 - 637.75 usec.
1.7 kHz 576.70 - 600.24 usec.
1.8 kHz X 1K 544.66 - 566.89 usec.
1.9 kHz 615.98 - 837.05 usec.
2.0 kHz 430.19 - 510.20 usec.
3.0 kHz 326.79 - 340.13 usec.
4.0 kHz 245.09 - 255.10 usec.
5.0 kHz 196.08 - 204.08 usec.
6.0 kiHz 163.38 - 170.06 usec.
7.0 kHz 140.05 - 145.77 usec,
8.0 kHz 122.54 - 127.55 usec.
9.0 kHz 108.83 - 113.37 usec.
10 kHz 98.039 - 102.04 usec.
10 kHz 98.039 - 102.04 usec.
20 kHz 48.019 - 51.020 usec.
50 kHz X 10K 19.808 - 20.408 usec.
100 kHz 9.3039 - 10.204 usec,
109 kHz 9.3615 - 8.9944 usec,
Oscillator Total Harmonic Distortion Test:
339A
Output Calculated Test
Frequency THD Limit
10 Hz
100 Hz
1 kHz -95 dB
10 kHz
20 kHz
30 kHz -85 dB
50 kHz -80 dB
109 kHz -70 dB
Section IV
4-15
Section IV
PERFORMANCE TEST RECORD (Cont'd)
DISTORTION ANALYZER PERFORMANCE
4-16
Fundamental Rejection and Induced Distortion Test:
JIA 339A
Test Fundamental Test induced Test
Frequency Rejection Limit Distortion Limit
10 Hz
100 Hz
1 kHz -100 dB -85 dB
10 kHz
20 kHz
30 kHz -90 dB
50 kHz -90 dB -85 dB
110 kHz -70 dB
Distortion Measurement Accuracy Test:
Spectrum
Distortion Analyzer Test
Frequency Reading Limit
10 Hz +1.0 dB, -2.0dB
20 Hz +1.0 dB
100 Hz +1.0 dB
20 kHz +1.0 dB
50 kHz +1.0 dB, -2.0 d8
100 kHz +1.5 dB, -4.0 dB
330 kHz +1.5 dB, -4.0 dB
Residual Noise Test:
Residual Noise with 1 k0 input load and 80 kHz Filter =
Test Limit; below -92 dB.
input Impedance Test:
Spectrum Analyzer indication for 100 kil resistance in
series with 338A input, fregeuncy -1 kHz =
Test Limit -5.97 to -6.07 dB.
Spectrum Analyzer indication for frequency of 17 kkz =
. Test Limit -6.02 to -9.00 dB.
Model 339A
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