HP 8447A User manual

HP 8447A User manual
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NG AND SERVI
O PERATI
AMPLIFIER/
DUAL AMPLIFIER
.1—400MHz
=
Me:
- Y
+
та
PACKARD
Kis HEWLETT
OPERATING AND SERVICE MANUAL
8447A
AMPLIFIER/
DUAL AMPLIFIER
i—400 MHz
SERIAL PREFIX: 955
This manual applies directiy to HP Model 8447A
Amplifier and Model 8447A-001 Dual Amplifier
having serial prefix number 955.
SERIAL PREFIXES NOT LISTED
For serial prefixes above 955, a “Manual Changes”
sheet is included with this manual.
— OHEWLETT-PACKARD COMPANY 1970
1400 FOUNTAIN GROVE PARKWAY, SANTA ROSA, CALIFORNIA, 95404, U.S.A,
MANUAL PART NUMBER 08447-80003 : Printed: APRIL 1970
MANUAL CHANGES
~ To use this supplement:
Make all ERRATA corrections
Г MANUAL IDENTIFICATION —
Medel Number: 8447A
‘Date Printed: APRIL 1970
Part Number: 08447-90003
This supplement contams important information for correcting manual errors and for adapting the manual to
instruments containing improvements made after the printing of the manual,
Make all appropriate serial number related changes indicated in the tables below.
| 01565, 01567 thru
01570, 01572 thru
01575, and 1529A
ae Serial Prefix. or Number .——m Make Manual Changes — Serial Prefix or Number _... Make Manual Changes cum
1145A00356A thru В
01517, 01566. and
£1571
1145A01518 thru 1,2
prefix
16168 | 1,2,3
1 644A 1,2,3,4
1937A | 1,2,3,4,5
{ 2123A 123456
2123A06657 and 2439A | 1,2,3,4,5,6,7
Fr NEW ITEM
NOTE
Manual change supplements are revised as often as necessary to keep manuals as current and accurate as possible.
Hewlett-Packard recommends that vou periodically request the latest edition of this supplement, Free copies are available
from all HP offices. When reguesting copies quote the manual identification information from your supplement, or the model
number ang print date from the title page of the manual
10 FEBRUARY 1986
Printed in USA.
Г HEWLETT
PACKARD
ERRATA
Add to front of manual SAFETY CONSIDERATIONS supplied in this Manual Changes
Supplement,
Page 1-1, Table 1-1: |
Add Reverse Isolation: >30 dB.
Page 3-1, Paragraph 3-7:
Add the following caution before the first sentence in step c:
- CAUTION
The input to the HP 3447A amplifier is very susceptible to damage from
electrostatic discharge. Before connecting any coaxial cable to the input
jack of the amplifier, make certain that static electricity buildup in the
cable is completely discharged.
Page 4-1, Paragraph 4-5:
Add the following caution:
CAUTION
The input to the HP 844TA amplifier is very susceptible to damage from
electrostatic discharge. Before connecting any coaxial cable to the input
jack of the amplifier, make certain that static electricity buildup in the
cable is completely discharged.
Page 4-2, Paragraph 1-6:
Add 10 dB attenuator (2 required) ... HP 8491 Opt, 010 to the equipment list.
Change specification for "Output Level (Compression)" to >+7 dBm at 1-dB compression
point.
Page 4-3, Paragraph 446:
Change step 6 to read as follows:
To check flatness, set the signal level at Channel A to ~30 dBm, Connect a 10 dB
attenuator to each tee, between the tee and the adapter. Note the level difference
between Channel A and Channel B as the generator frequency is tuned from 10 MHZ to
400 MHz, Keep the input level to the amplifier (CHANNEL A) constant and note the
variation in Channel B. Channel B should change >1 dB (+-0.5 dB).
Page 4-5, Paragraph 47:
Under SPECIFICATION, change "parts" to "ports".
Page 4-10, PERFORMANCE TESTS:
Add performance test 4-10, Reverse Isolation, supplied in this Manual Changes
supplement,
Page 4-11, Table #«1: 1
Add Reverse isolation information to Performance Test Record, suppiied in this
Manual Changes supplement.
Page 5-2, Paragraph 5-8:
Change "Figure 4-1" to "Figure 5-1" in step 1.
Page 6-2, Table 6-2: | | a
Change C2 to HP Part Number 0160-2040, Check Digit 1, CAPACITOR-FDTHRU 5000PF +80
20% SOOV.
“Change A1CR1.4 to HP Part Number 1901-0743, Check Digit 1, DIODE:PWR RECT INZ004
400VIA DO-41,
Page 6-3, Table 6-2:
Change U1 and U2 to HP Part Number 5086-7032, Check Digit 9.
Change HP Part Number 1200-0043 to HP Part Number 0340-0664, Check Digit 4,
INSULATOR=XSTR TO-3. |
Page 0-4, Table 6-2:
Change Reference Designation 8 to HP Part Number 08447-00054, Check Digit 3,
PANEL :FRONT STANDARD,
Add Reference Designation 3, HP Part Number 08447-00055, Check Digit 6, PANEL:FRONT
OPTION 001,
Page 6-5, Table 6m3:
Change HP Part Number 1820-0169 to HP Part Number 5086-7032, Check Digit 9,
Change HP Part Number 1901-0159 to HP Part Number 1901-0743, Check Digit 1,
DIODE:PWR RECT INH004 HOQVIA Dell,
Change HP Part Number 08447-00001 to HP Part Number 08447-00054, Check Digit 5,
PANEL:FRONT STANDARD.
“Add HP Part Number 08447-00055, Check Digit 6, PANEL:FRONT OPTION 001.
Change HP Part Number 1200-0043 to HP Part Number 0340-0664, Check Digit #,
INSULATOR-XSTR TO-3.
Page 5-0, Figure 8-3:
Replace Figure 8-3 with the new Figure 8-3 included in this Manual Changes
supplement.
Page 8-9, Figure 8-4:
Change wire colors of T1 power transformer primary windings as follows: 90 (top
winding) to 902, 904 to 905, and 905 to 904,
Delete line connecting CR8 and CH,
CHARGE 1
Page 6-4, Table 6-2: |
Change Cabinet Parts Lists to read as supplied in this Manual Changes supplement.
CHANGE 2
Page 1=1, Table 1-1:
Change the following specifications:
Output Level: 2+6 dBm at 1-dB compression point.
Distortion: Harmonics at least 32 dB down at output levels up to 0 dBm.
Page U-2, Paragraph 4-0:
Change specification for "Output Level (Compression)” to >+6 dBm at 1-dB compression
point.
Page 4-3, Paragraph 4-6, Step 5:
Change "+7 dBm" to "+6 dBm" in first line.
Page 4-8, Paragraph 4-8:
Change specification to read:
Harmonics at least 32 dB down at output levels up to 0 dBm.
In step 3, change 35 dB to 32 dB (two places),
Page 4-11, Paragraph 0:
Change limit under "Min," to —32.
CHANGE 3
Page 6-2, Table 6-2:
Change ATCRS to HP Part Humber 1884-0073, Check Digit 2, THYRISTOR-SCR TO-5
VRRM=100. ©
Add A1R13, HP Part Number 0757-0401, Check Digit 0, R:FXD MET FLM 100 CHM 1% 1/8V.
Page 8-9, Figure 8-4:
Add R13, 100 ohms, from junction of CRE anode/CRY gate to ground.
CHANGE 4
Page 0-3, Table 6-2: |
Change 51 to HP Part Number 3101-2195, Check Digit 7, SWITCH:PUSHBUTTON DPST
(recommended replacement).
Change XF1 to HP Part Number 2110-0470, Check Digit 5, FUSEHOLDER BODY.
Add the following HP Part Numbers and description:
2110-0465, Check Digit 8, FUSEHOLDER CAP,
2110-0467, Check Digit 0, FUSEHOLDER NUT: HEX.
1400-0080, Check Digit 9, WASHER:FLAT NEOPRENE.
Delete HP Part Number 2950-0038,
Page 6-11, Figure 6-1:
Change Reference Designation 6 to HP Part Number (8447-00050, Check Digit 1.
Page 8-9, Figure 8-4:
Change S1 ON/OFF switch as shown in the partial schematic supplied in this Manual
Changes supplement,
CHANGE 5
Page 6-3, Table 06-2:
Change XF1 HP Part Number to 2110-0564, Check Digit 8. |
Change FUSEHOLDER CAP HP Part Number to 2110-0565, Check Digit 9.
Change FUSEHOLDER NUT HP Part Number to 2110-0569, Check Digit 3.
Delete FUSEHOLDER WASHER entry.
CHANGE 6
Page 6-3, Table 6-2;
Change U1 and U2 to HP Part Number 5086-7356, Check Digit 0.
Change We to HP Part Number 08447-20006, Check Digit 9, CABLE ASSEMBLY: IN BNC.
Change W3 to HP Part Number 08447-20007, Check Digit 0, CABLE ASSEMBLY: OUT BNC,
Change Wi to HP Part Number 08447-20008, Check Digit 1, CABLE ASSEMBLY: IN BNC.
Change W5 to HP Part Number 08447-20009, Check Digit 2, CABLE ASSEMBLY: CUT BNC,
Add HF Part Number 08447-00028, Check Digit 3, BRACKET: SUPPORT AMPLIFIER (OPTION
Page 6-5, Table 6-3:
Change HP Part Number 1820-0169 (or 5086-7032, see errata) to HP Part Number 5086-
7356, Check Digit 0,
Page 6-6, Table 6-3:
Delete HP Part Number 0844760003.
Add We, HP Part Number 08447-20006, Check Digit 9, CABLE ASSEMBLY: IN BNC.
Add W3, HP Part Number 08447-20007, Check Digit O, CABLE ASSEMBLY: OUT BNC.
Add Wi, HP Part Number 08447-20008, Check Digit 1, CABLE ASSEMBLY: IN BNC.
Add W>, HP Part Number 08447-20009, Check Digit 2, CABLE ASSEMBLY: QUT BNC,
Add HP Part Number 0844700028, Check Digit 3, BRACKET SUPPORT AMPLIFIER (OPTION
007).
CHANGE 7
Page Im 1, Table 1-1:
Change the Gain specification for the instrument from 20 dB +=0.5 dB to 20 dB +-1.0
dB,
Page 42, Paragraph 4-6:
At the top of page 4-2, change the specification for the Gain from 20 dB +-0.5 dB to
20 dB +0,1 dB.
Page 4-3, Paragraph 4-6:
Page 411/412, Table 4-1:
In step 4, paragraph 4-6, change the tolerance for recording the data from:
+19.5 +20,5 dB
to:
+19,0 +21.0 dB
SAFETY CONSIDERATIONS
GENERAL — This is a Safety Class I instrument
(provided with terminal for protective earthing).
OPERATION — BEFORE APPLYING POWER
verity that the power transformer primary is
matched to the available line voltage, the correct
fuse is installed, and Safety Precautions are taken
(see the following warnings). In addition, note the
instrument's external markings which are
described under *“Safety Symbols.”
| WARNINGS |
Servicing instructions are for use by service-
trained personnel only. To avoid dangerous elec-
tric shock, do not perform any servicing uniess
qualified to do so.
BEFORE SWITCHING ON THE INSTRUMENT,
the protective earth terminal of the instrument
must be connected to the protective conductor of
the (mains) power cord. The mains plug shall only
be inserted in a socket outlet provided with a pro-
tective earth contact. The protective action must
not be negated by the use of an extension cord
(power cable} without a protective conductor
{grounding). Grounding one conductor of a two
conductor outlet provides no protection.
If this instrument is to be energized via an auto-
transformer {for voltage reduction) make sure the
common terminal is connected to the neutral termi-
nal of the power source.
Any interruption of the protective (grounding)
conductor (inside or outside the instrument) or
disconnecting the protective earth terminal will
cause a potential shock hazard that could result
in personal injury,
Whenever it 1s likely that the protection has been
impaired, the instrument must be made inoperative
and be secured against any unintended operation,
Only fuses with the required rated current, voltage,
and specified type (normal blow, time delay, etc.)
should be used. Do not use repaired fuses or short
circuited fusehoiders. To do so could cause a shock
or fire hazard. |
Во not operate the instrument in the presence of
flammable gases or fumes. Operation of any elec-
trical instrument in such an environment consti-
tutes a definite safety hazard.
Do not install substitute parts or perform any un-
authorized modification to the instrument.
Adjustments described in the manual are per-
formed with power supplied to the instrument
while protective covers are removed. Energy avail-
able at many points may, if contacted, result in
personal injury.
Any adjustment, maintenance, and repair of the
opened instrument under voltage should be
avoided as much as possible, and when inevitable,
should be carried out only by a skilled person who
is aware of the hazard involved, |
Capacitors inside the instrument may still be
charged even if the instrument has been discon-
nected from its source of supply.
SAFETY SYMBOLS
A Instruction manual symbol: the
product will be marked with this
symbol when it is necessary for
the user to refer to the instruc-
tion manual in order to protect
against damage to the product.
4 Indicates hazardous voitages.
Earth terminal (sometimes used
in manual to indicate circuit
- common connected to grounded
chassis).
The WARNING sign denotes a
hazard. lt calls attention to a
procedure, practice, or the like,
which, if not correctly performed
or adhered to, could result in
personal injury. Do not proceed
beyond a WARNING sign until
the indicated conditions are fully
understood and met.
| WARNING |
| CAUTION | a
The CAUTION sign denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like, which, if not correctly
performed or adhered to. could
result in damage to or destruc-
tion of part or all of the product.
Do not proceed beyond a CAU-
TION sign until the indicated
conditions are fully understood
and met.
General Information Model 8447A
Figure 1-2. HP Model 8447 A-001 Dual Amplifier
Model 8447 А
General Information
SECTION |
GENERAL INFORMATION
1-1. INTRODUCTION.
1-2. This manual contains all information re-
quired to install, operate, test, adjust, and service
the Hewlett-Packard Model 8447A Amplifier (see
Figure 1-1), This section contains instrument iden-
tification, description, options, accessories, specifi-
cations, and other basic information.
1-3. The various sections in this manual provide
information as follows:
SECTION II, INSTALLATION, provides
information relative to incoming inspec-
tion, power requirements, mounting, pack-
ing and shipping, etc.
SECTION II, OPERATION, provides in-
formation relative to operating the instru-
ment.
SECTION 1V, PERFORMANCE TEST,
provides information required to verify
that the instrument is performing in accor-
dance with published specifications.
. SECTION V, ADJUSTMENTS, provides in-
formation required to properly adjust and
align the instrument after repairs are made.
SECTION VI, PARTS LIST, provides or-
dering information for all replaceable parts
and assemblies.
SECTION VII, MANUAL CHANGES, nor-
mally will contain no relavent information
in the original issue of a manual. This sec-
tion is reserved to provide back dated and
up dated information in manual revision or
reprints.
SECTION VIII, SERVICE, includes infor-
mation necessary to efficiently service the
instrument.
1-4, INSTRUMENT COVERED BY MANUAL.
1-5. Hewlett-Packard instruments carry an 8-di-
git serial number prefix (see Figure 1-3) on the
back of the panel. When the serial number prefix
on the instrument serial number plate of your in-
strument is the same as one of the serial prefix
numbers on the inside title page of this manual, the
manual applies directly to the instrument. When
the instrument serial number prefix is not listed on
the inside title page, manual changes sheets and
manual updating information is provided. Later ed-
itions or revisions to the manual contain the re-
quired change information in Section VII.
1-6. DESCRIPTION.
1-7. HP Model 8447A Amplifier is a general
purpose, low-noise, wideband amplifier (see Figure
1-1). The 8447A provides 20 dB gain to signals in
50 ohm systems from .1 to 400 MHz.
1-8. The Model 8447A amplifier can be used to
make up resistive probe losses or improve sensitivi-
ty when used as a preamplifier to a spectrum analy-
zer or oscilloscope.
1-9. OPTIONS.
1-10. The Model 8447A -001 Dual Amplifier (see
Figure 1-2) is a two-amplifier configuration which
can be operated separately. Each amplifier provides
20 dB gain or the amplifiers can be cascaded by a
front panel patch cable to provide a total gain of
40 dB. |
Table 1-1. Specifications
Frequency Range: 0.1 to 400 MHz.
Gain: 20 dB +0.5 dB*.
Gain Flatness: 10.5 dB.
Noise Figure: <5 dB, 1 to 400 MHz.
Output Level: >+7 dBm at 1-dB compression
point. | |
Distortion: Harmonics at least 35 dB down at
output levels up to 0 dBm.
Impedance: 502 both ports, lo] <0.26
(VSWR <1.7).
Power Requirements: 115 or 230 Vac +10%,
50 to 400 Hz, 15 Watts, 27 VA max.
Weight: Net, 3 lbs, 7 oz. (1,56 kg), shipping: 5
lbs, 1 oz. (2,30 kg)
Dimensions: 8-1/2 inches (216 mm) by 5-1/8
inch (130 mm) by 3-3/8 inches (85,8 mm).
*Measured at 10 MHz.
1-1
General Information Model 8447 A
1-11. EQUIPMENT SUPPLIED,
1-12. The only equipment supplied with the
Model 8447A Amplifier or the 8447A -001 Dual
Amplifier is a 7.5 ft. (2290 mm) power cable.
N
1-13. EQUIPMENT AVAILABLE. Ol [SER 545-00000 Jo
| | — a
1-14. Table 1-2 and Table 1-3 list the test equip- L / N |
ment and test equipment accessories necessary to Z =
test, align, and service the Model 8447A Amplifier. N
SERIAL NUMBER PREFIX SERTAL NUMBER
1-15. WARRANTY.
1-16. Certification and warranty information for
the Model 8447A Amplifier and Model 8447A-
001 Dual Amplifier appears on the inside front
cover of this manual. Figure 1-3. Instrument Identification
Table 1-2. Recommended Test Equipment and Accessories
Instrument Type Critical Specifications Recommended Model Use (Note 1)
Signal Generator Frequency Range: 10 MHz to 400 MHz. HP GO8E/F P
Output Level: -10 dBm min.
Test Oscillator Frequency Range: 100 kHz to 10 MHz HP 651B Р
Output Flatness: +2%
Output: 30 mV
Vector Voltmeter Frequency Range: 10 MHz to 400 MHz. HP 8405 A p
| Bandwidth: 1 kHz.
Sensitivity: 10 mV to 1 Vrms,
Input Impedance: 20.1 megohm.
AC Voltmeter Voltage Range: 30 mV HP 400E PAT
| Accuracy: 11%
Dual Directional Frequency Range: 100 MHz to 400 MHz. HP 778D P
Coupler Coupling Attenuation: 20 dB nominal.
Directivity: Inc port: 32 dB.
Refl port: 30 dB.
Vector Impedance Frequency Range: 500 kHz to 100 MHz. HP 4815A P
Meter Accuracy: +2%,
Digital Voitmeter Range: 50 V HP 3440 A/3443A A,T
Accuracy: +1%,
Ohmmeter Resistance Range: 1 ohm to 100 megohm. HP 412A | T
Accuracy: =10%. |
Cable Assembly BNC Male to BNC Male 4’ long. HP 105034 Р
Cable Assembly Type N HP 11500A P
Tee BNC UG-274B/U P
1-2
Model 8447 A
General Information
Table 1-2. Recommended Test Equipment and Accessories (conta)
Instrument Type
Critical Specifications
Recommended Model Use (Note 1)
Tee(2) 50 ohms. HP 11536A P
Type N connectors.
Adapter BNC maie to Type N Female UG-349A/U P
Termination 50 ohm HP 11593A Р
Load 50 ohm HP 208A Р
Low Pass Filter Cutoff Frequency: 300 MHz. Telonics TLP P
Series
Spectrum Analyzer Frequency Range: 0.5 - 400 MHz HP 140A Display Sec- P
Absolute Amplitude Calibration
Dynamic Range: 50 dB
tion, Model 8554L
Spectrum Analyzer RF
Section, Model 8552A
Spectrum Analyzer IF
Section,
Noise Figure Meter Frequency Range: 200 MHz HP 342A Pp
Noise Figure Range: 0 to 15 dB
Accuracy: +0.5 dB
VHF Noise Source Frequency Range: 400 MHz HP 343A P
Excess Noise Ratio: 6.3 dB +05 dB
Noise Generator: Temperature-Limited
Diode
VHF Signal Generator | Frequency Range: 600 MHz HP 612A P
Output Level: -10 dBm
Double Balanced Frequency Input/Output: “L” “R” ports: HP 10514A P
Mixer 600 MHz, “X” port: 200 MHz
Noise Performance: 9 dB max,
Cable Assembiy (2) BNC Male to BNC Male 9” long, HP 10502A | P
Adapter BNC to BNC UG-491/U | p
Adapter BNC Female to Type N Male UG-201A/U | P
NOTES
i. P = Performance Test: A = Adjustments: | T = Troubleshooting
1-3/1-4
Madel 8447A
Installation
SECTION II
INSTALLATION
2-1. INITIAL INSPECTION,
2-2. Mechanical Check.
2-3. If damage to the shipping carton is evident,
ask the carrier’s agent to be present when the in-
strument is unpacked. Inspect the instrument for
mechanical damage. Also check the cushioning
material for signs of severe stress.
2-4, Performance Check.
2-5. The electrical performance of the Model
3447A or Model 8447A -001 should be verified
upon receipt. Repeat each test on each amplifier in
the Model 8447A -001: Dual Amplifier instrument.
Performance checks suitable for incoming inspec-
tion are given in Sections IV, Performance Tests.
2-6. Claims for Damage.
2-7. Tf the instrument is mechanically damaged
in transit, notify the carrier and the nearest
Hewlett-Packard field office immediately. A list of
field offices is contained in the back of this man-
ual. Retain the shipping carton and padding materi-
al for the carrier’s inspection. The field office will
arrange for replacement or repair of your instru-
ment without delay for claim settlements against
the carrier. Before shipment, this instrument was
inspected and found free of mechanical and electri-
cal defects. If there is any deficiency, or, if electri-
cal performance is not within specifications, notify
your nearest Hewlett-Packard sales and service
office.
2-8. PREPARATION FOR USE.
2-9. Power Requirements.
2-10. The Model 8447A or Model 8447A -001
operates from 115 or 230 volts ac line voltage at
any line frequency between 50 and 400 Hz. A slide
switch on the rear panel is set to the correct posi-
tion for the line voltage available. A 0.5 ampere
line fuse is required for either 115 or 230 volt
operation,
2-11. Power Cable.
2-12. To protect operating personnel,
the Nation Electrical Manufacturers Association
(NEMA) recommends that the instrument panel
and cabinet be grounded. All Hewlett-Packard in-
struments are equipped with a three-conductor po-
wer cable which, when plugged into the appropri-
ate receptical, grounds the instrument. The offset
pin on the power cables three-prong connector is
the ground wire.
2-13. To preserve the protection feature when
operating the instrument from a 2-conductor out-
let, use a three-prong to two-prong adapter and
connector the green pigtail on the adapter to
ground.
2-14. The power cord or power input connector
meet the specifications established by the Interna-
tional Electrotechnical Commission (IEC).
2-15. Operating Environment.
2-16. The operating range of the Model 8447 A or
Model 8447 -001 is from 0 C to +55” C, The ampli-
-— fier can be stored in a temperature range of -40%C
to +75°C.
2-17. Bench Mounting.
2-18. The Model 8447A is equipped with plastic
feet and tilt stand in place, ready for use as a bench
instrument.
2-19. Rack Mounting.
2-20. The Model 8447A may be rack mounted -
by using an adapter frame. The adapter frame is a
rack frame that accepts any combination of sub-
modular units (see Figure 2-1), For additional in-
formation, address inguires to your nearest HP
sales and service office,
2-21. STORAGE AND SHIPMENT.
2-22. Packaging.
2-23. The following paragraphs contains a general
guide to repackaging of the instrument for ship-
— ment. Refer to paragraph 2-25 if the original con-
tainer is to be used; refer to paragraph 2-27 if it is
not. |
2-24. If the instrument is to be shipped to Hew-
lett-Packard for service or repair, attach a tag to
the instrument identifying the owner and indica-
ting the service or repair required; include the
model number and full serial number of the
instrument.
2-1
Installation
2-25. Original Packaging.
2-26. If original container is to be used, proceed
as follows: |
a. Place instrument in original container. If
itisnot avallable a suitable container can be pur-
chased from your nearest HP sales and service
office.
b. Be sure the container is well sealed with
strong tape or metal band.
2-27. Other Packing Material.
2-28, If original container is not used, proceed as
follows:
a. Wrap instrument in heavy paper or plastic
before placing in inner container. .
Model 8447A
‚В. Place packing material around all sides of
the instrument and protect panel face with card-
board strips.
¢. Place instrument in a heavy carton or
wooden box and seal with strong tape or metal
band. See Table 2-1 for the required shipping car-
ton test strengths.
d. Mark shipping container: DELICATE IN-
STRUMENT, FRAGILE, ete,
Table 2-1. Shipping Carton Test Strength
Gross Weight (Ibs) | Carton Test Strength (Ibs)
upto 10 200
10 to 30 275
30 to 120 350
120 to 140 500
140 to 160 | 600.
® A
TABS IN TOP AND BOTTOM
MOUNTING SLOTS
©
INSERT DIVIDER, ENGAGING ra —,
T
т
у
|
—
TWIST DIVIDER TO kJ
VERTICAL POSITION
©
PUSH INTO LIMIT
O | | | ||
SLIDE LATCH TO LOCK | io, \ |
A za |
1 N
PUSH RETAINER DOWN
TO RELEASE
©)
SLIDE INSTRUMENT
INTO CASE
TO SET RETAINER BACK IN
PLACE, ENGAGE HOOKS
FIRST ON ONE SIDE OF
DIVIDER, THEN ON OTHER
PUSH RETAINER UP TO LOCK
Figure 2-1. HP Model 1051 A Combining Case Instrument Installation
2-2
Model 8447A
Operation
SECTION lf
OPERATION
3-1, INTRODUCTION.
3-2. This section contains the basic information
required to operate the Model 8447A Amplifier or
the Model 8447A -001 Dual Amplifier,
3-3. The Model 8447A and the Model 8447A
-001 provide 20 or 40 dB gain (cascaded amplifi-
ers) respectively. The amplifier can be used in 50
ohm systems to increase sensitivity, make up for
probe losses, and general amplification of signals
from 0.1 to 400 MHz, The amplifier can also pro-
vide some amplification of signals up to 700 MHz.
34. PANEL FEATURES.
5-5. The Model 8447A and Modei 8447 -001
front and rear panel controls and connectors are
explained in Figure 3-1. The descriptions are keyed
to the corresponding items which are indicated on
the figures. Further information regarding the vari-
ous uses of the amplifiers are included in Figures
3-2, 3-3 and 3-4.
3-6. OPERATOR CHECKS.
3-7. Five steps should be taken by the operator
to determine the operational condition of either
the Model 8447A Amplifier or the Model 8447A
-001 Dual Amplifier.
a. Turn instrument on, check to see if the
front panel LINE light is on. If the light is on
proceed to step c. If light is off proceed to step b.
b. If the light is off, remove the fuse from
the rear panel. Check to see if the fuse is good. If
the fuse is good proceed to step c. If the fuse is bad
replace the fuse and turn the instrument on. If the
fuse opens again, see Section VIII, Maintenance,
for repair.
с. If the line fuse is good and the power
switch 1s depressed, connect a known signal (0.1 to
400 MHz) to front panel INPUT. Monitor the
OUTPUT jack to see that the Model 8447A pro-
vides approximately 20 dB gain to the input signal.
lf there 15 no gain, go to step d.
d. If the rear panel fuse is OK, turn the in-
strument top side down and remove the bottom
cover. Check to see that the fuse on the Al Power
Supply board is good. If the fuse is bad, replace the
fuse and turn the instrument back on. If the fuse
blows again, see Section VIII, Maintenance, for
repair.
e, If the Model 8447A provides the proper
gain and the front panel light is out, replace the
lamp (see paragraph 3-10, Operator Maintenance).
NOTE
Be sure to provide 509 source and load |
impedances. |
3-8. OPERATING INSTRUCTIONS.
3-9. Figure 3-2 thru 3-4 contain general applica-
tion information for the Model 844"7A and the
Model 8447 -001 Dual Amplifiers.
3-10. OPERATOR MAINTENANCE.
311. Operator maintenance is limited to replace-
ment of the front panel LINE switch light, the Al
power supply fuse, and the rear panel fuse. For any
internal maintenance on the amplifiers, see Section
VIT, Maintenance.
3-12. FUSES.
3-13. To replace the rear panel fuse (F1), remove
the rear panel fuse knob and replace the fuse with
0.5 amp 250 Y fuse.
3-14. To replace the Al Power Supply (A1F1)
fuse, tum the instrument on its top. Lift tilt stand
and remove the bottom cover. Replace the fuse on-
the Al Power Supply board with 0.5 amp 250 V.
fuse,
3-15. LAMP REPLACEMENT,
3-16. To replace the front panel line switch lamp
(DS1), proceed as follows:
a. Disconnect cord from rear panel recep-
tacie.
b.. Pull the white cover portion of this switch
from the instrument and then remove the lamp
from inside the cover.
с. Replace old lamp with a new lamp (see
Section VI for part number of DSi}.
d. Place white cover into switch receptacle.
e. Align tab on white cover with socket and
push in,
3-1
Operation | Model 8447A
FRONT AND REAR PANELS
1. LINE ON/OFF: Instrument power on/off
switch.
à INPUT 500: Connects input signal to
amplifier,
CAUTION
Do not apply more than 10 volts de
to the input. Maximum power that
can be applied to the input from a
50 ohm source is 1 Watt. When con-
necting the amplifier to a low im-
pedance source, a limiting resistor
must be placed in series with the
input port to limit the peak current
to a maximum of 150 mA. To com-
pute limiting resistor, assume that
the input impedance can be as low
as 282 under overioad conditions.
3. OUTPUT 502: Connects amplifier output
to load.
CAUTION
Do not apply more than 30 volts de to
output.
4. SELECTOR: Selects 115 voits ac or 230
volts ac primary power.
5. Fuseholder: Contains 0.5 ampere fuse for.
115 or 230 volt operation,
6. AC Power Connection: Connects line po-
wer to the instrument.
Figure 3-1. Front and Rear Panel Controls and Connectors
3-2
Моде! 8447 А Operation
INPUT OUTPUT
Ha 30 0
LINE
AMPLIF TER DA N 20 de AMPLIF ау e N de
|
INPUT GAÍN NPLUT CABLE GAIN
QUT PUT OUTPUT
Figure 3-2, General Application of Figure 3-3. Cascade Operation of 8447A-001
8447A Amplifier Dual Amplifier
OSCILLOSCOPE f DUAL
CHANNEL AMP / TIME BASE
rt ©
| © ©
mrt
52 ® > e
№
Qo cm
DEVICE UNDER TEST
E
CABLE 1507 A
LE ï
RESISTIVE PROBE
DUAL AMPLIFIER
HP 8447A-001
N > el
Figure 3-4. Single Amplifier Operation of 8447A.001
Dual Amplifier
3-3/3-4
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