HP 608E Service manual

•
•
.
.
60BE/F
VHF SIGNAl GENERATOR
HP PART NUMBER 00608-90046
rli~ HEWLETT
~~ PACKARD
l

,
,-------- OPERATING AND SERVICE MANUAL ----------,
608E/F
VHF SIGNAl GENERATOR
HP PART NUMBER 00608-90046
SERIALS PREFIXED:
This Operating and Service manual applies to HP
608E/F instruments with serial numbers prefixed
833-
above 02720 (GOBE) and 832- above 01500
(608F).
SERIAL PREFIXES NOT LIST~!l:
For instruments with lower serial number prefixes
a
"Backdating" Appendix is supplied in the back
of this manual.
Flio- HEWLETT
~r..I PACKARD
© Copyright HEWLETT-PACKARD COMPANY 1965
1501 PAGE MILL ROAD, PALO ALTO, CALIFORNIA, U.S.A.
\OPERATING AND SERVICE MANUAL PART
NO. 00608·90046
Operating end Service Menual MIcrofiche Part No. 00608-90047 Printed: APRIL
1981

Model 608E/F '
Table of Contents
TABLE OF CONTENTS
Section
Page Section
Page
IV PRINCIPLES OF OPERATION ..•....
VMAINTENANCE .
5-1. Introduction .........•.•..
5-3. Periodic Inspection ...•.•....
5-4. Cleaning •.......•.•....
5-6. Lubrication ......•...•...
5-9. Performance Tests ...••.•...
II INST ALLA TION .......•......•••
2-1. Incoming Inspection .......••.
2-3. Preparation For Use .......•
2-4. Power Requirements •.......
2-6. Power Cable .
2-8. Repacking For Shipment •.......
I GENERAL INFORMATION ...•.•..•.
1-1. Description ......•••.•....
1-3. Frequency ........•......
1-5. Modulation .
1-7. RFI ....•••............
1-9. Auxiliary Equipment .•.•....•.
1-10. Model 11509A Fuseholder ....
1-12. Model 11508A Terminated
Output Cable •............
1-14. Instrument Identification .....•.
5-15
5-15
5-29
5-30
5-32
5-32
5-14
5-26
5-26
5-16
5-12
5-12
5-13
5-13
5-18
5-11
5-17
5-17
5-18
5-12
5-10
5-10
5-23
5-23
5-23
5-25
5-25
5-16
5-1
5-8
5-9
5-9
5-8
5-8
5-8
5-1
5-5
5-5
5-5
5-7
5-7
Purpose .
Frequency Accuracy and
Resettability Test ....•....
Calibrator Accuracy Test .
Frequency Drift Test .
Residual FM Test .
Incidental FM Test •...•....
Maximum RF Output Test .....
Frequency Response and
Leveling Test .
RF Output Accuracy Test .
Uncalibrated RF Output Test .
External Sine-Wave Modulation
and Modulation Meter Test ..
Internal Modulation Test .
Envelope Distortion Test .
External Pulse Modulation and
ReSidual Level Test •.....•.
RF Leakage Test .
Frequency Control Input Test
(Model 608F Only) ........•
Frequency Analog Output Test
(Model 608F Only) .
Synchronization Test with Model
8708A
Synchronizer
(Model 608F) ...•.....••.
Adjustment .
Power Supply Voltage Adjustments
Modulation Meter Adjustment ...
Calibration of Percent
Modulation Meter .......•
Automatic Output Leveling
Adjustment .......•......
RF Oscillator Adjustment .....
Uncalibrated RF Output, Minimum
RF Output, and RF Amplifier
Tracking Adjustment ....•.
RF Output Meter Accuracy
Adjustment .....••......
RF Output Meter/ AUenuator
Frequency Response and Auto-
matic-Leveling Output
Adjustment .
Crystal Calibrator Adjustment .•
Troubleshooting ...••........
Isolating a Trouble to a
Circuit Section ..........•
Isolating Trouble in Transistor
Circuits .
Replacement and Repair ......•
Etched Circuit Board Repair .
Component Replacement .
Etched Conductor Repair •....
Transistor and Semiconductor
Diode Replacement ...•.....
Replacement of Electron
Tubes .
Attenuator Probe Repair
and Replacement .......•..
Replacement in Housing .
Replacement of Lamp DSI .
Location of Parts .
5-47.
5-48.
5-50.
5-59.
5-62.
5-63.
5-64.
5-66.
5-46.
5-67.
5-54.
5-74.
5-82.
5-83.
5-85.
5-42.
5-43.
5-25.
5-26.
5-29.
5-31.
5-34.
5-37.
5-10.
5-12.
5-13.
5-14.
5-15.
5-16.
5-17.
5-18.
5-19.
5-20.
5-21.
5-41.
5-27.
5-28.
5-22.
5-23.
5-24.
4-4
4-5
4-7
4-7
4-7
4-8
5-1
5-1
5-1
5-1
5-1
5-1
3-1
3-1
3-1
3-1
3-1
3-1
3-1
3-4
3-4
3-5
3 -5
4-1
4-3
2-1
2-1
2-1
2-1
2-1
2-1
4-1
4-1
4-1
4-1
4-1
4-2
4-3
4-3
4-3
4-3
1-1
1-1
1-1
1-1
1-1
1-1
1-1
1-1
1-1
Introduction .
General Description. .. . .
RF Generator Section,
Mode1608E .
RF Generator Section,
Model 608F .
Amplitude Modulation Section ..
Attenuator Section .••..•..••
Calibrator Section ..•.....•.
Modulation Meter Section ...•.
Power Supply Section .
Detailed Description .
RF Generator Section,
Model608E ....•......••
RF Generator Section,
Model608F ....••.......
Amplitude Modulation Section ••
Attenuator Section .......•
Calibration Section .
Modulation Meter Section .
Power Supply Section .
4-33.
4-9.
4-15.
4-17.
4-19.
4-21.
4-23.
4-25.
4-37.
4-51.
4-55.
4-59.
4-63.
4-1.
4-3.
4-5.
4-7.
III OPERATION .••..............•.
3 -1. Introduction .
3-3. Controls, Indicators and Connectors
3-5. Pre-Operational Procedures ....
3-7. RF Output Loading .....•...
3 -9. Turn-On Procedures .....•..
3-11. Calibration Procedures .
3-16. Mode Operating Procedures ...•.
3-18. Internal Modulation. . . . .
3
-20. External Modulation ..... ..
3-22. Phase-Lock Operation Procedures
(Model 608F Only) ...
•
•
iii

Table of Contents
List of lllustrations
TABLE OF CONTENTS (Cont.)
Model 608E/F
Section Page Section
Page
VI REPLACEABLE PARTS .....•.... 6-1
6-1. Introduction............... 6-1
6.3. Replaceable Parts List. • . • • •• 6-1
6-6. Ordering Information. ••••• •• 6-1
6-9. Factory Selected Parts (*). . . .. 6-1
vn SCHEMATIC DIAGRAMS
COMPONENT LQCATION INFORMATION 7-1
7-1. Introduction............... 7-1
APPENDIX 1. .................... .. 1·1
APPENDIX IT. . • . . • • • . • • . • • • • • • . • . •. IT-I
LIST OF ILLUSTRATIONS
Number
Number
1-1.
3-3.
3-4.
4-1.
5-1.
5-2,
5-3.
5-4.
5-5.
5-6.
5-7.
5-8.
5·9.
5-10.
5-11.
5-12.
5-13.
5-14.
5-15.
5-16.
5-17.
Iv
Title
Model 608E and 608F'VHF Signal
Generators •................
Front Panel Controls, Indicators,
and Cormectors ••..•..........
Controls, Indicators and Connectors
Used in Operation with Internally
Generated Signals ......•..•.•.
Controls, Indicators and Connectors
Used In Operation with Externally
Supplied Signals ..........•...
Controls. Indicators, .:::.!:.1 ~::'''::''::::''=3
Used in Phase-Lock Operation
(Model 608F Only) ...•.........
Overall Block Diagram, Models
608E and 608F .
Fabricated Test EqUipment ...
Lubrication POints, RF 1\mer Drive
Mechanism. ...•.............
Frequency Accuracy and Resettability
Test Setup ...•..............
Residual and inCidental FM Test Setup.
RF OutpJ.t Test Setup. ....•.....•
Uncalibrated RF Output Test Setup ..
External Sine-Wave Modulation and
Modulation Meter Test Setup .
Envelope Distortion Test Setup .
Pulse Modulation Test Setup .
RF Leakage Test Setup .
Frequency Control Input TestSetup ..
Synchronization Test Setup .
Location Power Supply and
Modulation Meter Adjustments ....
Modulation Meter Calibration Test
Setup ............•.........
Pattern on 140 Oscilloscope at 50%
modulation .
Location of Leveling and RF Output
Meter Adjustment .
Location of RF Oscillator Adjustment
Page
1-0
3-2
3-6
3-8
3-10
4-0
5-3
5-4
5-5
5-6
5-7
5-8
5-"
5-10
5-10
5-11
5-11
5-12
5-13
5-14
5-14
5-15
5-16
5-18.
5-19.
5·20.
5-21.
5_22.
5·23.
5-24.
5-25.
5-26.
5_27.
5-28.
5_29.
5-30.
5_31.
5-32.
5·33.
7 -1.
7-2.
7-3.
7-4.
7 -5.
TtUe
Frequency-Response Adjustments ...
Location of Frequency-Response and
Crystal-Calibrator Adjustments ....
Voltage and Resistance Measure
INT 1000 - Operation ...•.......
ALC Board Voltage and Resistance
Measurements, CW and PULSE
SET RF OUTPUT Operation .
Transistor Biasing and Operating
Characteristics ...•...........
Location of Electron Tubes .
Replacement of Oscillator and
Amplifier Tubes .
Disassembly of Attenuator Drive
Cable. , .
Attenuator Probe, ShOWing Pickup
Loop and Impedance Matching Network
RF Generator Assembly Location of
Unlabeled Parts (Side Cover Removed)
Model 608E RF Generator Assembly
ShoWing Location of Unlabeled Parts
(Top Cover Removed) .......•..•
Model 608F RF Generator Assembly
ShOWing Location of Unlabeled Parts
(Top Cover Removed). .
Right Side View Showing Location of
Unlabeled Chassis Components .....
Left Side View Showing Location of
Unlabeled Components .
Rear View Showing Location of
Unlabeled Chassis Components .
Circuit Board Parts Identification .
Schematic Wormation lllustration _
Schematic Diagram Notes .
Component Identification, Modulator
and ALC Board .
RF Generator and Modulator
Schematic Diagram .
Modulation Meter, Crystal Calibration,
and Power Supply Schematic Diagram ..
Page
5-18
5-18
5-19
5-22
5-24
5-28
5_29
5-30
5-31
5-32
5-33
5-34
5-35
5-36
5-37
5-38
7-1
7-2
7-3
7-3
7 -5
)
,
)

•
•
Model 608E IF
Number
I-I.
5-1.
5-2.
5-3.
5-4.
5-5.
5-6.
5-7.
6-1.
6-2.
6-3.
6-4 .
LIST OF TABLES
Title
Specifications ...............•...
Test Equipment Required for
Maintenance .
Lubrication Chart .
Out-of-Circuit
Transistor Resistance
Measurement .
Safe Ohmmeter Ranges for
Transistor
Resistance Measurement .
Etched
Circuit Soldering Equipment .
Checks Following Tube and Semiconductor
Replacement .
608E/F Troubleshooting Procedure .
Reference Designations .
Abbreviations .
Replaceable
Parts .
Code
List of Manufacturers .
Page
1-2
5-2
5-4
5-25
5-25
5-26
5-27
5-40
6-2
6-2
6-4
6-12
List of Tables
v

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-c:JP
Section I
••
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••
--
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Model 608EIF
•
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--
--
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Model 608E
e
.1iJ1iia .
V
Model 608F
)
\
./
1-0
Figure 1-1. Model 60SE and 608F VHF Signal Generators

Model 608E/F
SECTION I
GENERAL INFORMATION
Sedion I
•
,
1·1. DESCRIPTION.
1-2. The Hewlett-Packard Model 608E and 608F
Signal Generators (see Figure 1-1) are designed to
meet the requirements of precision laboratory work,
and
yet to be equally useful for general applications in
the VHF frequency range. The Model 608E furnishes
RF signals from O. 1 microvolt to 1volt from 10 MHz
to 480 MHz, whiletheModel608F supplies RF signals
from O. 1 microvolt to O. 5 volt in a frequency range
from 10 MHz to 455 MHz. The RF carrier can be
amplitude modulated by internally generated sine-
wave signals, or by externally supplied sine-wave or
pulse signals. The Mooel 608F contains frequency
control circuitry which permits the instrument to be
used in phase-lock operation with the Model 8708A
Synchronizer. This provision provides a stabilized
output across most of the range of the instrument,
with a drift factor of <2 x 10-1 per 10 minutes. The
instruments can be used for troubleshooting, testing,
calibrating, measuring standing-wave ratios, and
checking antenna and
transmission line characteris-
tics. To preserve accuracy, equipment design holds
spurious modulationto alow value under all operating
conditions. Detailed specifications for both instru-
ments are listed in Table 1-1.
1-3.
FREQUENCY.
1-4. The frequency ofthec'.1tpu! signal is indicated on
adirect reading dial, the calibration of which is accurate
to better than ±O.5% for the 608E and ±l% for the 608F,
when the cursor and FINE FREQ are properly aligned.
Calibration accuracy may be improved further by use of
abuilt-incrystal-controlled heterodyne calibrator which
furnishes 1 MHz checkpoints from 10 MHz to 270 MHz, or
5MHz checkpoints over the entire frequency range of the
instrument. At any checkpoint the calibration can be set
very elO8e to the calibrator accuracy of 0.01 %, bringing
overall accuracy to at least ±O.O5%. F'l'equency check
point signal.e are obtained when a headphone set (not
fumi.ehed) is plugged into the XTAL CAL OUTPUTjack.
The control for the output attenuator is calibrated in both
decibels
and volts. When the instrument is connected to a
5Q.ohm resistive
load and power into the output attenua·
tor is exactly at the ATI'ENUATOR CALIBRATED mark
(+7 dB) on the RF OUTPUT meter, the level of power or
voltage applied to the RF OUTPUT connector may beread
directly on the A1TENUATOR dial with an accuracy of
±1 dB. When connected to a5O-ohm resistive load, the
VSWR at the RF OUTPUT connector will nol be greater
than 1.2 (SWR of 1.6 dB). The signal generators feature
automatic output leveling, maintaining the RF output
within ±1 dB of the adjusted output.
1-5. MODULATION.
1-6. The RFoutput signal can be amplitude modulated
by
internally generated 400 or lOOO-cyde sine waves,
externally applied sine waves above 1. 0volt rms over
the frequency range from 20 Hz lo 20 kHz, or exter-
nally applied pulses of 10 volts peak-lo-peak. When
pulse modulated, the signal generators are capable of
producing pulses of RF energy as short as 4 micro-
seconds at Signal frequencies above 40 MHz, and pulses
as short as 2 microsecond above 220 MHz. The degree
of sine-wave modulation is continuously variable from
o to 90% by a front-panel control. All sine-wave modu-
lation of the output signal is continuously monitored
and indicated in percentage on a direct reading modu-
lation meter.
1-7. RFI.
1-8. RF leakage is held to a minimum and is such
that when the output signal is adjusted for O. 1 micro-
volt, the conducted signal leakage at any other front
panel connector and the radiated leakage two inches
from the instrument are each less than 1.0 microvolt.
1·9. AUXILIARY EQUIPMENT.
1-10. MODEL 11509A FUSEHOLDER.
1-11.
To protect the output attenuator from damage,
for some applications (such as transceiver testing) it
is desirable to insert afuse between the signal gen-
erators and external equipment. The 11509A is a
special coaxial fuseholder which houses atype 8AG,
1/16 amp fuse which protects the output attenuator
from damage in the event that an external voltage is
accidently applied to the RF OUTPUT connector. The
fuseholder has an insertion loss of O. 50 dB at 200 MHz,
O. 56 dB at 300 MHz, and 0.65 dB at 400 MHz; tis
SWR is not greater than 1. 35 when connected to a50-
ohm resistive load.
1-12. MODEL 1150BA TERMINATED OUTPUT
CABLE.
1-13. This cable assembly provides aSO-ohm ter-
mination and standard binding posts at the end of a 24-
inch length of cable. The 11508A allows direct con-
nectionofthe instruments to a high-impedance circuit.
1·14. INSTRUMENT IDENTIFICATION.
1-15. Hewlett-Packard 1nstruments carry a two-sec-
tion, eight-digit serial number. The first three digits
are a prefix. The contents of this manual apply to
those instruments having the serial number prefix
shown on the title page. If the serial prefix on your
instrument 1s not mentioned on the title page, in the
Appendix to this manual, or in aManual Change Sheet
enclosed with the manual, the corred information may
be
obtained from any Hewlett- Packard Sales and Ser-
vice Office (see rear of manual for addresses).
1-1

Section I
Model 608E/F
Table 1-1. Specifications
FREQUENCY CHARACTERISTICS
608E
Accuracy: Within ±1 dB of attenuator dial reading
at any frequency when RF output meter indicates
"ATTENUATOR CALIBRATED."
input. A voltage change from -2 volts to -32 volts
will change the output frequency more than 0.2%
at the low end of each band and more than 1% at
the high end of each band. Nominal 4 Kn input
impedance, direct coupled. Voltage limits:
OV .::: applied voltage .::: -50V.
OUTPUT CHARACTERISTICS
608E 608F
Output Level: Continu-
ously adjustable from
0.1 trV to O. 5V into a
50n load. Output at-
tenuator calibrated in
V and dBm (0 dBm =
1mW in 50n).
Output Level; Continu-
ously adjustable from
0.1 /lV to IV into a
50n load. Output at-
tenuator calibrated in
V and dBm (0 dBm =
1mW in SOn).
608F
Range: 10 to 455 MHz in
five bands (10-21, 21-
44,44-95,95-210, and
210-455 MHz). 10-
430 MHz when used
with 8708A Synchro-
nizer.
Accuracy: ±1% with cur-
sor adjustment.
Drift: Less than 50 parts
in 106 per 10 min. pe-
riodafter Ihr. warm-
up. Stability used with
8708A Synchronizer.
5x 10-
a
/min.
2x 10-
7
/min.
Range: 10to 480 MHz in
five bands (10-21, 21-
43,43-95, 95-215, and
215-480 MHz).
Accuracy: ±O.5% with cur-
sor adjustment.
Drift: Less than 50 parts
in 10
6
per 10 min.
period after 1 hr.
warmup.
(0· -55 ·C)
-7 %
2x10 /10 line
voltage change.
Tuning Control: Frequency control mechanism
provides a In a i n dial calibrated in MHz and a
vernier dial for interpolation purposes. Total
scale length approximately 45 inches. Calibra-
tion: every othe rMHz from 13U to 27U MHz;
every 5MHz above 270 MHz.
Leveling: Internal feedback circuit retains "AT-
TENUATOR CALIBRATED" reference on RF
output meter over wide frequency ranges (typi-
cally octave bands). Adjustment of front panel
AMP. TRIMMER control (only) for maximum
RF output indication automatically restores ini-
tial carr.ier level for greater frequency changes.
Impedance: 50n; reflection coefficient <0.091
(1. 2SWR, 20.8 dB return loss) for attenuator
setting below -7 dBm.
)
Resettability: Main frequency control resettability
better than ±G. 1% after initial warmup. FINE
FREQUENCY ADJUST prOVides approximately
±25 kHz settabilityat 480 MHz (proportionately
finer adjustment at lower frequencies).
RFI: Meets all conditions specified in MlL-I-
618m; permIts receiver sensitiVity measure-
ments down to at least 0.1 /lV.
Auxiliary RF Output:
Crystal Calibrator: Provide s frequency check
points every 1MHz up to 270 MHz or every
5MHz over the range of the instrument. Head-
phone jack provided for audio frequency output
(headphones not incluC1ed). Crystal frequency
accuracy better than 0.01% at normal room
temperatures. Cursor on frequency dial adjust-
able over small range to aid in interpolation ad-
justment. -Calibrator maybe turned off when not
in use.
Residual FM: <±5 parts tn 10
7
in a10 kHz post-
detection bandwidth.
Harmonic Output: At least 35 dB below the carrier
for harmonic frequencies below 500 MHz.
Frequency Control Input: (608F only). The 608F
FREQ CONTROL INPUT normally used with the
8708A Synchronizer can also be use d for ex-
ternal frequency control by varying adc voltage
608E
Fixed Ie ve I CW signal from RF oscillator
(minimum amplitude 180 In V rms into 50n)
provided at front panel ENC female connector
for use with external equipment (e.g., fre-
quency counter).
608F
cw signal from RF Oscillator pro vi de d at
front panel ENC female connector. Powe r
levels into son are as follows:
10 to 215 MHz: -1. 8 to +7 dBm
215 to 400 MHz: +2. 0 to +6 dBm
400 to 430 MHz: +1. 0 to +5 dBm
Signal for use with HP 8708A Synchronizer or
othe r external equipment (e.g., frequency
counter).
)
1-2

Model 608E/F Section I
Table I-I. Specifications (Cont.)
MODULATION CHARACTERISTICS
(Front-panel AMP. TRIMMER control adjusted for
maximum indication of RF Output Meter and RF
Output Meter set to Attenuator Calibrated.)
Internal AM
Frequency: 400 and 1000 Hz, ,:tl0%. Modula-
latton signal available at front panel BNC fe-
male connector for synchronization of external
equipment.
--.
,
".,
~"
"~'_I"'OOOU'" , .. u. .... """,
GENERAL
608E and
608F
Power: 115 or 230 V .±IO%, 50 to 400 Hz. Approxi-
mately 220 W.
Dimensions
CabinetMount: 13-1/4 in. (337 mm) wide, 16-3/4
in. (416 mm) high, 21 in. (533 mm) deep.
Rack Mount:
Above 220 MHz, combined
rise and decay time
less than 2. 5 ~s.
On-Off Ratio: At least 20 dB [or pulsed carrier
levels o( O. 5 V and above.
Input ReqUired:
Positive pulse, 10-50 Vpeak;
input
impedance 2kn.
608F
Modulation Level: 0 to
95% modulation with
Output
Attenuator at
0.224 V (1 mW) or be-
low; continuously ad-
justable with front-
panel MOD LEVEL
control.
Carrier Envelope Distortion: Less than 2% at
30% AM and less than 5% at 70% AM.
608E
Modulation Level: 0
to
95% modulation at
carrier levels 0.5 V
and below; continu-
ously adjustable with
(ront-panel MOD
LEVEL control.
•
Modulation Meter
Accuracy: ±5% o(full scale 0 to 80%, .±.IO% from
80% to 95% «(or lNT AM or 20 Hz to 20 kHz
EXT
AM).
Incidental Frequency Modulation (at 400 and 1000
Hz modulation)
Less than 1000 Hz peak at 50% AM for frequen-
cies above 100 MHz. For frequencies below
100 MHz,
less than 0.001% at 30% AM.
External Pulse Modulation
Rise and Decay Time: From 40 MHz to 220 MHz,
combined
rise and decay time less than 4 ~s.
.i f-
" I
t:k
'''.0'
RUR
".
Weight
Cabinet Mount: Net,
62 Ib (28 kg). Shipping, 74
Ib (33, 4kg).
Rack Mount: Net, 62 lb (28 kg). Shipping, 83 lb
•(37, 4kg).
Accessories Available
11508AOutputCable prOVides 50- n. termination
and standard binding posts at the end of a24-
inch (610 mm) length of
cable. Allows direct
connection o( the signal generator to hlgh im-
pedance circuits.
11509A Fuse Holder provides protection for the
output attenuator when the 608 is used for trans-
ceiver tests.
10514A Mixer foruseas nanosecond pulsemodu-
lator or balanced modulator.
10515A Doubler for extending the frequency range.
608F
Modulation Level: 0 to
95% modulation with
Output
Attenuator at
0.224 V(1 roW) or be-
low; continuously ad-
justable with front-
panel MOD LE VEL
control. Input re-
quired: 1 to 10 V
rms (1 knlnput
lmpedance).
Carrier Envelope DistorUon: Less than 2% at
30% AM, less than 5% at 70% AM (modulation
source distortion less than O. 5%).
External control o( carrier level can be achieved
through application o( dc voltage in EXT AM
mode.
Modulation Level: 0
to
95% modulation at
carrier levels 0.5 V
and -below; continu-
ously adjustable with
front-panel MOD
LEVEL control. In-
put requlred: 1 to 10
V rms (1 kninput
impedance).
External AM
Frequency: 20 Hz to 20 kHz.
608E
1-3

Model 608E/F
SECTION II
INSTALLATION
Section n
•
'.
2-1. INCOMING INSPECTION.
2-2. This instrument was inspected mechanically and
electrically prior to shipment. Inspect for mechani-
cal damage received in transit and test electrical per-
formance using procedures given in SectionV. If there
is damage or deficiency, or if electrical performance
is not within specif1cations. notify the carrier and your
Hewlett-Packard sales and Service Office immediately
(see 11st at rear of this manual.)
2-3. PREPARATION FOR USE.
2-4. POWER REQUIRE~{ENTS.
2-5. The VHF Signal Generator requires apower
source of 115 or 230 volts ac .!.lo%, single phase,
which can supoly approximately 220 watts. A two-
position slide switch, on the inside rear chassis, per-
mits operation from either a115- or 230-volt power
soorce. The number visible on the switch slider in-
dicates the line voltage for which the signal generator
is connected. The correct fuse rating for each line
voltage is adjacent to the switch. To prepare the sig-
nal generator for operation, position the 115-230 volt
switch so that the number visible on the slider cor-
responds to the available line voltage, and install a
fuse of
correct r~t\.rZ ~::'!:."r~-:"! on rear apron).
CAUTION
Before connecting the power cable, set the
115-230 volt
switch for the line voltage to be
used.
2-6. POWER CABLE.
2-7. To protect operating personnel, the National
Electrical Manufacturers' Association (NEMA) rec-
ommends that the instrument panel and cabinet be
grounded. This instrument is equipped with a three-
conductor power cable Which, when plugged into an
appropriate receptable, grounds the instrument. The
off-set pin of the three-prong connector is the ground
pin.
To preserve the protection feature when operating
the instrument from a two-contact outlet, use a three-
prong to two-prong adapter (Hewlett- Packard Stock No.
1251-0049) and connect
the green pigtail on the adapter
to ground.
2-8. REPACKING FOR SHIPMENT.
2-9. If the signal generator is to be packaged for
shipment use the original shipping container and pack-
ing materials. U these have been discarded or are not
in condition
for reuse, obtain new materlals from your
local Hewlett- Packard sales and Service Office (see
rear of this manual for locations), or follow these
general instructions:
a. Wrap the signal generator in heavy paper or
plastic. (IT the signal generator is being shipped to a
Hewlett-Packard service facility, attach a tag indicat-
ing type of servicing required, return address, model
number, and full serial number.)
b. Use a strong shipping container. A carton made
of 500-600 DOUnd test material will usually provide
adequate protection.
c. Use enough shock-absorbing material (3 to <4
inch layer) around all sides of instrument to provide
firm cushion and prevent movement inside the con-
tainer. Protect the control panel with cardboard.
With Hewlett-Packard "noater pack" packaging, the
foam
blocks prOVide sufficient shock protection, and
additional
material is unnecessary.
d. Seal the shipping container securely.
e. Mark the shipping container "FRAGILE" to
assure careful handling.
2-10.
In any correspondence refer to the signal gen-
erator by model number and full serial number.
2-1