Copyright - Agilent Technologies, Inc. Reproduced with the permission of Agilent
Technologies Inc. Agilent Technologies, Inc. makes no warranty of any kind with regard
to this material including, but not limited to, the implied warranties of merchantability
and fitness for a particular purpose. Agilent Technologies, Inc. is not liable for errors
contained herein or for incidental or consequential damages in connection with the
furnishing, performance, or use of this material or data.
CERTIFICATION
The Hewlett-Packard Company certifies that this instrument was
thoroughly tested and inspected and found to meet its published
specifications when it was shipped from the factory. The Hewlett-
Packard Company further certifies that its calibration measurements
are traceable to the U. S. National Bureau
allowed by the Bureau’s calibration facility.
of
Standards to the extent
WARRANTY AND ASSISTANCE
All Hewlett-Packard products are warranted against defects in
materials and workmanship. This warranty applies for one year from
the date of delivery, or, in the case of certain major components listed
in the operating manual, for the specified period. We will repair or
replace products which prove to be defective during the warranty
period. No other warranty is expressed or implied. We are not liable
for consequential damages.
For any assistance contact your nearest Hewlett-Packard Sales and
Service Office. Addresses are provided at the back of this manual.
6-3. Code List of Manufacturers . . . . . . . . . . 6-22
. . .
111
Section I
Table l-l
Model 214A
Table l- 1. Specifications
1
OUTPUT PULSE
Source Impedance:
lower ranges: approximately 1500 ohms on the
lOO-volt range.
Pulse Shape
Rise and Fall Time: <13 nsec on 20-volt and
lower ranges and the -50 volt range, < 15 nsec
on the +50 volt range.
with vernier set for maximum attenuation.
1OOV range typically 15 nsec.
Pulse Amplitude:
attenuator provides 0.2 to 100 volts in a 1,2,
5, 10 sequence (9 ranges). Vernier reduces
output of 0.2~ setting to 80 mv and provides
continuous adjustment between ranges.
Polarity: Positive or negative.
Overshoot: < 50/o, both leading and trailing edges.
Pulse Top Variations: < 4%.
Droop: < 6%.
Preshoot: < 2%.
Pulse Width: 50 nsec to 10 ms in 5 decade
ranges. Continuously adjustable vernier.
Width Jitter: < .05% of pulse width + 1 nsec.
50 ohms on the 50-volt and
Typically < 10 nsec
100 volts into 50 ohms. An
External
Repetition Rate: DC to 1 MC
Sensitivity: < 0.5~ pk
Slope: Positive or negative
Level: Adjustable from -40~ to +4Ov.
Delay: Delay between input trigger and leading
edge of pulse out is approximately 250 nsec in
Pulse Advance mode (approx. 420 nsec minimum in Pulse Delay mode).
External Gating: +8 volt signal gates pulse gen-
erator on. Maximum signal, +4Ov peak.
Double Pulse
Minimum Spacing: 1 usec on the .05 to lksec
pulse width range.
upper limit of Width range.
Trigger Output
Amplitude: > 1Ov open circuit.
Width: 0.05 psec, nominal.
Polarity: Positive or negative.
GENERAL
Maximum Duty Cycle: 10% on 100 and 50 volt
ranges; 25% on 20 volt range; 50% on 10 volt
and lower ranges.
Power: 115 or 23OvilO%, 50 to 60 cps,
Dimensions:
On all other ranges 25% of
325
watts.
Pulse Position: 0 to 10 ms advance or delay,
with respect to trigger output (5 decade ranges).
Continuously adjustable vernier.
Position Jitter: < 0.05% of advance or delay
setting +l ns (between trigger pulse and output
pulse).
REPETITION RATE AND TRIGGER
Internal
Repetition Rate:
continuously adjustable vernier.
Rate Jitter: < 0.5% of the period.
Manual: Push button single pulse, 2 cps maxi-
mum rate.
10 cps to 1 MC (5 ranges),
Weight:
(19,6 kg).
Net 35 lbs. (15,8 kg). Shipping 48 lbs.
J
1-o
02056-3
Model 214A
Paragraphs l-l to l-4
Section I
SECTION I
GENERAL INFORMATION
l-l. INSTRUMENT DESCRIPTION.
1-2. The m@$ Model 214APulseGenerator (Figure l-l)
is a versatile instrument providing variable repetition rate, variable width, variable amplitude, positive or negative, pulses with a rise and fall time of
less than 15 nanoseconds. The complete specifications are given in Table l-l. Pulse power of up to
200 watts is available when using a 50-ohmload. The
Model 214A output impedance matches an external
system of 50 ohms on all ranges of 50 volts amplitude
and below, thus minimizing reflections. The maxi-
mum pulse amplitude is 100 volts (with a source
impedance of 1500 ohms) and the amplitude may be
set as low as 80 millivolts using the vernier and the
lowest range. For pulse amplitudes of 10 volts and
less, the duty cycle may be set as high as 50% (see
Table l-l for duty cycle limits at other amplitudes),
providing a square wave output.
l-3. Pulses may be obtained from the Model 214A
at a rate of dc to 1 MC using an external trigger source
or from 10 cps to 1 MC with an internal generator.
For external triggers, positive or negative signals
of 0.5 volt peak may be used and trigger slope and
level may be selected to determine the triggering
point on the waveform. A single pulse may be obtained
from an internal circuit each time a manual button
is pushed. Gating of pulses is done easily by applying
an external signal and an output occurs only when the
gating signal reaches a positive 8 volt level. Three
modes of pulse operation allow: (1) setting of the
output pulse to occur from 0 to 10 ms before (advance)
the trigger output, (2) setting of the output pulse to
occur from 0 to 10 ms after (delay) the trigger output,
or (3) a double pulse output with variable spacing
between the two pulses.
l-4. The Hewlett-Packard modular instrument enclosure system provides advantages in maintenance
and operation. Easy removal of instrument covers
allows access to all chassis and circuit components.
As a bench type instrument the modular design provides mechanical stability even when several instruments are stacked together. The bench type instrument is readily converted for use in standard width
02056-l
Figure l-l. Model 214A Pulse Generator
l-l
Section I
Paragraphs l-5 to l-10
Model 214A
rack using hardware shipped with the instrument.
Paragraph 2-11 explains the details of converting to
either the rack or bench version,
l-5. INSTRUMENT APPLICATIONS.
l-6. With its variable pulse characteristics the
Model 214A is useful as a general purpose laboratory
or production line test instrument.
The high peak
current output available, 2 amps, is useful for testing
current driven devices such as magnetic memory
cores, high power modulators, and power amplifiers.
Fast rise and fall time combined with highpower out-
put pulses facilitate checking switching time of high
power semiconductors. The positiveor negative pulse
output, with identical characteristics, provides an
easy technique for checking either npn or pnp type
transistors. By gating the Model 214A output, a
burst of pulses may be obtained for making computer
logic measurements. The double pulse feature may
also be used for pulse resolution tests of amplifiers
and memory cores.
l-7. EQUIPMENT AND ACCESSORIES
AVAILABLE.
l-8. A complete line of electronic test equipment
is available from the Hewlett-Packard Company for
use in making test measurements with, or maintaining, the Model 214A. Also available are cables,
connectors, adapters and other accessory items for
use in various test or measurement applications.
For information on specific items, consult the &?
Catalog or your @ Field Engineer.
1-9. DIFFERENCES BETWEEN INSTRUMENTS.
l-10. The Hewlett-Packard Company uses a two-
section, eight-digit serial number to identify instruments (e.g. ~-00000). The serial number is located
on a plate attached to the instrument rear panel. The
first three digits are a serial prefix number, also
appearing on the first page of this manual, and the
last five digits identify a specific instrument. If the
serial prefix number of the instrument is higher than
that on the first page, change sheets included with the
manual will define differences between other instru-
ments and the Model 214A described herein. If the
change sheets are missing, your @J Field Engineer
can supply the information. Refer to Appendix I at
the back of this manual for changes required to adapt
this manual to an instrument with a lower serial
prefix.
Model 2 14A
SECTION II
PREPARATION FOR USE
2-1.
INIT
IAL INSPECTION.
2-2.
Upon receipt of the Model 214A, verify that
the contents are intact and complete as ordered.
Inspect the instrument for any physical damage such
as a scratched panel surface, broken knob or connector,
possible reshipment,
material if reusable (see Paragraph 2-15), until a
satisfactory operational check (Paragraph 5-3) is
completed. If damage is found, file a claim with
the freight carrier and refer to the warranty page in
this manual. Section V outlines the recommended
adjustment and troubleshooting procedures needed
for normal maintenance or recalibration.
2-3. AC POWER CONSIDERATIONS.
2-4. POWER SOURCE REQUIREMENTS.
2-5. The Model 214A may be operated from an ac
source of 115 or 230 volts (&lO%), at 50 to 60 cps.
With the instrument power cord disconnected, move
the slide switch (located on the rear panel) until the
desired voltage numbers (115 or 230) are visible. A
narrow-blade screwdriver may be used to operate
the switch. Fuse Fl (holder on rear panel) should be
3.2 amperes, slow-blow for 115~ operation or 1.6
amperes, slow-blow for 230~ operation.
2-6. THREE-CONDUCTOR POWER CABLE.
2-7. To protect operating personnel, the National
Electrical Manufacturers’ Association (NEMA) re-
commends that the instrument and cabinet be grounded.
The Model 214A is supplied with a detachable three-
conductor power cable which, when plugged into an
appropriate receptacle, grounds the instrument to
the power line ground. The round pin on the power
cable is the ground connection. To retain the protection feature when operating the instrument from
a two-contact outlet, use a three-conductor to twoconductor adapter and connect the adapter wire to a
suitable ground.
2-B. VENTILATION REQUIREMENTS.
2-9.
GENERAL. The cooling fan and air filter are
located on the rear panel of the Model 214A. Leave
adequate clearance (at least 2 to 3 inches) behind and
at both sides of the instrument for free movement of
air. The path of air flow is through the filter and
intake fan then out of the perforated side covers. It
is important to keep the air intake area free of dust
and small particles which could clog the filter.
Section V provides maintenance information for fan
and filter. In a rack installation be sure that recirculation of warm air within the rack cabinet does
not produce an ambient temperature high enough to
affect instrument operation.
02056-l
incurred in shipping. To facilitate
etc.,
keep the original packing
Paragraphs 2-1 to 2-1’7
Section II
2-10. COATING FILTER. Before placing the instrument in use, the air filter should be coated with a
filter adhesive preparation. A recommended pre-
paration is No. 3 Filter Coat, made by Research
Products Company, and available in sprayer cans at
heating-supply stores. This may also be obtained by
contacting your @ Field Engineer (see maps at back
of this manual) or by ordering directly from @
Customer Service. Hewlett-Packard stock number
is 3150-0002.
2-11. RACK/BENCH CONVERSION.
2-12. The Model 214A is shipped as a bench-type
instrument (even when ordered as a rack type) with
plastic feet and tilt stand in place. The @ modular
instrument enclosure system allows easy conversion
to either bench or rack
mode.
Refer to the appropri-
ate following procedure for conversion.
2-13. CONVERSION TO RACK MODEL.
a. Detach the tilt stand and all the plastic feet.
Tilt stand removes by pressing away from the front
feet. Remove feet by depressing metal release
button and sliding feet free.
b. Using a thin-blade tool, loosen and remove the
plastic trim strip (with adhesive back) from eachside
of the instrument (directly behind front handles).
Removal of strip exposes threaded nuts pressed in
the side casting.
c. Attach the rack-mounting flanges, with the screws
provided, in the space where the trim strip was
adhered. Each flange extends slightly below the
front panel when attached correctly.
d. If the instrument is to be placed in a rack above
or below another @ modular instrument, attach the
filler strip between the front panels. Insert Model
214A in the rack and secure flanges to rack.
2-14. CONVERSION TO BENCH.
a. Remove instrument from rack, detach rackmounting flanges and filler strip, if used between
front panels.
b. Attach trim strip (in slots where rack flanges
were located), plastic feet, and tilt stand. A fifth
plastic foot at center-front of the instrument provides
extra stability when the Model 214A is stacked atop
another @ modular bench-type instrument.
2-15. REPACKAGING FOR SHIPMENT.
2-16. PACKAGING SUGGESTIONS.
2-17. To package an instrument for shipment, some
types of original packing materials may be reused,
or your @ Field Engineer will provide assistance in
obtaining suitable packaging. The types of original
2-l
Section II
Paragraphs 2-18 to 2-19
Model 214A
packing materials which may be reused are: (1) foam
enclosure pads, (2) cardboard layers separated by
foam supports, and (3) laminated cardboard cut to
desired packing shape. Original packing materials
which are a cardboard “accordion-like” filler are
not recommended for shipment since the useful
cushioning qualities are usually gone after one use.
If packing materials listed above are not available,
first protect the instrument surfaces with heavy
paper or sheets of cardboard flat against the instru-
ment. Then place instrument in a durable carton,
pad all sides with approximately 4 inches of new
packaging material designed specifically for package
cushioning, mark carton clearly for proper handling,
and insure adequately before shipping.
2-18. RETURNING FOR SERVICE OR REPAIR.
2-19. Contact your Hewlett-Packard Company Field
Office for shipping instructions. All correspondence
should refer to an instrument by model number and the
full (eight-digit) serial number.
2-2
02056-l
Model 214A
Section III
Paragraphs 3-l to 3-8
SECTION III
OPERATING INSTRUCTIONS
3-1. GENERAL.
3-2. The Model 214A is self-protected and no combination of front panel control settings or connections
to external circuits can damage the instrument, providing the overload relay circuitry is operating properly.
duty cycle specified in Table l-l are exceeded. The
limits and combinations of settings which result in an
overload indication are described in Paragraph 3-4.
Other specific operating considerations are given in
Paragraphs 3-7 and 3-9. Figure 3-3 illustrates and
explains the function of all the front panel fixtures.
The ac power connector, fuse, and line voltage switch
are on the rear panel. Proper fusesize is: 3.2 amps
slow-blow for 115~ and 1.6 amps slow-blow for 230~
operation. Setting line switch and other ac power
information is given in Paragraph 2-3.
3-5.
panel control settings. Duty cycle is defined as the
ratio of duration of pulse (i.e. pulse width) to the
total duration of one complete cycle. Figure 3-1
shows the relationship which determines the duty cycle.
The time for one cycle is defined as the period, and
the period is related to repetition rate by:
Thus the product of pulse width and frequency times
100 determines the percent duty cycle. For example
if INT. REP. RATE is set to l-10, VERNIER set to
give a rate of 6 kc (or if the external trigger rate is
6 kc), and PULSE WIDTH and VERNIER are set to
give a pulse 70 psec wide, the percent duty cycle is:
The same limits on duty cycle apply for external
An overload will be indicated if the limits on
Duty cycle of operation is determined by front
Period -
(70 x 10-6) (6 x 103) x 100 = 42%
1
Rep Rate
trigger operation or internal repetition rate. The
limits are 50% for PULSE AMPLITUDE settings of
10 volts or less, 25% on 20 volts amplitude, and 10%
on 50 to 100 volt amplitude. The maximum duty
cycle will decrease slightly at repetition rates slower
than 20 cps on the 5Ov and 100~ PULSE AMPLITUDE
ranges.
relay reacts if there were a higher average voltage
than that actually present.
3-6. If maximum duty cycle is exceeded for any
pulse amplitude, the front panel light, OVERLOAD,
will flash on and off and an internal relay will be heard
as a clicking sound. No damage will occur to the
instrument when this overload circuit is operating
properly. When an overload is indicated it may be
stopped by reducing either the frequency or the PULSE
WIDTH setting. Usually this may be done easiest by
turning the Width VERNIER counterclockwise, or by
reducing the Width range setting. In DOUBLE PULSE
operation the duty cycle limit is one half that for
PULSE ADVANCE or PULSE DELAY. The expression
for duty cycle using DOUBLE PULSE is given in
Figure 3-2.
At these slow repetition rates the overload
11 n r--/-
~-PEl%N--~
t------
P/EK&ENCY
-----I
r-------1
I
%DUTY CYCLE = ‘“‘&l”ob”‘” x 100
:
PULSE WIDTH X FREQUENCY X 100
Figure 3-l. Defining Pulse Characteristics
02056-l
I
I
I
I.--
z,..-.-
% DUTY CYCLE= 2 ’ PULSE W’DTH X 100
= 2 X PULSE WIDTH X FREOUENCY X 100
Figure 3-2. DOUBLE PULSE Operation
3-7. PULSE POSITION VS. RATE.
3-8. In either PULSE ADVANCE or PULSE DELAY
operation, the PULSE POSITION setting should always
be less than the period (i.e. 1 divided by the frequ ency) .
the period is:
and the PULSE POSITION range combined withVERNIER setting should not exceed40 psec. For DOUBLE
For example if the repetition rate is 25 kc,
Period = 25 kc = 40 ysec
PERIOD
2141--*-
1
3-l
Section III
Figure 3-3
Model 214A
I- i
SLOPE.Allows setting for triggering to
1.
occur on either negative-going or positivegoing slope of external trigger-source waveform.
TRIGGER INPUT. Connector for external
2.
triggering signals.
3. EXT. TRIG. LEVEL. Sets voltage level on
external trigger-source waveform at which
triggering occurs.
4. GATE INPUT (+). Connector for gating volt-
age which then allows pulse outputs only when
input is at +8 volts or more; 40V maximum.
5. NORM./GATED. Set to GATED when the
duration of pulse output is to be controlled
by a gating voltage.
6. PULSE ADVANCE/PULSEDELAY/DOUBLE
PULSE. Set to PULSE ADVANCE for pulse
output before trigger output. Set to PULSE
DELAY for pulse output after trigger output.
DOUBLE PULSE gives two pulses atoutput.
7. TRIGGER OUTPUT polarity. Determines
polarity of trigger output pulse.
8. TRIGGER OUTPUT connector. Provides 10
volt synchronizing pulses across 1000 ohms.
9. OVERLOAD. Indicator lights when duty
cycle limit is exceeded.
10. PULSE OUTPUT polarity.
polarity of main pulse output.
11. PULSE OUTPUT connector. Provides output pulse with characteristics set by front
panel controls (see Table l-l for specifi-
cations).
3 4 6 i 6
Determines
IO II
12. POWER switch and indicator. Switch controls ac power to instrument; indicator lights
in ON position. 115-230 volt switch on rear
panel.
13. PULSE AMPLITUDE. Controls amplitude
range of pulse output.
14. VERNIER. Provides continuous overlapping
adjustment between setting of PULSE AMPLITUDE and next lower range.
15. PULSE WIDTH. Changes limits of VER-
NIER control over output pulse width.
16. VERNIER. Provides continuous, semicalibrated, adjustment between limits set
by PULSE WIDTH switch.
17. PULSE POSITION. Changes limits ofVERNIER control over output pulse position with
respect to the trigger output pulse.
18. VERNIER. Provides continuous, semi-
calibrated, adjustment between limits set
by PULSE POSITION switch.
19. INT. REP. RATE. Changes limits of VER-
NIER control over internal repetition rate
circuit.
20. VERNIER. Provides continuous adjustment
between limits set by INT. REP. RATE
switch.
21. TRIGGER MODE. Selects mode of generat-
ing pulses. MANual push button, EXTernal
trigger source, or INTernal repetition rate.
22. MANUAL. Pushbutton provides singlepulse
output when TRIGGER MODE is set to MAN.
3-2 02056-2
_--...
Model 214A
Paragraphs 3-9 to 3-19
Section III
PULSE operation, the minimum allowable PULSE
POSITION setting depends on the PULSE WIDTHused;
this is explained in Paragraph 3-9.
3-9. MINIMUM SPACING WITH DOUBLE
PULSES.
3-10. In DOUBLE PULSE operation, the PULSE
POSITION control sets the spacing between the start
of the first pulse and the start of the second pulse.
For proper operation without affecting pulse shape,
there are minimum spacing limits between the two
pulses, and these limits depend on the PULSE WIDTH
setting.
between pulses is 1 psec. For other PULSE WIDTH
settings, the minimum spacing is 25% of the upper
limit of range selected. For example, if PULSE
WIDTH is set to 100-lK, the minimum spacing
between pulses is 25% of 1K microseconds, or 250
microseconds.
characteristics as set by the Model 214A controls in
DOUBLE PULSE mode. Note from Figure 3-2 that
the setting of PULSE POSITION and PULSE WIDTH
controls the actual spacing between pulses. The
spacing between pulses is then the PULSE POSITION
setting minus the PULSE WIDTH setting.
3-11. GATING OF PULSES.
3-12. By applying a positive signal voltage to the
GATE INPUT (+) connector and sliding the switch to
GATED, pulses will occur at the output only when the
gating signal is at +8 volts or greater. The maximum
gating signal amplitude is +40 volts. To ensure that
output pulses occur when the gate signal just reaches
+8v, a fast rise time input should be used. If a gating
sine wave signal is used, a larger amplitude (but less
than 40 volts peak) will generally provide better results.
and repetition rate must be locked together. Figure
3-4 illustrates the result of gating the pulse output.
3-13. OPERATING PROCEDURES.
3-14. MANUAL TRIGGER MODE.
3-15. When TRIGGER MODE is set to MAN. and the
MANUAL button is pushed, a single pulse output will
occur. Other front panel controls are set to obtain
For a 0.05-l setting the minimum spacing
Figure 3-2 shows the output pulse
For synchronized pulse trains, the gating signal
the desired pulse characteristics. The same operating
considerations apply as explained in Paragraphs 3-4,
3-7, and 3-9. The maximum rate for pushbutton
pulses is 2 cps.
3-16. EXTERNAL TRIGGER MODE.
3-17. With TRIGGER MODE set to EXT., an external
triggering signal from dc to 1 MC with 0.5 volts peak
amplitude is required to generate pulses in the Model
214A.
proceed as follows:
to TRIGGER INPUT.
gering level on input waveform. Polarity of EXT.
TRIG. LEVEL must agree with SLOPE setting.
using an external gating signal.
DELAY/DOUBLE PULSE. PULSE ADVANCE or
PULSE DELAY means the output pulse will occur
advanced or delayed in time, with respect to the
trigger output pulse. DOUBLE PULSE provides two
pulses out at a rate determined by the TRIGGER
MODE circuits.
nect coaxial cable to external circuit being triggered.
these amplitudes are volts into a 50 ohm load at the
PULSE OUTPUT connector. The 100 v range will not
produce a pulse without the 50 ohm termination.
NIER. Observe duty cycle limit for amplitude range.
coaxial cable to external test circuit.
NIER as desired. With PULSE ADVANCE or PULSE
DELAY operation. PULSE POSITION setting is the
spacing between the pulse output and the trigger output
pulse. With DOUBLE PULSE, PULSE POSITION sets
the spacing between the two pulses.
position, width, and amplitude characteristics.
Refer to Paragraphs 3-4, 3-7, and 3-9 and
a. Set TRIGGER MODE to EXT. and connect signal
b. Select + or - SLOPE setting.
c. Set EXT. TRIG. LEVEL to obtain desired trig-
d. Set GATED/NORM. switch to NORM. unless
e. Select setting for PULSE ADVANCE/PULSE
f. Select polarity of TRIGGER OUTPUT and con-
g. Select PULSE AMPLITUDE range. Note that
h. Select PULSE WIDTH range and adjust VER-
i. Select polarity of PULSE OUTPUT and connect
j. Select PULSE POSITION range and adjust VER-
k. Adjust VERNIERS if necessary to obtain exact
nnnnnnn nnn
MODEL 214A PULSE OUTPUT
2 I
GATE INPUT SIGNAL
Figure 3-4. Gating Pulse Output
02056-3
1
214*-*-
3-18. INTERNAL TRIGGER MODE.
3-19. With TRIGGER MODE set to INT.. the Model
214A will generate pulses at a rate set by the INT.
REP. RATE range and VERNIER. This repetition
rate is adjustable from 10 cps to 1 MC. Refer to
Paragraphs 3-4, 3-7? and 3-9 and proceed as follows:
a. Turn instrument POWER switch to ON and allow
several minutes for warmup.
b. Set TRIGGER MODE to INT.
c. Set INT. REP. RATE range and VERNIER to
approximate position for frequency desired (maximum frequency is fully clockwise).
d. Complete steps d through k of Paragraph 3-16.
3-3
El 00,
.4 /iSEC
+
0,
DELAY
CIRCUIT
V2028 B DL201 --o V203 El T202
0,
\
\
POSITION POSITION
MONOSTABLE
b-+ MULTIVIBRATOR -
V20lA,V202A,
VI048
--oI \-
0
,-. l
\
\
BLOCKING
OSCILLATOR
VZOIB 8 T201
\
TRIGGER
OUTPUT
BLOCKING
OSCILLATOR
-\
\
\
\ ’
<
\
-c* DIODE
<
/
\
[PULSE DELAY 1
lDOuBLE PULSE 1
\
\
\
1
CR208
, DIODE -
CR207
PULSE ADVANCE
\
\
,-
0
START
1
1 v204A 8. DL202 1 1 V205A 8 T203 1 1 1
I
PULSE
Q’ “‘;KING
1ATl-N
1 I
STOP SIGNAL
Figure
,;;;iR
V301 8. T301
1
I
4-l. Model 214A Block Diagram
BISTABLE
MULTIVIBRATOR
AND POWER
AMPLIFIER
v304, v305,0301
POLARITY
AND
ATTENUATION
Model 214A
Paragraphs 4-l to 4-12
SECTION IV
PRINCIPLES OF OPERATION
4-1. GENERAL. 4-7. MANUAL TRIGGER OPERATION.
4-2. The complete circuit operation is shown in
Figure 4-1.
lowing general sequence: a trigger pulse from the
rate circuit (VlOZ), functioning either as a Schmitt
trigger or an astable multivibrator, is applied to
blocking oscillator V103, which triggers both the
Position Multivibrator (V201A, VZOZA, V104B) and
blocking oscillator V203 for the trigger output pulse.
The position Multivibrator triggers Position Blocking
Oscillator V201B which in turn triggers both start
and stop pulse circuits.
are used to switch a bistable multivibrator-power
amplifier combination (V304, V305, Q301) which
forms the output pulse. The details of each block
are contained in the schematics, and the following
circuit description explains the operation of each
circuit, both as to basic type and to the part it plays
in the sequence of forming the output pulse.
4-3. INPUT AND RATE GENERATOR.
4-4. EXTERNAL TRIGGER OPERATION.
4-5. With TRIGGER MODE set to EXT. position, a
signal of at least 0.5 volts peak will cause Differential
Amplifier VlOl to amplify the difference between the
levels at the control grids, pins 2 and 7. TRIGGER
SLOPE switch SlOl routes the trigger input to one
grid of VlOl and also transfers the external trigger
level circuit of R105 to the other grid. Resistor R105
sets the grid bias which must be overcome by the
trigger input at the other grid to obtain an output at
the plate, pin 6 of V101. The output from VlOl is
coupled through S103A, through a low-impedance
network (DSlOl, R116, and C107), and S103B to R125
and the grid of V102.
The output pulse is formed by the fol-
The start and stop pulses
4-8. With TRIGGER MODE set to MAN. position,
V102 again functions as a Schmitt Trigger circuit as
in external operation, with the parallel RC network
R129-Cl10 coupling between plate and grid. When
MANUAL switch S102 is energized, the side of capacitor Cl06 toward the switch charges toward +150 volts
through R120. This positive-going, slow rising ex-
ponential voltage is coupled to the grid (pin 2) of V102
and the left half of the tube conducts. The right half
of V102 now cuts off and a positive pulse to +15OV is
the output coupled to the grid of V103.
4-9. INTERNAL TRIGGER OPERATION.
4-10. With TRIGGER MODE set toINT. position, V102
functions as an astable multivibrator. The free-
running rate of this circuit is controlled by range
capacitors, Cl13 through C117, couplingbetweenplate
(pin 1) and grid (pin 7), and by VERNIER, R137.
Breakdown diode CR101 sets the bias at the grid of
the left half of V102. This circuit has no stable state
and is always changing between two states: (1) lefthalf cutoff, right-half conducting or (2) left-half conducting, right-half cutoff. The rate at which this
changing of states occurs is primarily a function of
the capacitors between plate and grid since this determines the exponential rise and decay time of the
grid (pin 7). When the grid (pin 7) voltage rises
exponentially enough to cause the right half to conduct,
the output at pin 6 is about +125 volts. Then as the
voltage at pin 7 decays exponentially, the right half
cuts off and the output at pin 6 is at the supply voltage,
+15Ov. A regenerative action occurs as the right half
of V102 just starts to conduct and the left half starts
to cutoff: the increase in voltage at the plate (pin 1)
is coupled through the range capacitor to speed turn
on of the right half. Symmetry Adjust, R133, changes
the grid bias of pin 7 to nearly equal the bias at pin 2
making the two halves of the waveform equalin width,
Section IV
4-6. In external trigger operation, V102 functions
as a cathode-coupled binary, or Schmitt Trigger,
circuit. The plate to grid coupling network is from
pin 1 through S103B and the parallel RC combination,
R129-C110, to the grid, pin 7. The left half of V102
is normally off and the right half conducting so the
output at pin 6 is at a positive level (about 125 volts),
less than the +150 supply. As the signal at pin 2
becomes positive enough (upper hysteresis limit),
the left half of V102 conducts and regenerative action
cuts the right half off. When the input at pin 2 decreases enough (lower hysteresis limit), the left half
of V102 is cut off and the circuit returns to the original
state. The output at pin 6 then is a positive pulse each
time the signal at pin 2 causes the left half to conduct,
and the rate at which this occurs is exactly that of
the external trigger signal (1 MC limit on input frequency). The output pulse from pin 6 is coupled
through Cl22 to pin 2 of Blocking Oscillator V103.
02056-2
4-11. TRIGGER BLOCKING OSCILLATOR.
4-12.
Tube V103 and transformer TlOl function as an
amplifier-blocking oscillator, when the output of
V102 is not being gated by the circuit of V104A (see
Paragraph 4- 13). Normal operation of the blocking
oscillator is as a monostable circuit being triggered
by an amplified signal. The left half of V103 amplifies
the positive pulse at its grid and the resulting plate
pulse is coupled through transformer TlOl, reversed
in phase, to the grid of the right half. This puts the
right half of V103 in conduction and a regenerative
action drives the plate (pin 6) voltage down abruptly
and the grid voltage (pin 7) abruptly positive. Next
the action reverses and as the plate voltage becomes
more positive, the grid goes negative and regeneration
turns the tube off agian. The output is taken from the
cathode (pin 8) and the pulse drives other circuits de-
pending on which pulse mode (advance, delay, or
double) is used (see Paragraph 4-15).
4-l
Section IV
Paragraphs 4-13 to 4-30
Model 214A
4-13. GATE INPUT CIRCUIT.
4-14. When switch S105 is in the NORM. position,
Gate Cathode Follower V104A is conducting enough so
CR103 is biased off, and the pulse at pin 2 of V103 is
unaffected in operation.
However, when S105 is moved
to GATED, V104A is cut off, biasing the cathode of
CR103 more negative than its anode and CR103 conducts, changing V103 input impedance so the rate pulse
does not develop enough signal to trigger the blocking
oscillator. By applying a positive signal of at least
8 volts (but less than 40) V104A will again conduct,
cutting off CR103 and the pulse at V103 triggers the
blocking oscillator (explained in Paragraph 4-l 1).
4-15. ADVANCE, DELAY, DOUBLE PULSE
MODES.
4-16. Three modes of pulse operation are obtained
by switching the timing pulse from the Trigger Blocking Oscillator V103 through combinations of circuits.
These circuits are described below first in terms of
general operation (Paragraphs 4-17 through 4-26)
and second, as each is used in either PULSE AD-
VANCE, PULSE DELAY, or DOUBLE PULSE (Para-
graphs 4-27 through 4-32).
4-17. PULSE POSITION CIRCUIT.
4-18. POSITION MULTIVIBRATOR. The circuits of
tubes V201A and V202A form a monostable multi-
vibrator which controls the position relationship between the output pulses and trigger output or between
both output pulses in DOUBLE PULSE operation. This
multivibrator substitutes cathode-coupling with a
common cathode resistor for the usual coupling between plate of V202A and grid of V201A, but still is
a monostable circuit. The width of the multivibrator
pulse is controlled by range capacitors, C201 through
C205, and the VERNIER control R207. By controlling
the time V202A is cut off, with the range capacitor
and VERNIER, the delay before triggering theposition
blocking oscillator V201B is also controlled (V201B
is triggered as V202A starts conducting; see Para-
graphs 4- 19). Tube V104B acts as a screen biasing
supply for V202A.
The output at pin 9 of V202A is a
variable width positive pulse which is coupledthrough
C209 to pin 6 of V201B.
4-19. POSITION BLOCKING OSCILLATOR. The signal from V202A triggers Position Blocking Oscillator V201B at the plate. This signal is coupled
through T201 to the grid (pin 7) and the circuit functions
in the same way as V103 right half, described in
Paragraph 4-11. The output is takenfromthe cathode
as a positive pulse about 30 volts in amplitude.
4-20. PULSE WIDTH MULTIVIBRATOR.
4-21.
The circuits of tubes V206A and V204B form a
monostable, cathode-coupled multivibrator, and the
circuit functions the same as that described in Paragraph 4-18. The time for whichV204Bremains cutoff
is determined by range capacitors C225 through C229
and VERNIER, R257. The output at pin 9 of V204B is
used to drive the stop pulse blocking oscillator V206B
(see Paragraph 4-26). The time delay obtained from
the width multivibrator thus determines how long since
4-2
the output pulse started before the stop pulse blocking
oscillator returns the pulse to zero (this time is the
pulse width).
4-22. TRIGGER OUTPUT BLOCKING
OSCILLATOR.
4-23. Tube V203 and transformer T202 function as an
amplifier-blocking oscillator in a nearly identical
circuit as described in Paragraph 4-11 for the circuit
of v103.
A signal at pin 2 of V203 is amplified and
coupled from the plate through T202 to the grid of the
right half. For a positive trigger output, S203 routes
the cathode signal to 5201 and for a negative trigger
out, S203 routes the signal from pin 1 of T202 to 5201.
4-24. START-STOP PULSE BLOCKING
OSCILLATORS.
4-25. START PULSE BLOCKING OSCILLATOR. The
circuit of V205A and T203 is another blocking oscillator working the same way as described in Paragraph 4-11. The signal which triggers V205A plate
has been amplified by V204A and delayed by 0.14
microseconds by DL202. The output from thecathode
of V205A is a positive pulse of about 35 volts which
drives the input to V301.
4-26. STOP PULSE BLOCKING OSCILLATOR. The
blocking oscillator of V206B and T204 also is of the
same type already described in Paragraph 4-11. The
signal to trigger V206B comes from the width multivibrator circuit when V204B starts conducting. The
output from the cathode of V206B is a positive pulse
of about 35 volts and it drives the input to V303, the
Stop Pulse Spiker.
4-27. PULSE ADVANCE TIMING LOGIC.
4-28. Figure 4-2 shows the timing logic for PULSE
ADVANCE mode of operation. The timing pulse from
V103 goes directly through diode CR207 to the start-
stop pulse circuits (through V204A to V205A, and
through the width multivibrator to V206B). The timing
pulse also goes through CR201 to the grid of V201A
to operate the position multivibrator. The resulting
waveform from the position blocking oscillator is
coupled through C216 to pin 2 of V203. Now the posi-
tion multivibrator is used to effectively delay the trig-
ger output, i.e. the main pulse output occurs in
advance of the trigger.
The pulse width multivibrator
and start-stop pulse blocking oscillators function the
same as described previously.
4-29. PULSE DELAY TIMING LOGIC.
4-30. Figure 4-3 shows the timing logic for PULSE
DELAY mode of operation. The V103 timing pulse
goes directly to Cathode Follower V202B andis taken,
delayed by 0.4 microseconds by DL201, throughS202B
to the trigger output blocking oscillator, to cause a
trigger output pulse. The timing pulse has also triggered theposition multivibrator circuit throughCR201.
The output from V201B goes through CR208 and S202B
to the width multivibrator and start-stop blocking
oscillators.
This time the position multivibrator has
been used to effectively delay the start of the pulse
output with respect to the trigger output.
4-32. Figure 4-4 shows the timing logic for DOUBLE
PULSE mode of operation. The V103 timingpulse goes
directly through CR201 to the position multivibrator
and directly through CR207 to the start pulse and stop
pulse circuitry (i.e. through V204A and also through
the width multivibrator). This causes one pulse output. Then the delayed timing pulse from the position
multivibrator and blocking oscillator comes through
CR208 to trigger the start-pulse circuitry a second
time and another pulse output is formed. The delayed
timing pulse from V201B determines the position in
time at which the second pulse occurs (i.e. the time
between leading edge of pulses). The pulses have the
same variable width since both are controlled by the
width multivibrator.
4-33. FORMING AND CONTROLLING
OUTPUT PULSE.
4-34. The fast rise and fall time of the output pulse is
achieved by rapid charging of the input capacitance
represented by the grid of tubes V304 and V305, then
02056-l
rapidly discharging this capacitance to end the pulse.
A large current spike waveform is used and the output
tubes are held on during the pulse by a bistable type
multivibrator circuit. The amplitude of the output
pulse is controlled by varying the output tube screen
supply, by changing the bias levels of the output circuits, and some attenuation at the output,
4-35. START PULSE SPIKER.
4-36. The positive pulse from V205A is coupled
through L301, C301, and CR301 to the control grid of
v301. The input circuit of V301 changes the dc level
of the start pulse and smoothes the transition from
triggered on state to the steady stateduring the output
pulse. Diode CR301 discharges the input circuit after
the start spike occurs and C302 discharges through
R301 to increase the fall time of the spike. The rise
time of the spike is sharpened by clipping diode CR303.
Tube V302A is a screen supply for V301. The output
of V301 is a current spike which is increased to about
0.5 amp by current step-up transformer T301 and
coupled to the input circuit of V304/5 to charge
input capacitance.
up
the
4-3
Section IV
Paragraphs 4-37 to 4-44
Model 214A
SEQUENCE OF EVENTS
DOUBLE PULSE
h
P°K!oN
I
2@ START
SVP21E
PULSE
*K”
v2oie
2~~~r:p h L
v303
PULSE
OUTPUT
Figure 4-4. DOUBLE PULSE Timing Sequence
1
I
214&--B-,
spike input. The steady state cutoff bias of V304/5 is
set by a voltage divider network including breakdown
diode CR326. To keep the output tube conducting after
the start pulse, CR326 is taken out of the breakdown
area by transistor Q301. Transistor Q301 is triggered
on by the other winding of T301 (pins 1 and 2) and held
on by bias developed across CR327 and CR328. This
clamps the collector voltage of Q301 to the emitter,
reducing CR326 voltage to less than breakdown. With
Q301 conducting, V302B now supplies a steady 11 ma
current to keep diodes CR324/5 conducting, holding
V304/5 on.
Then to turn V304/5 off and end the
output pulse, the negative spike from T302 through
the top winding (pins 1 and 2) discharges the input
capacitance rapidly and the other transformer winding
(pins 3 and 4) turns Q301 off. This restores the bias
on CR326 and the circuit returns to its original state,
ready for the next start spike from V301. The output
pulse is taken across a 50 ohm resistancein the plate
circuit of V304/5 for all ranges except 100~. This
50 ohm source impedance, consisting of R405 through
R408 in parallel, absorbs reflections from an external
system mismatch.
4-41. PULSE OUTPUT AMPLITUDE CONTROLS.
4-42. The circuits changedby switch S401 control the
output pulse amplitude in various ways. s401c
switches different breakdown diodes (CR320-322) into
the control grid circuit of the output tubes. S401D
changes the bias on screen supply tube V302A in the
start pulse spiker circuit. S401A and S401B are in
the screen supply for the output tubes and this circuit
also affects the pulse amplitude.
Increasing the
Amplitude VERNIER R360, charges C325 from the
cathode of V307 for a quick response to an increase
in control voltage. To get a quick response for a
decrease in control voltage, V308 discharges C325.
Other sections of S401, at the output, switch in
attenuator resistors on lower pulse amplitudes.
4-37. STOP PULSE SPIKER.
4-38. The positive pulse from V206B is coupled
through L303, and CR308 to the control grid of V303.
The input circuit of V303 is nearly identical to that of
V301 and the same result is obtained in a negative
current spike at the plate. The output of V303 is
coupled by current step-up transformer T302, but
reversed in phase to that from T301 which initiated
the pulse, to the input circuit of V304/5 to discharge
the input capacitance.
4-39. PULSE OUTPUT CIRCUIT.
4-40. Parallel output tubes V304/5 are turned on by
the current spike from the top winding (pins 3 and 4)
of T301 and then held on by a type of bistable multivibrator circuit which includes the output tubes.
Diodes CR324 and CR325 sharpen the rise time of the
4-4
4-43. REVERSING PULSE POLARITY.
4-44. Either positive or negative output pulses are
obtained merely by reversing the connections between
center conductor and shield of the coaxial cable carrying the pulse. Switch S402 reverses these connections. This method of reversing polarity is
pas-
sible because a floating power supply is usedallowing
the ground reference to be established at any level.
Inductors L308, L401, and L402 isolate the voltage
supply and prevent the supply from bypassing the
pulse.
Negative pulse outputs occur when the plates
of the output tubes drive the center conductor of the
coaxial cable and the shield is tied to the OV, isolated
supply reference. Positive pulses occur by reversing
these connections and placing the center conductor
at the OV isolated reference voltage.
02056-l
.l.-l-_. .--”
-_
Model 214A
Paragraphs 5-l to 5-7
Section V
SECTION V
MAINTENANCE
5-1. INTRODUCTION.
5-2. This section covers maintenance, troubleshooting, and adjustment of the Model 214A Pulse
Generator. The performance check, Paragraph 5-3,
may be used in incoming inspection or after adjustments have been made to verify that the instrument
meets its specifications (Table l- 1).
5-3. PERFORMANCE CHECK.
5-4. The performance check is intended to determine whether or not the instrument is operating within
its specifications.
to Paragraph 5-17.
If adjustment is necessary, refer
Test equipment recommended
for the performance check is listed in Table 5-1,
items 1 through 13. Similar instruments having the
listed characteristics may be substituted.
5-5. EXTERNAL GATING.
a. Connect Model 214A PULSE OUTPUT to High
Frequency Oscilloscope Channel A INPUT,
b.
Connect external Power Supply to Model 214A
GATE
INPUT.
C.
Set Model 214A:
INT. REP RATE. . . . . . . . . . . . . l-10
Int. Rep. Rate VERNIER
fully cw
TRIGGER MODE. . . . . : : : : : : . . . INT
GATE INPUT . . . . . . . . . . . . . GATED
PULSE WIDTH. . . . . . . . lo- 100
Width VERNIER . . . . . . . : : : : Midrange
PULSE AMPLITUDE . . . . . . .
PULSE POSITION . . . . . . . . . .
2 VOLTS
lo- 100
Position VERNIER. . . . . . . . . . fully cw
d.
Set Oscilloscope and Plug-In:
SWEEP TIME. , . ,
Channel A SENSITIVITY : : : .
TRIGSOURCE . . . . . . . . . : : . . .
20 &SEC/CM
1 V/CM
INT
e. Increase voltage output of Power Supply from 0
volts until 214A gates on. Gating voltage should be
8 volts or less.
5-6. EXTERNAL TRIGGERING.
Connect output of Audio Oscillator to Model 2 14A
a.
TRIGGER INPUT.
b. Connect Model 214A PULSE OUTPUT to Oscillo-
scope Plug-In Channel A INPUT.
c. Set Model 214A:
PULSE AMPLITUDE. . . . . . .
10 VOLTS
Amplitude VERNIER . . . . . . . . . . . . cw
TRIGGER MODE . . . . . . . . . . . . . EXT
PULSE WIDTH . . . .
.05-l
WidthVERNIER . . . . . ...:::... 3
d. Set Oscilloscope and Plug-In:
Channel A SENSITIVITY 2v/cm with 50 ohm-
load or 5v/cm without 50 ohmload
SWEEP TIME . . . . . . . . . . 0.1 psec/cm
TRIG SOURCE . . . . . . . . . . . . . . INT
e. Set Oscillator frequency to 200 kc andOscillator
amplitude for l/2 volt peak-to-peak.
f. Model 214A shouldtrigger on both + and - slope
by adjusting EXT TRIG LEVEL.
5-7. PULSE AMPLITUDE AND WIDTH.
a. Connect aBNC Tee to High Frequency Oscillo-
scope Plug-In Channel A INPUT. A 50-ohm, 1%
resistor witharating of at least 10 watts (such as the
hp 50-ohm load recommended in Table 5-1, Item 10)
should be connected as a load to the Tee. Connect the
Tee to the Model 214A PULSE OUTPUT with a BNC
to BNC cable.
b. Connect Oscilloscope TRIGGERINPUT toMode
214A TRIGGER OUTPUT with BNC to BNC cable.
c. Set Model 214A:
INT REP RATE. . . . . . . . . . .
. Ol-. 1
Int. Rep. Rate VERNIER. . . . . . Midrange
PULSE POSITION . . . . . . . . . . . l-10
Position VERNIER . . . . . . . . . . . . . 1
PULSE WIDTH . . . . . . . . . . . lK- 10K
Width VERNIER. . . . . . . . . . . fully ccw
PULSE AMPLITUDE . . . . . .
100 VOLTS
Amplitude VERNIER . . . . . . . . . fully cw
TRIG MODE. . . . . . . . . . . . . . . . INT
d. Set Oscilloscope and Plug-In:
Channel Selector . . . . . . . . CHANNEL A
Channel A SENSITIVITY . . . . .
SWEEP TIME . . . . . . .
20 V/CM
0.1 MSEC/CM
Int SWEEP MAGNIFIER . . . . . . . . . . Xl
TRIG SOURCE . . . . . . . . . . . . . . EXT
e. There should be at least 100 volts (5 cm) of
vertical display.
f. Set Model 214A PULSE WIDTH to .05-l.
PULSE POSITION . . . . . . . . . . . . O-l
Pulse Position VERNIER . . . . . . . . CCW
g. Set Oscilloscope:
SWEEP TIME. . . . . . . . . 0.1 /JSEC/CM
Int SWEEP MAGNIFIER . . . . , . . . . X10
h. There should be at least 50 nanoseconds (5 cm)
of horizontal display measured at half amplitude of
pulse.
i. Set Model 214A:
PULSE AMPLITUDE , . . . . . 0.2 VOLTS
PULSE WIDTH . . . . . . . . . . .
lK- 10K
Width VERNIER . . . . . . . . . . . fully cw
Rep Rate VERN . . . . . . . . . . . fully ccw
j. Set Oscilloscope and Plug-In:
Channel A SENSITIVITY . . . . . 05 V/CM
SWEEP TIME. . . . . . . . .
2 I&EC/CM
Int SWEEP MAGNIFIER . . . . . . . . . . Xl
k. There should be at least lOmilliseconds (5 cm)
of horizontal display.
m. Set Model 214A Amplitude VERNIER fully ccw.
02056-3
5-l
Section V
Paragraph 5-8
Model 214A
Table 5-l. Equipment Required for Tests and Adjustments
Item
Equipment Name or Part Req’d Required Ref. Para.
1 Power Supply
Model
‘@ 723A
No.
1 Performance 5-5
Check
Audio Oscillator c@ 200CD 1 Performance 5-6 0.5 volt peak-to-peak,
Check 200 kc
Variable Attenuator @ 355D
1 Performance 5-12 thru 5-14 50-ohms,
Check
Sampling Oscillo- @ 185B
scope and Plug-in
‘@ 187B
5 50 -ohm Load ~$3 908A 1
1 Performance 5-13 thru 5-16 800 MC Bandwidth, dual
1. Check
Performance 5-13, 5-14 Type N connector, 50
Check & Adj ohms, SWR<l. 05, l/2 W
6 50-ohm Tee @ 10204B
1
Performance 5-13 thru 5-16 Type N 50 ohm Tee for
Check
7 BNC to Type N @10122A 1 Performance
Cable
Check male, 50 ohms * l/2 ohm
8 BNC to Dual Banana @llOOlA 1 Performance 5-6
Cable
Check 50 ohm cable
Required
Characteristics
At least 8V output
120 db attenuation
channel, Sensitivity
5 mv/cm
Sampling Oscilloscope
Probe
5-13 thru 5-16 Type N male to BNC fe-
BNC male to dual banana
9 BNC Female to Type N@ 1250- 1 Performance 5-15 BNC female to Type N
a. Connect a BNC Tee to Oscilloscope Pl<g-in
Channel A INPUT. Connect 50-ohm load (10 W) to
Tee. Connect the Tee to the Model 2 144 PULSE OUTPUT with a BNC to BNC cable.
b. Connect Oscilloscope TRIGGER INPUT to the
Model 214A TRIGGER OUTPUT with BNC to BNC
CABLE.
C.
Set Model 214A.
TRIGGER OUTPUT
TRIGGER MODE
PULSE WIDTH.
..................
.................
INT.
................ 10-100
Width VERNIER. .............. fully ccw
INT. REP. RATE
Rate VERNIER
............... 1 - 10
...............
fully ccw
PULSE OUTPUT ...................
PULSE AMPLITUDE
Amplitude VERNIER,
PULSE POSITION
Position VERNIER
d.
Set Oscilloscope and Plug-in:
Channel Selector
Channel A SENSITIVITY
Channel A INPUT.
TRIGGER SLOPE.
TRIGGER SOURCE.
SWEEP TIME
.............
Int SWEEP MAGNIFIER
Adjust Position VERNIER until leading edge of
e.
pulse lines up with first vertical line of Oscil-
first
.......... 10 VOLTS
...........
fully cw
............. 10 - 100
.............
fully ccw
........... CHANNEL A
..........
.................
2V/CM
DC
..................
...............
EXT.
16 @KC/CM
............. Xl
loscope graticule.
5-3
3
+
-
+
Section V
Paragraphs 5-12 to 5-14
Model 214A
f. Adjust Int. Rep. Rate VERNIER until leading
edge of second pulse lines up with last vertical line
of Oscilloscope graticule.
g. Adjust width VERNIER; no overload should
occur until pulse width is at least 50 psec (5 cm).
h. Set:
Model 214A Width VERNIER . . . . . . fully ccw
Model 214A PULSE AMPLITUDE . . 20 VOLTS
Oscilloscope Channel A SENSITIVITY
. . . . . . . ..**............
5 V/CM
i. Adjust width VERNIER; no overload should
occur until pulse width is at least 25 psec (2.5 cm).
j. Set:
Model 214A Width VERNIER. . . . . , , fully ccw
Model 214A PULSE AMPLITUDE . . 50 VOLTS
Oscilloscope Channel A SENSITIVITY
f. Looking at leading edge of pulse, jitter shouldbe
less than 1.5 nsec (1.5 cm).
5-17. ADJUSTMENTS.
5-18. Paragraphs 5-22 through 5-27 give a complete
I.
adjustment procedure for the Model 214A. Since some
adjustments interact with others, follow the procedures in the step sequence given. If difficulty is
encountered in making any adjustment, refer to Paragraph 5-28 for troubleshooting procedures.
5-19. EQUIPMENT REQUIRED. Test equipment recommended for the adjustment procedure is listed in
Table 5-1, items 11 through 15. Similar instruments
having the listed characteristics may be substituted.
.5pSEC/CM
O-1
cw
10
5-20. LOCATION OF ADJUSTMENTS.
shows the location of all internal adjustments in the
Model 214A.
5-21. POWER SUPPLY ADJUSTMENTS.
5-22. Measure and adjust each supply with dc voltmeter in the order given in Table 5-2, using wire
colors to locate each voltage test point and reference
point. The -350 volt and -505 volt supplies are not
regulated and may vary as much as &100/o at normal
line voltage.
c. Attach oscilloscope probe to pin 1 of V102 (tube
side of R126, 860 0 ) of the Model 214A. The waveform amplitude should be about 30 volts (3 cm). If
no waveform appears, turn symmetry adjustment
R133 fully ccw.
d. Set INT. REP. RATE VERNIER to obtain one
complete cycle in 10 cm on scope.
e. Adjust Symmetry Adj R133 to obtain a symmetrical waveshape. Turn VERNIER to retain one
cycle in 10 cm while setting symmetry with R133.
f. Set Model 214A INT, REP. RATE to lOO-1K
and Rate VERNIER fully ccw.
g. Set scope SWEEP TIME to 2 nSEC/CM.
Figure 5-5
O-1
1 VOLT/CM
20 @EC/CM
Table 5-2. Power Supply Voltage Adjustments
SUPPlY
Voltage Wire Color
-150
+ 150 red
Voltage Test Point Reference Point Adjustment
Wire Color
vi0 blk (chassis) R26
blk (chassis) R13
-200 wht-yel-vio wht-blk-blu (Ov) R45
-350
-505 wht -blk-vio
wht -vio wht-blk-blu (Ov) None
wht-blk-blu (Ov)
None
I
5-6 02056-4
Model 214A
SCREEN
MAX DELAY
ADJ R250 ADJ ADJ
SHUNT
CURRENT OVERSHOOT
R363
c319
Section V
Paragraph 5 -24
BIAS CURRENT
ADJ R344
05-l
MIN DELAY
ADJ R260
.05-l
MAX DELAY
ADJ C229
MIN DELAY
ADJ R259
O-l
MAX DELAY
ADJ C205
O-l
MIN DELAY
ADJ R210
---- .__
MAX DELAY HIGH FREQ SYMMETRY
ADJ R20l ADJ RI35 ADJ RI33
Figure 5-5. Location of Adjustments
h. Connect scope probe to pin 8 of V103 (tube side VERNIER fully ccw.
of R144. 150 R ).
greater than 100 psec (5 cm).
i. Adjust Max Rep Rate Cl13 to set spacing between pulses of about 11 psec (5.5 cm).
amplitude should be about 35 volts.
j. Set scope SWEEP TIME to 1 PSEC. CM. Rotate
Model 214A INT. REP. RATE VERNIER fully cw.
k. Adjust High Freq. Adj. R135 to obtain 11 periods/
n. To check above adjustment, set scope sweep
time to 2 jlSEC/CM, Model 214A INT. REP. RATE
to lo-100 and VERNIER fully cw. Pulse spacing
should be less than 10 jlsec (5 cm). Next set scope
sweep time to 20 pSEC/CM and Model 214A rate
side of R144, 150 n ) and probe cable to scope TRIG
INPUT.
f. Check to see that when PULSE POSITION VER-
NIER is fully clockwise, arrow on knob points to
the black dot on the front panel. If not, loosen set
screws,
slip knob to proper position, and tighten
screws.
g. Set PULSE POSITION VERNIER to 10.
h. Adjust Max Delay Adj R201 to obtain 100 psec
(5 cm) spacing between the channel A and channel B
displayed pulses.
i. Set PULSE POSITION VERNIER to 1. Change
scope sweep time to 1 pSEC/CM.
j, Adjust Min Delay Adj R209 to obtain 10 psec
(10 cm) spacing between channel A and channel B
pulses.
k. Repeat above procedure starting with step g
to minimize interaction between R201 and R209.
q. Adjust O-l Max Delay Adj C205 to obtain 1 ysec
(5 cm) spacing between channel A and channel B
pulses.
r. Change scope sweep time to .l pSEC/CM;
Model 214A Position VERNIER to 1.
s. Adjust O-l Min Delay Adj R210 to obtain .l ~sec
(1 cm) spacing between channel A and channel B
pulses.
t. Repeat above procedure starting with step n
to minimize interaction between C205 and R210.
Note that with the semi-calibrated VERNIER, resetting to exactly 1 or 10 is difficult and this error may
seem like interaction between the two adjustments.
5-25. OUTPUT BIAS CURRENT.
a. Set Model 214A TRIGGER MODE switch to
EXT. (or set GATE INPUT to GATED position).
This is to ensure that no signal can trigger output
tubes V304 and V305 during this adjustment pro-
cedure.
CAUTION
If step a is not followed, damage to Model
214A circuit components may result.
b. Refer to Figure 5-6 and locate the wire loop
on the bottom side of the output circuit board, A301.
The current flowing in this loop is to be measured
and an adjustment made if necessary.
c. If using a @ Model 428B, clip the current probe
around the wire loop,
with arrow on the probe
pointing to the nearest side panel. If a conventional
milliammeter is used, the wire loop must be opened
and the milliammeter inserted in series.
To open
the loop, either unsolder one end of the wire from
the circuit board, or slide the insulation to one end
and clip the wire.
d, AdjustR344foranindicationof from49to45 ma.
Note
It may appear that interaction is occurring
because the VERNIER has not been reset
to the same point as before. Since VERNIER is semi-calibrated by front panel
markings, consider errors in resetting to
“1” or
“10” for above adjustment check.
m. Set VERNIER to ccw extreme and pulse spacing
should be less than 5 psec; at cw extreme greater
than 110 psec.
PULSE OUTPUT. Connect the other end of the cable
to a BNC, T-connector at the scope channel A input.
Attach a 50 ohm termination (procedure assumes use
of a termination capable of dissipating at least l/2
watt) to the T-connector. Use a coaxial cable and connect the Model 214A TRIGGER OUTPUT to the scope
TRIG. INPUT.
d. Check to see that the arrow on the PULSE
WIDTH VERNIER points to the black dot on the front
panel when fully cw. If not, loosen set screws, slip
knob to proper position, and tighten screws.
e. Set PULSE WIDTH VERNIER to 10.
f. Adjust Max Delay Adj R250 to obtain a pulse
width of 1OOusec (5 cm) observed on the scope.
g. Change scope sweep time to 2 wSEC/CM. Set
214A PULSE WIDTH VERNIER to 1.
h. Adjust Min Delay Adj R259 to obtain a pulse
width of lOu.sec (5 cm) observed on the scope.
i. Repeat above procedure starting with step e
to minimize the interaction between R250 and R259.
In checking for interaction, consider the error involved in resetting to the same 1 or 10 VERNIER
position used before.
j. Set Model 214A PULSE WIDTH to 10, width
VERNIER to 9, PULSE AMPLITUDE to 10,amplitude
VERNIER to fully cw. Change scope SENSITIVITY
to 2 VOLTS/CM.
k. Adjust 1OV amplitude R355 to obtain a 11 V
(5.5 cm)pulse observed on the scope (be sure PULSE
AMPLITUDE VERNIER is fully cw).
m. Change Model 214A TRIGGER MODE to EXT.,
and PULSE AMPLITUDE to 50.
n. Connect a dc voltmeter across resistor R352;
negative lead at tube side of R352. 1200 ohms. aositive lead clipped to the upright metal shield for-tubes
V304 and V305.
p. Set R353, 50 V Amplitude, to mid-position and
adjust Screen Shunt Current Adj R363 until voltmeter
indicates 12 volts.
Disconnect voltmeter.
q. Set Model 214A TRIGGER MODE to INT. and
PULSE AMPLITUDE to 20. Change scope SENSI TIVITY to 5 VOLTS/CM.
r. Adjust 20 V Amplitude R354 to obtain a 21 V
(4.2 cm)pulse observed on the scope.
With VERNIER
ccw pulse amplitude should decrease to about 10 V.
s.
Set Model 214A controls as follows:
PULSE OUTPUT . . . . . . . . . . . . . . . _
PULSE AMPLITUDE* * * * 20, VERNIER cw
t.
Set Oscilloscope controls as follows:
SENSITIVITY. . . . . . , . . . 5 VOLTS/CM
VERNIER. . . . . . . . . . . . . . . . . (-‘AL
U.
Adjust Model 214A PULSE AMPLITUDE VER-
NIER for 4 cm display (20 V). Observe overshoot
.~
at end of trailing edge of pulse.
v. Adjust C319 for 4-4.5 mm (4-4-1/2%)overshoot.
Note
C319 should not be adjusted for less than
40/o overshoot as over-compensation may
result in rise time deterioration.
w. Set Model 214A PULSE AMPLITUDE to 50 and
VERNIER fully cw. Change scope SENSITIVITY to
10 VOLTS/CM.
x. Adjust 50 V Amplitude R353 to obtain a 52 V
(5.2 cm)pulse observed on the scope.
Turning VERNIER ccw should aecrease pulse amplitude to about
20 volts.
y, Set Model 214A PULSE WIDTH to .05-l, Width
VERNIER to 10, Rate VERNIER fully clockwise
and PULSE AMPLITUDE VERNIER for 50V amplitude.
Set scope sweep time to .21-~ SEC/CM.
z. Adjust .05-l Max Delay Adj C229 to obtain
width of 1 ysec (5 cm) observed on the scope.
aa. Set Model 214A PULSE WIDTH VERNIER to
1. Change scope SWEEP TIME to . 1 (rSEC/CM,
HORIZONTAL DISPLAY to X10, and adjust HORIZONTAL POSITION to center trace.
bb. Adjust .05-l Min Delay Adj R260 to obtain a
pulse width of 1OOnsec (10 cm) observed on the scope.
Width of pulse is measured at half amplitude point.
Set scope HORIZONTAL DISPLAY back to Xl.
cc. Repeat above procedure starting with step y to
minimize interaction between C229 and R260.
In
checking for interaction consider the error involved
in resetting VERNIER to same 10 position.
dd. Set the ADVANCE/DELAY /DOUBLE switch to
PULSE DELAY.
ee. Set the oscilloscope SWEEP TIME for 10
nsec/cm.
ff. Set the PULSE WIDTH VERNIERfor a 50 nsec
pulse width.
gg. Set the ADVANCE/DELAY/DOUBLE switch to
PULSE ADVANCE.
hh. The width of the displayed pulse is 50*5 nsec
at the 50% amplitude point.
ii. If necessary, select a new value for resistor
R143 so that the pulse advance mode meets specification. The selection of R143 should be between 200
and 430 ohms.
c. Attach a 50-ohm coaxial cable to the Model 214A
PULSE OUTPUT. Connect the other end of the cable
directly to the scope channel A input through a 50-ohm
load. Connect a coaxial cable between the Model 214A
TRIGGER OUTPUT and the scope TRIG. INPUT,
d. Adjust Model 214A PULSE POSITION VERNIER
and scope HORIZONTAL POSITION control until the
leading edge of the pulse is at the left edge of the
scope graticule.
e. Adjust Model 214A INT. REP. RATE VERNIER
until the leading edge of the second pulse is at the
right edge of the scope graticule.
f. Adjust Model 214A PULSE WIDTH VERNIER to
obtain a pulse 55 ;Isec (5.5 cm) wide observed on the
scope.
This corresponds to a duty cycle of about 55%.
g. If overload relay Kl is clicking (front panel
OVERLOAD light should also operate), rotate Over-
load Adj R30 clockwise until it stops.
Then rotate R30
counterclockwise until relay Kl just begins operation.
h. Rotate PULSE WIDTH VERNIER ccw to stop
overload relay operation.
Relay should operate again
as pulse width reaches about 55tisec (5. 5 cm).
5-28. TROUBLESHOOTING.
5-29. The information suggested in Paragraphs 5-30
through 5-34 is provided as a front panelcheck toaid
in locating-possible faulty components in the shortest
possible time.
In each solution it is assumed that
active components such as tubes, transistors and
diodes are defective, which may not be true in every
case. Waveforms, dc voltages and ohmmeter checks
in that order can be used to locate faulty passive com-
ponents such as resistors and capacitors. 111 locating
any problemin the Model 214A, check power supply
voltages first since they affect several circuits.
5-30. TRIGGER MODE CHECKS.
a. If the Model 214Acan be triggeredwith TRIGGER
MODE set to INT. but not in EXT. or MANUAL posi-
tions, replace DSlOl.
b. If the Model 214A can be triggered with TRIGGER
MODE setto INT. or MANUAL but not in EXT. posi-
tions, replace V101.
c. If the Model 214Acan be triggered with TRIGGER
MODE set to EXT. or MANUAL but not in INT. posi-
tions, replace CRlOl.
d. If the Model 214A can not be triggered in any of
the TRIGGER MODE positions, check waveforms 1
through 4 in that order to locate faulty component.
e. If the Model 214A will not gate on a minimum of
8 volts, check V103.
f. If V103, pin 8, has no output,check the -7.8 v
bias on V103 pins 2 and 7, and check the cathode potential on CR103 (should
be
positive).
5-31. PULSE CONTROL CHECKS.
a. If a trigger can be obtained at the TRIGGER OUTPUT when PUIS E ADVANCE/PULSE DELAY/DOUBLE
PULSE control is set to PULSE ADVANCE or DOUBLE
PULSE, but not when set to PULSE DELAY, replace
v202.
b. If a trigger can not be obtained with PULSE,
ADVANCE/PULSE DELAY/DOUBLE PULSE control
in any position, replace V203 or check waveforms 10
through 12.
c. If PULSE POSITION control does not reposition
pulse, check waveforms 4 through 8 to locate faulty
component.
d. If PULSE WIDTH control does not vary pulse
width, check waveforms 17 through 22 to locate faulty
component.
e. If pulse width or pulse position suddenly changes
greatly when the VERNIERS are varied, replace diodes
CR202/203 or CR212/213, depending on which circuit
is faulty.
f. If there are no start or stop spikes (plates of
V301 and V302) check diodes in grid circuits (CR301,
302, 303, and CR306, 307, 308 and 309).
5-32. OUTPUT CIRCUIT CHECKS.
a. If a pulse is present at TRIGGER OUTPUT but
not at PULSE OUTPUT, check waveforms 13 through
16 and 23 through 26 in the Start-Stop Pulse circuits,
and dc voltages in the output circuit to locate faulty
components.
b. If output pulse amplitude will increase but does
not decrease, replace V308.
c. If output pulse will not hold its amplitude (sags),
check for blown fuse F2, or C325 for leakage.
d. If the output pulse appears as two spikes (start
and stop spikes), check Q301, CR326, CR327, and
CR328.
5-10
02506-4
Model 214A
Paragraph 5-33 to 5-44
Section V
e. Poor rise time is usually caused by weak V301
or faulty diodes CR324 and CR325.
f. If Amplitudepots, R353, R354, or R355 willnot
adjust the 10 v, 20 v, or 50 v ranges, respectively, to
the required amplitude, first check diodes CR320 thru
CR322. Thencheckbias adjustments R344 (par. 5-25)
and R363 (par. 5-26, steps m through p) for proper
bias on output tubes, V304 and V305.
g. If excessive overshoot exists on high amplitude
ranges, replace CR324 or CR325.
5-33. POWER SUPPLY CHECKS.
5-34. The power supplies can be checked for malfunc-
tions by making dc voltage measurements. If front
panel control settings are made, as indicated in
Schematic Notes, before measurements are made,
f’O” reference and chassis ground will be the same.
5-35. REPAIR AND REPLACEMENT.
S-36. GENERAL.
5-37. Refer to Figures 5-6 through 5-11 for locations
and identification of components on etched circuit
boards in the Model 214A.
For components not identified in these figures, determine the circuit location
intheinstrument and refer to the schematic diagrams
for reference designator.
Section VI contains a com-
plete list of reference designators for electrical com-
ponents and the Hewlett-Packard Company stock
number for the item.
5-38. SERVICING ETCHED CIRCUIT BOARDS.
5-39. Etched circuit boards used in the Model 214A
have components onone side of the board with aplated
conductive layer of metal through component holes.
@ Service Note M-20D also contains useful information
on etched circuit repair.
The important steps and
considerations are:
a. Usea lowheat (30 to47.5 watts, less than800”F
idling temperature), slightly bent chisel tip (l/16 to
l/8 inch diameter) soldering iron, and a small diameter, high tin content solder.
If a rosin solder is used,
clean the area thoroughly after soldering.
b. Components may be removed by placing the
soldering ironon the component lead on either side of
the board andpullingup onthe !ead. If heat is applied
to the component side of the board, greater care is
required to avoid damage to the component (especially
true for diodes).
If heat damage may occur, grip the
lead with a pair of pliers toprovide a heat sink between
the soldering iron and component.
c. If a component is obviously damaged or faulty,
clip the leads close to the component and then unsolder
Ihe leads from the board.
d. Large components such as potentiometers and
tube sockets may be removed by rotating the soldering
iron from lead to leadand applying steady pressure to
lift the part free (the alternative is to clip the leads of
a damaged part).
e. Since the conductor part of the etched circuit
boards is a metal plated surface, covered with solder,
use care lo avoid overheating and lifting the conductor
from the board. A conductor may be cemented back
in place with a quick-drying acetate base cement (use
sparingly) having good insulating properties. Another
method for repair is to solder a section of good conducting wire along the damaged area.
f. Clear the solder from the circuit board hole
before inserting a new component lead. Heat the
solder in the hole, remove the iron, and quickly insert
a pointed non-metallic object, such as a toothpick.
g. Shape the new component leads and clip to
proper length. Insert the leads in the holes andapply
heat and solder, preferably on the conductor side.
S-40. PERIODIC MAINTENANCE.
5-41. GENERAL.
5-42. The air intake fan motor needs little lubrication
or preventive maintenance.
About once a year, place
one or two drops of light oil on the shaft at the front
and rear bearing supports.
It is also recommended
as preventive maintenance that the interior of the instrument be cleared of any accumulated dust when
necessary.
y -\
/
iV306’
/
‘\./’
A301
OUTPUT ASSY
CIRCUIT SIDE
STOCK NO. 00214 -66503
Figure 5-6. Assembly A301 Circuit Side
02506-4
2141-b.-!
5-43. CLEANING AIR FILTER.
5-44. Inspect the air filter (rear of instrument) regu-
larly and clean it before dust can restrict air flow.
Air flows from outside the instrument in through the
filter.
a. Remove the filter and wash it inwarm water and
detergent.
b. Dry the filter thoroughly and coat with filter
adhesive preparation recommended in Paragraph
2-10.
5-11
Section V
Figure 5-7
Model 214A
5-12
i?
-- OCD
Ok-- I
Figure 5-7. Assembly Al01 Component Location
Rl59 -.-..
-,., - -_
--
I
-R2l!j -m +R265 a..-.- ----
--.
02056-3
_.._ _ _.-- ..---_. --
Model 214A
Section V
Figure 5-8
02056-l
,
II
Cl04
RI26
LlOl
Cl10 Cl10
RI32 RI32
LlO2 LlO2
RI33 I RI33
RI35
Cl08
RI28
2
d
CIC
I
R 127
Figure 5-8. Assembly Al02 Component Location
I
II
5-13
Section V
Figure 9
Model 214A
5-14
-
I
B
R210 R209
-.
-Ii LR260 R25g
Figure 5-9. Assemblies A202 and A204 Component Location
214A-A-7
?-
02056-l
Model 214A
Section V
Figure 5-10
02056-3
2 I4A-A-106
ON OTHER
SIDE
Figure 5-10. Assembly A301 Component Location
5-15
Section V
Figure 5-11
Model
214A
rm
I
Kl
i
a
R6
I
32
\
,
RI3
Cl0
\
I
RI4
:
V6 a
CR6
- CR5-
0
20
RII
I
I
i
. .
I
I I
cu
lo
a
CII
CR7
c9
R31
214A-A-6A 1
5-16
Figure 5-11. Assembly Al Component Location
02056- 2
Model 214A
+150v
--
v
v
v
v
i-J
i
J-II!
.I MSECKM
.I USEWCM
r-
-l
V
.IUSEC/CM
I-
.I USEWCM
- +15ov
- +125V
- +Iv
- -7.av
- +1e5v
- +15ov
- +9ov
- +3ov
- ov
v J(
.I USECICM
yy f-- - +150v
v
.I USEC/CM
.I USEWCM
I.+-
.I USEC/CM
1 I:‘,,
- +75v
- +lBv
- ov
- +12v
- -7.6V
v fuL -
.I MSECKM
- +66v
v
- +1oov
- +45v
- -7.8V
- -50v
+35v
v
77
.I USECKM
.I USEC/CM
n -
JL-0,
.I USEC/CM
Section V
Figure 5-12
v ~-/J--l/- - +150v
.I MSECKM
v HH.h - +Iav
.I MSEC/CM
v Au - +150v
.I MSECKM
II
v J/- -
.I USECKM
J --ov
.IUSEC/CM
Figure 5-12. Typical Waveforms (see Schematic and Schematic Notes)
- +57v
- +3v
- +5ov
- +42V
-7.ev
- -45v
1 fzn_ - +15ov
.I USECKM
L
.I USEC/CM
L
.I USEC/CM
.I MSECKM
- +1oov
- +45v
- -7.6V
- +35v
- ov
v
w
v
v
- +5v
A-
.I USECKM
- -25V
7-y::
.I USECKM.
- ov
.5 USEWCM
lJ--
.I USECKM
50 USECICM
- -25V
- +15ov
- +105v
02056-I
5-17
Section V
SCHEMATIC DIAGRAM NOTES
1. Except as indicated: capacitance in microfarads; inductance in microhenries; resistance
in ohms.
Touching test probe at this point causes transient pulse and OVERLOAD indication. To
2.
avoid: turn power off, attach test probe, turn power on, and take measurement.
DC Voltage Measurement Conditions:
3.
a.
Set SLOPE, TRIGGER OUTPUT, and PULSE OUTPUT to -.
b. Set GATE INPUT switch to NORM.
c. Set PULSE ADVANCE/PULSE DELAY/DOUBLE PULSE to PULSE ADVANCE.
d. Set TRIGGER MODE to EXT.
e. Set all remaining switches, controls, and VERNIERS to 12 o’clock position (i. e. indi-
cator on knob points toward top of front panel).
f. Voltages shown are typical values, may vary f 10% from that shown. Voltages should
be measured with a high impedance dc voltmeter.
Model 214A
4. Waveform Measurement Conditions:
a. Set SLOPE, TRIGGER OUTPUT, and PULSE OUTPUT to -.
Set GATE INPUT switch to NORM.
b.
c. Set PULSE ADVANCE/PULSE DELAY/DOUBLE PULSE to PULSE ADVANCE.
d. Set TRIGGER MODE to INT.
e. Set all remaining switches, controls, and VERNIERS to 12 o’clock positions (i.e. indi-
cator on knob points toward top of front panel).
Waveforms shown are typical and were measured using a 1O:l divider probe and the
f.
oscilloscope with plug-in units indicated in Table 5-2.
Test points are indicated by
number in triangle and keyed to Figure 5-12.
Schematics are drawn showing switches in following positions:
7. Switch sections are identified by letters following the schematic designator (e.g. S4OlC).
Letters refer to a specific switch wafer, where A = front side of wafer nearest front panel,
B = rear side of wafer nearest panel, C = front side of second wafer, etc.
COPYR,GHT ,963 BY HEWLETT-PACKARD CO.
Z,4&-o”TP”T LYP.B M” -704
c3oe
c30;
R304
R324
R339
Model 214A
-01
1 \
Y
25n
1
r---------------------------
\
\
\
\
T-----------
50n ,
ON TWC
/
L401
2.5MH
\
\
\
\
\
\
\
\
\
02056-2
Section V
Figure 5- 17
ZOAXIAL
) TOROIDS
A
\
\
-----------1
---7---------r---~---
\
\
\
\
\
\
\
\
\
\
\
-T-----T---
_1( “+ - - + 2,: - - - -2
0 0
0 0
* 0
9%
p;10’ ’
R413
150
_I
WHT-BLK-RED
a353
250K
REFERENCE DESIGNATORS
rTi$z-j
L308,401.402
R35l-355,357,358.360-
364.366-369.401.402.
404-408,41 I-419
5401,402
V307,308
DELETED:
COPYRIGHT 1963 BY HEWLETT-PACKARD CO.
2141-OUTPUT- 550
Figure 5- 17. Output Circuit
5- 23/5- 24
Model 214A
Paragraphs 6-1 to 6-6
Section VI
SECTION VI
REPLACEABLE PARTS
6-1. INTRODUCTION.
6-2. This section contains information for ordering
replacement parts.
Table 6-1 lists parts in alphanumerical order of their reference designations and
indicates the description and s@$ stock number of each
part, together with any applicable notes. Table 6-2
lists parts in alpha-numerical order of their @ stock
number and provides the following information on
each part:
a. Description of the part (see list of abbreviations
below),
b. Typical manufacturer of the part in a five-digit
code; see list of manufacturers in Table 6-3.
c. Manufacturer’s part number.
d. Total quantity used in the instrument (TQ column),
REFERENCE DESIGNATORS
A = assembly
B = motor
= capacitor
C
CP = couoli”E
CR
= diode _
DL
= delay line
DS
= device signaling (lamp)
A = amperes
= automatic frequency control
A.F.C
AMPL = amplifier
B. F. 0. = beat frequency oscillator
BE CU = bervllium couoer
BH = binier head ..
BP = bandpass
= mix electronic part Ml? = mechanical part
= fuse P = plug
F
FL
= filter
J
= jack R = resistor
K
= relay RT = thermistor
= inductor S
L
M
= meter T
ABBREVIATIONS
GE
= germanium
GL
= glass
GRD
= ground(ed)
H
= henries
HEX
= hexagonal
= mercury
HG
HR
= hour(s)
IF
= intermediate freq
IMPG
= impregnated
INCD
= incandescent
= include(s)
EiCL
INS
= insulation(ed)
INT
= internal
K
= kilo = 1000
LIN = linear taper
LK WASH = lock washer
LOG = logarithmic taper
= low pass filter
LPF
M = milli = 10s3
MEG = “leg = IO-6
METFLM = metal film
MFR = manufacturer
MINAT = miniature
MOM = momentary
MTG = mounting
MY = “mylar‘
N = “ano (10-9)
6-3. Miscellaneous parts are listed at the end of
Table 6-1.
6-4. ORDERING INFORMATION.
6-5. To obtain replacement parts, address order or
inquiry to your local Hewlett-Packard Field Office
(see maps at rear of this manual for addresses).
Identify parts by their Hewlett- Packard stock numbers.
6-6. To obtain a part that is not listed, include:
a. Instrument model number.
b. Instrument serial number.
c. Description of the part.
d. Function and location of the part.
= terminal board
TB
Q
N/C =
NE =
NI PL =
N/O =
NPO =
NRFR =
NSR =
OBD =
OH =
ox =
P =
PC =
PF =
PH BRZ =
PHL =
PIV =
P/O =
POLY =
PORC =
POS =
POT =
PP =
PT =
RECT =
RF =
RH =
= transistor
= switch
= transformer
normally closed
neon
nickel plate
normally open
negative positive zero
(zero temperature
coefficient)
not recommended for
field replacement
not separately
replaceable
order by description
oval head
oxide
peak
printed circuit
picafarads =
lo-l2 farads
phosphor bronze
Phillips
peak inverse voltage
part of
polystyrene
porcelain
position(s)
potentiometer
peak-to-peak
point
rectifier
radio frequency
round head
TP = test point
V = vacuum tube, neon
W = cable
X
Y
RMO = rack mount only
RMS = root-mean-square
S-B = slow -blow
SCR = screw
SE
SECT = section(s)
SEMICON = semiconductor
SI = silicon
SIL = silver
SL = slide
SPL = special
SST = stainless steel
SR = split ring
STL = stec1
* See list of abbreviations in introduction to this section
6-21
ss;btix-6 v;
Model 214A
Table 6-3. Code List of Manufacturers.
The followmg code numbers are from the Federal Supply Code for Manufacturers Cataloging Handbooks H4-1
(Name to Code) and H4-‘2 (Code to Name) and their latest supplements.
supplements used appear at the bottom of each page.
suppliers not appearing in the H4 Handbooks.
Code
Manufacturer
NO.
tlOOO0 U.S.A. Common
00136 McCoy Electronics
00144 ADC Products Inc
S”bsldlary of Magnetic Controls co
,age tleCtlOnlC* L‘orp.
uuzij
Cemco Inc
00281
Humrdlal CoIlon, CalIf.
00334
Mlcroflo” co., 1°C. Valley Stream, N.Y.
00348
00373
Gallock Inc.,
Electronrcs Products DIV.
10656
Aerovox Corp. New Bedford, Mass.
Amp. Inc. Harrrsburg. Pa.
10779
A~rcrsft Radro Corn Boonto”, N. J.
00781
Northern Englneerrng Laboratories, 1°C.
00815
Sangamo Eleclrrc Co., Prckens Div.
00853
Gee Engrneerrng Co. Las Angeles, Calrf.
00866
Carl E. Holmes Corp. Los Angeles, Calrf.
0089 1
009 29
Mrcrolab Inc. Lrvrngston, N. J.
01002 General Electrrc Co
0 1009
Alden Products Co. Brockto”. Mass.
Allen Bradlev Co.
01121
Lrtto” Industrres, Inc.
01255
TRW Semrconductors, Inc.
01281
Texas Instruments. Inc.,
01295
01349
01589
Amerock Cord.
01930
Pulse Eoglneerlng co.
01961
Ferroxcube Corp. of America
02114
Cole Rubber and Plastrcs Inc.
02286
Amphenol.Borg Electronrcs Corp.
02660
02735
02171
02771
03508
03705
03797
03877
03888
03954
04009
04013
raurus Corp. Lambertville, N. J.
04222
04354
04404
Hopkins Englneerrng Co.
G. E. Semrconductor Prod. Dept. Syracuse, N.Y.
Aoex Machrne 8 Tool Co.
Eidema Corp. Compion, ‘Calif.
TransItron Eleclrrc Corp.
Pyrolllm Resrstor Co., Inc.
Smger Co., Orehl DIV.
Frnderne Plan1
Arrow, Hart and Hegeman Elecl. Co.
HI-Q Division of Aerovox
Precirron Paper Tube Ca.
Oymec Drvrsron of Hewlett-Packard Co.
Sylvanra Electrrc Products, Mrcrowave
clev1ce DIV.
Motorola, Inc., Semrconductor Prod DIV.
Automatrc Electrrc Co. Northlake, Ill,
Sequora Wrre co Redwood City, Calrf.
Pleclslan COll sprrng co.
P.M. Motor Company
Twenlreth Century Plastics, Inc.
Weslrnghouse Electric Corp.
Semr-Conductor Depl.
Ullronlx, ,nc
Linde D~vrsron
(c/Q Eleclr~cal Spec Co. l Cleveland, Ohio
Any sqpl~er of U.S.
MQU”l Holly springs, Pa.
Mlnneapolls. Mlnn
Beverly tlrlls, ‘Calrf.
Old Saybrook, Co”“.
San Fernando, Calil.
Mountarn View, CalIf.
Los Angeles, Calif.
Kenlet Dept
Address
Hochester, N. T.
DanIelson. corm.
Camden, N. J.
Burlington, WlS.
PIckens. S.C.
Garnswlle, Fla
Mrlwaukee. Wis.
Lawndale. Calrf.
Alliance, Ohro
Van NUVS CalIf.
Rocirfdrd, Ill,
Santa Clara. Calrf.
Saugerhes, N. Y.
Sunnyvale. Calif.
Chrcaga. III.
Davton. Ohro
Wakefreld, Mass.
Cedar Knolls. N.J.
Sumervrlle. N. J.
Hartford, Con”.
Myrlle Beach, S. C.
Chrcago. III.
Palo Alto, Calil.
Phoenrx. Arrzona
Culver crty. Calrl.
El Monte, Calrf.
Westchester, III,
Youngwood. Pa.
San M&O, CallI.
Alphabetical codes have been arbitrarily assigned t0
Code
No. Address
Barber Colman Co.
05624
05728 Tiflen Optrcal Co.
05729 Melro.Tel Corp. Westbury, N.Y.
05783 Stewart Eng~neerlng Co. Santa Cruz, Calif.
05820 Wakelreld Engrneerrng Inc. Wakefreld, Mass.
06004 Bassrck Co., The Budgeport, Co”“.
Raychem Corp.
06090
Bausch and Lomb Oplrcal Co.
06175
E. T. A. Products Co. of Amerrca
06402
Amatom Efeclronrc Hardware Co Inc.
06540
06555
Beede Eleclrrcal Instrument Co., Inc.
06666
General oevrces co., Inc. Indranapolrs, Ind.
06751
Semcar DIV. Componenls Inc. Phoenrx. Arrz.
Torrrnelon MIP. Co.. West DIV.
06812
Varian Assoc. Ermac DIV. San Carlos, CalIf.
06980
Kelwn Electric Co. Van Nuys, Callf.
07088
Drartran Co.
07126
Transrstar Electronrch Coro
07137
Westrnghouse Electrrc Corp.
07138
Electronic Tube Div.
07149
Frlmohm Corp. New York, N. Y.
07233
Cl”ch.Graph!k Co. City 01 Industry, Calrf.
07261
Avnet Cow Culver City, Calif.
Farrchrld Camera 8. lnsl. Corp.
07263
Semrconductor Div.
Mrnnesota Rubber Co.
07322
Brrtcher Corp., The Monterey Park, Calrf.
07381
07700
Technrcal Wrre Products Inc. Cranford, N. J.
079 IO
Conlrnental Devrce Corp. Hawthorne, Calif.
07933
Raytheon Mfg. Co.,
Semrconductor DIV.
Shockley Semr-Cooductor Labaralarres
07966
07980
Hewlett-Packard Co., Boonton Radro Orv.
08145
U.S. Engrneerrng Co. Las Angeles. Calif.
08289
Blrnn, Delberl Co. Pomona. Calrf.
08358
Burgess Battery Co.
Brrstal Co.. The
08664
Sloan Company Sun Valley, Calif.
08717
08718
ITT Cannon Eleclrrc Inc., Phnenrx DIV.
CBS Electronrcs Semrconductor
08792
Operations, Drv 01 C. B.S. Inc.
Mel.Rai”
08984
Babcock Relays DIV
09026
Texas Capacrtor Ca
09134
Alohm Electronics
09145
09250
Electro Assemblres. Inc. Chicago, Ill.
09569
Mallory Battery Co of
Canada, Ltd. Toronto, Ontarro, Canada
General Transrstor Western Corp.
10214
10411
TI-Tal, Inc. Berkeley, Calrf
10646
Carborundum Co. Niagara Falls, N.Y,
11236
CTS of Berne, Inc. Berne. Ind.
Chrcaeo Teleohone 01 Calrlornra. Inc.
IndIana General Corp., Electronics DIV.
General Instrument Corp., Cap. DIV. Newark, N. J.
72693
Drake Mfg. Co. Chxago, III.
72765
Hunh H. Ebv Inc. Phlladelohla. Pa.
72825
72928
Gudefnan co.
Howard B. Jones DIV.
Southampton. Pa.
Weslmlnster. Md.
Garden Ctty. N. Y.
Union City, N. 1.
Llndenhursl L. I., N. Y.
Providence, R. I.
West Orange. N. J.
Elizabeth, N.J.
St. Paul, Mi”“.
Hartlord, Con”.
Chicago, Ill.
St. LOUIS, MO.
Burbank, Callf.
Milwaukee. Wis.
ChIcago, Ill,
MIdland, Mich.
Chicago, III.
Brooklyn, N. Y.
Keasby. N. J.
Cht;agQ, Ill.
Code
Mallulocturcr Address
No.
Robert M. Htdley Co. Los Angeles, Callf.
72364
72982
Efle Technolog!cal Products, Inc. Erie. Pa.
73061
Hansen Mfg. Co., Inc. PrInceto”, Ind.
73076
H.M. Harper Co. Chlcago, Ill.
13138
Hellpot DIV. of Beckman Inst., Inc.
73293
Hughes Products ll~v~s!on of Hughes
Aircraft Co. Newport Beach, Callf.
73445
Amperex Electronic Co. I DIV. of North America”
Phllllps Co., Inc.
Bradley SemIconductor Corp. New Have”. Con”.
73506
Carllng Electric. Inc. Hartford, Conn.
73559
73586 c1rcie F Mfg co Trenton. N J
73682 Geotee K. Garrett Co.. DIV. MSL
Industries Inc. Philadelphia, Pa.
73734
Federal Screw Producls Inc. ChIcago. Ill.
73743
Fischer Special Mfg. Co. Cincinnati, Ohio
73793
General lndustrler Co., The Elyria, Ohio
73846
Goshen Stamping 8 Tool Co. Goshen, Ind.
73899
JFD Etectronlcs Corp. Brooklyn. N.Y.
73905
Jennings Radio Mfg. Corp. San Jose. Callf.
74276
Slgnallte Inc. Neptune, N. J.
74455
J.H. W~nns. and Sons
lndustrtal Condenser Corp. ChIcago, ill,
74861
74868
R. F. Products Dlvlsion of Amphenol-Borg
ElectronIts Corp. Danbury, Con”.
14970
E. F. Johnson Co. Waseca, Minn.
15042
lnternatlonal Resistance Co. Philadelphia, Pa.
75378
CTS Knights Inc. Sandwlch, III.
15302
Kulka Electric CarporatIon Mt. Vernon, N.Y.
Lenz Electrlc Mfg. Co. Chtcago, III.
75818
LIttlefuse, Inc. Des Plainer, III,
75915
76005
Lord Mfg. Co.
C. W. Marwedel San Ftancisco, Calif.
76210
76487
James Mullen Mfg. Co., Inc. Malden, Mass.
76493
J. W. Miller Co. Los Angeles, CalIf.
Cinch-Monadnock, Div. of Untted Carr
76530
Fastener Corp. San Leandro, Callf.
16545
Muell.er Electric Co. Cleveland, Ohio
76703
National U”IO” Newark, N.J.
76854
Oak Manufacturing Co. Crystal Lake, Ill,
77068
Bendix Corp., The
Bendix Pacific Div. N. Hollywood, Calif.
77075
Paclflc MelaIr co.
77221
Phanostra” Instrument and Electronic Co.
11252
Phlladelphla Steel and Wtre Corp.
71342
American Machine & Foundry Co. Potter
8 Blumfletd DIV. Princeton, Ind.
71630
TRW Electronic Components DIV. Camden, N. J.
77638
General instrument Corp., Rectiller DIV.
77764
Reslrtance Products Co.
77969
Rubbercraft Corp. of Callf.
Shakeproof Olvislon of llllnois Tool Works
78189
Signal lndlcator Corp. New York, N.Y.
78283
Slruthels-Dunn Inc. Pitman, N. J.
18290
78452
Thompson-Bremer 8 Co. ChIcago, III.
78471
Ti Hey Mfg. Co. San Francisco, Callf.
78488
Stackpole Carbon Co. St. Marys, Pa.
78493
Standard Thomson Corp. Waltham, Mass.
78553
TInnerman Products, Inc. Cleveland, Ohlo
Transformer Engineers San Gabriel, CalIf.
78790
uc\n\te co. Newtowlle. Mass.
76941
79136
Waldes Kohlnoor Inc. Long Island City, N. Y.
79142
Veeder Root, Inc. Hartford, Conn.
79251
Wenco Mfg. Co.
79727
Continental-Wlrt Electronics Corp.
Zlel!ck Mfg. Corp. New Rochelle. N.Y.
79963
Fullerton, Calif.
Hlcksvllle, N.Y.
WInchester, Mass,
EII~, Pa.
San Francisco, Callf.
South Pasadena, Calif.
Philadelphia. Pa.
Brooklyn. N.Y.
Harrisburg. Pa.
Torrance, Calif.
Elgl”. III.
ChIcago, ill.
Philadelphia, Pa.
Code
No.
Manulocturcr
80031
Mepco DIVISION of Sessions Clack Co.
a0120
Schnltrer Alloy Ploducts Co. Elizabeth. N. J.
T!mes Telephoto Equipment New York, N.Y.
80130
80131
Electronic lndustrles Assoclatlon. Any brand
Tube meeting EIA Standa,ds.Washlngton, DC.
80207
Unlmax Switch. DIV Maxo” Electronics Corp.
United Transformer Carp New York, N. Y.
80223
Oxford Electr,c Corp. ChIcago. III.
80248
Bourns Inc RiversIde. Callf.
80294
80411
Acre DIV. 01 Robertshaw Canlrols Co.
80486
All Star Ploducts Inc. Defiance, Ohlo
80509
Avery Adhesive Label Corp. Monrovia, Callf.
80583
Hammarlund Co., Inc. New York, N. Y.
80640
Stevens, Arnold, Co., Inc. Boslan, Mass.
81030
lntefnatlonal Instruments Inc. orange, CO”“.
81073
GrayhIll Co. LaGrange, Ill.
81095
Triad Transformer Carp.
al312
WInchester Elec. DIV. Litton Ind., Inc.
a1349
Mllltary Speclflcatlon
at483
lnternatlonal Rectlfler Corp. El Seg;“bo: ca;,l:
a1541
A~rpax Electronics, Inc.
81860
Barry Controls. OIV Barry Wright Carp.
Carter Preclsto” Electric Co. Skokle. III.
82042
82047
Sperll Faraday Inc., Copper Hewtt
Electric DIV. Hoboken. N. J.
Jellers Electronics D~vlslon 01 Speer
82142
Carbon Co. Du BOIS, Pa.
a2170
FaIrchIld Camera 8 Inst. Corp.,
Defense Prod. Dtvislon Clifton, N. J.
82209
Magulre Industries, Inc.
82219
Sylvania Electric Prod. Inc.
Electronic Tube DIVISIQ~
Astro” Corp. East Newark, Harr\so”, N, J,
82376
82389
SwItchcraft. Inc. Chicago, Ill.
82647
Metals & Controls Inc. Spencer Products
82768
Phllllps-Advance Contlol Co. Jallet. III.
82866
Research Products Corp. Madlsan. WIS.
a2877
Ralro” Mfg. Co., Inc. Woodstock, N.Y.
a2893
Vector Electronic Co.
83053
Western Washer Mfg. Co.
Carr Fastener Co. CambrIdge, Mass.
83058
83086
New Hamprhlre Ball Bearing. Inc.
83125
General Instrument Carp., Capacitor DIV.
B314R
ITT Wire and Cable DIV.
83186
Victory Engineering Corp. Sprlngfleld. N. J.
a3298
Bendix Corp.. Red Bank DIV. Red Bank, N. J.
Hubbell Carp Mundelsl”. Ill.
83315
83330
Smllh. Herman H., Inc. Brooklyn, N.Y.
Cenlral Screw co. ChIcago, Ill.
83385
Gavltt Wire and Cable Co
83501
DIV. 01 Amerace Carp. Brookfleld. Mass.
83594
Burroughs Corp. ElectronIt Tube DIV.
UnlQn CarbIde Corp. Consumer Prod. DIV.
83740
83777
Model Eng. and Mfg., Inc
83821
Loyd Scruggs Co. Feslus, MO.
83942
Aeronautical Inst. & Radio Co. Lodl. N.J.
84171
Arco Electronics ln~.
84396
A. 1. Glesener Co., Inc. San Franc~sco, Callf.
84411
TRW Capacitor DIV. Dgallala, Neb.
84970
Sarkes T$rz~an, Inc. Bloom~nglon, Ind.
85454
Boonton Molding Company Boonlon, N. J.
Walllngford. Con”.
CambrIdge, Mass.
Greenwich, Cann.
Los Angeles, Callf.
Pelerborough. N. H.
Los Angeles, CallI.
Great Neck, N.Y.
Address
Morristown. N.J.
Columbus, Clhw
VeIlIce, CalIf.
Dakvllle, Corm.
Watertown, Mass.
Emporium, Pa.
Allleboro, Mass.
Glendale, Cal~f.
Darlington. S. C.
Plalnfleld, N.J.
New York, N.Y.
HuntIngton. Ind.
00015-42
Rwsed: July, 1966
02056-4
From: FSC. Handbook Supplements
HI-1
H4-2
Dated JULY 1965
Dated NOV. 1962
6-23
Section VI
&de
MumJfocfurcr Address
No.
85471 A.B. Boyd Co. San Franctsco, CallI.
85474 R. M. Bfacamonfe 8 Co. San Franc~sco, Calif.
85660 Kolled Kolds. Inc. Hamdeo, Corm.
85911 Seamless Rubber Co. ChIcago, III.
86197 Cl~ftan Precwoo Products Co., Inc.
86579 Precision Rubbel Products Corp. Dayton, Ohlo
86684 Radio Colp. of America, Electronic
Camp. 8 Devlcer DIV. Harrison, N. J.
87034 Marco Industries Anaheim, Caflf.
87216 Phllco Corporation (Laosdale Dlvislont
87473 Western Fibrous Glass Products Co.
87664 Van Waters g Rogers Inc. San Franc~sca, Calif.
87930 Tower Mfg. Corp. Providence. R. I.
88140 Cutler-Hammer. Inc. Llncaln, Ill.
88220 Gould-NatIonal Eattenes, foe. St. Paul. Mlnn.
88421 Federal Telephone 2. ifadlo Corp. Clifton, N. J.
88698 General MlllS, Inc. Buffalo, N. Y,
a9231 Graybar Electric Co. Oakland, Calif.
69665 UnIted Transformer Co. Chicago, 111.
90179 US Rubber Co., Consumer Ind 8 Plastics
Prod. DIV.
90970 Bearing Englneerlng Co. San Franc~sco, CalIf.
91260 Connor Spring Mlg. co. San Francisco, CalIf.
91345 Mlfler Dtal g Nameplate Co. El Monte, Caflf.
91418 Radio Maler~als Co. Chicago, Ill.
91506 Augat Inc. Attleboro, Mass.
91637 Dale Elecfronlcs. Inc. Columbus, Nebr.
91662 Elco Corp. Willow Grove, Pa.
91737 Glemar Mfg. Co., Inc. Wakefield, Mass.
91827 K F Development Co. Redwood City, Callf.
91886 Malco Mfg Co.. Inc
91929 Honeywell Inc., Micra Swllch DIV.
91961 Nahm-Bras. Spcrng Co. Oakland, CalIf.
92180 TIU-Connector Corp. Peabody, Mass.
92367 Efgeet Optical Co. Inc. Rochester, N.Y.
92196 Universal fndustues. Inc. City ol Industry, Calif.
92607 Tensollte fnsulated WII~ Co., Inc.
93332 Sylvania Electric Plod. Inc.
Semiconduclar OIV.
93369 RobbIns and Myers, Inc.
93410 Stevens htfg co., IllC
93929 G.V. Controls
Clifton Heights, Pa.
Lansdale. Pa.
San Francisco. Caflf.
Passaic, N. 1.
ChIcago, If1
Fleeport. III.
Tarrytown, N.Y.
Woboro. Mass.
New York. N.Y.
Mansfield, Ohio
Llvlogston, N. J.
Table 6-3. Code List of Manufacturers. (Cont’d)
Code Code
No. Mmufochlrsr Address
94137 Genelal Cable Corp.
94144 Raytheon Co., Camp. DIV., Ind.
Camp. Operations Qumcy. Mass.
94148 Sclentlflc Eiectlonlcs Products. Inc.
94154 Tong-Sol Electric, Inc. Newark, N.J.
94197 Curhss-Wright Corp. Electronics DIV.
94222 Sooth Chester Corp. Chester, Pa.
94310 Tru-Ohm Products Memcor Components Div.
94330 Wire Cloth Products, Inc. Bellwood, Ill.
94682 Worcester Pressed Afumwm Corp.
94696 Magnecraft Eleclr~c Co. Chicago, III.
95023 George A. PhIlbrick Researchers. Inc.
95236 Alfles Products Corp. Mlaml. Fla.
95238 ContInental Connector Corp. WoodsIde, N. Y.
95263 Leecraft Mfg. Ca., Inc. Lang Island, N.Y.
95264 Lerco Electronics, Inc. Burbank, Cafif.
95265 National Co11 Co. Sheudan. Wyo.
95275 Vitramon. Inc. Bridgeport. Coon.
95348 Cordos Corp.
95354 Methode Mfg. Co.
95712 Dage Electric Co., Inc.
95984 Slemon Mfg. Co.
95987 Weckessel Co. ChIcago, Ill.
96067 Hugg~ns Laboratones Sunnyvale, CalIf.
96095 Hi-Q DIV. of Aerovox Corp. Olean, N.Y.
96256 Thordarson-Meissner Inc. Mt. Carmel, Ill.
96296 Solar Manufacturing Co. Los Angeles, Calif.
96330 Carlton Screw Co.
96341 hcrowave Assoc!ates, Inc.
96501 Excel Transformer Co.
97464 Industrial Retainlog Ring Co.
97539 Automatic g Pwcislon Mfg.
97979 Reon Resistor carp.
97983 Litton System Inc., Adler-Westrex
Commun. DIV.
98141 R-Tronc~s, Inc. Jamaica, N.Y.
98159 Rubber Teck, Inc. Gardena, Calif.
98220 Hewlett-Packard Co., Moseley Div.
98278 Mwodot, ItIC.
98291 Sealectro Corp.
Bayonne, N. J.
Loveland, Cola.
East Paterson, N.J.
Huntington. Ind.
Worcester. Mass.
Boston, Mass.
Bloomfield. N. J.
Chicago, III.
FrankIln, fnd.
Wayne. Ill.
ChIcago, III.
Burlington, Mass.
Oakland, Callf.
Irvington, N. J.
Englewood, N. J.
Yonkers, N.Y.
New Rochefle, N.Y.
Pasadena, Calif.
So. Pasadena, Calrf.
Mamaroneck, N. Y.
No. Manufacturer Addl-?SS
98376 Zelo Mfg. CO.
98731 Genelaf MIIIs Inc., Electronics Oiv.
98734 Paeco DIV. 01 Hewlett-Packard Co.
98821 North Hills Electranlcs, Inc. Glen Cove, N.Y.
98978 lnternatlonal Electronic Research Corp.
99800 Delevan Electronics Cup. East Aurora, N.Y.
99848 WIICO Corporation
99934 Renbrandt, Inc.
99942 Hoflmao Electronics Corp.
99957 Technology Instrument Corp. of Calil.
THE FOLLOWING HP VENDORSHAVENONUMBER
ASSIGNED IN THE LATEST SUPPLEMENT TO THE
FEOERAL SUPPLY CODE FOR MANUFACTURERS
HANDBOOK.
OOOOF
OOOOM
ooaoz
OOOAA
OOOAB
OOOBB
OOOMM
OOONN
OOOQQ
oooww
OOOY Y
Model 214A
Burbank, Calif.
Mmneapolls, Mtnn.
Palo Alto, CalIf.
Burbank, Callf.
WInchester, Mass.
San Manno. CallI.
of America El Segundo, Callf.
Indianapolis, Ind.
Boston. Mass.
Semiconductor DIV. El Monte, Callf.
Newbury Park. Calll.
Malco Tool and Die Los Angeles, Callf.
Weslew Coil Div. of Automatic Ind., Inc.
Willow Leather Products Corp.
British Radio Electronics Ltd.
ETA England
Preclslon Instrument Components Co.
Rubber Eng. g Development Hayward, Callf.
A “N” 0 Mfg. Co. San Jose, Callf.
CQQltlOn Oakland, Calif.
Cal,fornla Eastern Lab. Burlington, CalIf.
S. K. Smith Co. Los Angeles. CalIf.
Redwood City, CallI.
Newark, N. 1.
Washington. D. C.
Van Nuys, Callf.
06480 North American Electronics, Inc
Lynn, Mass.
28520 Heyman Mfg. Co. Kenilworth, N. J.
78526
Stonyck Winding Co. Newburgh, N. Y.
00015-42
Aevlsed: July, 1966
6-24
From. FSC.
Handbook Supplements
H4-I Dated JULY 1965
HI-2 Dated NOV. 1962
02056-l
Model 214A
Appendix I
APPENDIX I
MANUAL CHANGES
Appendix I contains information on changes required
to adapt this manual to aMode 214A Pulse Generator
manufactured prior to the printing of this manual.
Check for your instrument serial prefix in the lefthand column of the table below and make the numbered
changes indicated. Make the changes in the order
listed. If the serial prefix of the instrument is not
812- or listed below, the information to adapt this
manual to that Model 214A will be found in the change
sheet supplied with the manual.
Errata in the manual, refer to the change sheet.
Note
These changes adapt the manual to cover
the standard instrument as manufactured
and therefore do not apply to an instrument
subsequently modified by the factory or in
the field.