HP Toaster 4815A User manual

HP Toaster 4815A User manual
TE TT CT TY ETT ERT aT
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OPERATING AND SERVICE MANUAL
MODEL 4815A
RE VECTOR IMPEDANCE METER
SERIALS PREFIXED 631
1966
Hewlett-Packard Company
Copyright
Rockaway, New Jersey, U. 5. A.
Green Pond Road
Printed: AUGUST 1966
04815-90011
Section I
Tables 1-1, 1-2
Table 1-1.
Model 4815A
Specifications
FREQUENCY
Range: 500 kHz to 108 MHz in five bands: 500
kHz to 1.5 MHz, 1.5 to 4.5 MHz, 4.5 to 14
MHz, 14 to 35 MHz, 35 to 108 MHz.
Accuracy: +2% of reading, +1% of reading at
1.592 and 15.92 MHz.
RF monitor output: 150 mV minimum into 50
ohms.
IMPEDANCE MAGNITUDE MEASUREMENT
Range: 1 ohm to 100K ohms; full-scale ranges:
10, 30, 100, 300, 1K, 3K, 10K, 30K, 100K
ohms.
Accuracy: +4% of full scale + ( Í + я ) %
ana: E40 30 MHz 25KQ?”
of reading, where f = frequency in MHz and Z
in ohms; reading includes probe residual impe-
dance.
Calibration: linear meter scale with increments
2% of full scale.
PHASE ANGLE MEASUREMENT
Range: 0 to 360° in two ranges: 0 + 90°, 180°
+ 909,
f , 2
30 MHz 25 KQ
where f = frequency in MHz and Z is in ohms.
Accuracy: +(3+ ) degrees;
Calibration: increments of 2°.
Adjustments: front panel screwdriver adjustments
for Magnitude and Phase Zero.
RECORDER OUTPUTS
Frequency: O to 1 volt from 0 to 1K ohm source,
proportional to dial rotation.
Impedance magnitude: 0 to 1 volt from 1K ohm
source.
Phase angle: 0 + 0.9 volt from 1K ohm source.
ACCESSORIES FURNISHED:
1. 00600A Accessory Kit.
2. Rack Mounting Kit.
3. Plugin board extender.
DIMENSIONS:
_ „и NOTES:
-- 3 (8) DIMENSIONS IN INCHES
AND (MILLIMETERS).
183
8 REAR APRON RECESS.
(552,3)
(C) DETACHABLE POWER CABLE.
TOP ; (D) RECOMMENDED CABLE
163 CLEARANCE
(501,7)
a
|t25,4) L | |
90 (2286,0) (©) 19,10)
|9 (482,8) |
32 (8,7?
п бич A
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POWER CORD RECEPTACLE и
WEIGHT: net 39 lbs.
(22,5 kg).
(17,6 kg), shipping 50 lbs.
POWER: 105 to 125 v or 210 to 250 v, 50 to 400 Hz,
50 w. |
Table 1-2.
Additional Information
MEASURING TERMINAL CHARACTERISTICS
Configuration: Both excitation and measuring
circuits are contained in a single sampling
probe attached to instrument by a cable.
Measurement is made between probe center
pin and ground pin on probe case.
Residuals: indicated impedance includes approx-
imately 0.5 ohm resistance and 8 nH induc-
tance in series with the unknown, and 0.3 pF
capacitance in parallel with the unknown.
Impedance: 25 ohms in series with 0.01 uF,
looking into probe. Probe is constant-current
driving source to circuit being measured.
TEST SIGNAL CHARACTERISTICS
Waveshape: sinusoidal.
Level: approximately 4 HA on all ranges except
10-ohm scale where it is approximately 13 uA.
External oscillator input: Rear BNC connector
accepts excitation signal, 100 mV +10% into
50 ohms; maximum instantaneous rate of
change 1 MHz/s.
RFI CHARACTERISTICS
Conducted and radiated leakage limits are below
those specified for MIL-1-6181D, except for RF
excitation and sampling pulses emitted from
probe. The sampling pulses are approximately
75 mV peak to peak, from 25-ohm source, with
a duration of 3 ns occurring at a maximum repeti-
tion rate of 1 MHz. Probe may be stored in front
panel probe check socket to obtain full compliance
with MIL-1-6181D.
SELF-CONTAINED CALIBRATION
Probe check: 100 ohms +. 5% at phase angle of
09 +29,
1-0
Model 4815A
1-1. DESCRIPTION.
1-2, The Model 4815A RF Vector Impedance Meter
(Figure 1-1) is a general purpose, self -contained in-
strument for measuring complex impedance in a wide
variety of laboratory applications as well as produc -
tion testing of circuits and components. The fre-
quency range is 0.5 to 108 MHz; impedance magni-
tude is measured in 9 ranges from 10 © to 100 KQ
full scale; and phase angle between 0° and 360° is
indicated on two ranges.
1-3. Impedance measurement is made at the tip of
a probe that is at the end of a 5 ft. cable, with rf test
signal and measuring circuits brought close to the
probe tip to reduce residual impedances.
1-4. An internal rf oscillator, 0.5 to 108 MHz
supplies a test signal to the unknown impedance,
12.6 pa on the 10 ohm range and 4 pa on all other
ranges. Provision is made for using an external rf
source, particularly useful when measuring quartz
crystals and other high Q devices.
Section I
Paragraphs 1-1 to 1-9
SECTION |
GENERAL INFORMATION
1-5. Dec voltages proportional to magnitude, phase
and frequency are available at the rear panel for
recording equipment.
1-6. Complete specifications are given in Table 1-1.
1-7. Additional information on the Model 4815A is
given in Table 1-2. The characteristics are general
design parameters that are useful in the application
of the Impedance Meter.
1-8. ACCESSORIES FURNISHED.
1-9. Accessory kit number 00600A is supplied with
the 4815A. The kit consists of adapters for probe to
BNC and Type N connectors, a probe socket for use
on circuit boards, a component mounting adapter,
probe holder, probe ground assembly and center pins.
The probe accessories are described in detail in Par-
agraphs 1-9 to 1-16 and shown in Figure 1-1 and 1-2.
Also supplied is a rack mounting kit with hardware
(-hp- Stock No. 5060-0776) and a circuit board exten-
der for servicing.
Figure 1-1. Model 4815A RF Vector Impedance Meter
with 00600A Probe Accessory Kit
Section I
Paragraphs 1-10 to 1-21
1-10. PROBE ADAPTER. This adapter converts
the probe tip to a male type N connector and is avail-
able under accessory number 102064.
1-11. PROBE TO BNC ADAPTER. With the use of
the 10206A accessory, this adapter converts the
probe tip to a male BNC connector and is available
under accessory number 10207A.
1-12. PROBE SOCKET. This socket supports the
probe and guides the center pin to the test point. An
excellent ground return is obtained with the socket,
which is available under accessory number 10210A.
1-13. COMPONENT MOUNTING ADAPTER. This
adapter allows many types of components to be mea-
sured with minimum addition of residual impedance
to affect measurements, and is separately available
as accessory number 00601 A.
1-14. PROBE GROUND ASSEMBLY is a grounding
device that may be positioned at a convenient point on
the probe barrel. A spring-loaded pin makes ground
contact. This accessory is available as -hp- Stock
No. 187B-21A-8.
1-15. PROBE CENTER PINS. Six additional center
pins are supplied against possible damage or loss.
The small-diameter end of the center pin is inserted
into the mating jack in the probe tip.
00601A
Component Mounting Adapter
Ep,
187 B-21A-8
Probe Ground Assembly
Model 4815A
1-16. PROBE HOLDER. This accessory clips onto
the front handle of the 4815A to hold the probe when
not in use, and is available separately as -hp- Stock
No. 5040-0404
1-17. ACCESSORIES AVAILABLE.
1-18. SHIELDED BANANA PLUGS TO FEMALE
BNC. This adapter converts banana post inputs to
shielded BNC, and is available as accessory 10111A.
The adapter has approximately 10 pF shunt capacity.
1-19. INSTRUMENT IDENTIFICATION.
1-20. Each Model 4815A is identified by an eight-digit
(000-00000) serial number on the rear panel. The
five digit number is an identification number unique
to each instrument and the three digit number is a
serial prefix number used to document changes.
1-21. All instruments with the same serial prefix are
the same. The group of instruments to which this
manual applies directly is identified on the title page.
For instruments with serial numbers higher than those
listed on the title page, a Manual Change sheet de -
scribing the changes is included with the manual.
The manual for an instrument having special electrical
modifications will include an insert sheet describing
that modification. If a change sheet or special infor-
mation sheet is missing, the information can be sup-
plied by any Hewlett-Packard Sales and Service Office
listed at the back of this manual.
5040-0404
Probe Holder
10206A
Probe Adapter
NEED
04815-200770 LL
Probe Center Pins
Figure 1-2.
1-2
10210A
Probe Socket
Probe Accessories
Section IV
Model 4815A
Figure 4-1
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