Electro-Metrics - EMC-11 - Analizador
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Equipamiento:
EMC-11
Fecha:
1985
Categoría:
Grupo:
Subgrupo:
Información
EMC-11 INTERFERENCE Analyzer The EMC-11 Interference Analyzer is designed to perform
emission and susceptibility testing to MIL-STD-461A/B, -462,
-285 plus other applicable military, government, and
commercial — both domestic and international — standards
from 20 Hz to 50 kHz.
The receiver incorporates a differential front end with a
Twinax connector to eliminate ground loop problems and
permit balanced or floating measurements. In addition, the
receiver has four selectable input impedances, nine
selectable detection bandwidths plus two selectable low pass
and four selectable high pass input Filter networks. A
voltage controlled Oscillator is used for tuning the
receiver with the tuned frequency indicated by a liquid
crystal display. A dual metering system, with digital and
analog output meters, is used to indicate the input signal
level. The digital meter (liquid crystal display) circuitry
automatically adds the total receiver attenuation to the
meter indication. In addition, there is a provision for
displaying the actual attenuation level on the same meter
when required. Meter functions include AVERAGE (CARRIER),
RMS, PEAK, QUASI-PEAK, and SLIDEBACK PEAK. The receiver is
amplitude calibrated using an automatic calibration circuit
which eliminates the requirement for a manual IF/RF gain
control function.
Five OUTPUT functions, available at the front panel OUTPUT
connector and selected by the OUTPUT FUNCTION Switch, are
BFO, RESTORED, LINEAR VIDEO, IF, and TRACK. Rear panel
connectors are provided for the X-Y plotter outputs, REMOTE
CONTROL inputs/outputs plus the horizontal and vertical
outputs for CRT presentations. The majority of the receiver
functions can be remotely controlled using either a
programmer or computer/calculator system. An IEEE Interface Bus option is also available on special request.
1 Manual
Manual del usuario
Tipo manual:
Manual del usuario
Páginas:
76
Tamaño:
4,2 MB
Idioma:
ingles
Revisión:
Manual-ID:
843-2600
Fecha:
agosto 1985
Calidad:
Documento escaneado, todo legible.
Fecha de carga:
16 de agosto de 2017
MD5:
85d7a412-4206-aeba-f8b3-97a2d4f2fa36
Información
I INTRODUCTION AND
SPECIFICATIONS..................................1-1
1.1
Introduction.............................................................1-1
1.2 EMC-11 Interference Analyzer 1-1
1.3
Unpacking..............................................................1-1
1.4 Electronic Shipping Damage
..............................................1-1
1.5
Installation..............................................................1-1
1.6 Receiver Specifications
...................................................1-2
1.7 Mechanical
Construction.................................................1-2
1.8
References..............................................................1-2
II OPERATING
INSTRUCTIONS............................................2-1
2.1
General........................................*........................2-1
2.2 Operational
Precautions..................................................2-1
2.2.1 Power Source
Selector...................................................2-1
2.2.2 Tuning Mode
Switch.....................................................2-1
2.2.3 Input
Voltage............................................................2-1
2.3 Control
Functions........................................................2-1
2.3.1 Filter witches....................*......................................2-1
2.3.11 Low Pass Filter witch....................................................2-1
2.3.1.2 High Pass Filter witch .,....
—.........................................2-1
2.3.2 Impedance
Switch.......................................................2-1
2.3.3 Frequency
Control.......................................................2-1
2.3.3.1 Tuning
Control..........................................................2-1
2.3.3.2 Fine Tune Control
.......................................................2-1
2.3.3.3 Frequency Display
..............----................................2-1
2.3.3.4 Frequency Scale Selector
Switch..........................................2-4
2.3.3.5 Tuning Mode
Switch.....................................................2-4
2.3.3.5 AFC
Switch.............................................................2-4
2.3.4 Sweep Function
Controls.................................................2-4
2.3.4.1 Sweep Width/Rate
Control................................................2-4
2.3.4.2 Sweep Start Switch
......................................................2-4
2.3.5 Bandwidth
Switch........................................................2-4
2.3.6 Detection
Switch.........................................................2-4
2.3.6.1 Average
(Carrier)........................................................2-4
2.3.6.2
RMS....................................................................2-4
2.3.63
PEAK...................................................................2-4
2.3.6.4
QUASI-PEAK............................................................2-4
2.3.6.5 SUDEBACK
............................................................2-5
2.3.6.5.1 Threshold Control
.......................................................2-5
2.3.7 Amplitude
Indication.....................................................2-5
2.3.7.1 Digital
Meter............................................................2-5
2.3.7.2 Analog
Meter............................................................2-5
2.3.8 Attenuation
Circuit.......................................................
2-5
2.3.8.1 Attenuation
Switches.....................................................2-5
2.3.8.2 Attenuation Display
Switch................................................ 2-5
2.3.9 Calibration Function
.....................................................2-5
2.3.9.1 Cal
Switch..............................................................2-5
2.3.10 Output Function Switch
.................................................. 2-5
2.3.10.1
IF......................................................................2-5
2.3.10.2
BFO....................................................................2-5
2.3.10.3
RESTORED.............................................................2-6
2.3.10.4
TRACK.................................................................2-6
2.3.10.5 LINEAR
VIDEO..........................................................2-6
2.3.10.6 Output Level
Control.....................................................2-6
2.3.11 Audio
Function..........................................................2-6
2.3.11.1 Audio Volume
Control....................................................2-6
2.3.12 Power
Switch............................................................2-6
2.3.13 Battery
Indicator.........................................................2-6
2.3.13.1 Battery Test Switch
......................................................2-6
2.3.13.2 Charge
Indicator.........................................................2-6
2.4 Front Panel Connectors
..................................................2-6
2.4.1 Input
Connector.........................................................2-6
2.4.2 Probe Connector........................................................2-6
2.4.3 Output
Connector.......................................................2-6
2.4.4 Audio
Output............................................................2-6
2.5 Rear Panel
Connectors..............*....................................2-6
2.5.1 Scope
Connectors.......................................................2-6
2.5.2 X-Y Plotter
Connector....................................................2-6
2.5.3 Remote
Connector.......................................................2-6
2.5.4 AC Power
Connector.....................................................2-6
2.5.5 External DC Input
Connector..............................................2-6
2.6 Power
Supply...........................................................
2-6
2.6.1 Power
Requirements.....................................................2-6
2.6.2 Power Source Selector
..................................................2-6
2.6.3 Fuse
Specifications......................................................2-7
2.6.4 Battery Operation (Optional)
..............................................2-7
2.6.5 Battery Power
Supply....................................................2-7
2.6.6 Charging the
Battery.....................................................2-7
2.6.7 Battery Protection
Circuits................................................ 2-7
2.6.7.1
Overcharging............................................................2-7
2.6.7.2 Excessive Discharge
.....................................................2-10
2.6.8 External PC Operation
...................................................2-10
2.7 Remote
Operation.......................................................2-10
2.8 Operating
Procedures....................................................2-10
2.8.1 Initial Power Up Procedure..
.............................................2-10
2.8.2 CW
Calibration..........................................................2-10
2.8.2.1 Calibration
Accuracy.....................................................2-11
2.8.3 Signal
Measurements.....................................................2-11
2.8.3.1 Conducted Signal Measurement
Considerations.............................2-11
2.8.3.2 Electric Field Strength
Measurement....................................... 2-12
2.8.3.2.1 PEF-10A Operational
Use.................................................2-13
2.8.3.2.2 PEF-10A Calibration
Procedure............................................2-13
2.8.3.2.3 Calibration Signal Level
Check............................................2-14
2.8.3.3 Overload and Noise
Indications............................................2-14
2.8.4 Tuning the EMC-11 2-14
2.8.4.1 Signal Amplitude
Measurement............................................2-14
2.B.4.2 Signal Frequency Measurement
...........................................2-14
2.8.4.3 Tuning A Specific
Frequency..............................................2-15
2.8.5 EMC-11 X-Y Recorder
Operation..........................................2-15
2.8.5.1
General.................................................................2-15
2.8.5.2 EMC-11 X-Y Recorder Calibration
.........................................2-15
2.8.5.3 EMC-11 X-Y Recorder
Operation..........................................2-15
2.8.6 EMC-11 Oscilloscope Operation...........................................2-16
2.8.6.1
General.................................................................2-16
2.8.6.2
Operation...............................................................2-16
III PERFORMANCE
CHECK.................................................3-1
3.1
General.................................................................3-1
3.2 When To Use Test Procedures
............................................3-1
3.3
Preliminary..............................................................3-1
3.3.1
Precautions.............................................................3-1
3.3.2 Control
Settings.........................................................3-2
3.3.3 Frequency Check
Points..................................................3-2
3.3.4 Signal Amplitude and Frequency
Accuracy.................................3-2
3.4 Performance Test
Procedures.............................................3-2
3.4.1 CW Voltage
Accuracy....................................................3-2
3.4.2 Frequency
Accuracy.....................................................3-2
3.4.3 Attenuation Accuracy
....................................................3-3
3.4.4 CW
Sensitivity..............*............................................3-3
3.4.5 Input Filter Check........................................................3-4
3.4.5.1 Low Pass Filter Check....................................................3-4
3.4.Ö.2 High Pass Filter Check...................................................3-4
3.4.6 Bandwidth (6
dB)........................................................3-4
3.4.7 IF
Rejection.............................................................3-5
3.4.8 Output Function
Check...................................................3-5
3.4.9 Spurious Response
......................................................3-6
3.4.10 Sweep Function
Check...................................................3-6
IV SERVICE, MAINTENANCE, AND
CALIBRATION............................4-1
4.1
General.................................................................4-1
4.2
Maintenance/Calibration/Repair...........................................4-1
4.2.1
Maintenance.............................................................4-1
4.2.2
Calibration..............................................................4-1
4.2.3
Repair..................................................................4-1
4.2.4 Test Equipment
Required.................................................4-1
4.3
Precautions.............................................................4-1
4.4
Troubleshooting.........................................................4-1
4.4.1 Troubleshooting
Procedure...............................................4-1
4.4.2 Other
Considerations.....................................................4-1
4.4.2.1 Control
Settings.........................................................4-1
4.4.2.2 Operational
Errors.......................................................4-2
4.4.2.3 Test Equipment
Accuracy.................................................4-2
4.4.2.4 Battery Test
(Optional)...................................................4-3
4.4.2.5 Remote Connector Voltages
..............................................4-3
4.5 Repair
Procedures.......................................................4-3
4.5.1
Method.................................................................4-3'
4.5.2 Printed Circuit Board
Precautions..........................................4-3
4.6 Instrument
Access/Disassembly/Assembty..................................4-3
4.6.1 Top/Bottom Cover
Removal...............................................4-3
4.6.1.1 Top Cover
Removal......................................................4-3
4.6.1.2 Bottom Cover
Removal...................................................4-3
4.6.2 Card Rack Assembly Cover
Removal.......................................4-4
4.6.3 Battery (A7)
Removal.....................................................4*4
4.6.4 Power Supply Module (A4)
Removal.......................................4-4
4.6.5 Front Panel Assembly
(A1)................................................4-4
4.7 Calibration/Alignment
Procedures.........................................4-4
4.7.1
General.................................................................4-4
4.7.2 Control
Settings.........................................................4-4
4.7.3 Preliminary Precautions
..................................................4-4
4.7.4 Power Supply Verification.................................................4-4
4.7.4.1 Regulated DC Voltage
Checks.............................................4-5
4.7.4.2 Power Supply Board A4A1
Adjustments....................................4-5
4.7.4.3 Battery Charger
Adjustment............................................... 4-5
4.7.5 Sweep Circuitry
Adjustment/Verification....................................4-6
4.7.5.1 Manual Tune Function
Adjustment/Verification..............................4-6
4.7.5.2 Plotter Function
Adjustment/Verification.................................... 4-6
4J.5.3 CRT Function Adjustment/Verification
.....................................4-6
4.7.6 Frequency Display Module
Verification/Adjustment..........................4-7
4.7.7 VCO
Adjustment/Verification..............................................4-7
4.7.8 Preamplifier/Attenuator
Adjustment/Verification.............................4-7
4.7.9 IF Amplifier Adjustment/Verification........................................4-7
4.7.9.1 IF #1 Board A2A5
Adjustment/Verification..................................4-8 V
4.7.9.2 IF #2 Board A2A6
Adjustment/Verification..................................4-8
4.7.9.3 IF #3 Board A2A7
AdjustmentA/erification..................................4-9
4.7.10 Detector Board A2A9
Adjustment/Verification...............................4-10 v
4.7.11 Log Circuitry
Adjustment/Verification......................................4-11
4.7.12 Cal/Tracking A2A15
Adjustment/Verification................................4-12
4.7.13 Cal Circuit Board A2A8
Adjustment/Verification.............................4-13
4.7.14 AFC Circuitry
Adjustment/Verification......................................4-13
V THEORY OF
OPERATION................................................5-1
5.1
General.................................................................5-1
5.2 EMC-11 Design
Criteria...................................................5-1
5.3 Synopsis Of Receiver
Operation...........................................5-1
5.4 Circuit
Description.......................................................5-3
5.4.1 Card Rack Assembly
A2..................................................5-3
5.4.1.1 A2A1 Input Switching
Board..............................................5-3
5.4.1.2 A2A2 Low Pass Filter Board...............................................5-3
5.4.1.3 A2A3 High Pass Filter Board..............................................5-3
5.4.1.4 A2A4 Preamplifier/Attenuator Board
.......................................5-3
5.4.1.5 IF Amplifier Boards: A2A5 IF #1, A2A6 IF #2, A2A7 IF
#3......................5-4
5.4.1.5.1 A2A5 IF #1
Board........................................................5-4
5.4.1.5.2 A2A6 IF #2
Board........................................................5-4
5.4.1.5.3 A2A7 IF #3
Board........................................................5-4
5.4.1.6 A2A8 Calibration Circuit
Board............................................5-4
5.4.1.7 A2A9 Detector
Board.....................................................5-5
5.4.1.8 Log Amplifier Circuit.....................................................5-5
5.4.1.9 A2A10 Voltage Controlled Oscillator (VCO) Board
...........................5-5
5.4.1.10 A2A11 Switching Logic
Board.............................................5-5
5.4.1.11 A2A12 Sweep Board
.....................................................5-5
5.4.1.12 A2A13 Sweep Control
Board..............................................5-6
5.4.1.13 A2A14 Audio Amplifier Board.............................................5-6
5.4.1.14 A2A15 Cal/Tracking
Board................................................5-6
5.4.2 A1A2 Frequency Display
Module..........................................5-7
5.4.3 A1A3 Digital Voltmeter
Module............................................5-7
5.4.4 A4 Power Supply Module.................................................5-7
VI ACCESSORY
DATA.....................................................6-1
6.1
Introduction.............................................................6-1
6.2 EMC-11 Standard Accessory
Items........................................6-1
6.3 EMC-11 Optional Accessory
Items........................................ .6-1
VII REPLACEABLE
COMPONENTS..........................................7-1
7.1
General.................................................................7-1
7.2 Replaceable
Assemblies................................................. .7-1
7.3 Replaceable
Parts........................................................7-1
VIII REFERENCE
DATA......................................................8-1
8.1
General.................................................................8-1
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