Geräte Informationen:

Hewlett Packard 415C Level Meter
Hersteller:
Hewlett Packard
Modell: 415C
Datum: 1962
Kategorie: Messgeräte
Gruppe: Level Meter
Beschreibung: Standing Wave Ratio Meter
Informationen:
                                    1-2. The Model 415C Standing Wave Ratio Meter is a
transistorized instrument designed for measuring standing
wave ratios and attenuation. The instrument is essentially a
high-gain amplifier, tuned to an audio frequency, with a
calibrated meter output. Specifications for this instrument
are given in table 1-1. The Model 415C is calibrated to
accept inputs from square-law detectors, but because of the
high sensitivity and tuned amplifier it is also, useful as a
null detector for audio frequency bridges.

1-3. Normally the signal input to the Model 415C is taken
from either crystal (200-ohm or 200K-ohm) or bolometer (4.3
ma or 8.7 ma) detectors. Bolometer bias is adjustable by
±10% and circuit protection prevents damage to a
barretter-type bolometer if connected or disconnected while
bias current is being supplied. SWR and attenuation are
measured with high accuracy and resolution by expanding
selected segments of the normal scales to a full scale
presentation. SWR may also be measured accurately in terms
of db and then converted to a swr.

1-4. This instrument is capable of portable operation when
equipped with a battery. A battery for this use is available
initially as Option 1 and later as a$ stock item. The Model
415C has a variable tuned amplifier and an adjustable
bandwidth (15 cps to 100 cps) to meet a variety of
measurement conditions. An ac Amplifier Output is provided
on the rear panel for using the Model 415C as a high-gain
(140 db) tuned amplifier. A Recorder jack on the rear panel
permits operation with a dc recorder.

Folgende Anleitungen sind für obiges Gerät verfügbar:

Hewlett Packard -- 415C -- Serviceanleitung
Dateiname: HewlettPackard-6995-Manual-Page-1-Picture
Dokumenttyp: Serviceanleitung
Seitenanzahl: 66
Dateigröße: 13.20 Mbytes (13836768 Bytes)
Sprache: Englisch
Revision:
Dokument-ID/Nummer: 01267-2
Datum: Juni 1962
Qualität: Gescanntes Dokument, alles ist lesbar.
Upload Datum:
MD5: 045667fc6254505e92b377b4477323a1
ed2kID: 1c1bdb3343032d4ee6bd648ba8240ef2
Downloads: 50 seit 07 August 2015
Hochgeladen von: Gianni Guidotti
Informationen:
Serial prefixed 218

Section	Page

I	GENERAL INFORMATION........1-1

1-1.	Description and Purpose . « . . . . 1-1

1-5. Models Covered..........1-1

1-7.	Differences Between Instruments • *1-1

1-9. Equipment Available........1-1

1-11.	Three-Conductor Power Cable • • -1-1
II	PREPARATION FOR USE.........2-1

2-1. Initial Inspection.........2-1

2-3. Incoming Quality Control Check . . .2-1

2-5. Rack/Bench Instructions.....<=2-1

2-.7. AC Power Source «...... . . 2-1

2-9. Installing Battery and Input

Connector . . .........2-1

2-11. Temperature Limits	2-1

2-13. Repackaging for Shipment * . o . . 2-1
III	OPERATING INSTRUCTIONS.......3-1

3-1. Introduction . . .........3-1

3-3. Front and Rear Panel Fixtures • * «3-1 3-5. General
Operating and

Measurement Considerations . . .3-2

3-6.	Battery Operation.......3-2

3-12. Groundloop Currents......3-2

3-14. Bandwidth and Frequency

Selection ...... . . ° . 3-2

3-16. SWR Measuring Equipment and

Techniques..........? 3-2

3-17. Equipment Setup and

Characteristics ....... 3-2

3-19. Detector Probe Penetration • 6 « 3-3 3-22. Use of
Crystal Detectors • • • -3-3 3-24. Checking Square-Law

Response.........« 3-3
3-27.	Locating Maximum or

Minimum..........3-3

3-29.	Errors from Signal Source * • •	3-4

3-34.	SWR Measurement Procedure . • •	3-4

3-35. General........... <>	3-4

3-37.	Low SWR (1:1 to 10:1) . . . . .	3-6

3-39.	High SWR (Above 10:1) . ....	3-7
3-46. Attenuation Measurement

Procedure...... . » . . • 3-8

3-48. Load Impedance Measurement . . . 3-8

3	- 49 • General ....... o.o. .3 — 8

3-51. Impedance Measurement

Procedure.......... 3-9

3-53. Smith Chart Explanation . . . .3-10

3-55. Smith Chart Calculations . . . .3-10

3-59. Special Applications........3-10

3-61. Recorder...........3-10

3-63. Amplifier Output........3-12
Section	Page

IV	PRINCIPLES OF OPERATION ....... 4-1

4-1. General.............4-1

4-3. Input Circuits...............4-1

4-5. Range Attenuator......„..4-1

4-7. Input Amplifier..........4-2

4-9. Tuned Amplifier..........4-2

4-12. Expand Circuit...............4-2

4-14. Meter Amplifiers...... ... 4-2

4-16. Meter Circuit................4-2

4-18. Output Circuits . ........ . 4-2

4-20.	Power Supply...........4-2

V	MAINTENANCE .............5-1

5-1.	Introduction ............ 5-1

5-3.	Test Equipment Required ..... 5-1

5-5.	Isolating Attenuator.......5-2

5-7.	Accuracy of Equipment.....5-2

5-9. Instrument Cover Removal.....5-2

5-11.	Maintenance of Options 1 and 2 . . .5-2

5-13. Troubleshooting..........5-4

5-14. General............5-4

5-16. Circuit Voltage Checks.....5-4

5-18. Noise Level..........5-4

5-20. Power Supply......... 5-4

5-23.	Bolometer Bias Circuitry .... 5-5

5-25. Expand Circuit.........5-5

5-27. Meter Circuit.........5-5

5-29.	Gain Controls ......... 5-5

5-31. Switch Components.......5-5

5-33. Amplifier Gain.........5-7

5-35. Battery Circuit........5-7

5-41.	Troubleshooting Summary . . . .5-8

5-43. Repair and Replacement......5-8 .
5-45.	Servicing Etched Circuit Boards . 5-8

5-47.	Specialized Component

Replacement ........5-9

5-49. Diode Markings........5-9

5-51.	Switch Repair or Replacement . . 5-9

5-56.	Check Following Replacement . .5-10

5-58.	Tuned Amplifier Modification . . .5-10

5-61.	Calibration and Adjustment .... 5-11

5-62. General............5-11

5-64.	Meter Pointer Adjustment . . . .5-11
5-66. Power Supply Adjust...... 5-11

5-68.	Bolo Bias Meter Adjust . . . . .5-13

5-70.	Center Frequency Adjust . . . .5-13

5-72. Bandwidth Adjust .......5-13

5-74. Sensitivity Adjust.......5-14

5-76.	Expand Scale Calibration . . . .5-14

5-78. Expand-Normal Adjust.....5-14

5-80. Performance Verification.....5-15

5-81. General............5-15

5-83. Sensitivity...........5-15

5-85. Noise............. 5-15

5-87. Frequency...........5-15

5-89. Bandwidth . ..........5-16

5-91.	Tracking Accuracy 
HewlettPackard-6995-Manual-Page-1-Picture
Kostenlos herunterladen


Kommentare

Noch keine Kommentare vorhanden.

Kommentar Hinzufügen

* Pflichtfeld
(wird nicht veröffentlicht)
 
Bold Italic Underline Strike Superscript Subscript Quote Line Bullet Link Email Image Video
 
Smile Sad Huh Laugh Mad Tongue Crying Grin Wink Scared Cool Sleep Blush Unsure Shocked
 
1000
Is ice cream hot or cold?
 
Die Antwort lautet:
 
Informiere mich via E-Mail über neue Kommentare.
 
Meine Daten auf diesem Computer.
 
 
Powered by Commentics