Equipment information:

EIP Incorporated 371 Frequency counter
Manufacturer:
EIP Incorporated
Model: 371
Date: 1977
Category: Measurement instruments
Group: Frequency counter
Description: Source Locking Autohet Microwave Counter
Information:
                                    The EIP 371 Source Locking Autohet Microwave Counter
automatically measures the frequency of any CW signal
within the range of 20 Hz to 18.0 GHz. This frequency
range is covered in three bands: 20 Hz to 300 MHz. 100 MHz
to 850 MHz. and 825 MHz to 18 GHz.
Measurements in Band I (20 Hz to 300 MHz) are made with
a 300 MHz direct electronic counter. Band II (100 MHz to
850 MHz) uses a prescaler to divide the input signal by
a factor of four into the frequency range of the 30D MHz
direct counter. Band III (850 MHz to 18.0 GHz) measurements
are made by heterodyning the input frequency with an
automatically selected harmonic of an internal 200 MHz
comb generator, producing a difference frequency which
falls within the range of the 300 MHz direct counfer.
The inaccuracy of the indicated reading by the counter,
is directly related to the quality of the time base
oscillator over the entire operating range of the counter

These manuals are available for the above equipment:

EIP Incorporated -- 371 -- Service and User Manual
File name: EIP-4312-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 54
Size: 2.08 Mbytes (2183075 Bytes)
Language: english
Revision:
Manual-ID/Number: 5580012
Date: July 1977
Quality: Scanned document, reading partly badly, partly not readable.
Upload date:
MD5: 32bd3367fdeadb491eed3c326c1e6924
ed2kID: fa6ebdf0a916a3e93e163c0e373c9846
Downloads: 157 since 30 March 2013
Information:
SECTION 1 - GENERAL INFORMATION & SPECIFICATIONS

1-1	Description........................................................................1-1

1-8	Instrument Identification.....................................1-1

1-10	Specifications......................................................................1-1

SECTION 2 - INSTALLATION

2-1	Unpacking..........................................................................2-1

2-4	Installation........................................................................2-1

2-6	Incoming Operational Check........................................................2-1

SECTION 3 - OPERATION

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

3-3	Controls, Indicators and Connectors................................................3-1

3-5	Numerical Display Brightness Adjustment............................................3-1

3-7	Counter Operation...........................................3-1

3-8	Lockbox Operation..................................................................3-1

3-9	Preset Operation................... . . .........3-1

SECTION 4 - THEORY OF OPERATION

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

4-8	300 MHz Direct Counter............................................................4-1

4-20	Autohet Converter..................................................................4-3

4-30	Lockbox Operation. ............. ........ •_..........**.-3

V 7	An Introduction to YIG Filters . . V . '.	4-5

SECTION 5 -- MAINTENANCE £ SERVICE	..... 4 r	- :

5-1	•••• General . 1 .v . .	. . . . . ....... . .......... . .	5-1

5-3	Fuse Replacement......................................5-1

5-5’ ''"Air Circulation	: "/'r'.' : .’ . . .	‘'............5-1

5-7	Counter Servicing..................................................................5-1

5-8	Recommended Service Procedures..................................5-1

5-9	Servicing Precautions . ........................... . ■	5-1

5-10	Factory Service......................................................................5-1

5-12	TROUBLESHOOTING................................................................5-3

5-13	Malfunction at Turn On............................................................5-3

5-15	Failure to Indicate All Zeros........................................................5-3

5-17	Malfunction in Self Test............................................................5-3

5-19	Malfunction in Band IB (10 MHz - 300 MHz)........................................5-3

5-21	Malfunction in Band IA (20 Hz - 135 MHz) . . .....................................5-4

5-23	Malfunction in Band II (100 MHz - 850 MHz)........................................5-4

5-25	Malfunction in Band III (825 MHz - 18 GHz)........................................5-4

5-27	Lockbox Malfunction
6-1	General.................................................................6-1

6-3	Power Supply Adjustment..........................................................6-1

6-5	Band I Adjustment (20 Hz - 300 MHz) .............................................6-1

6-6	Band II Adjustment (100 MHz - 850 MHz)............................................6-1

6-7	Band III Adjustment (825 MHz - 18 GHz)............................................6-1

6-8	Time Base Calibration.......................... .	6-5

6-10	TCXO Calibration..........................................6-5

6-15	TCXO Calibration Procedure..........................................6-6

6-16	Method 1........................................................................6-6

6-17	Method 2........................................................................6-6

6-18	Oven Stabilized Oscillator Calibration................................................6-6

6-22	Oven Stabilized Oscillator Test Procedure..........................................6-6

6-23	Test Equipment Required..........................................................6-6

6-26	To Measure Oscillator Frequency....................................................6-7

6-27	Lockbox Adjustments..............................................................6-7

SECTION 7 - PERFORMANCE TESTS

7-1	General............................................................................7-1

7-3	Variable Line Voltage..............................................................7-1

7-5	Recommended Test Equipment......................................................7-1

7-7	PERFORMANCE TESTS..............................................................7-1

7-8	Range and Sensitivity - Band IA (20 Hz - 135 MHz)................................7-1

t 7-9	Range and Sensitivity - Band IB (10 MHz - 300 MHz)................................7-1

7-10	Range and Sensitivity - Band II (100 MHz - 850 MHz)..............................7-1

7-11	Range and Sensitivity - Band III (825 MHz - 18 GHz)................................7-1

7-12	YIG Preset - Band 111..............................................................7-2

7-13	Frequency Programming............................................................7-2

7-14	Lock-Up Range - Band I............................................................7-2

7-15	Lock-Up Range - Band II..........................................................7-2

7-16	Lock-Up Range - Band III..........................................................7-2

7-17	Time Base Aging Rate..............................................................7-2

SECTION 8 - PARTS LISTS

8-1	General............................................................................8-1

8-3	List of Tables......................................................................8-1

8-4	To Order Replacement Parts........................................................8-1

SECTION 9 - CIRCUIT SCHEMATICS & DESCRIPTIONS - COMPONENT LOCATORS

9-1	General.....................................................................9-1

SECTION 0 - OPTIONS

Refer to individual Option pages for contents
EIP-4312-Manual-Page-1-Picture
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