HP 86601a schematic

TM 11-6425-2837-14&P-6

TM 11-6425-2837-14&P-6

i

Section

0.
I.

1-2.

1-6.

1-8.

1-12.

1-13. 1-2

1-13.

II.

2-1

4-2.
2-5.
2-7.

2-10.
2-12.
2-14.

2-16.
2-18.
2-23.

III.

3-1.

3-4.
3-6.

3-11.

IV.

4-1.
4-3.
4-8.

4-9.
4-10.

4-11.

4-12.

4-13.

4-14.
4-15. 4-6
4-15.

Page

0-1

4-1
4-1

Model 86601A

CONTENTS

Section IV.

1-1
1-1
1-1
1-1
1-1

1-2

2-1
2-1
2-1
2-1
2-1

2-1
2-1
2-1

2-1

2-1

2-1 5-4
3-1

3-1
3-1
3-1
3-1

4-1

4-1

4-1

4-2
4-2

4-3

4-4
4-5

4-7

4-17.

4-18.

4-19.

4-20.
4-21.

4-23.
4-23.

4-24.
4-25.

4-26.

V. 5-1

5-1. 5-1
5-7.
5-10.
5-13.
5-14.

5-15.

5-16.
5-17.

5-18.

VI.

6-1.

6-6.

VII.

7-1.

7-5.

VIII.

8-1.

8-3.
8-10.

8-12.
8-17.

Page

4-9

4-10
4-10

4-11

4-12

4-16

4-16

4-17
4-19

4-20

5-1
5-1

5-1
5-2

5-6
5-9

5-10

6-1
6-1

6-1
7-1

7-1

7-1

8-1

8-1
8-1
8-1
8-1
8-1

ILLUSTRATIONS

Figure

1-1.

1-2.
1-3.

1-4.

1-5.
3-1.

4-1.
ii

Page

1-0
1-1
1-6
1-6
1-6

3-0
4-1

Figure
4-2. Output Accuracy and Level Test Setup

4-3. Output Flatness Test Setup
4-4. Impedance Test Setup
4-5. Harmonic Signal Test Setup
4-6. Spurious Signal Test Setup
4-7. Signal-to-Phase Noise Test Setup.
4-8. Signal-to-AM Noise Ratio Test Setup
4-9. Amplitude Modulation Test Setup

.......

.........

.......

.......

.....

....

.....

...

Page

4-2
4-3
4-4
4-5
4-6
4-8
4-9
4-10

Model 86601A

ILLUSTRATIONS (cont'd)

Figure

4-10. 4-12

4-11.

4-12.

4-13.
4-14.
4-15.
4-16.

5-1.
5-2.

5-3.
5-4.
5-5.

5-6.

7-1. 7-3
7-2. 7-5

7-3.
7-4.
7-5.
7-6.

7-7.

7-8.
8-1.
8-2.
8-3.

Page

4-13

4-15

4-16 8-8.
4-18 8-9.
4-19 8-10.

4-20

5-2

5-3
5-4

5-6

5-9

5-10

7-5
7-7
7-8

7-9 8-23.

7-10
7-11
8-0

8-3

8-4

Figure

8-4.
8-5.

8-6.

8-7.

8-11.
8-12.

8-13.
8-14.
8-15.

8-16.

8-17.
8-18.
8-19.

8-20.

8-21.
8-22.

8-24.

8-25.

8-26.
8-27.
8-28.

Page

8-6

8-7

8-7

8-8

8-10

8-11
8-11

8-11
8-11
8-12
8-13
8-13

8-13
8-13

8-15

8-15
8-15
8-16
8-17

8-17
8-17

8-19

8-19

8-21

8-21

TABLES

Table
1-1.

1-2. Test Equipment and

1-3. 40 dB Amplifier Specifications
4-1. Spurious checks
4-2. Carrier Envelope Distortion Test
4-3. Performance Test Record
5-1. Harmonic Distortion Level Checks
6-1. Part Numbers for

6-2. Reference Designators and

A.

B.
C.
D.

el 86601A Specifications 1-2

Accessories List 1-4

Assembly Exchange Orders

Abbreviations Used in

Parts List 6-2

REFERENCES A-1
COMPONENTS OF END ITEM LIST (NA)
ADDITIONAL AUTHORIZATION LIST (NA)

MAINTENANCE ALLOCATION

Page

1-6
4-7

4-14

4-22

5-5

6-1

APPENDIXES

D-l

Table
6-3. Replaceable Parts 6-3

6-4. Manufacture's Code List 6-15
6-5. Part Number-National Stock

Number Cross Reference Index
7-1. Manual Changes by Serial Number
7-2. Assembly-Change Cross Reference Index
8-1. Schematic Diagram Notes
8-2. Assembly Locations
8-3. 1 dB Attenuation Checks
8-4. Attenuator Driver Levels 8-20

E. REPAIR PARTS AND SPECIAL

TOOLS LISTS

EXPENDABLE SUPPLIES AND

F.

MATERIALS LIST (NA)

Page

6-16

7-1

7-4

8-5

8-7

8-16

E-1

iii

INTRODUCTION

0-1. SCOPE

0-2. INDEXES OF PUBLICATIONS

0-3. MAINTENANCE FORMS, RECORDS,

AND REPORTS

TM 11-6425-2837-14&P-6

SECTION 0

0-4. REPORTING EQUIPMENT

IMPROVEMENT RECOMMENDATIONS
(EIR).

EIR can and must be submitted by anyone who is
aware of an unsatisfactory condition with the equip
ment design or use. It is not necessary to show a new
design or tit a better way to perform a procedure;
just simply tell why the design is unfavorable or why
a procedure is difficult. EIR may be submitted on SF
368 (Quality Deficiency Report). Mail direct to Com­mander, US Army Communications and Electronics

Materiel Readiness Command, ATTN: DRSEL-ME-

MQ, Fort Monmouth, NJ 07703. A reply will be fur-

nished to you.

agement System.

b. Report of Packaging ad Handling Deficiencies.
Fill out and forward DD Form 6 (Packaging Improve­ment Report) as prescribed in AR 700-58/NAVSUP­INST 4030.29/AFR 71-13/MCO P4030.29A, and DLAR

4145.8.

c. Discrepancy in Shipment Report (DISREP) (SF

361). Fill out and forward Discrepancy in

Shipment

0-5. ADMINISTRATIVE STORAGE
Administrative storage of

used by Army activities shall be in accordance with
paragraph 2-16.

0-6. DESTRUCTION OF ARMY ELECTRONICS

MATERIEL

Destruction of Army electronics materiel to prevent
enemy use shall be in accordance with TM 750-244-2.

0-1

Model 86601A

1-0

Figure 1-1. Model 88601A RF Section

Model 86601A

SECTION I

GENERAL INFORMATION

1-1.

1-2.

1-3.

section covers instrument

ations and other basic in-

1-4. Figure 1-1 shows a front view of the HP

1A installed in the HP Model 8660A

mainframe ready for use.

1-5. The various sections of this manual provide

information as follows:

a. SECTION II, INSTALLATION, provides

information relative to incoming inspection, power

requirements, mounting, packing and shipping, etc.

b. SECTION III, OPERATION, provides in-

formation relative to operating the instrument.

c. SECTION IV, PERFORMANCE TESTS,

provides information required to asccitain that the
instrument is performin, in accordance with pub­lished specifications.

d. SECTION V, ADJUSTMENTS, provides
inform&ion required to properly adjust and align
the instrument after repairs are made.

e. SECTION VI REPLACEABLE PARTS
provides ordering information for all parts and
assemblies.

f.

SECTION VII, MANUAL CHANGES,

g.

1-6.

1-7.

Figure 1-2. Instrument Identification

1-8. DESCRIPTION

1-9. The HP Model 86601A RF Section output
plug-in provides a .01 to 109.999999 MHz output
when installed in one of the HP Model 8660
mainframes. The output frequency may be selected
in increments as low as 1 Hz or 100 Hz depending
on the mainframe used.

1-10. The only operator controls on the Model

86601A are the attenuator (OUTPUT RANGE and

VERNIER) controls. These controls provide a

the rf output at any level between

-146 dBm an +13 dBm. In remote operation

these controls are inh

1-11.

for the Model

-1.

1-12.

1-1

Model 86601A

1-13.

1-14.

of the HP 11672A

Separately.

Kit, but may be ord

Table 1-1.

1-15.

1-16.

l 86602A Specifications

1-2

Model 86601A

Table 1-1. Model 86601A Specifications (Cont'd)

1-3

Table 1-2. Test and Equipment and Accessories List

Model 86601A

1-4

Model 86601A

Table 1-2. Test Equipment and Accessories List (cont'd)

1-5

Model 86601A

Figure 1-3.

15 kHz Lowpass Filter

Figure 1-4. 100 kHz Lo

Filter

1-6

Figure 1-5.

Table 1-3.

40 dB Amplifier

40 dB Amplifier Specifications

Model 86601A

SECTION II

INSTALLATION

2-1.

2-2.

2-3.

2-4.

ment for physical damage

ken parts and dents or

amage is found refer to paragraph 2-7
for recommended claim procedure. If the instru­ment appears to be free of damage, perform the

electrical check (see paragraph 2-5). The packaging
material should be retained for possible future use.

2-5. Electrical Check

2-6. The electrical performance check consists of

performing the performance test procedures in

Section IV of this manual. These procedures enable
the operator to determine that the instrument is,
or is not, operating within the specifications listed
in Table 1-1. The initial performance and accuracy
of the instrument are certified as stated on the
inside front cover of this manual. If the instrument
does not operate as specified, refer to paragraph
2-7 for the recommended claim procedure.

2-14.
2-15.

2-16. Storage and Shipment
2-17 If the instrument is to be stored for an

extended period of time it should be enclosed in a
clean sealed enclosure.

2-18. Original Packaging
2-19. The same containers and materials used in

factory packaging can be obtained through any
Hewlett-Packard Sales/Service office l

2-20. If the instrument is being returned to
Hewlett-Packard for service attach a tag indicating
the type of service required, return address, model
number and full serial number Also mark the
container FRAGILE to assure careful handling.

2-21. In any correspondence refer to the instru­ment by model number and full serial number.

2-7.

2-8. If physical damage is found when the instru­ment is unpacked, notify the carrier and the
nearest Hewlett-Packard Sales/Service office
immediately. The HP Sales/Service office will ar­range for repair or replacement without waiting for
a claim to be settled with the carrier.

2-9.

2-10.

2-11.

2-12.

2-13.

2-22. Other Packaging Material

2-23. The following general instructions should be
followed when repackaging with commercially
available materials :

a. Wrap the instrument in heavy paper or
plastic. (If shipping to a Hewlett-Packard Service
office or center, attach a tag indicating the type of
service required, return address, model number and
full serial number.)

2-1

Model 86601A

3-0

Figure 3-1. Front and Rear Panel Controls, Indicators and Connectors

Model 86601A

SECTION III

OPERATION

3-1. INTRODUCTION

3-2.

3-3.

NOTE

If a modulation plug-in section is not used
it will be necessary to have the Model
86631A Auxiliary Section in place in the

modulation plug-in drawer.
3-4. PANEL FEATURES
3-5. Front and rear panel controls, indicators and

connectors of the Model 86601A are shown in
Figure 3-1.

3-6. OPERATING PRINCIPLES
3-7. The Model 86601A may be operated by front

panel controls in the local mode or externally
programmed in the remote mode.

NOTE

The remote mode is selected by the exter-

nal programming device which places a

ground on pin 5 of the blue ribbon con-

nector (J3) on the rear panel of the Model

3-8.

3-9. The front panel attenuator controls are in­hibited when the instrument is operated in the
remote mode.

NOTE

Model 86601A Option 001 instruments
do not include the 150 dB (10 dB steps)
programmable attenuator.

3-10. In Option 001 instrumen
Model 86601A may be adjus
from +13 to 0 dBm by means
control; in the remote mode the output may be
reduced by 9 dB in 1 dB steps.

3-11. OPERATOR’S CHECKS
3-12. During checkout at the factory the Model

86601A RF Section if adjusted for proper opera­tion. No adjustment should be required when the
instrument is received.

3-13. The Operator’s Checks specified in Section

III of the mainframe are adequate for checking the

output frequency of the Model 86601A.

3-14. If

a plug-in Modulation Section is being
used, the checks specified in Section III of the
Modulation Section Manual should also be per­formed.

3-1/3-2

Model 86601A

SECTION IV

PERFORMANCE TESTS

4-1. INTRODUCTION

4-2. This section instructions for perfor­mance testing the Model

86601A RF Section
plug-in. it is assumed in all tests that the Model
86601A is interconnected with a mainframe that is
known to be functioning properly.

4-3. Purpose.
4-4. The performance test procedures are used to

check instrument performance for incoming
inspection and periodic evaluation. The tests are
designed to verify published specifications for the
instrument. Each test applies directly to a listed
specification (see Table l-l).

4-9. FREQUENCY RANGE

4-5.

4-6. Test Equipment
ment required for

R

The test equip-

performance testing is listed in
Table 1-2 and in the individual tests. Test instru­ments other than those listed may be used provid­ing their performance equals or exceeds the specifi­cations listed in Table 1-2.

4-7. Front Panel Checks and Adjustments. Refer
to paragraph 3-11, Operator’s Checks.

4-8. PERFORMANCE TESTS

1.

2.

Figure 4-1. Frequency Range and Accuracy Test Setup

4-1

4-9.

3.

4-10.

4-11.

Model 86601A

PERFORMANCE TESTS

1.

2.

4-2

Figure 4-2. Output Accuracy and Level Test Setup

Model 86601A

PERFORMANCE TESTS

4-11. OUTPUT ACCURACY AND LEVEL (cont'd)

3.

voltmeter indicates the correct level ±1 dB. Disconnect the sampling voltmeter.

4. Set the external attenuator to SO dB and connect it between the Model 86601A OUTPUT and the
Spectrum Analyzer RF INPUT. Set the Model 86601A output level to +10 dBm.

5. Set a convenient reference level on the Spectrum Analyzer with the vertical scale (LOG 2 dB/Div).

6. Change the external attenuator to 70 dB and the Model 86601A OUTPUT RANGE to 0 dBm. The
Spectrum Analyzer display should be within ± 1 dB of the established reference level.

7.

Continue decreasing the attenuation of the external attenuator and the Model 86601A OUTPUT
RANGE in 10 dB steps until the OUTPUT RANGE is set to
set to 0 dB. The spectrum Analyzer display should

remain within ±1 dB for levels down to --70 dBm.

-70 dBm and the external attenuator is

These tests assure the specification of ±2 dB from -67 dBm to -146 dBm.

4-12. OUTPUT FLATNESS
SPECIFICATION: Output flatness: Output level variations with frequency <± 0.5 dBm across the

frequency range.
DESCRIPTION:

1.

2.

This test verifies flatness of the output signal from 10 kHz to 109.9 MHz.

Figure 4-3. Output Flatness Test Setup

4-3

4-12. OUTPUT FLATNESS (con'd)

Model 86601A

PERFORMANCE TESTS

3.

4.

5.

then 100 kHz, and finally 500 kHz. The level read

dB

a Tee

on the High Frequency dB voltmeter.

within a ±0.5 dB window.

6.

7.

a Vector Voltmeter range that will provide a convenient mid-scale reference with the mainframe

cy dB Voltmeter and connect the Vector Voltmeter to the Model 86601A

uency set to 1 MHz.

8.

e mainframe center frequency to 10 MHz, then 50 MHz, and finally 109.9 MHz. The

reference level indicated on the Vector Voltmeter should remain within the ±0.5 dB window.

4-13. IMPEDANCE: 50 OHMS

SPECIFICATION: SWR less than 2:1 on +10 dBm output range; less than 1.3:1 on 0 dBm output range
and below.

DESCRIPTION: The Model 86601A RF OUTPUT is measured with a voltmeter, first with no external
load, then with a 50 ohm external dummy load. The source resistance RS is determined and the SWR is
calculated by dividing RO by RS (or RS by RO if RO is < RS).

1.

4-4

Figure 4-4. Impedance Test Setup

Model 86601A

4-13. IMPEDANCE: 50 OHMS (cont'd)

2.

3. Record the RF output level.

4. Terminate the BNC Tee 50 ohms.

PERFORMANCE TESTS

V

OC

mVrms

5. Record the RF output level.
V

6. The Model 86601A source resistance is found by using the following formula:

Ro V

RS =

V

oc -R

1

O

VOC = 1st measurement (step 3)
V1 = 2nd measurement (step 5)

RO = 50 ohm termination

7. Determine SWR. SWR =

RO or RS. SWR should be < 2.0:1.

R

S

R

O

8. Record SWR

9. Reduce the Model 86601A OUTPUT RANGE to 0 dBm.

10. Repeat steps 2 through 8 at 0 dBm. SWR should be < 1.3:1.

11. Record SWR

4-14. HARMONIC SIGNALS

FICATION:

With the Model 86601A terminated in 50 ohm

0 dB below the selected frequency.

1

mVrms

DESCRIPTION: Th

Model 86601A.

cond and third harmonic

Figure 4-5. Harmonic Signal Test Setup

4-5

4-14.

Model 86601A

PERFORMANCE TESTS

HP 8554L/8552B/140S

1.

2.

1A OUTPUT RANGE to -10 dBm and set the VERNIER control to +3 dBm.

odel 8660A OUTPUT to the Spectrum Analyzer RF INPUT and set the Spectrum

INPUT ATTENUATION to 20 dB.

3.

third harmonics at the following center frequencies: 10 kHz, 400 kHz, 4 MHz, 10

MHz.All harmonic signals should be more than 40 dB below the level of the

SPURIOUS SIGNALS

4-15.
SPECIFICATION: All nonharmonically related spurious signals are at least 80 dB below the selected

output

signal. Power line related spurious signals are at least 70 dB below the carrier.
DESCRIPTION: This test checks for common spurious signals by mixing the signal from the unit under

test with a reference signal offset by 1 kHz. The Wave Analyzer measures common spurious signals
generated in the unit under test.

1.

4-6

Figure 4-6. Spurious Signal Test Setup

Model 86601A

PERFORMANCE TESTS

4-15. SPURIOUS SIGNALS (cont’d)

2. Connect the equipment as shown in Figure 4-6.

3. Set the reference unit center frequency to 50.001 MHz and the output level to +13 dBm.

4. Set the center frequency of the unit under test to 50 MHz and the output level to -87 dBm.

5. Set the Wave Analyze; mode switch to NORMAL and scale value to RELATIVE.

6. Set the wave Analyzer to 1 kHz and adjust levels for a 0 dB reading on the scale.

7. Set the unit under test OUTPUT RANGE and VERNIER to -7 dBm.

8. Set the reference unit and the unit under test as shown in Table 4-1 and note that spurious levels are
lower than -80 dB (0 dB on Wave Analyzer scale).

9. Corrected reading is

-80 dB minus the Wave Analyzer meter reading.

Table 4-1. Spurious Signal Checks

4-16. SIGNAL-TO-PHASE NOISE R

SPECIFICATION: Lower than -50 dB in a 30 kHz
centered on the carrier.

4-7

4-10. SIGNAL-TO-PHASE NOISE RATIO

Model 86601A

Figure 4-7. Signal-to-Phase Noise Test Setup

RECOMMENDED TEST EQUIPMENT:

Oscilloscope HP 180A/1801A/1821A

Double Balanced Mixer HP 10514A
AC Voltmeter HP 403A
40 dB Amplifier (special) see details in Figure 1-5.
Low Pass Filter (special) see details in Figure 1-3.

PROCEDURE:

1.

2.

the equipment as shown in Figure 4-7.

mainframe center frequency to 10.001 MHz. Set the Model 86601A OUTPUT RANGE to -60

d the VERNIER for a meter reading of +3 dBm.

3.

Set the RF Voltmeter Function Switch to 1 CPS-1 MC and record the reading.

4.

Set the mainframe center frequency to 10.000100 MHz and the OUTPUT RANGE to -10 dBm.

5.

Adjust the oscilloscope for an ei

6.

7.

8.

dB

9.

10.

4-8

Model 86601A

PERFORMANCE TESTS

4-17. SIGNAL-TO

OISE RATIO

SPECIFICATION: Lower than -70 dB in a 30 kHz hand centered on the carrier excluding a 1 Hz
bandwidth centered on the carrier.

DESCRIPTION: This test checks AM noise across the Model 86601A frequency range. The AC voltmeter
specified excludes 1 Hz.

Figure 4-8. Signal-to-AM Noise Ratio Test Setup

RECOMMENDED TEST EQUIPMENT

Oscilloscope
Double Balanced Mixer HP10514A
AC Voltmeter
40 dB Amplifier (special); see details in
Low Pass Filter (special); see details in

PROCEDURE:

1.

Connect the equipment

2.

3.

4.

5.

6.

7.

HP 180A/1801A/1821A

HP 403A

4-9

PERFORMANCE TESTS

4-17. SIGNAL-TO-AM NOISE RATION (cont'd)

Model 86601A

8.

MHz at a time that will cause the oscilloscope

T.

9.

10.

11.

on the AC Voltmeter. Noise =

lower than the reference established in step 4. Example: Meter reading is 3 dB

be

should be lower than -70 dB.

oscope baseline trace is stopped at the top graticule line ±1/10 div.

-70 dB ± the difference in meter readings. The

Record Noise Level

4-18. RESIDUAL FM

SPECIFICATION: <1 Hz rms in 2 kHz bandwidth centered on the carrier.
DESCRIPTION: Residual FM is checked indirectly in the checks for signal-to-phase noise across the Model

86601A frequency range.

4-19. AMPLITUDE MODULATION

SPECIFICATION: 0 to 95% on all output ranges (with Model 86632A or 86631A Modulation Section in
place).

DESCRIPTION: This test checks AM frequency response with the mainframe center frequency set to 50
MHz, 3 MHz, and 300 kHz. AM rate is provided from a test oscillator and measured on a Spectrum

Analyzer and Oscilloscope.

dB

4-10

Figure 4-9. Amplitude Modulation Test Setup

Model 86601A

PERFORMANCE TESTS

4-19. AMPLITUDE MODULATION (cont’d)
RECOMMENDED TEST EQUIPMENT:

Spectrum Analyzer
High Frequency dB Voltmeter
Oscilloscope
Test Oscillator
BNC Tee

HP 8553B/8552B/140S

HP 400 GL

HP 180A/1801A/1821A

HP 651B

UG 274 B/U

PROCEDURE:

1.

Connect the equipment as shown in Figure 4-9.
Set the Spectrum Analyzer as follows: INPUT ATTENUATION 30 dB, BANDWIDTH 1 kHz, SCAN

2.
WIDTH 10 kHZ, CENTER FREQUENCY 50 MHz, LOG-LINEAR 2 dB/Div, SCAN TIME 20 mSec/Div
and VIDEO FILTER to OFF,

3.

Set the mainframe center frequency to 50 MHz and the Model 86601A output level to +3 dBm.

4.

Set the Model 86631A AM switch to ON (if the Model 86632A is being used, set the MODE switch to
AM and the SOURCE switch to EXTERNAL AC and AM to 50%).

5.

Set the Test Oscillator output to 10 kHz at .5 Vrms as read on AC Voltmeter.

6.

Adjust the spectrum analyzer until the carrier is at the top graticule line. Amplitude Modulation should
be 50% ±5% with sidebands down -12 dB ±0.5 dB.

7.

Adjust the Test Oscillator frequency from 10 Hz to 50 kHz. The AM % should be flat ± 4 db from 10
Hz to 20 kHz and down 3 dB at about 50 kHz.

8.

Set the mainframe center frequency to 3 MHz and
Oscillator frequency from 10 Hz to 10 kHz. The side

r scan
ould b

th to 2 kHz. Adjust the

t ±.2 dB to 2 kHz; down

at about 5 kHz; down 8 dB at about 10 kHz.
Set the mainframe center

9.

frequency

to 300 kHz. Disconnect the rf OUTPUT from the Spectrum

Analyzer and connect it to the Oscilloscope.

10.

4-20.

4-11

4-20.

Figure 4-10. Amplitude Modulation ON/OFF Ratio Test Setup

ENDED TEST EQUIPMENT:

Broadband Sampling Voltmeter
Power Supply

Model 86601A

PERFORMANCE TESTS

HP 8406A

HP 721A

PROCEDURE:

1.

Connect the equipment as shown in Figure 4-10 (with the Model 86631A AM switch off).

2.

Set the power supply to +4 Vdc.

3.

Set the mainframe center frequency to 50 MHz and output level of the Model 86601A to +13 dBm.
Set a reference point on the Voltmeter.

4.

Switch the Model 86631A AM switch to ON.

5.

The Model 86601A output level should drop to <-12 dBm. (25 dB ON/OFF ratio).

4-21.

SPECIFICATION: Envelope distortion should be less than 1% at 30% AM. Less than 3% at 70% AM. Less
than 5% at 90% AM.

DESCRIPTION:

Amplitude Modulation distortion is checked at 30%, 70% and 90%.

4-12

Model 86601A

PERFORMANCE TESTS

4-21. AMPLITUDE

ODULATION CARRIER ENVELOPE DISTORTION (cont’d)

Figure 4-11. Amplitude Modulation Carrier Envelope Distortion Test Setup

RECOMMENDED TEST EQUIPMENT’:

Double Balanced Mixer
Spectrum Analyzer
Synthesized Signal Generator HP 8660A/B/866C1A/86631A
Variable Phase Generator
Oscilloscope HP 180A/1801A/1821A

Low Pass Filter 100 kHz (special); see details in Fi

HP 10514A

HP 8553B/8552B/140S

PROCEDURE:

1.

Connect the equipment as shown in Figure 4-11.

2. Connect the rear panel R
INPUT of the unit under

3.

e center

RENCE OUTPUT from

et the REFEREN

frequency

NGE to --20 dBm

4.

5.

6.

7.

of time unit

the VE

nit

of

the r

unit

NCE
.

4-13

Model 86601A

PERFORMANCE TESTS

4-21.

8.

9.

10.

11.

12.

=.73 = -41.5 dB

13. Adjust the Variable Phase Generator until the 10 kHz fundamental is 3 dB below the reference (top
graticule line) (70% AM). Using the 10 kHz fundamental as a reference, measure the second,-third and
fourth harmonica and use Table 4-2 as in step 10. Total harmonics should be > 30 dB below the 70%
reference level (3%).

Table 4-2. Carrier Envelope Distortion Test

4-14

Model 86601A

PERFORMANCE TESTS

4-21.

14.

4-22. INCIDENTAL PHASE MODULATION

SPECIFICATION: Less than 0.2 radians peak at 30% AM.
DESCRIPTION: This test checks the AM to PM ratio. AM is set to 30% Modulation with an external Test

Oscillator. The ratio is measured with a Wave Analyzer.

Figure 4-12. Incidental PM Test Setup

RECOMMENDED TEST EQUIPMENT:

Synthesized Signal Generator HP 8660A/B/86601A/86631A
Oscilloscope

Test Oscillator HP 651B
Wave Analyzer HP 302A
Double Balanced Mixer HP 10514A
15 kHz Low Pass Filter (special); see details in Figure 1-3.
Variable Phase Generator

PROCEDURE:

1. Connect the equipment as shown in F

2.

3.

4.

5.

6.

HP 180A/1801A/1821A

HP 203A

4-15