HP 86601a schematic

T M 1 1 - 6 4 2 5 - 2 8 3 7 - 1 4 & P - 6

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

i

			Model	86601A
	Section	C O N T E N T S
		P a g e	Section IV.		Page
	0.	0 - 1
					4-9
	I.	1-1	4-17.
	1-2.	1-1	4-18.		4-10
	1-6.	1 - 1	4-19.		4 - 1 0
	1-8.	1-1	4-20.		4-11
	1-12.	1-1	4-21.		4-12
	1-13.	1-2
	1-13.	1 - 2	4-23.		4-16
			4-23.		4-16
			4-24.		4-17
	I I .	2-1	4-25.		4-19
	2 - 1	2-1	4-26.		4-20
	4-2.	2-1	V .		5 - 1
	2-5.	2-1
	2 - 7 .	2-1	5-1.		5 - 1
	2-10.	2-1	5-7.		5 - 1
	2-12.	2-1	5-10.		5-1
	2-14.	2-1	5-13.		5-1
	2-16.	2-1	5-14.		5 - 2
	2-18.	2-1	5-15.
	2-23.	2-1	5-16.		5 - 4
	III.	3-1			5 - 6
			5-17.		5 - 9
	3-1.	3-1	5-18.
	3-4.	3-1			5-10
	3-6.	3-1
	3-11.	3-1	VI .		6-1
	IV.	4 - 1	6 - 1 .		6-1
			6-6.		6-1
	4 - 1 .	4 - 1
	4 - 3 .	4 - 1	VII.		7-1
	4-8.	4-1	7 - 1 .		7-1
	4-9.	4-1	7-5.		7 - 1
	4-10.	4-2
	4-11.	4-2	VIII.		8 - 1
	4-12.	4-3	8-1.		8 - 1
	4-13.	4-4	8-3.		8-1
	4-14.	4-5	8-10.		8-1
	4-15.	4-6	8-12.		8-1
	4-15.	4-7	8-17.		8-1
		ILLUSTRATIONS
	Figure	Page	Figure		Page
	1-1.
		1-0	4-2. Output Accuracy and Level Test Setup .	. .	4-2
	1-2.
		1-1	4-3. Output Flatness Test Setup . . . . .	. .	4-3
	1-3.	1-6	4-4. Impedance Test Setup . . . . . . .	. .	4-4
	1-4.	1-6	4-5. Harmonic Signal Test Setup . . . . .	. .	4-5
	1-5.
		1-6	4-6. Spurious Signal Test Setup . . . . .	. .	4-6
	3-1.	3-0	4-7. Signal-to-Phase Noise Test Setup. . . .	. .	4-8
	4-1.		4-8. Signal-to-AM Noise Ratio Test Setup . .	. .	4-9
		4-1	4-9. Amplitude Modulation Test Setup . . .	. .	4-10

ii

Model 86601A
				ILLUSTRATIONS (cont'd)
Figure				P a g e	F i g u r e			Page
4 - 1 0 .				4 - 1 2	8 - 4 .			8-6
4 - 1 1 .					8 - 5 .			8 - 7
				4-13	8 - 6 .			8 - 7
4 - 1 2 .				4 - 1 5 8-7.				8 - 8
4 - 1 3 .				4-16 8-8.				8-10
4 - 1 4 .				4 - 1 8 8-9.				8 - 1 1
4 - 1 5 .				4-19	8-10.			8-11
4 - 1 6 .				4-20	8-11.			8-11
5 - 1 .				5 - 2	8-12.			8-11
5 - 2 .				5 - 3	8-13.			8 - 1 2
5 - 3 .				5 - 4	8-14.			8-13
5 - 4 .				5 - 6	8-15.			8 - 1 3
5 - 5 .				5 - 9	8-16.			8-13
					8-17.			8-13
5 - 6 .				5-10	8-18.			8 - 1 5
7 - 1 .				7 - 3	8-19.			8-15
7 - 2 .				7 - 5
7 - 3 .				7-5	8-20.			8 - 1 5
7 - 4 .				7 - 7	8-21.			8 - 1 6
7 - 5 .				7 - 8	8-22.			8-17
7 - 6 .				7-9	8-23.			8-17
7 - 7 .				7-10 8-24.				8 - 1 7
7 - 8 .				7-11
8 - 1 .				8 - 0	8-25.			8-19
8 - 2 .				8-3	8-26.			8-19
8 - 3 .					8-27.			8-21
				8 - 4	8-28.			8-21
				TABLES
Table				Page	Table			Page
1-1.	el 86601A Specifications			1-2	6 - 3 .	R e p l a c e a b l e	P a r t s	6 - 3
1-2. Test Equipment and					6 - 4 . Manufacture's Code List			6 - 1 5
	Accessories	List		1 - 4	6 - 5 . P a r t N u m b e r - N a t i o n a l S t o c k
1-3. 40 dB Amplifier Specifications				1-6		N u m b e r C r o s s R e f e r e n c e I n d e x 6-16
4-1. Spurious checks				4-7	7-1. Manual Changes by Serial Number			7-1
4-2.	Carrier Envelope	Distortion	Test	4-14	7-2. Assembly-Change Cross Reference Index			7-4
4-3. Performance Test Record				4-22	8-1. Schematic Diagram Notes			8-5
5-1.	Harmonic Distortion Level		Checks	5-5	8-2. Assembly Locations			8-7
6-1. Part Numbers for					8-3. 1 dB Attenuation Checks			8-16
	Assembly Exchange Orders			6-1	8-4.	Attenuator Driver	Levels	8-20
6 - 2 . R e f e r e n c e D e s i g n a t o r s a n d
	A b b r e v i a t i o n s U s e d i n
	P a r t s L i s t			6 - 2

APPENDIXES

A . B. C . D.

REFERENCES	A - 1
COMPONENTS OF END ITEM LIST (NA)
ADDITIONAL AUTHORIZATION LIST (NA)
MAINTENANCE ALLOCATION	D - l

E. REPAIR PARTS AND SPECIAL

TOOLS LISTS E-1 F . EXPENDABLE SUPPLIES AND

MATERIALS LIST (NA)

i i i

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

S E C T I O N 0

I N T R O D U C T I O N

0 - 1 . S C O P E

0-2. INDEXES OF PUBLICATIONS

0-3. MAINTENANCE FORMS, RECORDS,

AND REPORTS

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/NAVSUP- INST 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

0-4. REPORTING EQUIPMENT IMPROVEMENT RECOMMENDATIONS

( E I R ) .

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 furnished to you.

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

Figure 1-1. Model 88601A RF Section

1 - 0

Model 86601A

S E C T I O N I

G E N E R A L I N F O R M A T I O N

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 information 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,

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

g .
1-11.	f o r t h e M o d e l

-1.

1 - 6 .

1 - 1 2 .

1 - 7 .

1 - 1

Model 86601A

1-13.		1 - 1 5 .
		1 - 1 6 .
1 - 1 4 .
of the HP 11672A	Kit, but may be ord
Separately.
	Table 1-1.	l 86602A Specifications

1 - 2

Model 86601A

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

1 - 3

Model 86601A

Table 1-2. Test and Equipment and Accessories List

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

Figure 1-5. 40 dB Amplifier

Table 1-3. 40 dB Amplifier Specifications

1 - 6

Model 86601A

S E C T I O N I I

I N S T A L L A T I O N

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 instru-

ment 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 - 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 - 1 0 .

2-11.

2 - 1 4 .

2 - 1 5 .

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.

2-22. 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 2 .

2-13.

2 - 1

Model 86601A

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

3 - 0

Model 86601A

	S E C T I O N I I I
	O P E R A T I O N
3-1. INTRODUCTION	3-8.
3 - 2 .
3 - 3 .	3-9. The front panel attenuator controls are in-

hibited when the instrument is operated in the remote mode.

NOTE

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 external programming device which places a ground on pin 5 of the blue ribbon connector (J3) on the rear panel of the Model

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

S E C T I O N I V

P E R F O R M A N C E T E S T S

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 - 5 .

4-6. Test Equipment R The test equipment required for 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

4-9. FREQUENCY RANGE

Figure 4-1. Frequency Range and Accuracy Test Setup

1 .

2 .

4 - 1

Model 86601A

PERFORMANCE TESTS

4 - 9 .

3 .

4 - 1 0 .

4 - 1 1 .

Figure 4-2. Output Accuracy and Level Test Setup

1 .

2 .

4 - 2

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 -70 dBm and the external attenuator is set to 0 dB. The spectrum Analyzer display should remain within ±1 dB for levels down to --70 dBm. 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: This test verifies flatness of the output signal from 10 kHz to 109.9 MHz.

Figure 4-3. Output Flatness Test Setup

1 .

2 .

4 - 3

Model 86601A

PERFORMANCE TESTS

4-12. OUTPUT FLATNESS (con'd)

3 .

4.

5.

dB a Tee

on the High Frequency dB voltmeter.

then 100 kHz, and finally 500 kHz. The level read within a ±0.5 dB window.

6 .	c y dB Voltmeter and connect the Vector Voltmeter to the Model 86601A

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

Figure 4-4. Impedance Test Setup

1 .

4 - 4

or R S . SWR should be < 2 . 0:1 .

Model 86601A

PERFORMANCE TESTS

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

2.

3.Record the RF output level.

VOC

4.Terminate the BNC Tee 50 ohms.

5.Record the RF output level.

V 1

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

RS = R o V o c - R O

V 1

VOC = 1st measurement (step 3)

V1 = 2nd measurement (step 5)

RO = 50 ohm termination

7. Determine SWR. SWR = R O

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.

DESCRIPTION: Th cond and third harmonic Model 86601A.

Figure 4-5. Harmonic Signal Test Setup

mVrms

mVrms

4 - 5

			Model 86601A
	PERFORMANCE	TESTS
4 - 1 4 .
		HP	8554L/8552B/140S
1.	1A OUTPUT RANGE to -10 dBm and set the VERNIER control to +3 dBm.
2 .	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

4-15. SPURIOUS SIGNALS

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.

Figure 4-6. Spurious Signal Test Setup

1 .

4 - 6

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

Model 86601A

4-10. SIGNAL-TO-PHASE NOISE RATIO

	Figure 4-7. Signal-to-Phase Noise Test Setup
RECOMMENDED TEST EQUIPMENT:
Oscilloscope	HP	180A/1801A/1821A
Double Balanced	Mixer	HP 10514A
AC Voltmeter		H P 4 0 3 A

40 dB Amplifier (special) see details in Figure 1-5. Low Pass Filter (special) see details in Figure 1-3.

PROCEDURE:

1. the equipment as shown in Figure 4-7.

2.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.

dB

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 .

9 .

1 0 .

4 - 8

Model 86601A

PERFORMANCE TESTS

4-17. SIGNAL-TOOISE 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	HP	180A/1801A/1821A
Double Balanced Mixer		HP10514A
AC Voltmeter		HP 403A

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.

4 - 9

Model 86601A

PERFORMANCE TESTS

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

8.

9.

1 0 .

1 1 .

MHz at a time that will cause the oscilloscope

T.

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

on the AC Voltmeter. Noise = -70 dB ± the difference in meter readings. The be lower than the reference established in step 4. Example: Meter reading is 3 dB

should be lower than -70 dB.

Record Noise Level

dB

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.

Figure 4-9. Amplitude Modulation Test Setup

4 - 1 0

Model 86601A
PERFORMANCE	TESTS
4-19. AMPLITUDE MODULATION (cont’d)
RECOMMENDED TEST EQUIPMENT:
Spectrum Analyzer	HP	8553B/8552B/140S
High Frequency dB Voltmeter		HP 400 GL
Oscilloscope	HP	180A/1801A/1821A
Test Oscillator		HP 651B
BNC Tee		UG 274 B/U

PROCEDURE:

1.Connect the equipment as shown in Figure 4-9.

2.Set the Spectrum Analyzer as follows: INPUT ATTENUATION 30 dB, BANDWIDTH 1 kHz, SCAN 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	r scan	th to 2 kHz. Adjust the
Oscillator frequency	from 10 Hz to 10 kHz. The side	ould b	t ±.2 dB to 2 kHz; down

at about 5 kHz; down 8 dB at about 10 kHz.

9. Set the mainframe center frequency to 300 kHz. Disconnect the rf OUTPUT from the Spectrum Analyzer and connect it to the Oscilloscope.

1 0 .

4 - 2 0 .

4 - 1 1

Model 86601A

PERFORMANCE TESTS

4 - 2 0 .

Figure 4-10. Amplitude Modulation ON/OFF Ratio Test Setup
ENDED TEST EQUIPMENT:
Broadband Sampling Voltmeter	HP 8406A
Power Supply	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 - 2 1 .

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	HP 10514A
Spectrum Analyzer	HP 8553B/8552B/140S
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

PROCEDURE:

1.Connect the equipment as shown in Figure 4-11.

2. Connect the rear panel R	RENCE OUTPUT from	nit	the r	NCE
INPUT of the unit under	et the REFEREN	o f	unit	.

3.

4.

5 .

6.

7.

e center frequency of time unit NGE to --20 dBm the VE

4 - 1 3

Model 86601A

PERFORMANCE TESTS

4-21.

8 .

9 .

1 0 .

1 1 .

1 2 .

=.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 - 1 4

Model 86601A

PERFORMANCE TESTS

4 - 2 1 .

1 4 .

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				HP 180A/1801A/1821A
Test	Oscillator			HP 651B
Wave	Analyzer			H P 3 0 2 A
Double Balanced		Mixer		HP 10514A
15 kHz Low Pass Filter (special); see details in Figure 1-3.				HP 203A
Variable Phase		Generator

PROCEDURE:

1. Connect the equipment as shown in F

2 .

3 .

4 .

5.

6.

4 - 1 5