Page 1
HP 8561E and 8563E Spectrum Analyzers
Service Guide Supplement
Using Performance Tests When an
HP 3335A Source Is Not Available
Manufacturing Part Number: 08563-srvsup
Printed in USA
October 1999
© Copyright 1999 Hewlett-Packard Company
Page 2
Notice
The information contained in this document is subject to change without notice.
Hewlett-Packard makes no warranty of any kind with regard to this material, including
but not limited to, the implied warranties of merchantability and fitness for a particular
purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or
consequential damages in connection with the furnishing, performance, or use of this
material.
Assistance
For any assistance, contact your nearest Hewlett-Packard Sales and Service Office.
General Safety Considerations
WARNING Before this instrument is switched on, make sure it has been properly
grounded through the protective conductor of the ac power cable to
a socket outlet provided with protective earth contact.
Any interruption of the protective (grounding) conductor, inside or
outside the instrument, or disconnection of the protective earth
terminal can result in personal injury.
WARNING There are many points in the instrument which can, if contacted,
cause personal injury. Be extremely careful.
Any adjustments or service procedures that require operation of the
instrument with protective covers removed should be performed
only by trained service personnel.
CAUTION Before this instrument is switched on, make sure its primary power circuitry
has been adapted to the voltage of the ac power source.
Failure to set the ac power input to the correct voltage could cause damage to
the instrument when the ac power cable is plugged in.
ii
Page 3
Contents
1. Using this Adjustment Procedure Supplement
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Implementation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
2. Adjustment Procedures
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
Using the TAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-11
2a. Manual Adjustment Procedures: HP 3335A Source Not Available
What You'll Find in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2a-2
Required Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2a-3
4a. IF Amplitude Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2a-4
5a. DC Log Amplifier Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2a-9
Contents-1
Page 4
Contents
Contents-2
Page 5
1 Using this Adjustment Procedure
Supplement
This chapter contains an introduction that explains the need for this service guide
supplement and instructions on how to implement the supplement material.
1-1
Page 6
Using this Adjustment Procedure Supplement
Introduction
Introduction
The HP 3335A Synthesizer Level Generator signal source has become obsolete because
parts used in the manufacture of this instrument are no longer available from suppliers.
To meet the needs of our customers, HP has created new performance verification tests
and adjustment tests that use alternative signal sources.
The calibration and service guides are being revised to add additional procedures that do
not use the HP 3335A. The changes include the addition of signal sources required to
replace the 3335A, changes to the test equipment setup illustrations, and changes in the
steps required to execute the procedures.
Because all of our customers will not need to replace the HP 3335A immediately, we are
releasing the changes to the calibration guide and service guides in the form of two manual
supplements. HP is making these procedure revisions available at this time in electronic
form, only. You can download this manual supplement, and add it to your current manual
as needed. You will not be required to replace your manuals just to incorporate these
changes. These changes will be incorporated in new manuals shipped in the future.
To add these changes to your existing manuals, refer to “Implementation Instructions,” on
page 3.
1-2 Chapter1
Page 7
Using this Adjustment Procedure Supplement
Implementation Instructions
Implementation Instructions
Update your service guide by performing the following steps:
Step 1. After downloading this supplement, print a hard copy of the entire document.
Step 2. Remove page 2-1 through 2-10 from your service guide.
Step 3. Cross out Table 2-5, “Required Test Equipment for TAM,” on page 2-11.
Step 4. Insert page 2-1 through 2-12 from the supplement into the service guide.
Step 5. Remove the adjustment procedure chapter from the supplement, and insert it
into your service guide as Chapter 2a, “Manual Adjustment Procedures:
HP 3335A Source not Available,” immediately after Chapter 2.
Chapter 1 1-3
Page 8
Using this Adjustment Procedure Supplement
Implementation Instructions
1-4 Chapter1
Page 9
2 Adjustment Procedures
2-1
Page 10
Adjustment Procedures
Introduction
Introduction
This chapter contains information on automated and manual adjustment procedures.
Perform the automated procedures using the HP 85629B test and adjustment module
(TAM). Adjustments should be performed after a repair or performance test failure, never
perform adjustments as routine maintenance. Refer to Table 2-1 to for which adjustments
to perform.
Automated Procedures
Using the TAM
Manual Procedures
1. High Voltage Power Supply Adjustment
2. Display Adjustment
3. IF Bandpass Adjustment
4. IF Amplitude Adjustments
5. DC Log Amplifier Adjustments
6. Sampling Oscillator Adjustment
7. YTO Adjustment
8. LO Distribution Amplifier Adjustment (HP 8561E)
9. LO Distribution Amplifier Adjustment (HP 8563E)
10. Dual Band Mixer Bias Adjustment (HP 8561E)
11. Frequency Response Adjustment (HP 8561E)
12. Frequency Response Adjustment (HP 8563E)
13. Calibrator Amplitude Adjustment
14. 10 MHz Reference Adjustment — OCXO
15. 10 MHz Reference Adjustment — TCXO (Option 103)
16. Demodulator Adjustment
17. External Mixer Bias Adjustment
18. External Mixer Amplitude Adjustment
19. Signal ID Oscillator Adjustment
20. Switched YIG-Tuned Filter (SYTF) Adjustment (HP 8561E)
21. YIG-Tuned Filter/Mixer (RYTHM) Adjustment (HP 8563E)
22. 16 MHz PLL Adjustment
23. 600 MHz Reference Adjustment (serial prefix 3406A and above)
NOTE Before performing any adjustments, allow the spectrum analyzer to warm up
for at least 5 minutes.
Safety Considerations
Although this instrument has been designed in accordance with international safety
standards, this manual contains information, cautions, and warnings which must be
followed to ensure safe operation and to prevent damage to the instrument. Service and
adjustments should be performed only by qualified service personnel.
2-2 Chapter2
Page 11
WARNING
Adjustment Procedures
Introduction
• These servicing instructions are for use by qualified personnel
only. To avoid electrical shock, do not perform any servicing
unless you are qualified to do so.
• The opening of covers or removal of parts is likely to expose
dangerous voltages. Disconnect the product from all voltage
sources while it is being opened.
• Adjustments in this section are performed with power supplied to
the instrument and protective covers removed. There are voltages
at many points in the instrument which can, if contacted, cause
personal injury. Be extremely careful. Adjustments should be
performed only by trained service personnel.
• Power is still applied to this instrument with the
off position. Before removing or installing any assembly or
printed circuit board, remove the line-power cord.
• The power cord is connected to internal capacitors inside that
may remain live for 5 seconds after the instrument has been
disconnected from its source of supply.
• Use a nonmetallic adjustment tool whenever possible.
LINE switch in the
Which Adjustments Should Be Performed?
Table 2-1 lists the manual adjustments that should be performed when an assembly is
repaired or changed. It is important to perform the adjustments in the order indicated to
ensure that the instrument meets its specifications.
Chapter 2a, “Manual Adjustment Procedures: HP 3335A Source not Available,” provides
instructions and procedures for making adjustments when the HP 3335A Synthesizer
Level Generator is not available. If the HP 3335A is not available, substitute those
procedures for the procedures of the same number and name found in this chapter.
Test Equipment
The equipment required for the manual adjustment procedures is listed in Table 1-4,
“Recommended Test Equipment.” Any equipment that satisfies the critical specifications
given in the table may be substituted for the preferred test equipment.
Adjustable and Factory-Selected Components
Table 2-2 lists the adjustable components by reference designation and name. For each
component, the table provides a description and lists the adjustment number.
Refer to Table 2-3 for a complete list of factory-selected components used in the instrument
along with their functions. Factory-selected components are identified with an asterisk on
the schematic diagrams.
Chapter 2 2-3
Page 12
Adjustment Procedures
Introduction
Adjustment Tools
For adjustments requiring a nonmetallic tuning tool, use fiber tuning tool,
HP part number 8170-0033.
Two different tuning tools may be necessary for IF bandpass adjustments, depending on
the type of tuning slug used in the slug-tuned inductors. If the tuning slug requires a
slotted tuning tool, use HP part number 8710-1010. If the tuning slug requires a forked
tuning tool, use HP part number 8710-0772.
Never try to force an adjustment control. This is especially critical when tuning variable
capacitors or slug-tuned inductors. Required service accessories, with part numbers, are
listed under “Service Kit” in Chapter 1, “General Information”.
Instrument Service Position
Refer to Chapter 3, “Assembly Replacement”, for information on removing the spectrum
analyzer cover assembly and accessing all internal assemblies.
2-4 Chapter2
Page 13
Table 2-1 Related Adjustments
Adjustment Procedures
Introduction
Assembly
Changed or
Repaired
A1A1 keyboard No related adjustment
A1A2 RPG No related adjustment
A2 controller 16 MHz PLL adjustment
A3 interface Display adjustment (fast zero span)
Perform the Following Related Adjustments in the Order
Listed
Display adjustment
If EEROM from old A2controllercould not be used in a new A2 or
if EEROM must be replaced, also perform the following
adjustments:
LO distribution amplifier adjustment (HP 8561E)
LO distribution amplifier adjustment (HP 8563E)
Dual band mixer bias adjustment (HP 8561E)
External mixer amplitude adjustment
Switched YIG-tuned filter adjustment (HP 8561E)
YIG-tuned filter/mixer adjustment (HP 8563E)
Frequency response adjustment (HP 8561E)
Frequency response adjustment (HP 8563E)
Adjustment
Number
22
2
8
9
10
18
20
21
11
12
2
Frequency response adjustment (HP 8561E)
Frequency response adjustment (HP 8563E)
A4 log amp/cal osc Display adjustment (Fast Zero Span)
Demodulator adjustment
IF amplitude adjustment
DC log amplifier adjustment
A5 IF IF bandpass adjustment
IF amplitude adjustment
A6 power supply High voltage power supply adjustment
Display adjustment
A6A1 HV module High voltage power supply adjustment
Display adjustment
A7 LO
distribution
amplifier
LO distribution amplifier adjustment (HP 8561E)
Frequency response adjustment (HP 8561E) (or perform the
frequency response performance test in the HP 8560 E-Series
Spectrum Analyzer Calibration Guide. The adjustment must be
performed if the performance test fails.)
11
12
2
16
4
5
3
4
1
2
1
2
8
11
Chapter 2 2-5
Page 14
Adjustment Procedures
Introduction
Table 2-1 Related Adjustments (Continued)
Assembly
Changed or
Repaired
A7 switched LO
distribution
amplifier
A8 dual band
mixer
A8 low band
mixer
A9 input
attenuator
A9 input
attenuator
A10 SYTF Switched YIG-tuned filter (SYTF) adjustment (HP 8561E)
A10 RYTHM YIG-tuned filter/mixer (RYTHM) adjustment (HP 8563E)
Perform the Following Related Adjustments in the Order
Listed
LO distribution amplifier adjustment (HP 8563E)
Frequency response adjustment (HP 8563E) (or perform the
frequency response performance test in the HP 8560 E-Series
Spectrum Analyzer Calibration Guide. The adjustment must be
performed if the performance test fails.)
Dual band mixer bias adjustment (HP 8561E)
Frequency response adjustment (HP 8561E)
Frequency response adjustment (HP 8563E) 12
Frequency response adjustment (HP 8561E) (or perform the
frequency response performance test in the HP 8560 E-Series
Spectrum Analyzer Calibration Guide. The adjustment must be
performed if the performance test fails.)
Frequency response adjustment (HP 8563E) (or perform the
frequency response performance test in the HP 8560 E-Series
Spectrum Analyzer Calibration Guide. The adjustment must be
performed if the performance test fails.)
Frequency response adjustment (HP 8561E)
Adjustment
Number
9
12
10
11
11
12
20
11
21
Frequency response adjustment (HP 8563E)
A11 YTO YTO adjustment 7
A13 2nd
converter
A14 frequency
control
A15 RF 10 MHz reference adjustment (TCXO, Option 103)
Frequency response adjustment (HP 8561E)
Frequency response adjustment (HP 8563E)
Display adjustment (fast zero span)
YTO adjustment
LO distribution amplifier adjustment (HP 8561E)
LO distribution amplifier adjustment (HP 8563E)
Frequency response adjustment (HP 8561E)
Frequency response adjustment (HP 8563E)
Calibrator amplitude adjustment
External mixer bias adjustment
Sampling oscillator adjustment
Signal ID oscillator adjustment
External mixer amplitude adjustment
Frequency response adjustment (HP 8561E)
Frequency response adjustment (HP 8563E)
12
11
12
11
12
15
13
17
19
18
11
12
2
7
8
9
6
2-6 Chapter2
Page 15
Table 2-1 Related Adjustments (Continued)
Adjustment Procedures
Introduction
Assembly
Changed or
Repaired
A15U100 sampler Sampling oscillator adjustment 6
A17 CRT driver Display adjustment 2
A18V1 CRT Display adjustment 2
A19 HP-IB No related adjustment
A21 OCXO 10 MHz reference adjustment (OCXO) 14
Perform the Following Related Adjustments in the Order
Listed
Adjustment
Number
Table 2-2 Adjustable Components
Reference
Designator
A2R152 16 MHz PLL ADJ 22 Adjusts the free-running frequency of the
A2R206 DGTL X GAIN 2 Adjusts the horizontal gain in the X line
A2R209 SWEEP OFFSET 2 Adjusts the beginning of the trace to the
A2R215 DGTL Y GAIN 2 Adjusts the vertical gain in the Y line
Adjustment Name Adjustment
Number
Description
16 MHz CPU clock.
generator.
leftmost vertical graticule line in fast-analog
zero-span mode.
generator.
A2R218 VIDEO OFFSET 2 Adjusts the vertical position in fast-analog
zero span to match the digital zero-span
input.
A2R262 STOP BLANK 2 Adjusts the blanking at the end of a vector on
the display.
A2R263 START BLANK 2 Adjusts the blanking at the start of a vector
on the display.
A2R268 VIDEO GAIN 2 Adjusts the vertical gain in fast-analog zero
span to match with the digital zero-span
input.
A2R271 SWEEP GAIN 2 Adjusts the end of the trace to the rightmost
vertical-graticule line in fast-analog
zero-span mode.
A4C707 FM DEMOD 16 Adjusts the FM demodulation for a peak
response.
A4R445 LIMITER PHASE 5 Adjusts Limiter Phase for peak response.
A4R531 LOG AMP TOS 5 Minimizes error to Top of Screen.
A4R544 LIN FIDELITY BOW 5 Minimizes Linearity Fidelity error.
Chapter 2 2-7
Page 16
Adjustment Procedures
Introduction
Table 2-2 Adjustable Components (Continued)
Reference
Designator
A4R826 CAL OSC AMPTD 4 Sets calibration oscillator output power
A5L300 LC CTR 1 3 Adjusts center frequency of first stage of LC
A5L301 LC CTR 2 3 Adjusts center frequency of first stage of LC
A5L700 LC CTR 3 3 Adjusts center frequency of third stage of LC
A5L702 LC CTR 4 3 Adjusts center frequencyof fourth stage of LC
A5R343 15 DB ATT 4 Adjusts the attenuation of the reference
A5T200 XTAL CTR 1 3 Adjusts center frequency of first stage of
A5T202 XTAL CTR 2 3 Adjusts center frequency of second stage of
Adjustment Name Adjustment
Number
Description
(nominally −35 dBm). This power is injected
into the IF during the AUTO IF ADJUST
routines.
bandwidth filter to 10.7 MHz.
bandwidth filter to 10.7 MHz.
bandwidth filter to 10.7 MHz.
bandwidth filter to 10.7 MHz.
15 dB attenuatorfor 15 dB betweenminimum
and maximum attenuation.
crystal bandwidth filter to 10.7 MHz.
crystal bandwidth filter to 10.7 MHz.
A5T500 XTAL CTR 3 3 Adjusts center frequency of third stage of
crystal bandwidth filter to 10.7 MHz.
A5T502 XTAL CTR 4 3 Adjusts center frequency of fourth stage of
crystal bandwidth filter to 10.7 MHz.
A6R410 HV ADJ 1 Adjusts the voltage between A6TP405 and
A6TP401 to the voltage marked on the A6A1
high voltage module.
A14R42 6.01 GHz 7 Adjusts the main coil tune driver current at a
YTO frequency of 6.01 GHz (near the upper
YTO frequency limit).
A14R76 FM SPAN 7 Adjusts the FM span accuracy by affecting
the sensitivity of the FM coil driver.
A14R93 3.2 GHz 7 Adjusts the main coil fixed driver current at a
YTO frequency of 3.2 GHz (near the lower
YTO frequency limit).
A15C100 SMPL MATCH 6 Transforms the sampler input impedance to
50 ohms over the 285 to 297.2 MHz range.
A15C210 VCO RANGE 6 Adjusts the VCO tank capacitance so that
21 V on the VCO tune line equals 298 MHz
VCO frequency.
2-8 Chapter2
Page 17
Table 2-2 Adjustable Components (Continued)
Adjustment Procedures
Introduction
Reference
Designator
A15C629 SIG ID 19 Fine adjusts the 298 MHz SIG ID oscillator
A15U302 10 MHz ADJ 15 Adjusts frequency of the temperature
A15R561 CAL AMPTD 13 Adjusts amplitude of the 300 MHz calibrator
A15R926 EXT BIAS ZERO 17 Adjusts zero bias point of external mixer bias.
A17R4 Z GAIN 2 Adjusts maximum intensity.
A17R11 CUTOFF 2 Adjusts intensity to turn off blanked lines.
A17R21 Z FOCUS 2 Adjusts focus for lines of different brightness.
A17R26 X FOCUS 2 Adjusts focus at the left and right corners of
A17R34 COARSE FOCUS 2 Adjusts focus at the center of the display.
A17R55 X GAIN 2 Adjusts the horizontal-deflection amplifier
A17R57 X POSN 2 Adjusts the CRT horizontal position.
Adjustment Name Adjustment
Number
Description
frequency to optimize its performance.
compensated crystal oscillator (TCXO) to
10 MHz.
signal to −10.0 dBm.
the display.
gain.
A17R75 Y GAIN 2 Adjusts the vertical-deflection amplifier gain.
A17R77 Y POSN 2 Adjusts the CRT vertical position.
A17R90 TRACE ALIGN 2 Adjusts the display axis rotation.
A17R92 DDD 2 Adjusts focus of the center of the display.
A17R93 ASTIG 2 Adjusts for the spot roundness on the CRT
display.
Table 2-3 Factory Selected Components
Reference
Designator
A5C204 3 Selected to optimize center frequency of LC tank that loads the crystal.
A5C216 3 Selected to optimize center frequency of LC tank that loads the crystal.
A5C326 3 Selected to optimize LC pole center frequency.
A5C327 3 Selected to optimize LC pole center frequency.
A5C505 3 Selected to optimize center frequency of LC tank that loads the crystal.
A5C516 3 Selected to optimize center frequency of LC tank that loads the crystal.
A5C717 3 Selected to optimize LC pole center frequency.
A5C718 3 Selected to optimize LC pole center frequency.
Adjustment
Number
Basis of Selection
Chapter 2 2-9
Page 18
Adjustment Procedures
Using the TAM
Using the TAM
The HP 85629B TAM can be used to perform approximately half of the spectrum analyzer
adjustment procedures. Table 2-4 lists the TAM adjustments and their corresponding
manual adjustments.
The TAM adjustments do not include procedures for choosing factory-selected components.
If an adjustment cannot be made and a factory-selected component must be changed, refer
to the corresponding manual adjustment.
To select an adjustment, press
ADJUST. Position the pointer next to the desired adjustment using either the knob or step
keys. Press
EXECUTE, then follow the instructions displayed on-screen.
MODULE to display the TAM main menu, then press
Test Equipment
During the TAM adjustments, instructions for setting test equipment controls are
displayed, with the exclusion of the two tests listed below. Test equipment for these
adjustments are controlled automatically.
Test 10. Low Band Flatness
Test 11. High Band Flatness and YTF
Table 2-5 lists the test equipment needed to perform each TAM adjustment. Required
models must be used. Substitutions may be made for recommended models. Substitute
sources must operate over the frequency ranges indicated. Recommended substitutes are
listed in the configuration menu. If you must substitute the source with a user-defined
model, the adjustments run faster using a synthesized source rather than an
unsynthesized source.
NOTE When connecting signals from the HP 8340A/B (or any microwave source) to
the adjustment setup, use a high-frequency test cable with minimum
attenuation to 26.5 GHz. HP part number 8120-4921 is recommended for its
ruggedness, repeatability, and low insertion loss.
Adjustment Indicator
Toaid in making adjustments, the TAM displays an “Analog Voltmeter Display Box” along
the left-hand side of the display. A horizontal line moves inside the box to represent the
needle of an analog voltmeter. A digital readout appears below the box. Tick marks are
often displayed on the inside edges of the box indicating the desired needle position. (The
tick marks and needle are intensified when the needle is within this acceptable region.)
During some adjustments, an arrow appears along the right edge of the box. This arrow
always indicates the highest position the needle has reached. The arrow is useful when a
component must be adjusted for a peak response; if the peak is overshot, the arrow
indicates where the peak was. The component can be readjusted until the needle is at the
same position as the arrow.
2-10 Chapter2
Page 19
Adjustment Procedures
Using the TAM
Table 2-4 TAM Adjustments
TAM Adjustment Corresponding Manual Adjustment Adjustment
Number
1. IF bandpass, LC poles IF bandpass adjustment 3
2. IF bandpass, crystal poles IF bandpass adjustment 3
3. IF amplitude IF amplitude adjustment 4
4. Limiter phase DC log amplifier adjustments, A4 limiter phase 5
5. Linear fidelity DC log amplifier adjustments, A4 linear fidelity 5
6. Log fidelity DC log amplifier adjustments, A4 log fidelity 5
7. Sampling oscillator Sampling oscillator adjustment 6
8. YTO YTO adjustment 7
9. LO distribution amplifier First LO distribution amplifier adjustment 8
10. Low band flatness Frequency response adjustment 9
11. High band flatness and YTF Frequency response adjustment 9
YIG-tuned filter/mixer adjustment 17
12. Calibrator amplitude Calibrator amplitude adjustment 10
13. 10 MHz reference oscillator 10 MHz reference adjustment − TCXO 12
(Option 103)
14. External mixer bias External mixer bias adjustment 14
15. External mixer amplitude External mixer amplitude adjustment 15
Chapter 2 2-11
Page 20
Adjustment Procedures
Using the TAM
Table 2-5 Required Test Equipment for TAM
Adjustment Equipment Used Required
1. IF Bandpass, LC Poles None
2. IF Bandpass, Crystal
Poles
3. IF Amplitude Signal Generator
4. Limiter Phase Signal Generator
5. Linear Fidelity Signal Generator
6. Log Fidelity Signal Generator
7. Sampling Oscillator Manual Probe Cable
8. YTO Frequency Counter (3 to
9. LO Distribution
Amplifier
10. Low Band Flatness Source (10 MHz to 2.9 GHz)
11. High band flatnessand
YTF
11. Calibrator Amplitude Power Meter
12. 10 MHz Reference
Oscillator
13. External Mixer Bias Manual Probe Cable
14. External Mixer
Amplitude
None
Test Cable (SMB to BNC)
Manual Probe Cable
Test Cable BNC
Test Cable BNC
Test Cable BNC
6.8 GHz)
Power Meter
Power Sensor
(3 to 6.8 GHz, 10 to 20 dBm)
Power Meter
Power Sensor
(10 MHz to 2.9 GHz)
Power Splitter
(10 MHz to 2.9 GHz)
Source (2.8 to 26.5 GHz)
Power meter
Power sensor (2.8 to 26.5 GHz)
Power splitter
(2.8 to 26.5 GHz)
Power Sensor HP 8482A,
Frequency Counter
(9 to 11 MHz)
Power Meter
Power Sensor
(310.7 MHz, −25 to −35 dBm)
Source (310.7 MHz, −30 dBm)
Model
HP E4421B or
HP 8663A
HP E4421B or
HP 8663A
HP E4421B or
HP 8663A
HP E4421B or
HP 8663A
HP 8481A
Recommended
Model
85680-60093
HP 10503A
HP 10503A
HP 10503A
HP 5342A, HP 5343A
HP 8902A, HP 436A,
HP 438A
HP 8485A
HP 8340A/B
HP 8902A, HP 436A,
HP438A
HP 8482A, HP 8481A
HP 11667B
HP 8340A
HP 8902A, HP 436A,
HP 438A
HP 8485A
HP 11667B
HP 8902A, HP 436A,
HP 438A
HP 5342A, HP 5343A
HP 8902A, HP 436A,
HP 438A
HP 8481D, HP 8484A
HP 8340A/B
2-12 Chapter2
Page 21
2a Manual Adjustment Procedures:
HP 3335A Source Not Available
2a-1
Page 22
Manual Adjustment Procedures: HP 3335A Source Not Available
What You'll Find in This Chapter
What You'll Find in This Chapter
This chapter provides alternative procedures for the adjustment of the spectrum analyzer
that do not require the use of the HP 3335A Synthesizer Level Generator. The HP 3335A
has been discontinued. Because of the unavailability of the HP 3335A, new adjustment
procedures are required that use different signal sources. If the HP 3335A is not available,
substitute these procedures for those of the same number found in Chapter 2, “Adjustment
Procedures.”
2a-2 Chapter2
Page 23
Manual Adjustment Procedures: HP 3335A Source Not Available
Required Test Equipment
Required Test Equipment
The following table lists the test equipment required to execute the adjustments in this
chapter. These adjustments originally required the use of the HP 3335A Synthesizer Level
Generator. .
Table 2a-1 Recommended Test Equipment
Instrument Critical Specifications for Equipment
Substitution
Sources
Synthesized Signal Generator
Cables
Cable, 50 Ω coaxial
(four required)
Cable Test Cable 85680-60043
Adapters
Adapter
(four required)
Frequency range: 250 kHz to 3 GHz
Frequency resolution: 1 Hz
Attenuator resolution: 0.02 dB
Level accuracy: ±0.5 dB
External 10 MHz Ref. Input
Connectors: BNC (m)
Length: ≥ 122 cm (48 in.)
Type N (m)-to-BNC (f) 1250-1476
Recommended
Model
HP E4421B or
HP E4422B,
HP E4432B,
HP E4433B
HP 10503A
Adapter
(Option 026 only)
Adapter
(Option 026 only)
Chapter 2 2a-3
APC-3.5 (f) to APC-3.5 (f) 5061-5311
APC-3.5 (f) to BNC-3.5 (f) 1250-1200
Page 24
Manual Adjustment Procedures: HP 3335A Source Not Available
4a. IF Amplitude Adjustments
4a. IF Amplitude Adjustments
The IF amplitude adjustments consist of the cal oscillator amplitude adjustment and the
reference 15 dB attenuator adjustment.
Assembly Adjusted
A4 log amp/cal oscillator A5 IF assembly
Related Performance Tests
IF Gain Uncertainty Scale Fidelity
Description
This adjustment sets the output amplitude of the A4 log amp/cal oscillator and the
absolute amplitude of the reference 15 dB attenuator.
The output of the A4 log amp/cal oscillator is adjusted so that a −55 dBm signal applied to
the 10.7 MHz IF input on the A5 IF assembly (A5J3) causes a displayed signal of −60 dBm.
The effect of this adjustment is visible only after the
complete.
amplitude from the A4 log amp/cal oscillator.
This procedure also sets the attenuator of the reference 15 dB attenuator so that a source
amplitude change of 50 dB combined with a spectrum analyzer reference level change of
50 dB displays an amplitude difference of 50 dB.
Figure 2a-1 IF Amplitude Adjustment Setup
ADJ CURR IF STATE causes the IF gain adjustment to use the “new” output
ADJ CURR IF STATE sequence is
2a-4 Chapter2
Page 25
Manual Adjustment Procedures: HP 3335A Source Not Available
4a. IF Amplitude Adjustments
Equipment
Signal Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP E4421B
Adapters
Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476
Cables
BNC, 122 cm (48 in) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HP 10503A
Test cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85680-60093
Figure 2a-2 IF Amplitude Adjustment Locations
NOTE The 15 dB reference attenuator adjustment is preset at the factory and need
not be done if the entire A5 IF assembly is replaced.
Chapter 2 2a-5
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Manual Adjustment Procedures: HP 3335A Source Not Available
4a. IF Amplitude Adjustments
Procedure
1. Press LINE to turn the spectrum analyzer off. Remove the spectrum analyzer cover and
place the spectrum analyzer in the service position as illustrated in Figure 2a-1.
2. Disconnect W29, violet coax cable, from A5J3. Connect the test cable between A5J3 and
the RF output of the HP E4421B. Press
3. Set the spectrum analyzer controls as follows:
Center Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.7 MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .200 kHz
Reference Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .−60 dBm
Attenuator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 dB
dB/division . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 dB/DIV
Resolution bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 kHz
Video bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .100 Hz
LINE to turn the spectrum analyzer on.
4. On the spectrum analyzer, press
MKR, CAL, and IF ADJ ON OFF so OFF is underlined.
5. Set the HP E4421B controls as follows:
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.7 MHz
Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .−55 dBm
Mod On/Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Off
6. Note the marker value. Ideally it should read −60 dBm ±0.1 dB.
7. If the marker reads less than −60.1 dBm, rotate A4R826 CAL OSC AMPTD one-third
turn clockwise for every 0.1 dB less than −60 dBm. See Figure 2a-2 for the location of
A4R826. A change in the displayed amplitude will not be seen until
ADJ CURR IF STATE
is pressed.
8. If the marker reads greater than −59.9 dBm, rotate A4R826 CAL OSC AMPTD
one-third turn counter clockwise for every 0.1 dB greater than −60 dBm. See
Figure 2a-2 for the location of A4R826. A change in the displayed amplitude will not be
seen until
ADJ CURR IF STATE is pressed.
NOTE If A4R826 has inadequate range, refer to “Inadequate CAL OSC AMPTD
Range” in Chapter 8, “IF Section”.
9. On the spectrum analyzer, press
ADJ CURR IF STATE. After allowing the analyzer time
to complete the adjustments, the displayed amplitude and marker reading should
change.
10.Repeat step 7 through step 9 until the marker reads −60 dBm ±0.1 dB.
11.Disconnect the test cable from A5J3 and reconnect W29 to A5J3.
2a-6 Chapter2
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Manual Adjustment Procedures: HP 3335A Source Not Available
4a. IF Amplitude Adjustments
A5 Reference Attenuator Adjustment
1. Set the spectrum analyzer reference level to −60 dBm. If markers are displayed, press
MKR and MARKERS OFF.
2. Set the HP E4421B
Amplitude to −60 dBm.
3. Connect a BNC cable between the RF output of the HP E4421B and the spectrum
analyzer INPUT 50Ω.
4. On the spectrum analyzer,press
CAL and REF LVL ADJ. Use the front panel knob or step
keys to place the peak of the displayed signal 3 dB to 5 dB below the reference level.
5. On the spectrum analyzer, press
PEAK SEARCH and MARKER DELTA. Set the spectrum
analyzer reference level to −10 dBm.
6. Change the HP 4421B
7. On the spectrum analyzer, press
Amplitude to −10 dBm.
CAL.
8. Note the ∆MKR amplitude. Ideally, it should read 50.00 dB ±0.1 dB.
9. If the ∆MKR amplitude is less than 49.9 dB, rotate A5R343 15 dB ATTEN one-half turn
counterclockwise for each 0.1 dB less than 50.00 dB. Do not adjust A5R343 more than
five turns before continuing with the next step.
10.If the ∆MKR amplitude is greater than 50.1 dB, rotate A5R343 15 dB ATTEN one-half
turn clockwise for each 0.1 dB greater than 50.00 dB. Do not adjust A5R343 more than
five turns before continuing with the next step.
11.On the spectrum analyzer, press
ADJ CURR IF STATE. Note the ∆MKR amplitude
reading.
12.Repeat step 1 through step 11 until the ∆MKR amplitude reading is 50.00 dB ±0.1 dB.
Chapter 2 2a-7
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Manual Adjustment Procedures: HP 3335A Source Not Available
4a. IF Amplitude Adjustments
A5 Adjustment Verification
1. On the spectrum analyzer, disconnect W29 from A5J3. Connect the test cable between
A5J3 and the RF output of the HP E4421B.
2. Set the spectrum analyzer reference level to −10 dBm.
3. Set the HP E4421B
4. On the spectrum analyzer, press
Amplitude to −5 dBm.
MKR and MARKER NORMAL.
5. The MARKER amplitude should read −10 dBm ±0.13 dB. If the reading is outside of
this range, repeat step 4, on page 2a-6 through step 12, on page 2a-7.
6. On the spectrum analyzer, reconnect W29 to A5J3. Press
PRESET and set the controls
as follows:
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 Hz
Reference level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .−10 dBm
Resolution bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 kHz
7. Connect a BNC cable between the HP 8563E CAL OUTPUT and INPUT 50Ω.
8. On the spectrum analyzer, press
MKR CAL and REF LVL ADJ.
9. Use the knob or step keys to adjust the REF LEVEL CAL setting until the MKR reads
−10.00 dBm ±0.1 dB.
10.On the spectrum analyzer, press
STORE REF LVL.
2a-8 Chapter2
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Manual Adjustment Procedures: HP 3335A Source Not Available
5a. DC Log Amplifier Adjustments
5a. DC Log Amplifier Adjustments
There are three DC log adjustments; limiter phase, linear fidelity, and log fidelity.
Assembly Adjusted
A4 log amp/cal oscillator
Related Performance Tests
IF Gain Uncertainty Scale Fidelity
Description
These three adjustment need only be done under the following conditions:
Limiter phase Only if a repair is made to blocks F, G, H, I, or J.
Linear fidelity Only if a repair is made to blocks C, D, F, G, H, I, J, K, O, IF gain accuracy,
RBW switching, or log fidelity.
Log fidelity Only if a repair is made to blocks D, F, H, K, IF gain accuracy, RBW
switching, or log fidelity.
If multiple adjustments are required they should be done in the following order:
1. Limiter Phase
2. Linear Fidelity
3. Log Fidelity
Figure 2a-3 DC Log Adjustment Setup
Chapter 2 2a-9
Page 30
Manual Adjustment Procedures: HP 3335A Source Not Available
5a. DC Log Amplifier Adjustments
Equipment
Signal Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .HP E4421B
Adapters
Type N (m) to BNC (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1250-1476
Type N (f) to 2.4 mm (f) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 11903B
Cables
BNC, 122 cm (48 in) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 10503A
Test cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .85680-60093
Figure 2a-4 DC Log Adjustment Locations
NOTE Adjustments should be made with all of the shields on and only after allowing
at least a 20 minute warmup.
2a-10 Chapter2
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Manual Adjustment Procedures: HP 3335A Source Not Available
5a. DC Log Amplifier Adjustments
A4 Limiter Phase Adjustment
1. Press LINE to turn the spectrum analyzer off. Remove the spectrum analyzer cover and
place the spectrum analyzer in the service position as illustrated in Figure 2a-3. See
Figure 2a-4 for adjustment location.
2. Connect the HP E4421B RF output to the spectrum analyzer 50Ω input. Press
turn the spectrum analyzer on.
3. Set the spectrum analyzer controls as follows:
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 MHz
Reference level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −10 dBm
dB/division . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 dB/DIV
Resolution bandwidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 kHz
IF ADJ. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OFF
4. Set up an HP E4421B as follows:
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 MHz
Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −18 dBm
Mod On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Off
5. Press
press
CAL, ADJ CURR IF STATE, wait for the analyzer to complete adjustments then
MKR.
LINE to
6. Adjust A4R445 for maximum on-screen amplitude. Refer to Figure 2a-4 for the location
of A4R445.
Chapter 2 2a-11
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Manual Adjustment Procedures: HP 3335A Source Not Available
5a. DC Log Amplifier Adjustments
A4 Linear Fidelity Adjustment
1. Press LINE to turn the spectrum analyzer off. Remove the spectrum analyzer cover and
place the spectrum analyzer in the service position as illustrated in Figure 2a-3. See
Figure 2a-4 for adjustment location.
2. Connect the HP E4421B RF output to the spectrum analyzer 50Ω input. Press
turn the spectrum analyzer on.
3. On the spectrum analyzer, press
UNITS, dBm, CAL, and IF ADJ ON OFF (OFF).
PRESET AMPLITUDE, LINEAR, MORE 1 of 3, AMPTD
4. Set the spectrum analyzer controls as follows:
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 MHz
Span . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 MHz
Resolution bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300 kHz
Reference level. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .−10 dBm
5. Set up an HP E4421B as follows:
Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 MHz
Amplitude. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .−10 dBm
Mod On/Off. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Off
6. On the spectrum analyzer, press
PEAK SEARCH and MARKER DELTA.
7. Reduce the HP E4421B input power to −58 dBm.
8. If the delta marker amplitude reads −40 dB ±2 dB, no adjustment is necessary.
LINE to
9. If the signal is lower on the screen than expected (delta marker amplitude reads less
than −42dB) then adjust A4R544 (see Figure 2a-4) for an even lower level and press
CAL and ADJ CURR IF STATE. Allow sufficient time for the analyzer to complete the
adjustment.
10.If the signal is higher on the screen than expected (delta marker amplitude reads
greater than −38 dB) then adjust A4R544 for an even higher level signal and press
CAL
and ADJ CURR IF STATE. Allow sufficient time for the analyzer to complete the
adjustment.
11.Repeat step 7 through step 10.
2a-12 Chapter2
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Manual Adjustment Procedures: HP 3335A Source Not Available
5a. DC Log Amplifier Adjustments
A4 LOG Fidelity Adjustment
1. Press LINE to turn the spectrum analyzer off. Remove the spectrum analyzer cover and
place the spectrum analyzer in the service position as illustrated in Figure 2a-3. See
Figure 2a-4 for adjustment location.
2. Connect the HP E4421B RF output to the spectrum analyzer 50Ω input. Press
turn the spectrum analyzer on.
3. On the spectrum analyzer, press
ADJ CURR IF STATE.
PRESET, CAL, IF ADJ ON OFF (OFF), and
4. Set the spectrum analyzer controls as follows:
Center frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 MHz
Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 MHz
Resolution bandwidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 300 kHz
Reference level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −10 dBm
5. Set up an HP E4421B as follows:
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 MHz
Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −10 dBm
Mod On/Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Off
6. On the spectrum analyzer, press
MKR, MARKER DELTA on the spectrum analyzer.
7. Decrease the HP E4421B power to −26 dBm.
LINE to
8. Calculate the error:
Error delta marker reading 16 dB–=
9. If the error is less than ±0.2 dB, no adjustment is necessary.
10.Set the HP 3335A power to −10 dBm.
11.Adjust A4R531 (see Figure 2a-4) to read two times the error.
For example, if the calculated error is +0.75 dB, adjust A4R531 for a delta marker
amplitude reading of +1.5 dB.
12.On the spectrum analyzer, press
13.Repeat step 7 through step 12.
CAL and ADJ CURR IF STATE.
Chapter 2 2a-13
Page 34
Manual Adjustment Procedures: HP 3335A Source Not Available
5a. DC Log Amplifier Adjustments
2a-14 Chapter2
Page 35
Index
A
A4 limiter phase adjustment
2a-10
A4 linear fidelity adjustment
2a-11
A4 log fidelity adjustment
adjustment
adjustable components table
2-6
factory selectedcomponents
related adjustments table
safety considerations
TAMand corresponding manual
adjustments
TAM test equipment
information
TAM test equipment list
tools
, 2-5
using TAM
adjustment procedures
cal oscillator amplitude
DC log amplifiers
IF amplitude
adjustments
recommended test equipment
2a-3
C
components
adjustable components table
2-6
, 2-11
, 2-11
, 2-11
, 2a-4
, 2a-12
, 2-5
, 2-3
, 2-12
, 2-3, 2-13
, 2a-4
, 2a-9
,
,
,
, 2-6
,
test equipment information,
2-11
test equipment list
test and adjustment module
test equipment list
test equipment list for TAM
adjustments
tools
adjustment
U
using the supplement
,
, 2-12
, 2-11
, 2a-3
, 2-12
, 2-5
, 1-1
D
DC log amplifer adjustments
2a-9
H
HP 85629B Test and Adjustment
Module
I
IF amplitude adjustments
implementation instructions
introduction
L
limiter phase adjustment
linear fidelity adjustment
log fidelity adjustment
T
TAM adjustments
adjustment indicators
corresponding manual
Index Index-1
, 2-11
, 1-2
adjustments
, 2-11, 2-13
, 2-11
,
, 2a-4
, 1-3
, 2a-10
, 2a-11
, 2a-12
, 2-11
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