HP 8340b User manual

Errata
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8340B/8341B Synthesized Sweeper Manual Change 16
08340-90243Ch16
December 1990

HP 8340B
HP 8341B
SYNTHESIZED
SWEEPERS
• •• • ..... • LJ oo DULJLJ
LJUJLJ oooao oo UUUO i
^JULJ o OOQ ^^ oo UCJUU I
ULJL3I-) :LJLJLJL.J UU Ol-l ULIUU {
HEWLETT
PACKARD

HP 8340B
SYNTHESIZED SWEEPER
(Including Options 001, 004,
005, 006, and 007)
HP 8341B
SYNTHESIZED SWEEPER
(Including Option 004)
SERIAL NUMBERS
This manual applies directly to the HP 8340B Synthesized
Sweeper having a serial number prefix of 2624A and the HP 8341 B
Synthesized Sweeper prefixed 2624A.
For additional Information about serial numbers, refer to
INSTRUMENTS COVERED BY THE MANUAL In Section I.
• Manual Changes Supplement Print Date: 03 DEC 1990 Rev, 15
Change Documents
Prefix Change Documents Prefix Change Documents Prefix
2634A
2643A
2650A
2730A
2802A
2804A
2812A
2819A
291 OA
10
11
12
13
14
15
16
2920A
2928A
3006A
3008A
301 OA
3009A
3018A
3050A
© Copyright HEWLETT-PACKARD COMPANY 1986
1400 POUNTAINGROVE PARKWAY, SANTA ROSA, CA 95401 U.S.A.
MANUAL PART NO. 08340-90243
Microfiche Part Number 08340-90244 Printed: AUGUST 1986
i'a HEWLETT
PACKARD

VOLUME 2
TABLE OF CONTENTS
SECTION IV PERFORMANCE TESTS
Introduction .........................
Calibration Cycle .....................
Recommended Test Equipment .........
4-1.
4-2. Internal Time Base Aging Rate .....
Frequency Range and
CW Mode Accuracy .............
Sweep Time Accuracy ............
4-3.
4-4.
4-5.
4-6.
4-7.
Swept Frequency Accuracy ........
Maximum Leveled Output Power
and Power Accuracy Test ........
External Leveling ................
Spurious Signals Test
(10 MHz to 22 GHz - HP 8340B only)
(10 MHz to 20 GHz - HP 8341 B) ....
Spurious Signals Test, 22 to 26.5 GHz
4-8.
4-9.
4-10.
4-11.
4-12.
4-13.
4-14.
4-15.
4-16.
4-17.
(Applies only to HP 8340B) ........
Single Sideband Phase Noise ......
Power Sweep Test ...............
Pulse Modulation On/Off Ratio Test .
Pulse Modulation
Rise and Fall Time Test ..........
Pulse Modulation Accuracy Test ....
Pulse Modulation Video
Feedthrough Test ...............
Amplitude Modulation Test .........
FM Accuracy and Flatness .........
HP 8340B/41B HP-IB Operation
Verification Test ................
Test Record ......................
AUTOMATED TEST PROCEDURES
SECTION V ADJUSTMENTS
Introduction ......................
Safety Considerations ..............
. 4-1
. 4-1
. 4-3
. 4-9
4-13
4-19
4-21
4-25
4-33
4-37
4-41
4-45
4-53
4-55
4-57
4-63
4-67
4-71
4-75
4-83
4-89
5-1
5-1
Equipment Required ...................
Adjustment Tools .....................
Factory Selected Components ...........
Related Adjustments ...................
Location of Test Points and Adjustments ..
Accessing and Storing Calibration Constants
Introduction .........................
Procedure to Access Calibration Constants
Procedure to Store the Calibration Constants
5-1. +22 VDC Power Supply, A35 ......
5-2. 10 MHz Standard Adjustment, A51
5-3. 100 MHz Voltage-Controlled
Crystal Oscillator (VCXO), A30 .....
5-4, M/N Loop, A32, A33, and A32A1 ....
5-5. 20/30 Loop Phase Lock, A36, A38,
A39, A40, and A43 ......„....,.-
5-6. YO Pretune DAC, A54 ............
5-7. YO Main Driver, A55 ....... ....
5-8. YO Loop Adjustments ............
5-9. FM Accuracy and FM
Overmod Adjustment ............
5-10. YO Delay Compensation, A54 ......
5-11. 3.7 GHz Oscillator, A8 ............
5-12. Marker/Bandcross, A57 .........
5-13. Sweep Generator, A58 ...........
5-14. Unleveled RF Output Adjustments ...
5-15. ALC Adjustments ................
5-16. Leveled RF Output Adjustments ...
5-17. RF Output Power
Flatness Adjustment .............
5-18. Pulse Adjustments ...............
5-19. External Module
Leveling Adjustment .............
HP 8340B/41B Table of Contents

Section IV: Performance Tests
INTRODUCTION
The procedures in this section test the HP 8340B and HP 8341 B's electrical performance using the
specifications given in Section I as the performance standards. These tests are intended for use in
incoming inspection, calibration verification, and post-repair performance verification. All tests can be
performed without access to the interior of the instrument. An HP-IB Operation Verification procedure
is also provided at the end of this section to verify proper HP-IB operation of the instrument.
RECOMMENDED TEST EQUIPMENT
Table 4-2 is a complete list of all required equipment for the tests and adjustments supplied in Section
IV, Performance Tests, and Section V, Adjustments. Test equipment other than that noted in the table
may be substituted if it meets or exceeds the critical specifications indicated in the table.
TEST RECORD
Results of the Performance Test procedures may be tabulated on the test record card located at the
end of this section. Each test lists all of the tested specifications and their acceptable limits. The
results recorded at incoming inspection can be used for comparison in periodic maintenance and
troubleshooting and after repairs or adjustments have been made.
CALIBRATION CYCLE
This instrument requires periodic verification of performance. The instrument should be checked
using the following performance tests at least once every year.
NOTE
The acronym "DUT" (Device Under Test) is used to describe the HP
8340B or 8341B (HP 8340B/41B) under test. The acronym "LO" is used to
describe the Local Oscillator.
Options 001, 005, 006, and 007 apply only to HP 8340B's.
HP 8340B/41B Performance Tests 4-1

Table 4-1. List of Manual Performance Tests1
Test Number
4-1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4-9
4-10
4-111
4-121
4-131
4-14'
4-15
4-16
4-172
1. This test Is not applicable to instruments equipped with Option 006, Delete Pulse Modulation.
2. This is not a Performance Test. It is included as an additional aid to determine that the HP-IB circuitry is operating properly.
Performance Test Title
Internal Time Base Aging Rate
Frequency Range and CW Mode Accuracy
Sweep Time Accuracy
Swept Frequency Accuracy
Maximum Leveled Output Power and Power Accuracy
External Leveling
Spurious Signals Test (10 MHz to 22 GHz - HP 8340B)
(10 MHz to 20 GHz - HP 8341 B)
Spurious Signals Test (22 to 26.5 GHz - HP8340B only)
Single Sideband Phase Noise
Power Sweep Test
Pulse Modulation ON/OFF Ratio Test
Pulse Modulation Rise and Fall Time Test
Pulse Modulation Accuracy Test
Pulse Modulation Video Peedthrough Test
Amplitude Modulation Test
FM Accuracy and Flatness
HP-IB Operation Verification Test
Page
4-9
4-13
4-19
4-21
4-25
4-33
4-37
4-41
4-45
4-53
4-55
4-57
4-63
4-67
4-71
4-75
4-83
Performance Tests HP 8340B/41B

oyoo " uo^ (
~j^ry)2LC.co^^ /^^^ v^^ H\^M^
^DQItfBLE-BALANCED
tMieRQWAVE MIXER 1-26 GHz
MODEL
DMS1^26A-
• 7.0 dB Typical Midband Conversion Loss
• 22 dB Typical Midband L-R Isolation
Guaranteed Specifications*
(From -55°Cto +85°C)
Frequency Range
Conversion Loss**
Isolation
RF, LO Ports
IF Port
1-6 GHz
6-18 GHz
18-26
LO to RF
LO to IF
1-26 GHz
DC-500 MHz
8 5 dB Max
QOdBMax
100dBMax
ISdBMin
IBdBMIn
Typical Performance
Operating Characteristics
Impedance 50 Ohms Nominal CONVERSION LOSS
Maximum Input
Total Power +23dBmMax@25°C
RF Input
1 dB Compression +3dBmMin 3 ^
Within 1 dB of Conversion
Loss Max
SSB Noise Figure
Package Type Connectorized (C-26)
(See pages340 to 349 for physical dimensions) 0 4 I 12 18 20 24 2«
Environmental
These units are designed to meet the environmental requirements
of Table 1A, page 35P of the Adams-Russell Electronics catalog
*AJI specifications appty when operated at + B 5 dBm LO power wilh 50 onm source and
toad impedance
* *For IF frequencies of 100 MHz and an RF power of -10 dBm or lower.
For additional RHG products see tha latest RHG Electronics Laboratory, Inc catalog
ISOLATION
\
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FREQUENCr (GHt)
IF PORT RESPONSE
3 os
& 0
Ordering Information
^ z
200 400
FREQUENCY(MHz)
Model No. Connectors Unit Price
(1-9 Units)
DMS1-26A
Delivery is from stoct<
SMA $830
D^MC^
A Subsidiary of
Adams-Russell Electronics
RHG Electronics Laboratory...
Make the Connection
161 East Industry Court, Deer Park, NY 11729 (51G) 242-1100 TWX 510.227.6083
224

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• 08/29/«
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SP1 16 48 EA 214JXXD 246.1010 246.1000 3 X 09/29/98
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1.698 GHZ KQt 1.758 GHZ WXf VSflb
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GBERAU
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TYPE: HLCR
ELECTRICAL;
FREGUaCY
van 1 GHZ
MAX: 26 GHZ
VS«: 4MAX
MECHANICAL:
hD. OF RF PORTS: 3
RF PORT COMCCTORS: Sm
DOOBIONS:
LEhCTH: 2.000 IN
WIDTH: 1.290 IN
HEIGHT: 0.600 IN
CUSTOM CLASSIFICATION INOEX:
16 CHARACTER DESCRIPTION;
40 CHARACTER
DESCRIPTION:
PURCHASE
OTOER DESCRIPTION;
REFERENCEDATA:
1638
U-UAVEWR
U-UWE MIXER 26 GHZ HU
KD<ER
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1 GHZ KIN; 26 GHZ MAX; VSJR: 4
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TYPE SHE
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0955-0307-1 fCt
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ADDRESS » DEER PARK NT DATE » 10/22/85
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DIVISIONAL USAGE QATA:
DM t®X (KKJSAGE m •
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LAST ACTIVITY DATE • 02A)5/88
PART STATUS • « COC6 NOT AP
GBGAL:
WOTOWE COPOMW
TYPE: MUER
ELECTRICAL:
FREOJaCY
KD* 1 Wl
MAX: 1 GHZ
PCMER CAPACITY: 50 MJ
IH'GDMCE: 50CWS
ISOLATION; 20 m KIN
MECHANICAL:
RF PORT CONCCTORS: PC f
DIMENSIONS:
LBCTH: 0.500 IN
WIDTH: 0.230 IN
HEIGHT: 0.255 IN
SBWVSl 4 PIN PACKAGE
CUSTOMSCLASSIFICATION DOEX:
16 CHARACTER DESCRIPTIOrC
40 CHARACTERDESCRIPTION:
PURCHASE
ORDERDESCRIPTION;
J< WME» K»LWCROUAre . -- -.,-.-,-
ADORESSa SAUSBURy M) US ClATE" 06/20/85
HPN a aB12&-1728/60-OyO
STO-COST OOfKOST INT-C06T OS P V S A B Dt-MTE
104.0000119.6000119.6000 ** X 09/30/92
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0955-0308 ER »00 CATEGORY
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LAST ACTIVITY DATE » 07/19/88
PART STATUS 3 IV CODE NOT APPLICABLE
GB4ERAL:
MICROUWE COI-POTCNT
TYPE: ATTOAJATOR
ELECTRICAL:
FREQUENCY
MAX: 1.5 GHZ
VSUR: 1.7 MAX
PCMBR CAPACITY: 530 M
WBWCE: 500WS
ATTBA1ATIOI* 1 CB
MECHANICAL:
RF PORT CONNECTORS:PC PINS
DIMENSIONS:
LENGTH: 0.500 IN
WIDTH: 0.230 IN
HEIGHT; 0.255 IN
REWRCS: &-f
IN PACKAGE
CUSTOre CLASSIFICATION MCfc 4446
REFERENCEDATA:
N3TES:
[WINSS:
TECHNICAL:
TYPE SIZE Dfi
01 A 09
SUPPLIER DATA: __
A) APPROVED 02739 MINI ^
^
r
DIVISIONAL USAGE DATA:
DIV KDX 6M»-USASE W STD-C
04P1 01 EA 11.S
53P1 16 25 EA 11.S
F(
0955-CS37 ER»04
LAST ACTIVITY DATE » 10/3)/)
PART STATUS s » COCE
NOT i
GBERAL:

FOR INTERNAL
0 CATEGORY
35/88
•OT APPLICABLE
^
• 078 CURRENT
MTE a 08/29/92 ^
:urfW<
DIVISIONAL USAGE DATA:^B _
DIV KDX ftO-USASE urfW<06T DOM-COST INT-C06T DS P V S A B IN-DATE
53P1 16 48 EA 214JQQO 246.1000 246.1000 3 X 09/29/92
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1.698 GHZWN. 1.758 GHZ MAX; VSWt
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DfUWirfi NUWER
0955-0282-1
5951-1647-1
REV DIST: 70-SIP PCM
A Y
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LAST ACTIVITY WtE a 10/09/89
PART STATUS • H COCeNOT APPUOCLE
GENERAL:
WCROWE COfOBff
rrpe: HUER
ELBCTOICAL!
FREGUENCY
HOC 1 CHZ
MAX: 26 GHZ
VSUR: 4 MAX
MECHM4ICAU
NO. OF RF PORTS: 3
RF PORT CONCCTORS: SHA
DDOEIOC:
LENGTH: 2.000 IN
WIDTH: 1.250 IN
HEIGHT: 0.600 IN
CUSTOMS CLASSIFICATION DCEX:
16&WACTER DESCRIPTION;
40 CHARACTEROESCR2FTION!
PURCHASEORDER tCSCRIPTION!
REFERENCE OATA:
1638
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U-UAVE KUER 26 GHZ MAX
KUER
PB» HP CMGCS): A-0955-OB07'-1
1 GHZ KIN; 26 GHZ HAX; VSUfc 4
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DRPUINGS:
SUPPLIER DATA:
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TYPE SIZE DRMINS NJ«ER
01 A 0955-0307-1 REV
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LAST ACTIVITY DATE • OZXB/88
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ISOLATION; 20 CBtCN
MECHANICAL;
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WIDTH: 0.230 IN
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REMARKS: 4 PIN PACKAGE
CUSTOMSCLASSIFICATION DCEX:
16 CHARACTER DESCRIPTIOrc
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PLACHASEORDER DESCRIPTION;
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104.0000 119.6000 119.6000 ** X
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G0CRAL:
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TYPE: ATTBMJftTOR
ELBCTRICAL:
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VSUR: 1.7 MAX
POWER CAPACITY: 5DO M
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ATTaUATIOl* 1 CB
MECHANICAL:
RF PORT CONCCTDRS: PC PIhB
DOQGWB:
LENGTH: 0.500 IN
WIDTH: 0.230 IN
HEIGHT: 0.255 IN
REMWS: 8-PIN PACKAGE
CUSTOMSCLASSIFICATION IMEX: 4446
REFERENCE DATA:
N3TES:
OWWESi
TECHNICAL:
TYPE SI2E DR
01 A 09
SUPPLIER DATA;
A) APPROVS) OZ739 MINI H
A
DIVISIONAL USAGE DATA:
DIV KDX 6K)-U5AGE W STD-C
04P1 01 EA 11.S
53P1 16 25 EA 11.9
FC
0955-0237 ER=04
LAST ACTIVITY DATE a 10/30/f
PART STATUS s ft CODE
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Table 4-2. Recommended Test Equipment (I of 5)
Instrument
Signature Multimeter
Oscilloscope
Oscilloscope Probe
Digital Voltmeter (DVM)
Power Meter
Power Sensors
Frequency Counter
Universal Counter
Spectrum Analyzers
Frequency Standard
Synthesized Sweeper (used
as Local Oscillator in P1 and
A1, and Sweep Generator in
A1)
Critical Specifications
Clock Frequency: >.20 MHz
Dual Channel
Bandwidth: dc to 100 MHz
Vertical Sensitivity: s5 mV/Div
Horizontal Sensitivity:
50 ns/Div
10 Magnifier
External Sweep Capability
50 Ohm Vertical Input
10:1 Divider Probe
Range: -50 to +50 Vdc
Accuracy: ±0.01%
Input Impedance: 2:10 MOhms
Power Range: 1^W to 100 mW
Accuracy ±0.02 dB
Frequency Range: 10 to 50 MHz
Power Range: 1 yW to 100mW
Frequency Range: 50 MHz to maximum
Frequency of DUT
Power Range: 1^W to 100 mW
Frequency Range: Same as DUT
Input Impedance: 50 Ohms
Frequency Accuracy:
time Base Accuracy ± 1 count
Time Interval Range: 100 ns to 200 s
Frequency Range:
HP 8340B DUT: 0.01 to 22 GHz
HP 8341 B DUT: 0,01 to 20 GHz
Must have External Time Base Input
Center Frequency Accuracy in 0 Hz Span:
Same as Time Base Accuracy
Minimum Resolution Bandwidth: ^300 Hz
Residual FM: <100Hz -^
Log Fidelity: ^1 dB -^
Must have Video Output
Frequency Range: 20 Hz to 40 MHz
Resolution Bandwidth: :s3 Hz
Frequency. 10 MHz
Stability: >1 xlO-^/yr
Frequency Range: Same as DUT
Must have External Time Base Input
Frequency Accuracy:
Same as Time Base Accuracy
RF Power Output: 2; +4 dBm3
Phase Noise: Must meet or exceed HP
8340B/41B
Line Related Spurious Signals:
Must meet or exceed HP 8340B/41B
Recommended
Model
HP 5005A
HP 1741A
HP10004D
HP 3455A or
HP 3456A
HP436A
Option 022
HP 8481 A
HP 8485A
HP 5343A
Option 011
HP5316A
HP 8566A or
HP 8566B
HP 3585A
HP 5061 A
HP 8340A
Opt. 001
Use1
T
P,A,T
T,A
P,A,T
P,A,T
P,A,T
P.A.T
P,A,T
P,A,T
P,A,T
P,T
P,A
P,A
HP 8340B/41B Performance Tests 4-3

Table 4-2. Recommended Test Equipment (2 of 5)
Instrument
Signal Generator
Desktop Computer
Plotter/Printer ROM
Modulation Analyzer
Pulse Generator
Function Generator
Amplifier
Power Supply
Mixer
Feedthrough Termination
Attenuators
Step Attenuator
Power Splitter
Critical Specifications
Frequency: 300 to 400 MHz
RF Output Power: sO dBm
Settability: to within ±50 kHz
HP 236, 226, and 216 are equivalent to the HP
9836, 9826, and 9816 respectively. Of the three,
the HP 236 (9836) is suggested.
HP 85F includes HP 83936A ROM Drawer, HP
82937A HP-IB Interface, and I/O ROM HP Part
No. 00085-15003.
For HP 85F, no substitute.
No Substitute
Pulse Width: =s100nS
Rise Time: ^10ns
Frequency: 20 Hz to 50 kHz
Sinewave Amplitude: s1 Vrms
Sinewave Frequency: dc to 5 MHz
Frequency Range: 100 kHz to 1.3 GHz
Gain: >20 dB
Frequency Range: 2 to 20 GHz
Gain: 15dB
0 to 50 Vdc
Voltage Drift (in 1 hour): ^ 0.1% +2.5 mV
Frequency Range-1 GHz to maximum frequency
of OUT
50 Ohm feedthrough
Frequency Range: same as DUT
Maximum Input Power: > +20 dBm
Attenuation: 10dB
Connectors: APC-3.54
Frequency Range: same as DUT
Maximum Input Power: > +20 dBm
Attenuation: 20 dB
Connectors: APC-3 5
Frequency Range: DC to 100 MHz
Maximum Input Power: s200 mW avg.
Attenuation 0 to 70 dB, settable in 10 dB steps
Frequency Range: 10 MHz to 26.5 GHz
Maximum input power: s+20 dBm
Input SWR: 2=1.3
Output SWR: £1 22
Output tracking: ^0.25 dB
Recommended
Model
HP 8654A
(orHP8340B/41B)
HP 236
HP 226
HP 216
HP 85F
HP Part No.
00085-10052
HP 8901 A
or HP 8902A
HP8012B
HP 3325A
HP8447F
HP 8349B
HP 6294A
HP Part Number
0955-0307
HP10100C
HP 8493C
Opt. 010
HP 8493C
Opt. 020
HP 355D
HP11667B
Use1
A
HP-IB
HP-IB
P
P,A, T
P,A, T
P
P
P,A
P,A
P
P,A
P,A
P
P
4 Any precision 35 mm adapter may be used in lieu of APC 3 5 This is true for any APC 35 equipped product mentioned in this manual
4.4 Performance Tests HP 8340B/41B

Table 4-2. Recommended Test Equipment (3 of 5)
Instrument
Directional Coupler
Adapters
Adapter Tees
Active Probe
Probe Power Supply
High Pass Filter
(1 each required; use only if
DUT is HP 8340B)
Low Pass Filter
Crystal Detector
Diode (2 required)
Capacitors
Resistor
Critical Specifications
Frequency Range: 1.7 to 26.5 GHz
Coupling: 16dB
Maximum Input Power: 100mW
APC-3.5 (f) to Type N (m)
(2 required for HP 8340B/41B)
(3 required for HP 8341 B with FM)
APC-3.5 (f) to APC-3.5 (f)
(2 required for HP 8340B)
(1 required for HP 8341 B)
APC-3.5 (m) to APC-3.5 (m)
(Only used in instruments equipped with FM
- 2 required)
APC-3.5 (m) to Type N (m)
(1 required for HP 8341 B LO)
SMC (0 to BNC (f)
SMA Male to BNC Female
SMA Female to SMA Female
Type N Male to BNC Female
BNC Female to Dual Banana
SMB (m) to SMB (m)
BNC Male-Female-Female
SMB Male-Male-Male
Input Impedance: 100 KOhms
Output Impedance: 50 Ohms
ForHP1121A
Frequency Range: 18.0to26.5GHz
Connectors: APC-3.5 Female
APC-3.5 Male
Pass 100 MHz and below
Reject 150 MHz and above
Negative
Frequency Range: Same as DUT
Peak Inverse Voltage: 400V
Average Forward Current: 750 mA
1000 pF (± 10%), 100 VDC
0.1 nF(±10%),200VDC
1 MOhm, 1%, 0.5 Watt
Recommended
Model
HP Part No.
0955-0125
1250-1744
5061-5311
1250-1748
1250-1743
1250-0832
1250-1200
1250-1159
1250-1476
1251-2277
1250-0069
1250-0781
1250-06702
HP1121A
HP1122A
HP K281C
HP K281C
Opt. 012
9135-0260
HP 8473C
1901-0028
0160-4574
0160-0168
0757-0059
Use'
A
P,A,T
P,A,T
P,A,T
P,A
P
P,A
P
P
P
A
P
T
T,A
T,A
P
P
P
P, T
P
P
A
A
HP 8340B/41B Performance Tests 4-5

Table 4-2. Recommended Test Equipment (4 of 5)
Instrument
PC Board Extenders
1C Test Clip
Adjustment Tool
Service Cables
Nut Driver
Wrench
Notch Filter
Critical Specifications
24-pin
30-pin
36-pin
44-pin
48-pin
62-pin
110-pin
16-pin
20-pin
Fits adjustment slot on components
BNC (m) to SMB (f) (2 required)
SMA (m) to SMA (m) Semi-Rigid 61mm (a2 ft) 2
required
SMB (f) to SMB (f)
Delay Line — SMA (m) to SMA (m)
2: 1 meter (3 ft)
9/16-inch, to replace front panel BNC nuts
5/16-inch slotted box/open end
At least 35 dB rejection at 1 MHz
Construct as shown below The filter rejection
should be:
S.35 dB at 1 MHz
<26dBat1.01 MHz
Recommended
Model
HP Part No.
08340-600952
08505-600412
08505-600422
08350-600312
08340-600502
08340-600962
08340-600332
1400-07342
1400-09792
8830-00242
85680-600932
08340-201242
5061-10222
08503-200382
08340-200992
08555-200972
Locally Fabricate
Usei
T
T
T
T
T
T
T
T
T
T
T
P,A,T
T
P
T
T
P
4-6 Performance Tests HP 8340B/41B

Table 4-2. Recommended Test Equipment (5 of 5)
J1
1
/ \ ^ f
\T^
$ R1
T 51-
Reference Designator
C1,2
C3,6
C4,7
C5
J1,2
L1.2
L3
R1,2
1 P=Performance Tests, HP-IB=HP-IB Operation Verification Test, A-Adjustments, T=Troubleshooting.
2 These parts are included in Service Kit HP Part Number 08340-60134
3 For best accuracy in the Pulse Modulation Rise and Fall Time and the Amplitude Modulation Performance Tests, the Local Oscillator drive to
the mixer should be £ +4 dBm The HP 8340A/B Option 001, used as the LO will produce +4 dBm at any frequency Any HP 8341A/B will
provide sufficient power at all frequencies, but may be used only with an HP 8341A/B DUT
L3
1.0
C5
.027
'————II————•-T
1 '
3 ioo
CAPACITOR-VAR CER 9-35PF
CAPACITOR-MICA 240PF 300V
CAPACITOR-CERAMIC 10PF
CAPACITOR-PE .027 [iF 200V
CONNECTOR
COIL 100HH 5%
COIL1.0uH5%
RESISTOR 51.1 1%.125W
„ C1 C3
- 9-35pF = : 240pF =
————————l f————————
S LI
R2
51.1
———^———
* Nominal value
Description
RF MALE SMB
C4*
= lOpF 7
3 ioo
100V
„ C2 C6
- 9-35pF == 240pF :
I————————<1————————
1 L2
HP Part
No.
0121-0046
0140-0199
0160-4791
0170-0066
1250-0257
9140-0210
9100-3551
0757-0394
J2
i ^
7
C7*
:: 10pF
Qty.
2
2
2
1
2
2
1
2
HP 8340B/41B Performance Tests 4-7/4-8

4-1. INTERNAL TIME BASE AGING RATE
NOTE
The overall accuracy of the HP 8340B/41B 10 MHz internal time base is a
function of time base calibration ± aging rate ± temperature effects ±
line effects.
For greatest frequency accuracy, the time base should be allowed to
warm up until the output frequency has stabilized (usually 7 to 30 days)
before calibrating (adjusting the time base frequency to a known stan¬
dard). After calibration, the change in time base frequency should
remain within the aging rate if: the time base oven is not allowed to cool
down, the instrument orientation with respect to the earth's magnetic
field is maintained, and the instrument does not sustain any mechanical
shock. Frequency changes due to orientation with respect to the earth's
magnetic field and altitude changes will usually be nullified when the
instrument is returned to its original position. Frequency changes due to
mechanical shock will usually appear as a fixed frequency error.
If the instrument is disconnected from ac power allowing the time base
oven to cool down, it may be necessary to readjust the time base fre¬
quency after a new warmup cycle; however, in most cases, the time base
frequency will return to within ± 1 Hz of the original frequency.
Specification
Table 4-3. Internal Time Base Aging Rate Specifications
Aging Rate;
1x10-9 per day, 2.5x10-7 per year after 72-hour warm up if the instrument has been disconnected
from ac power for less than 24 hours. Aging rate is achieved after 7 to 30 days warm-up if the
instrument has been disconnected from ac power for greater than 24 hours.
Accuracy:
Overall accuracy of internal time base is a function of time base calibration ± aging rate ±
temperature effects ± line effects.
Description
A reference signal from the HP 8340B/41B under test is connected to the oscilloscope's vertical input.
A frequency standard (with long term stability greater than 1x10-10 is connected to the oscilloscope
trigger input. The time required for a specific phase change is measured immediately and after a
period of time. The aging rate is inversely proportional to the absolute value of the difference in the
measured times.
Equipment
Frequency Standard
Oscilloscope1 .....
HP 5061 A
HP1741A
1 A 50 Ohm Feedthrough Termination (such as the HP 10100C) is required when using an oscilloscope without a 50 Ohm input It is not required
with the HP 1741A
HP 8340B/41B Performance Tests 4-9

4-1. INTERNAL TIME BASE AGING RATE (Cont'd)
OSCILLOSCOPE FREQUENCY STANDARD
^
son
FEEDTHROUQH
TERMINATION* •T
OUTPUT
•REQUIRED ONLY FOR OSCILLOSCOPES NOT HAVING
50 OHMS INPUT CAPABILITY
Figure 4-1. Internal Time Base Aging Rate Test Setup
NOTE
Be sure the HP 8340B/41B has been connected to the AC power line for
30 days before beginning this test. If the instrument was disconnected
from the ac power line for less than 24 hours, it only has to be connected
to AC power for 24 hours before proceeding.
Procedure
1. Connect the equipment as shown in Figure 4-1-
2. Adjust the oscilloscope external triggering controls for a stable display of the HP 8340B/41B 10
MHz REF OUTPUT signal.
3. Measure the time required for a phase change of 360 degrees. Record the time (T1) in seconds.
T1 = second(s)
Performance Tests HP 8340B/41B

4-1. INTERNAL TIME BASE AGING RATE (Cont'd)
4. Wait for a period of time (from 3 to 24 hours) and remeasure the phase change time (repeat step
3). Record the period of time between measurements (T2) in hours and the new phase change
time(T3) in seconds.
T2 = ________ hours (h)
T3 = ________ seconds (s)
5. Calculate the aging rate from the following equation:
Aging Rate = (1 cycle/f) (1/T1 - 1/T3) (T/T2)
Where: 1 cycle = the phase change reference for the time measurement. (In this case, 360
degrees)
f = HP 8340B/41 B Time Base output frequency (10 MHz)
T = specified time for aging rate (24 hours)
T1 = initial time measurement (s) for 360 degree (1 cycle change)
T2 = time between measurements (h)
T3 = final time measurement (s) for a 360 degree (1 cycle) change
For example, if:
T1=351s
T2=3h
T3 == 349s
Then:
Aging Rate =(1 cycle/10 MHz) (1/35-ls - 1/349s) (24h/3h)
=1.306x10-11 per day
6. Verify that the aging rate is less than -s per day.
NOTE
If the absolute frequencies of the frequency standard and the HP
8340B/41B Time Base oscillator are extremely close, the measurement
time in steps 3 and 4 (T1 and T3) can be reduced by measuring the time
required for a phase change of less than 360 degrees, change "1 cycle"
in the equation accordingly (i.e., 180 degrees = 1/2 cycle, or 90 degrees
= 1/4 cycle).
7. If the aging rate is not within the required tolerance, be sure sufficient warmup time has been
allowed and that the environmental conditions have not changed throughout the test, then check
the Time Base heater circuit and, if necessary, replace the Time Base. Refer to service and repair
information for the A5110 MHz Reference Oscillator in the Reference Loop — M/N Loop portion
in Section VIII of the Service Manual.
HP 8340B/41B Performance Tests 4-11/4-12

4-2. FREQUENCY RANGE AND CW MODE ACCURACY
Specification
Table 4-4. Frequency Range and CW Mode Accuracy Specifications
Range:
HP 8340B: 0.01 to 26.50 GHz
HP 8341 B: 0.01 to 20.00 GHz
Resolution: n x 1 Hz
Where N = harmonic multiplication number Refer to Frequency Ranges and Bandswitch Points
description in the specifications portion of Section I.
Accuracy: Same as Time Base Accuracy in the specifications portion of Section I.
Description
The HP 8340B/41B RF output is supplied to a frequency counter. The frequency counter internal time
base is used as the reference for the DUT to eliminate time base error from the measurement. The
DUT frequency display and the counter display should agree, within the resolution of each instrument.
This procedure does not test for CW mode accuracy as a function of the time base accuracy.
NOTE
A fault in the DUT could cause the two displays to be different. Any fault
that would cause one of the phase lock loops to be unlocked would be
indicated by a front-panel UNLK indication; however, all HP 8340B/41B
internal phase lock loops could be locked and the DUT output frequency
could be in error (i.e., a phase lock loop frequency divider bit could be
bad). If all the dividers work normally, then CW mode frequency
accuracy is essentially guaranteed.
In the following procedure, the test frequencies are selected first to test the maximum frequency
range and then to exercise each frequency related circuit throughout its CW range while holding all
remaining circuits constant. The test frequencies are grouped so that an abnormal Indication would
point to the circuit most likely causing the problem.
Equipment
Frequency Counter .................................... HP 5343A Option 011
Adapters
SMA (m) to BNC (f) .................................... HP P/N 1250-1200
APC 3.5 (f) to APC 3.5 (f) ................................ HP P/N 5061-5311
(2 required if DUT is HP 8340B)
(1 required if DUT is HP 8341 B)
Type N (m) to APC 3.5 (f) ................................ HP P/N 1250-1744
(1 required if DUT is HP 8341 B)
Cable (Semi-Rigid SMA male to SMA male) ................. HP P/N 08340-20124
HP 8340B/41B Performance Tests 4-13

4-2. FREQUENCY RANGE AND CW MODE ACCURACY (Cont'd)
Procedure
1. Connect the equipment as shown in Figure 4-2. Connect the DUT RF Output to the 10 MHz-500
MHz counter input. Allow the equipment to warm up for one hour. The DUT and the Frequency
Counter use the same frequency standard to eliminate time base error from the measurement.
Set the HP 8340B/41B rear panel FREQUENCY STANDARD switch to EXT.
HP S340B/41B
UNDER TEST FREQUENCY
COUNTER
500MHz-
27QHZ
ADAPTER
APC 3.5 (f)
APC 3.5(f) TO
SEMI-RIQIO CABLE
2.
Figure 4-2. Frequency Range Test Setup
Press HP 8340B/41B [INSTR PRESET], then [CW] and enter [1] [0] [MHz]. Press [POWER
LEVEL] and enter [+] [1] [0] [dBm]. the counter should indicate 10 MHz ± 1 Hz ± the resolution
of the counter.
3. Check the high frequency endpoint.
FOR HP 8340B
Connect the HP 8340B RF output to the 500 MHz-26.5 GHz counter input. Press the HP 8340B
[CW] key and enter [2] [6] [.] [5] [GHz]. Press [POWER LEVEL] [0] [dBm]. The counter should
indicate 26.5 GHz ±4 Hz ± the resolution of the counter.
FOR HP 8341 B
Connect the HP 8341 B RF output to the 500 MHz-26.5 GHz counter input. Press the HP 8341 B
[CW] key and enter [2] [0] [GHz]. Press [POWER LEVEL] [0] [dBm]. The counter should indicate
20.0 GHz ±3 Hz ± the resolution of the counter.
NOTE
Since the same time base is used for both the HP 8340B/41B and the
frequency counter, only the displayed frequency is checked. The actual
frequency error is ± (DUT output frequency/10 MHz) X time base error ±
4 Hz (HP 8340B) or 3 Hz (HP 8341B).
4. Check the M/N M Divider frequencies as follows:
Performance Tests HP 8340B/41B

4-2. FREQUENCY RANGE AND CW MODE ACCURACY (Cont'd)
NOTE
Pressing [SHIFT] [M1] displays, from left to right, the:
M divide number,
N divide number,
M/N Loop output frequency,
20/30 Loop output frequency.
Press [SHIFT] [M5] to exit this diagnostic mode. The instrument con¬
tinues to operate normally while in the diagnostic mode.
a. Press [CW] key and enter [2] [4] [9] [0] [MHz]. Select a step size of 10 MHz by pressing
[SHIFT] [CF] [1] [0] [MHz], Press [SHIFT] [M1] to display, from left to right, the M divide
number, the N divide number, the M/N Loop output frequency, and the 20/30 Loop output
frequency. Press the [CW] key to display the CW frequency in the [ENTRY DISPLAY].
b. Using the down arrow key, step down to 2 300.000000 MHz. Check the counter indication at
each step. The counter should indicate the HP 8340B/41 B frequency ± 1 Hz ± the resolution
of the counter at each step.
NOTE
The above step sets and holds the N Divider to 13 and programs the M
Divider through its full range of 8 to 27. Any frequency error as a result of
a problem in the M Divider will probably be a multiple of 10 MHz.
c. If a significant frequency error is evident, note the conditions under which the error occurred
and continue this procedure to determine if any other conditions produce an error.
5. Check the M/N N Divider frequencies as follows:
a. Select a step size of 200 MHz by pressing [SHIFT] [CF] [2] [0] [0] [MHz]. Press [CW] to
display the CW frequency in the [ENTRY DISPLAY]. The CW frequency should be 2
300.000000 MHz.
b. Using the up arrow key, step to 6 900.000000 MHz. Check the counter indication at each step.
The counter should indicate the HP 8340B/41 B frequency ± 1 Hz ± the resolution of the
counter.
NOTE
The above step sets and holds the M Divider to 27 and programs the N
Divider through its full range of 13 to 36. Any frequency error as a result
of a problem in the M Divider will probably be a multiple of 10 MHz.
c. If a significant frequency error is evident, note the conditions under which the error occurred
and continue this procedure to determine if any other conditions produce an error.
6. Check the 20/30 MHz N2 loop frequencies as follows:
a. Press [INSTR PRESET]. Press[CF] key and enter [2] [3] [1] [0] [.] [5] [MHz]. Press the [AF]
key and enter [1] [MHz]. Select a step size of 1 kHz by pressing [SHIFT] [CF] [1] [kHz].
b. Press [SINGLE] sweep key to set the DUT to be phase-locked at the start of sweep (2.310
GHz]. Press [SHIFT] [M1] to enter the diagnostic display mode. Press [CF] to display the
center frequency in the [ENTRY DISPLAY]. The center frequency should be 2.310500 GHz.
HP 8340B/41B Performance Tests 4.15