Agilent E8257D
Option HAR
User’s and Service Guide
Agilent Technologies
Notices
© Agilent Technologies, Inc. 2007
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Manual Part Number
E8251-90319
Edition
October 2007
Printed in USA
Agilent Technologies, Inc.
1601 California Street
Palo Alto, CA 94304 USA
Warranty
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Safety Notices
CAUTION
A CAUTION notice denotes a hazard. It calls attention to an operating procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.
WARNING
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly performed or adhered to, could result
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proceed beyond a WARNING
notice until the indicated conditions are fully understood and met.
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Safety Notes
The following safety notes are used throughout this document. Familiarize yourself with
each of these notes and its meaning before performing any of the procedures in this
document.
WAR NING
CAUTION
Warning denotes a hazard. It calls attention to a procedure which,
if not correctly performed or adhered to, could result in injury or
loss of life. Do not proceed beyond a warning note until the
indicated conditions are fully understood and met.
Caution denotes a hazard. It calls attention to a procedure that, if not
correctly performed or adhered to, could result in damage to or destruction
of the instrument. Do not proceed beyond a caution sign until the indicated
conditions are fully understood and met.
Definitions
• Specifications describe the performance of parameters covered by the product warranty
(temperature –0 to 55 °C, unless otherwise noted.)
• Typical describes additional product performance information that is not covered by the
product warranty. It is performance beyond specification that 80% of the units exhibit
with a 95% confidence level over the temperature range 20 to 30 °C. Typical
performance does not include measurement uncertainty.
• Nominal values indicate expected performance or describe product performance that is
useful in the application of the product, but is not covered by the product warranty.
• Characteristic Performance describes performance parameter that the product is
expected to meet before it leaves the factory, but is not verified in the field and is not
covered by the product warranty. A characteristic includes the same guard bands as a
specification.
iii
iv
Contents
E8257D Option HAR
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Verifying the Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Phase Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Maximum Level Output Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Typical Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Phase Noise . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Amplitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Modulation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Frequency Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Phase Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Amplitude Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Pulse Modulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
ALC Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Ramp Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
E8257D Option HAR Using the E5500 Phase Noise Measurement Subsystem . . . . . . . . . 8
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Replaceable Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Performance Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Setting up the E5500 Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
10 MHz Phase Noise Test Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
10 MHz Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Making the 10 MHz Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
100 MHz Phase Noise Test Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
100 MHz Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Making the 100 MHz Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Modifying Synthesizer Self Test Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Safety and Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Cleaning the Instrument . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connector Care and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Statement of Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Shipping Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Compliance with Canadian EMC Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Compliance with German FTZ Emissions Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Compliance with German Noise Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
General Safety Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Safety Earth Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Before Applying Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Electrostatic Discharge Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Regulatory Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Instrument Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Contacting Agilent Sales and Service Offices. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Contents-1
Contents
Contents-2
E8257D Option HAR
User’s and Service Guide 1
E8257D Option HAR Description
Description
The E8257D Option HAR is a frequency divider designed to provide improved phase noise
in the 0.98 MHz to 500 MHz frequency range of the E8257D Signal Generator.
The Option HAR uses frequency division as a replacement for heterodyne mixing to create
frequencies in the 0.98 to 500 MHz range. This provides improved phase noise in this
mode. The mode will be referred to as “Divider Mode” throughout this document.
Verifying the Shipment
After the unit has been unpacked, keep the original packaging materials so it can be
used if you need to transport the instrument.
After the test set has been unpacked, keep the original packaging materials so they can be
used if you need to transport the instrument.Inspect the test set and all accessories for any
signs of damage that may have occurred during shipment. If your test set or any
accessories appear to be damaged or missing refer to “Contacting Agilent Sales and Service
Offices” on page 26.
Block Diagram
Figure 1 Block Diagram
P1 P2 P4
p/o Frac N board
N
/ 2
/ 2NRamp Swp
0.25-3.2
GHz
Divider assembly
1
2
N
/ 2
Output Board
N
/ 2
From ALC
board
ALC
TC226
ALC
Scan
Digital Control
1GHz from
Ref board
1 - 250 MHz
1
2
Opt 1EH
Filters
P3
2 User’s and Service Guide
E8257D Option HAR Specifications
Specifications
The E8257D Option HAR provides improved absolute phase noise in the 0.98 to 500 MHz
frequency range. To achieve these improvements the Divider Mode must be turned On.
See “Operation” on page 8.
The E8257D Option HAR impacts standard instrument performance for frequencies
≤ 3.2 GHz. Standard operation for frequencies above 3.2 GHz has not been affected. If
Divider Mode is left on for frequencies outside of 0.98 to 500 MHz the “ALC Bandwidth”
will be limited to 100 Hz.
Phase Noise
Divider Mode On
Tabl e 1
Frequency 1 Hz 10 Hz 100 Hz 1 kHz 10 kHz 100 kHz
10 MHz −93 −120 −142 −152 −158 −158
100 MHz −73 −100 −122 −140 −145 −145
1. +16 dBm
E8257D Option HAR Specifications1 (25 °C)
Divider Mode Off
Standard performance per the E8257D data sheet.
Maximum Level Output Power
Divider Mode On
Typical performance see Table 4 and Table 5 on page 5.
Divider Mode Off
Table 2 Maximum Power Specification Impacts
Frequency Delta
250 kHz to 3.2 GHz −3 dB from Standard specification
> 3.2 GHz no change from standard specifications
User’s and Service Guide 3
E8257D Option HAR Typical Performance
Typical Performance
Phase Noise
Table 3 Absolute Single Sideband Phase Noise (dBc/Hz) Frequency Offset
from Carrier
1
(Typical)
2
Carrier
Frequency (MHz)
1 MHz −120 −142 −155 −160 −160 −160
10 MHz −106 −132 −148 −160 −160 −160
100 MHz −86 −112 −129 −144 −149 −149
160 MHz −81 −107 −122 −142 −145 −145
250 MHz −76 −104 −121 −138 −142 −142
500 MHz −70 −98 −115 −132 −136 −136
1. +16 dBm
Divider Mode On.
2.
1 Hz 10 Hz 100 Hz 1 kHz 10 kHz 100 kHz
Amplitude
Table 4 Option 520 Maximum Leveled Output Power1 dBm
Carrier
Frequency
1 MHz 19 19
10 MHz 19 13
100 MHz 17 11
160 MHz 17 11
250 MHz 17 10
500 MHz 16 10
Lowband Filter
Off
On
4
2
(Typical)
3
1.Amplitude accuracy is not specified in diver mode.
2.Divider Mode On.
3.Option 1EA installed. Divider mode on, without Option IEA max power is
the lower of 10 dBm, or refer to Tabl e 4.
4.For improved amplitude accuracy the lowband filters must be on.
4 User’s and Service Guide
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