............................................ Certified Process
All technical data and specifications in this manual are subject to change without prior notice and do not represent a
commitment on the part of Giga-tronics Incorporated.
Giga-tronics Series 8035XA Peak Power Sensors
are warranted against defective materials and
workmanship for one years from date of shipment.
Giga-tronics will at its option repair or replace
products that are proven defective during the
warranty period. This warranty DOES NOT cover
damage resulting from improper use, nor
workmanship other than Giga-tronics service.
There is no implied warranty of fitness for a
particular purpose, nor is Giga-tronics liable for any
consequential damages. Specification and price
change privileges are reserved by Giga-tronics.
I, the undersigned, hereby declare that the equipment specified above
conforms to the above Directive(s) and Standard(s)
(Signature)
Thomas A. Kramer
(Full Name)
Director of Quality Assurance
(Position)
80350A, 80351A, 80352A, 80353A, 80354A, 80355A
San Ramon, California
(Place)
December 21, 1998
(Date)
About This Manual
About This Manual
About This ManualAbout This Manual
This manual contains the following chapters and appendices to describe the operation and maintenance
of Giga-tronics Series 8035XA Peak Power Sensors:
Preface:
In addition to a comprehensive Table of Contents and general information about the manual, the
Preface also contains a record of changes made to the manual since its publication, and a description
of Special Configurations. If you have ordered a user-specific manual, please refer to page vii for a
description of the special configuration.
Chapter 1 – Introduction:
This chapter contains a brief introduction to the instrument and its performance parameters.
Chapter 2 – Operation:
This chapter is a guide to operating the sensor with the Series 8540X Universal Power Meters and the
Model 58542 VXIbus Universal Power Meters.
Chapter 3 – Theory of Operation:
This chapter provides a block diagram level description and its circuits for maintenance and
applications.
Chapter 4 – Calibration & Testing:
Procedures for inspection, calibration and performance testing are outlined in this chapter.
Chapter 5 – Maintenance:
This chapter contains procedures for maintenance and troubleshooting.
Chapter 6 – Parts Lists:
This chapter lists all components and parts and their sources.
Chapter 7 – Diagrams:
This chapter contains schematics and parts placement diagrams for all circuits.
Index:
A comprehensive word index of the various elements of the 8035XA manual.
Changes that occur after publication of the manual, and Special Configuration data will be inserted as
loose pages in the manual binder. Please insert and/or replace the indicated pages as detailed in the
Technical Publication Change Instructions included with new and replacement pages.
Manual 21568, Rev. D, February 2001i
Series 8035XA Peak Power Sensors
Index:
A comprehensive word index of the various elements of the 8035XA manual.
Changes that occur after publication of the manual, and Special Configuration data will be inserted as
loose pages in the manual binder. Please insert and/or replace the indicated pages as detailed in the
Technical Publication Change Instructions included with new and replacement pages.
iiManual 21568, Rev. D, February 2001
Conventions
Conventions
ConventionsConventions
The following conventions are used in this product manual. Additional conventions not included here
will be defined at the time of usage.
Warning
WARNING
The WARNING statement is encased in gray and centered in the
page. This calls attention to a situation, or an operating or
maintenance procedure, or practice, which if not strictly corrected
or observed, could result in injury or death of personnel. An
example is the proximity of high voltage.
Caution
CAUTION
The CAUTION statement is enclosed with single lines and centered
in the page. This calls attention to a situation, or an operating or
maintenance procedure, or practice, which if not strictly corrected
or observed, could result in temporary or permanent damage to the
equipment, or loss of effectiveness.
Notes
☛
☛
☛☛
Logic Not
A logic NOT or LOW condition used in text will be indicated by an overscore, such as LOAD-CTR.
Elsewhere, such as in schematics, a logic NOT or LOW condition may be indicated by a forward slash
bar, such as /LOAD-CTR.
Key Press Commands
Commands requiring specific keys to be pressed on the supporting device, such as power meter, are
indicated by square brackets. For example, [ENTER] means to press the Enter Key.
NOTE: A NOTE Highlights or amplifies an essential operating or maintenance procedure,
practice, condition or statement.
Manual 21568, Rev. D, February 2001iii
Series 8035XA Peak Power Sensors
ivManual 21568, Rev. D, February 2001
Record of Manual Changes
Record of Manual Changes
Record of Manual ChangesRecord of Manual Changes
This table is provided for your convenience to maintain a permanent record of manual change data.
Corrected replacement pages will be issued as Technical Publication Change Instructions, and will be
inserted at the front of the binder. Remove the corresponding old pages, insert the new pages, and
record the changes here.
Change
Instruction
Number
Change
Instruction
Date
Date
EnteredComments
Manual 21568, Rev. D, February 2001v
Series 8035XA Peak Power Sensors
viManual 21568, Rev. D, February 2001
Special Configurations
Special Configurations
Special ConfigurationsSpecial Configurations
When the accompanying product has been configured for user-specific application(s), supplemental
pages will be inserted at the front of the manual binder. Remove the indicated page(s) and replace it
(them) with the furnished Special Configuration supplemental page(s).
Manual 21568, Rev. D, February 2001vii
Series 8035XA Peak Power Sensors
viiiManual 21568, Rev. D, February 2001
1.1Description
The 8035XA Series Peak Power Sensors perform true sample-based peak power measurements on pulsed
signals. The sensors are compatible with Giga-tronics Series 8540 Universal Power Meters and the
Model 58542 VXIbus Universal Power Meter (see Section 1.2.2). The sensors operate from 45 MHz to
18, 26.5, and 40 GHz. High power versions of 5, 25 and 50 Watts, are available to 18 GHz
(see Table 1-1).
Peak Power sensors have three modes of operation: (1) CW, (2) Peak, internally triggered, and
(3) Peak, externally triggered. When operated in the peak modes, trigger-point to sample-point delay
(sample delay) is adjustable from -20 ns to 100 ms in 0.5 ns steps. Trigger levels are also adjustable.
The Giga-tronics proprietary power sweep calibration system provides excellent linearity from -20 dBm
to +20 dBm in Peak modes, and from -30 dBm to +20 dBm in CW mode. Cal Factors stored in
EEPROMs in the power sensors automatically compensate for sensor frequency response variations. This
unique approach can be configured for automatic frequency response correction. A detector output
signal is provided for viewing the detected envelope of the pulsed RF waveform on an oscilloscope. Use
of a digital oscilloscope is recommended.
1
1
11
Introduction
1.1.1Accessories
Included:3 each SMB (plug) to BNC (m) cables, 2 m (6 ft) long
3 each Cable Harness Wraps, 1.2 m (4 ft) long
Optional:Option 02: 12 ft SMB (plug) to BNC cable
Option 03: SMB (plug) to SMA (jack) adapter
1.1.2Product Returns
Should it be necessary to return the product to Giga-tronics, use the original shipping container. If this
is not possible, use a strong carton (350 lbs/in
instrument in heavy paper or plastic before placing it in the shipping container. Completely fill the
areas on all sides of the instrument with packaging material, taking extra precautions to protect the
front and rear panels. Seal the package with strong tape or metal bands. Mark the outside of the package
“FRAGILE — DELICATE INSTRUMENT”.
If corresponding with the factory or the local Giga-tronics sales office regarding a product return, please
refer to the full model number and serial number. If the instrument is being shipped for repair, be sure to
enclose all available pertinent data regarding the problem that has been found.
☛
NOTE:
Service so that a return authorization number (RMA) can be assigned via e-mail at
repairs@gigatronics.com or at 800.444.2878 (The 800 number is only valid within the US).
You may also try our domestic line at 925.328.4650 or Fax at 925.328.4702.
If you are returning an instrument to Giga-tronics for service, first contact Customer
2
bursting strength), or a wooden box. Wrap the
Manual 21568, Rev. D, February 20011-1
Series 8035XA Peak Power Sensors
1.2Specifications
Table 1-1: Peak Power Sensor Selection Guide
Model
8035XA
80353A
80354A
80351A
80352A
Freq. Range/
Power Rang e
45 MHz to 18 GHz
-20 to +20 dBm, Peak
-30 to +20 dBm, CW
45 MHz to 26.5 GHz
-20 to +20 dBm, Peak
-30 to +20 dBm, CW
45 MHz to 40 GHz
-20 to +0.0 dBm, Peak
-30 to +0.0 dBm, CW
45 MHz to 18 GHz
0.0 to +40 dBm, Peak
-10 to +37 dBm, CW
45 MHz to 18 GHz
+10 to +50 dBm, Peak
0.0 to +44 dBm, CW
Max.
Power
+23 dB m
(200 mW)
CW or Peak
CW:
+37 dB m
(5 W Avg.)
Peak:
+43 dB m
CW:
+44 dB m
(25 W Avg.)
Peak:
+53 dB m
Power Li ne ar it y
Standard Peak Pow er Sens ors
-30 to -20 dBm ±0.00 dB
-20 to +20 dBm ±0.05 dB/10 dB
-30 to -20 dBm ±0.00 dB
-20 to +20 dBm ±0.1 dB/10 dB
-30 to -20 dBm ±0.00 dB
-20 to 0.0 dBm ±0.2 dB/10dB
5W Pe ak Power Sens or
-10 to +0 dBm ±0.00 dB
+0 to +40 dBm ±0.05 dB/10 dB
25W Peak Power Sensor
0.0 to +10 dBm ±0.00 dB
+10 to +50 dBm ±0.05 dB/10 dB
50W Peak Power Sensor
4
RF
Conn
Type N(m)
50Ω
Type K(m)
50Ω
2,5
Type N(m)
50Ω
3,5
Type N(m)
50Ω
3,5
Dimensions
Ln.Dia.
165 mm
(6.5 in)
1
200 mm
(7.9 in)
280 mm
(11.0
in)
37 mm
1.25 in)
37 mm
(1.25 in)
104 mm
(4.1 in)
WgtVSWR
1.12:0.045 - 2 GHz
1.22:2 - 12.4 GHz
1.37:12.4 -18 GHz
1.12:0.045 - 2 GHz
1.22:2 - 12.4 GHz
0.3 kg
1.37:12.4 -18 GHz
(0.7 lb)
1.50:18 - 26.5 GHz
1.12:0.045 - 2 GHz
1.22:2 - 12.4 GHz
1.37:12.4 -18 GHz
1.50:18 - 26.5 GHz
1.92:26.5 - 40 GHz
1.15:0.045 - 4 GHz
0.3 kg
1.25:4 - 12.4 GHz
(0.7 lb)
1.35:12.4 -18 GHz
1.20:0.045 - 6 GHz
0.3 kg
1.30:6 - 12.4 GHz
(0.7 lb)
1.40:12.4 -18 GHz
CW:
+47 dB m
(50 W Avg.)
Peak:
+53 dB m
0.0 to +10 dBm ±0.00 dB
+10 to +50 dBm ±0.05 dB/10 dB
80355A
45 MHz to 18 GHz
+10 to +50 dBm, Peak
0.0 to +47 dBm, CW
Notes:
1.The K connector is electrically and mechanically compatible with the APC-3.5 and SMA connectors.
2.Power coefficient equals <0.01 dB/Watt (AVG).
3.Power coefficient equals <0.015 dB/Watt (AVG).
4.For frequencies above 8 GHz, add power linearity to system linearity.
5.Peak operating range above CW maximum range is limited to <10% duty cycle.
1.2.1Performance Specifications
Performance specifications describe warranted performance. Typical performance shown in italics is
non-warranted. Specifications are subject to change without notice.
Rise-Time(10% to 90%, 0 dBm = 100%) < 100 ns
Fall Time(90% to 10%, 0 dBm = 100%) < 250 ns
System Linearity(50 MHz for Standard Peak Power Sensors:)
±
0.13 dB from -30 to +16 dBm
±
0.13 dB +(+0 dB, -0.05 dB/dB) from +16 to +20 dBm
Type N(m)
50Ω
280 mm
(11.0
in)
104 mm
(4.1 in)
0.3 kg
(0.7 lb)
1.25:0.045 - 6 GHz
1.35:6 - 12.4 GHz
1.45:12.4 -18 GHz
1-2Manual 21568, Rev. D, February 2001
Zero Accuracy
Zero Set:<
Zero Drift:<
Noise Uncertainty:<
Sample Delay Timing
Delay Range:-20 ns to 104 ms
Delay Resolution:0.5 ns
Delay Jitter:
Trigger Level Set Range:
Internal:-30 to +20 dBm
Resolution:
Applies to 80350A, 80353A and 80354; 80351A = 100x larger,
80352A = 1000x larger
±
1.0µW, Peak;
<±0.05µW, CW
±
1.0µW, Peak
±
0.05µW, CW
<
in 1 hour at constant temperature, 24 hour warmup
±
1.0µW, Peak;
±
0.05µW, CW at constant temperature, measured over a 1
<
minute interval, 24 hour warmup
±
2.0 ns
±
0.01 dB
External:0.0V to 4.0V
Trigger Jitter:<
Settling Time:(50% to within 3%) < 250 ns
Control Inputs and Outputs
Trigger Input:[SMB (jack) connector]
Detector Out:[SMB (jack) connector]
Sample Delay:[SMB (jack) connector]
Resolution to 0.01V
±
2.0 ns
TTL External Trigger Input (absolute maximum = 10 V)
Ω
Impedance.
110 k
Monitor real time pulse waveform on an oscilloscope with this
voltage output (uncalibrated)
(High Impedance - Do Not Terminate)
High, 5 V, between trigger and sample points. Connect to digital
oscilloscope channel 2 for triggering and sample point
identification
(High Impedance - Do Not Terminate)
Maximum cable length = 3 meters
Manual 21568, Rev. D, February 20011-3
Series 8035XA Peak Power Sensors
Table 1-2: Power Sensor Cal Factor Uncertainties
Probable Uncertainties
3
8035XA
(%)
80353A
80354A
2
80351A
80352A
80355A
80352A
1
3
80355A
Freq. (GHz)Sum of Uncertainties (%)
LowerUpper8035XA
0.111.613.069.099.5110.161.041.644.92
121.953.519.439.8510.501.201.735.04
242.444.4213.1013.5714.521.331.937.09
462.674.7413.3313.8014.751.412.037.17
682.864.9413.5213.9914.941.522.087.25
812.43.596.0414.2514.7215.671.922.557.56
12.4184.096.8619.5220.9721.942.112.8312.37
18 26.5——9.27————————3.63——
26.540——15.19————————6.05——
80353A
80354A
80351A
3
Notes:
1.Includes uncertainty of reference standard and transfer uncertainty. Directly traceable to NIST.
2.Square root of sum of the individual uncertainties squared (RSS).
3.Cal Factor numbers allow for 3% repeatability when connecting attenuator to sensor, and 3% for attenuator measurement
uncertainty and mismatch of sensor/pad combination. Attenuator frequency response is added to the Sensor Cal Factors
which are stored in the sensor’s EEPROM.
3
3
3
1.2.2Compatible Power Meters
8541X Single Channel Universal Power Meter
8542X Dual Channel Universal Power Meter
58542 Dual Channel VXI Universal Power Meter
NOTE: If the Series 8035XA sensors will be used with a Model 8542 (dual channel) Power
☛
Meter, the 8542 must be configured to code 06 or higher, or an asterisk (*) must be appended
to the code number. The code number is printed next to the serial number on the label
located on the rear panel of the 8542.
1-4Manual 21568, Rev. D, February 2001
2.1Introduction
When a sensor is first connected to a Model 8541 or 8542 Universal Power Meter or to a Model 58542
VXIbus Universal Power Meter, it is necessary to calibrate the sensor to the meter’s sensor input, using
the meter’s power sweep calibration system. The power meter will not allow measurements to be
performed until this calibration is completed successfully. It is a good practice to repeat the calibration
whenever the ambient operating temperature of the sensor varies by more than
whenever any external connections or external loads are added or removed from the sensor. Always
allow a 30 minute warm-up period before calibrating the sensor.
2
Operation
±
5 °C (±9 °F), and
☛☛☛☛
The operational description of the 8035XA Peak Power Sensor applies to applications with either the
Series 8540 Universal Power Meters (8541/2, B and C) or the Model 58542 VXIbus Universal Power
Meter. Except where noted, the front panel descriptions apply only to the Series 8540 Power Meters,
and SCPI command sequences apply to the Model 58542 VXIbus Power Meter.
NOTE:
[ ] and menu displays in bold print.
These instructions show the Series 8540 Power Meter front panel keys in brackets
2.2Power Sweep Calibration
Procedures for calibrating sensors to the meter are detailed in the specific power meter manual. The
8035XA Peak Power Sensors are calibrated to the meter using the same procedure as other sensors used
with the 8541/2 Power Meters or the 58542 VXI Power Meter. Connect the channel A sensor to the
calibrator port, and press [ZERO/CAL].
Following the successful completion of Power Sweep Calibration, the 8541/2 will automatically display
the current value of sample delay for your 8035XA Series Peak Power Sensor. If the sample delay does
not appear, press [RECALL], select PRESET, and press [ENTER].
If you are using the dual channel 8542 Universal Power Meter, verify that only one 8035XA Series Peak
Power Sensor is connected. The 8542 will automatically display peak power on one line and sample
delay on the other. When two sensors are attached, the display will default to display the two power
levels. Some test procedures, such as A/B ratio measurements, will be easier after performing some
configuration of the display parameters. Press [MENU], select A, B, A/B . . . B-A with the arrow
keys, and press [ENTER]. This menu will allow you to select various power measurements as well as
and DLYB for the two line display.
DLY
A
Manual 21568, Rev. D, February 20012-1
Series 8035XA Peak Power Sensors
2.2.15, 25 and 50 Watt Peak Power Sensors
Power Sweep Calibration of the 5, 25 and 50 W Peak Power Sensors (80351A, 80352A and 80355A,
respectively) require you to disconnect the high power attenuator before you connect the sensor directly
to the front panel calibrator connector. When power sweep calibration is completed, reconnect the
high power attenuator to the sensor.
Proper connector alignment is shown by small black arrows printed on the attenuator and sensor labels.
The serial number on the sensor housing and the serial number on the high power attenuator should
match. During manufacture, the frequency response of the attenuator is calibrated and entered into the
peak power sensor EEPROM as frequency calibration factors. This technique improves the accuracy and
repeatability of your measurements.
CAUTION
Do not exceed 200 mW (+23 dBm) Peak or Average. Excessive input power will damage or destroy the power sensor element.
SET UP
PEAKSNSRSETUP
PEAKSENSOR
A
SETTRIGMODEA
CWINTEXT
SETTRIGLEVELA
xx.xxdBm
To default display
B
Not shown if only one sensor is attached
or if the power meter is single- channel (8541)
SETTRIGLEVELA
x.xxxV
SETSAMPDLYA
xxxx.xnS
DLYOFFSETA
xxxx.xnS
Figure 2-1: Sensor Setup Menu Tree
2-2Manual 21568, Rev. D, February 2001
2.2.2Triggering
The 8540 power meters will not display a new peak power reading until the 8035XA sensor is triggered.
The default configuration is internal triggering (INT) at -20 dBm. Press [MENU], select SETUP MENU, select PEAK SNSR SETUP, (select sensor A or B if necessary), and then select INT
triggering. You can then enter a new internal trigger level. Be sure that the value is 3 dB or greater
below the peak power level of the signal being measured. If you are attempting to trigger at excessively
low power levels, measurement repeatability and noise performance can be improved by using external
(EXT) triggering.
INT Trigger Level
Operation
Amplitude Profile of
Meaured Signal.
2.2.3Zeroing
Zero the sensor before taking critical measurements in the bottom 10 dB of the peak power sensor’s
dynamic range. For standard peak power sensors, this level is -10 dBm.
When making dual channel power measurements, zero the sensors whenever another sensor is attached
or disconnected. Use the following steps:
1.Turn off the RF source.
2.Press [CAL/ZERO].
The sensors will zero automatically. The 8540 power meters detect when a sensor is attached to the
calibrator port. When a sensor is not attached to the power sweep calibrator, the power meter
automatically initiates the zeroing procedure (if only one sensor is connected to the meter). Be sure to
deactivate the RF source for zeroing. Leaving the sensor attached to your measurement test ports during
zeroing properly accounts for test setup ground noise and metal to metal contact thermal EMF.
The 8035XA Series EXT trigger port is on the back of the sensor, not the power meter. A set of three
SMB(f) to BNC(m) cables are included with each 8035XA Series sensor. The EXT trigger input
impedance is 110 k
However, the input impedance match might cause triggering line reflections and potential false
triggering when fast (50
Figure 2-2: Internal Triggering Levels
Ω
. This allows you to use TTL level signals without damaging the input circuit.
Ω
) trigger sources are used.
This can be resolved by setting the EXT trigger level (see Figure 2-1).
The CW power measurement mode is also selected in the Peak Sensor Setup menu. CW measurements
are automatically performed on a continuous basis.
Manual 21568, Rev. D, February 20012-3
Series 8035XA Peak Power Sensors
Sample Delay Pulse
Trigger Level
(Int. or Ext.)
58542 VXIbus Power Meter SCPI Compatible Commands
OUTPUT @Pwr_MTR;SENS1:TRIG:SOUR INT
OUTPUT @Pwr_mtr, SENS1: TRIG: DEL 10E-06
WAIT 200
OUTPUT @Pwr_mtr, MEAS1?
ENTER @Pwr_mtr: Peak_pwr_rdg
Figure 2-3: 8035XA Sensor Timing Diagram
2.2.4Sensor Triggering
A measurement will not be possible until the peak power sensor is triggered. The Series 8540 Power
Meters will display
technique is valid for both Series 8540 and 58542 VXI Power Meters:
NO TRIG
10 sµ
RF
Delay
This is a pproximately 0.0 ns delay.
A built in delay line provides at least
20 ns look-ahead capability.
! Selects Internal Triggering
! Sets Sample Delay Position to 10 s
! Wait 200 ms for Sample Time Set
! Take a Measurement
Envelope
µ
until a valid trigger is received. The following trigger verification
1.If you need to verify triggering, connect the Sample Delay output on the back of the 8035XA
Series sensor to an oscilloscope using one of the SMB(plug) to BNC(m) cables provided with
µ
the sensor. Set the scope channel to dc coupling, 1.0
triggering at about 0.5 V trigger level. Set the sensor sample delay to 2.0
s per division. Use rising edge (Normal)
µ
s.
2.The sample delay pulse will appear each time the sensor is triggered. If a pulse does not appear
on the scope display, the sensor is not triggering. Check the triggering configuration and adjust
it if necessary. An analog oscilloscope may show a dim trace when the repetition rate is low.
3.A quick check that can be made on the 8540 power meter for triggering without using an
oscilloscope is to press [dB/mW] twice. This will clear the current reading and display
until a valid trigger is received.
TRIG
NO
2-4Manual 21568, Rev. D, February 2001
2.3Sample Delay
Sample Delay is the time value in nano-, micro-, or milliseconds that appears on the Series 8540 display
after an 8035XA Series sensor has been calibrated. This is the length of time between the trigger point
and the sample point on the pulsed signal. This capability allows you to measure the power level of your
pulsed signal at any time point along its amplitude path. The power level displayed is the true, sampled
signal level at the time position that you specified; the pulse level is not interpolated from two adjacent
samples as is common in random sampling oscilloscope-type peak power meters.
Sample delay is fully adjustable from -20 ns to 100 ms. On the 8541/2 front panel, use the arrow keys to
position the cursor and adjust the time values. Seven digits, four to the left of the decimal and three to
the right of the decimal, can be edited in the microsecond (ns) and millisecond (ms) ranges
(see Figure 2-4 for an example.) The nanosecond range allows four digits to the left of the decimal, but
only a .0 or .5 to the right of the decimal.
The 0.0 ns time delay setting will be close to the trigger level when internal triggering is used. If your
measurements require definition of the 0.0 ns position, use Sample Delay Offset to adjust for small
triggering variations.
Operation
Figure 2-4: Sample Delay Adjustment Display
Full 0.5 ns resolution is always possible regardless of the front panel units display. On the millisecond
ranges, small nanosecond level increments in sample delay can be performed by incrementing Sample Dly Offset in the Peak Sensor Setup menu tree. In addition to allowing control of small nanosecond
range sample delay increments while currently displaying millisecond ranges, sample delay offsets allow
you to compensate for cabling and circuit time delays in your test setup. The sensor delay is the sum of
and DLY OFFSETA (or DLYB and DLY OFFSETB)
DLY
A
2.3.1Sample Delay Display
With a single peak power sensor attached, the default display after attachment and calibration of the
sensor will have the power displayed on one line and the sample delay displayed on the other line. The
default for channel A will be as shown in Figure 2-5.
Figure 2-5: Channel A Default Sample Delay
Manual 21568, Rev. D, February 20012-5
Series 8035XA Peak Power Sensors
The default for channel B will be as shown in Figure 2-6.
Figure 2-6: Channel B Default Sample Delay
The default displays will also be used when the meter is preset. The default for two sensors will display
power readings on both lines as shown in Figure 2-7.
Figure 2-7: Channel A & B Default Sample Delay
If a sensor is uncalibrated, the word UNCALIBRATED will be displayed for the channel as shown
in Figure 2-8.
Figure 2-8: Sample Delay with Uncalibrated Sensor
The default display will be presented after attachment of a new sensor. Sample delay offsets are available
for each sensor. The use of a non-zero offset will be indicated by an asterisk between the last digit and
the units as shown below. The delay displayed is the sample delay before the application of any offset.
∆ΛΨΑ56.354*υΣ
The Sample Delay display line interacts with the Min/Max display line. If Min/Max is turned on for a
line that Sample Delay was tracking, Min/Max will be displayed instead of Sample Delay.
2-6Manual 21568, Rev. D, February 2001
2.3.2Setting Sample Delay
The sample delay can be set from two locations within the menu structure. One location is at the default
display where sample delay information is displayed. The other is in the menu structure where the peak
sensor setup is configured.
Sample Delay Operation
You will be presented with a display with a decimal point fixed in the display. Normally, four digits are
available to the left of the decimal point and three digits to the right as shown below. Leading zeros will
be suppressed.
XXXX.XXX µS
When the units are set to nS, only one digit will be available to the right of the decimal.
The right and left arrow keys move a cursor to select a digit or unit to be changed. The cursor will stop
only at valid digit or unit locations (valid digits are shown by ^ below). The cursor will stop under valid
blank spaces so that large numbers can be entered quickly.
XXXX.XXX µS
^^^^ ^^^ ^
Operation
Press the up key to increment the digit value by 1, or the down key to decrement the digit value by 1. If
a digit is incremented past 9, a carry is propagated to the next higher digit (odometer mode). Similarly,
if a digit is decremented past 0, a borrow will be made from the next higher digit. You can decrement the
delay to a negative number.
An exception is made when the cursor is moved to the 10ths of nanoseconds range. The up or down
arrows will change the display in .5 nS increments. This is the maximum resolution of the sensor.
Press the up or down keys while the cursor is under the units display to cycle through the units. You will
µ
be offered a choice of nS,
The units selected will be used in all displays for the delay for the sensor to which they are assigned.
If a peak measurement parameter is changed, e.g. sample delay or trigger level, the power display will
display NO TRIG (see Figure 2-9) until a new measurement is made with the new parameters in
effect. If the sensor triggers quickly, the message may not be seen. In the TR2 mode, the display may
show MEAS* with the asterisk lines rotating as each measurement is made.
S, or mS. The units display does not wrap around.
Figure 2-9: Sample Delay with No Trigger Display
The GPIB will return numerical data in the No Trig state, depending on the GPIB measurement mode.
See the GPIB Commands in Section 2.4 for more details on Trigger Modes.
Manual 21568, Rev. D, February 20012-7
Series 8035XA Peak Power Sensors
2.3.3Sample Delay Limits
There is no automatic units scaling for the sample display. You can enter any number up to 9999.999
and then set the units, with the exception of the nS range, which allows only one digit to the right of
the decimal. If the sample delay plus the offset exceed the range of the attached sensor, the
of the line will be replaced with an arrow indicating a range error (see Figure 2-10). An up arrow
indicates that a delay is too high, a down arrow indicates that a delay is too low.
Figure 2-10: Sample Dely Over-Range Indication
When the arrow keys are used to change the units, the digits in the display will simply use the new units.
µ
The only exception is going from
to one digit, and that last digit will be either 0 or 5 as shown in the following example:
Starting DisplayActionResulting Display
S to nS. The digits to the right of the decimal point will be reduced
at the end
SSSS
15.678
15.678 µSSSS↓15.5
15.67815.678
Setting Delay from the Default Display
A cursor will be displayed on the sample delay in the default display. When you change the sample delay
by pressing an up or down arrow key, the associated sensor will be immediately programmed with the
new delay. The power display may be replaced with NO TRIG until a new power measurement can be
made with the new sample delay.
If an over-range sample delay is entered, no measurement will be made until the over-range condition is
corrected (over-range includes delay plus offset).
If there is more than one delay display line, the left and right arrows will move the cursor off the end of
one display line and onto the next.
Setting Delay from the Peak Setup Menu
The cursor will be available immediately upon entering this menu. The sensor will not be updated with
the new delay setting until the peak menu sequence is completed. This requires selecting the trigger
mode, setting the trigger level, setting the sample delay, and setting the sample delay offset. The display
will exit to the default measurement display when you press [ENTER] on the last menu in the sequence.
15.5nnnnSSSS
15.515.5
2-8Manual 21568, Rev. D, February 2001
2.3.4Setting Sample Delay Offset
The sample delay offset is settable from the menu following the SET SAMP DLY menu (see the
Menu Tree in Figure 2-1). The method to enter the delay offset will be the same as the method to enter
the sample delay. You can change a set of digits (XXXX.XXX), plus units.
The offset will be range checked together with the sample delay so that the total of sample delay plus
offset does not exceed the range of the sensor. If the range of the sensor is exceeded, a beep may sound
and an arrow will replace the S at the end of the line (see Figure 2-11) to indicate an out of range
condition. If you exit the menu without correcting the out of range condition, no power measurement
will be made.
For example, if the max delay available from a sensor is 100 mS and the sample delay is set to 75 mS, the
maximum offset permitted is 25 mS. Anything larger will cause an arrow to be displayed.
Operation
Each sensor has its own delay offset parameter.
2.3.5Single Peak Sample Measurements
Measurements for a peak sensor will be performed over a number of single samples. A single sample is
defined as follows:
1.The sensor is armed.
2.A pulse is triggered and sampled by the sensor. The sensor informs the meter via handshaking
that a measurement voltage is available.
3.The meter measures the voltage and computes the power from this one trigger sample.
When averaging is turned on, the averaging will be done over a number of single samples. Auto
averaging will use an increasing averaging number as the power level being measured declines. For
example, the number of samples required for measurements at 20 dBm is 1. At -20 dBm, the number of
samples will be about 32 (this could change depending on mode or software version).
Manual 21568, Rev. D, February 20012-9
Series 8035XA Peak Power Sensors
2.3.6Real Time Pulse Profile and Sample Position Display
The Detector Out connector on the rear of the 8035XA Series Peak Power Sensor can be connected to
any common oscilloscope for a real-time amplitude profile of your signal, delayed by about 120 ns.
Connect the SMB to BNC cables to your oscilloscope (digital scope preferred - especially for sample
µ
delay setting >500
s) as shown in Figure 2-12.
Figure 2-12: Pulse Profile and Sample Delay Test Setup
Use the Sample Delay output as an oscilloscope trigger source. This waveform rises at the trigger point
and falls at the sample point; thus, it provides both a stable scope trigger source and a precise indicator
of the trigger point and sample point.
The time length of the sample delay pulse is the sum of the sample delay which is displayed on the Series
8540 power meter front panel, and the sample delay offset which is available through the menu.
2-10Manual 21568, Rev. D, February 2001
2.3.7Sample Delay Offset
total = sample delay + sample delay offset
total = 20,000 s + 0.120 s = 200 120 sµµ µ
total = 200,000 s + (-0.010 s) = 199.990 sµµ µ
t
t
t
or
total
t
In addition to compensating for delay line triggering variations or external triggering cables, sample
delay offset can be used to set a 0.0 ns time reference point after the trigger point (see Figure 2-13).
Operation
Figure 2-13: Sample Delay
The use of a digital oscilloscope can permit better viewing of data. There are two small markers injected
onto this waveform. The first is a small triggering marker which is added slightly after the trigger point.
The second marker on the waveform is the sample marker. The sample marker is located slightly behind
the actual sample point. There may be small markers at the end of the sample transfer and when the
trigger signal occurs. Because the visibility of these markers varies greatly with signal level and
horizontal sweep rate, the use of the SAMPLE DELAY output is recommended.
In Figure 2-14, triggering occurs at the frame start of a pulsed TDMA communications signal. The
trigger level is set such that triggering can only occur on the highest amplitude pulse; this provides stable
triggering. A sample delay offset is used to set a 0.0 ns reference point at the start of the third data burst
pulse.
Sample
Delay
Sample
Delay
Detector Out
Connection
Internal
Tr i g ger
Level
Sample Delay Offset
Manual 21568, Rev. D, February 20012-11
Sample Delay
Connection
Figure 2-14: Using SD to Offset a 0 ns Time Reference
Series 8035XA Peak Power Sensors
2.3.8Measuring Pulse Droop
Pulse characteristics such as droop, ripple, and overshoot can be measured quickly using referenced
measurements. This involves the use of the front panel REL key for the Series 8540 power meter users,
or the CALC#:REF:COLL function for 58542 power meters.
1.Connect the 8035XA Peak Power Sensor to the power meter and the CALIBRATOR output.
2.Press [CAL/ZERO] to calibrate the sensor to the meter.
3.Upon successful completion of power sweep calibration, connect the sensor to a pulsed signal
source. The power level must be above the trigger level.
4.Connect the 8035XA Detector Out and Sample Delay leads to a digital oscilloscope.
5.Set the sample delay (DLY
) to the t1 position just after the rising edge as shown in
A
Figure 2-15.
6.Press [REL]. The display should now read approximately 0.00 dBm or 100%.
7.Set the sample delay to the t
position just before the falling edge of the pulse.
2
The display is now reading the pulse-top amplitude variation.
t
1
t
2
Trigger Level
Figure 2-15: SD Setting for Measuring Pulse Droop
Detector Out
2-12Manual 21568, Rev. D, February 2001
2.3.9Measuring 3 dB Pulse Width
Pulse width and other pulse timing parameters can be measured using the REL key and the sample delay
offset control (see Figure 2-16).
1.Preset the delay offset to 0 nS.
2.Set the sample delay equal to about half the pulse width.
3.Press [REL] to set the 0.0 dB reference level (100% for Watts display).
4.Set the sample delay to a position on the rising edge of the pulse. Increment or decrement the
sample delay value until the power level display reads approximately -3.00 dBr.
5.Remember or write down the sample delay value.
6.Press [MENU], and use the up/down arrow keys to display SETUP MENU. Press [ENTER].
Select PEAK SNSR SETUP, then select the current triggering method (INT or EXT).
When DLY Offset appears, set the offset value to the same time value from Step 4. This
sets the 3 dB down time point to a 0.0 ns reference position.
7.Press [ENTER] to return to the measurement display.
Operation
8.Set the sample delay to a position on the falling edge of the pulse. Increment or decrement the
sample delay value until the display again reads approximately -3.00 dBr.
The sample delay currently displayed is the signal’s 3 dB pulse width.
100% Reference Level
3 dB down (50%)
Trigger Level
t
Sample Delay
t =
Offset
Figure 2-16: Using SD to Measure a 3 dB Pulse Width
Sample Delay = Pulse Width
Total Delay
3 dB down (50%)
Manual 21568, Rev. D, February 20012-13
Series 8035XA Peak Power Sensors
2.3.10Measuring Rise-Time
Rise time measurements can be performed using a technique similar to the pulse width measurement.
This example uses a linear Watts display readout rather than the more common logarithmic dBm
readout for convenient identification of the 10% and 90% levels.
1.Preset the delay offset to 0 ns.
2.Press [dBm/mW] to obtain a linear, Watt, display readout.
3.Set the sample delay equal to about half the pulse width.
4.Press [REL] to set the 100% reference level.
5.Set the sample delay to a position on the rising edge of the pulse. Increment or decrement the
sample delay value until the power level display reads approximately 10%.
6.Remember or write down the sample delay value.
7.Press [MENU]. Select SETUP MENU then PEAK SNSR SETUP. Proceed to the SAMPLE DELAY OFFSET selection. Set the offset value to the same value from
Step 6.
8.Return to the measurement display and increment the sample delay until the display reads
approximately 90%.
The sample delay currently displayed is the 10% to 90% rise time.
2-14Manual 21568, Rev. D, February 2001
2.4GPIB Commands
These commands supplement the commands given in the Series 8540C Universal Power Meter
Operation and Maintenance Manual.
2.4.1Setting Trigger Modes
These commands set the trigger method for the 8035XA sensor. The sensor can be set to trigger on the
rising RF envelope of the power signal. This is the internal trigger mode. An external TTL trigger can
be used, or the sensor can “free run” and allow a CW measurement mode with no trigger required.
The terms digital filter (as used in some instrument instructions) and averaging buffer (as used here) are
interchangeable.
Examples:
Operation
OUTPUT 713;PEAK A INT TRIG -10.00! Configure sensor A for internal trigger at
OUTPUT 713;PEAK B EXT TRIG 1.50! Configure sensor B for external trigger at
OUTPUT 713;PEAK A CW! Configure sensor A for CW measurements
! -10.00 dBm trigger level
! 1.50 Vdc trigger level
In this example, the address 713 means "Type 7" GPIB instrument, and address 13 for the power meter.
The GPIB control command (the portion to the left of the semicolon) may vary.
Trigger Modes With a Peak Sensor
Trigger Modes With a Peak Sensor
Trigger Modes With a Peak SensorTrigger Modes With a Peak Sensor
Examples:
OUTPUT 713;TR3! Last measured value will be returned
OUTPUT 713;TR2! Refill averaging buffer before measurement display
OUTPUT 713;TR1! Wait for trigger before returning measurement
OUTPUT 713;TR0! Measure, but no display
TR0
The meter will measure power, but the display of measured data will be suppressed and the GPIB bus will
not be updated with measurement data.
TR1
This mode will wait until the sensor triggers before returning a measurement. The measurement
returned will be after the application of any averaging. The display for the channel will follow the TR1
mode. When TR1 is received over the bus, NO TRIG will be displayed until the sensor has triggered
and measurement data is available.
TR2
This mode will wait until enough measurements are made to completely refill the averaging buffer. The
measurement returned will be the average of all measurements in the buffer. MEAS* will display with
one of the asterisk lines rotating for each measurement) while the averaging buffer is being filled.
TR3
The last measured value will be returned. This mode will not wait for the peak sensor to trigger.
Manual 21568, Rev. D, February 20012-15
Series 8035XA Peak Power Sensors
2.4.2Setting Delays
When the sensor is configured for internal triggering, the delay from trigger to measurement sample
must be set. The valid range of delays is -20 ns to 100 ms, expressed in a floating point number. The
smallest delay increment is 0.5 ns. Setting delays in CW trigger mode are invalid and ignored.
Examples:
OUTPUT 713;PEAK A DELAY 1.20E-6! Configure sensor A for a delay of 1.20
OUTPUT 713;PEAK B DELAY 33.5E-9! Configure sensor B for a delay of 33.5 ns
The offset command adds a known offset to the trigger delay value. The actual value of delay would be
the DELAY set plus the OFFSET set. The default value of offset is 0. The valid range of offset is -20 ns
to 100 ms, expressed in a floating point number.
Example:
OUTPUT 713;PEAK A OFFSET 1.00E-6! Configure sensor A for a delay offset of 1.00
µ
s
µ
s
2-16Manual 21568, Rev. D, February 2001
2.4.3Reading Values
These commands read the current settings of delay or offset.
Examples:
OUTPUT 713;PEAK A?! Query the current sensor A trigger setting
ENTER 713;TRIG$! Query the trigger mode setting of the sensor, and return:
CW
or
INT_TRIG
or
EXT_TRIG
OUTPUT 713;PEAK A DELAY?! Query the current sensor A delay setting
ENTER 713;Delay
OUTPUT 713;PEAK B OFFSET?! Query the current sensor B offset
ENTER 713;Offset
Operation
Manual 21568, Rev. D, February 20012-17
Series 8035XA Peak Power Sensors
2.4.4Commands for the 58542
The following peak power sensor GPIB commands are used with the Model 58542 VXI Universal Power
Meter. Refer also to the Model 58542 Operation and Maintenance Manual for additional details.
SENSe<sensor 1 or 2>:TRIGger:SOURce<INTernal|EXTernal|CW>
This command sets the sensor (1 or 2) peak trigger mode to either the INTernal, EXTernal, or CW
mode.
SENSe<sensor 1 or 2>:TRIGger:DELay[:MAGnitude]<1e-6, -20e-9,100e-3>
This command sets the sensor (1 or 2) peak delay value to any desired time from -20e-9 to 100e-3
seconds, with 1e-6 seconds being the default setting.
SENSe<sensor 1 or 2>TRIGger:OFFSet[:MAGnitude]<0, -20e-9,100e-3>
This command sets the sensor (1 or 2) trigger offset time to any desired value from -20e-9 to 100e-3
seconds, with 0 seconds being the default setting.
SENSe<sensor 1 or 2>TRIGger:LEVel[:MAGnitude]<-10 dBm, -30 dBm, 20 dBm>
When the INTernal trigger mode is in use, this command sets the trigger level to any desired power
level setting from -30 to +20 dBm. Default is -20 dBm.
SENSe<sensor 1 or 2>TRIGger:LEVel[:MAGnitude]<1.700, -0.100, 5.000>
When the EXTernal trigger mode is in use, this command sets the trigger level to any desired voltage
level from -0.100 to 5.000 V. Default is 1.700 V.
2-18Manual 21568, Rev. D, February 2001
3.1Introduction
This chapter describes the electrical operation of the Series 8035XA Peak Power Sensors.
Refer to the block diagram in Figure 3-1 to follow the general function of the sensor. The RF signal is
rectified in the sensor element, and the video envelope is buffered and delayed by the input amplifier
and delay buffers. This buffered envelope is available at the Detector Out connector. The Track and
Hold (T&H) function tracks and follows the signal and then holds it for hundreds of microseconds. The
Sample and Hold (S&H) function acquires the S&H output and holds it for hundreds of milliseconds.
The timing circuitry generates the sample pulses from the trigger input or, if the sensor is in the free run
mode, from an internal oscillator.
The block diagrams, circuit descriptions, and the troubleshooting information in Chapter 4 are written
around the circuit test points. The delay lines shown in Figure 3-1 are illustrated in the Analog Timing
Diagram in Figure 3-3. Delay lines match the delay through the analog channel to the sample point, and
the delay through the timing circuitry to the sample generator. Since fixed lumped constant delay lines
are used, the match is not perfect. The delay through the INTernal trigger is slightly longer than the
delay through the EXTernal trigger due to the delay of the input differential preamp.
3
3
33
Theory of Operation
Figure 3-1: 8035XA High Level Block Diagram
Manual 21568, Rev. D, February 20013-1
Series 8035XA Peak Power Sensors
3.2Analog Assembly Description
Refer to Figure 3-2, the Analog Timing Diagram in Figure 3-3, and schematic diagram #21351 in
Chapter 7 to follow the discussion of the Analog PC assembly circuit operation.
The rectified signal from the detector goes into the resistors R1 or R2 (TP1 and TP2). The signal sees
Ω
to ground from either input (the negative input sees 2 kΩ to a virtual ground inside R100). R3
2 k
helps to balance the input bias current. U1 and U2 delay the signal so the trigger output and video
output may be viewed close together. U4 and U5 are buffers for the delay lines (TP3).
U10C and U7A provide a fast Track and Hold (T&H). U7A buffers the T&H capacitor C21, and U7B
buffers the S&H capacitors, C1 & C2.
Figure 3-2: Analog PC Assembly Block Diagram
A track and hold differs from a sample and hold in the manner in which the signal prior to the hold is
manipulated. In a sample and hold, the sample gate turns on and the holding capacitor is charged to the
signal potential, then the sample gate turns off and the hold capacitor maintains the value of the input
at the time of the sample. In a track and hold circuit, the voltage on the hold capacitor is the same as
the input (tracks) until the track gate goes off, after which the level is held until the track goes on and
the hold capacitor again follows the input.
The INTernal or EXTernal trigger source is selected by U10D and U11A. U11B functions as an inverter
for HIGHGAIN. U6 amplifies the trigger signal by 1 or 41. Trigger DAC U9 is loaded with a count
from the serial chain. The DAC needs the data signal held after the clock for at least 80 ns. A2R12 and
A2C25 on the Digital board take care of that requirement. That count gets translated into a voltage
between -0.1 V and about +5 V by U8A. Digital board comparator A2U18 provides the TRIG-IN pulse
(A2TP25). A2R42 provides hysteresis for A2U18.
3-2Manual 21568, Rev. D, February 2001
Theory of Operation
☛
☛
☛☛
NEG INPUT
TP1
POS INPUT
TP2
DIF - AMP
TP3
1ST DELAY
TP4
2ND DELAY
TP5
MONITOR
TP9
TRACK&HOLD
TP7
OUTPUT
TP12
TRIG AMP
TP6
NOTE:
All times shown in Figure 3-3 are referenced to TP3, and are not to scale.
SAMP
J2-5
DELAY TIME
TRANSFER TIME
Figure 3-3: Analog Circuit Timing Diagram
Manual 21568, Rev. D, February 20013-3
Series 8035XA Peak Power Sensors
3.3Digital Assembly Description
3.3.1Overview
Refer to the Digital PC block diagram in Figure 3-4, and the Digital Timing Diagrams in Figures 3-5,
3-6 and 3-7.
The digital board provides the timing functions for delays between a small negative time (with respect
to either the video monitor, or the sampled pulse) and >100 ms. In the CW mode, the digital board is
not reset, but continues to generate clocks and samples at about 70
or EXTernal modes, an acquisition is requested by the host (the power meter to which the sensor is
connected is the host) which causes READY to be set. When an input trigger is received, it is latched
and delayed by a FINE delay, and then starts a 10-MHz clock. The clock increments a COARSE
counter until it reaches FFFFF or all ones, and then outputs a Ripple Carry Out (RCO) signal. This is
latched as SAMPle, delayed by one count, and then compared to the count of 51
µ
allow the SAMPle to be 51
MHz clock is stopped for about 5
flip-flops reset for about 1
When the serial clock is running, CLKHOLD resets the TRIG loop and loads the counter.
s wide. Then the COARSE counter is reLOADed for about 5µs, the 10-
µ
s, the LOAD unasserted, and the TRIGger, SAMPle, and READY
µ
s. A 48-bit serial stream provides the 80350A configuration information.
µ
s intervals. In either the INTernal
µ
s out of the counter to
☛
☛
☛☛
NOTE:
Over-score indicates a logic-NOT condition.
Figure 3-4: Digital PC Assembly Block Diagram
3-4Manual 21568, Rev. D, February 2001
3.3.2Description
When READY (TP17) is true, U8B flip-flop (TP14 - TRIG) is set after TRIG-IN goes high. U13 delays
the TRIGgered signal by a delay programmed in 1/2 ns intervals. U3 is a 10-MHz gated delay line
oscillator which, when enabled by the fine delay, clocks (TP1) the coarse counter U1, U5, U6, U15 and
U16, and the SAMPLE flip-flops U7B and U8A. Unlike conventional oscillators which free run, a
gated delay line oscillator beginning time period is the same length as all of its other time periods with
the possible exception of the last period when enable is unasserted. When RCO (TP8) is true for one
clock cycle (ignores pulses less than 100 ns), U7B is latched as SAMPle (TP11). SAMPle is delayed by
one count because 51
U1. When true (when SAMPle has been on for 51
for the COARSE counter is asserted and held low via U9C, R34, and C27 until the 10-MHz
LOAD
clock (U3) stops via U12A, U10B, (TP9), U4A, and U4C. Note the sequence:
1.CTR-CLK (TP1) must be running.
Theory of Operation
µ
s (TP7) can still be true when SAMPle goes true, and AND’d with 51µs from
µ
s), the U10A loader receives a negative edge clock.
2.LOAD-CTR
This loads the COARSE counter.
3.CTR-CLK (TP1) stops. LOAD-CTR
4.LOAD-CTR
delay which delayed the start of the 10-MHz clock now works against turning the 10-MHz
clock off.
SAMP (TP11) going high turns the Track and Hold (T&H) to Hold on the Analog board, and turns
the Sample and Hold (S&H) to Sample. When it goes low, the T&H goes back to tracking the input
and the S&H holds the sampled signal level. U10B POST (TP5), the major reset circuit, resets READY
(TP17) to prevent the trigger circuit from restarting, continues to reset TRIG (TP14) (except in the
CW mode) which started in PRE-POST, and resets SAMP (TP11). When the host has read the data,
the DATA-IN line is momentarily pulsed low by the host which sets READY (TP17), and pulls the
DATA-IN line (TP20) low via diode CR3. Note that the DATA-IN — READY handshake does not
occur in the CW mode.
EEPROM U11 stores the sensor type, serial number, and calibration constants. This IC is only accessed
by the host. Except for device start and stop conditions, DATA-IN can change states only when CLK is
low. After device stop has been sent, the host sends a 48-bit serial stream to set up the 80350A sensor.
Four zeros are sent followed by the 12 DAC trigger bits, followed by the fine counter 8 bits, 20 bits for
the COARSE counter (with FFFFF meaning zero delay), and finally the 4 control bits (INTernal,
EXTernal, CW, and HIGHGAIN). Because the serial DAC on the ANALOG board has a data hold
requirement of 80 ns minimum, DATA-4 (TP2) must be delayed by R12 and C25.
(TP9) goes low and stays low while CTR-CLK continues for at least one cycle.
is still low. CTR-CLK continues in the CW mode.
returns high at least 200 ns before POST (TP5) returns high. The same FINE
Incoming CLK turns on U3 (10 MHz - TP1) and U9C (LOAD
loads the COARSE counter with the new delay.
The test points are essentially in order across the length of both the Analog and Digital boards in the
approximate order of signal progression to aid in troubleshooting. In addition, the between-the-board
connectors can be used as test points.
Manual 21568, Rev. D, February 20013-5
) (TP9) via U12B (CLKHOLD) which
Series 8035XA Peak Power Sensors
Figure 3-5: Digital Timing Diagram, INT/EXT Trig Mode
3-6Manual 21568, Rev. D, February 2001
Theory of Operation
Figure 3-6: Digital Timing Diagram, CW Mode
Figure 3-7: Digital Serial Data Cycle Timing Diagram
Manual 21568, Rev. D, February 20013-7
Series 8035XA Peak Power Sensors
3-8Manual 21568, Rev. D, February 2001
4.1Introduction
Information in this section is useful for periodic evaluation of the performance and/or receiving
inspection testing of the 8035XA Series Peak Power Sensors. These tests assume that the operation of
the particular 8540 Series Power Meter or Model 58542 VXI Power Meter being used with the sensor
has already been verified as described in the power meter’s Operation & Maintenance Manual.
Verifying the Frequency Cal factors stored in the sensor EEPROM is not described in this procedure. If
necessary, the Cal Factors can be verified with a Vector Network Analyzer using similar procedures as
for standard power meter sensors.
Before starting these tests, connect the Peak Power Sensor(s) to the 8541/8542 meter, and allow at least
24 hours for warm-up. These tests will only be valid if the power meter and the sensor(s) have been
calibrated at an ambient temperature between +20 °C and +30 °C (+68 °F to +86 °F), and are operating
±
within
3 °C (±5.4 °F) of the calibration temperature.
4
Calibration and Testing
4.2Equipment Required
The following items of test equipment (or equivalent) are required for completing the Performance
Tests described in this chapter.
DescriptionInstrument ModelRequirements
Power MeterGiga-tronics 8540 Series (or VXI)Compatible with 8035XA Sensor
RF SourceWavetek Model 2510 (Hi Power Opt.) +20 dBm @ 50 MHz
Oscilloscope (DSO)LeCroy 9400Bandwidth 125 MHz
CW Thermistor Power MeterHP Model 432BInst. Acc. of at least 0.5%
Thermistor MountHP 478A-H750 to +10 dBm range <1.1 SWR
Pulse GeneratorWavetek Model 278Delay and pulse width control
Attenuators 10, 20, 30 and 40 dBm Weinschel Model AC118A-90-33Type N, 0.5 dB accuracy
Directional CouplerNarda Model 3002, 10 dB
Low Pass FilterIntegrated Microwave Model 904 881 >50 dB Atten. @ 100 MHz
VSWR <1.20 @ 50 MHz
Manual 21568, Rev. D, February 20014-1
Series 8035XA Peak Power Sensors
4.3Power Linearity Test
The linearity will be tested in a series of 10 dB steps over the range of the sensor. At low power levels,
the measurements will reflect the uncertainty due the noise and zeroing specifications. Make a copy of
the Performance Verification Data Sheets at the end of this chapter to record the data from this test.
Figure 4-1: Power Linearity Test Setup
4.3.1CW Linearity Test
1.Connect the test setup as shown in Figure 4-1. Set the RF source to 50 MHz. Be sure the sensor
has had at least 24 hours of warm-up time. To take accurate measurements, it is essential to
take out any drift that might occur.
a.Calibrate the Peak Power Sensor as described in the applicable 8541/2 Operation and
Maintenance manual.
b.Place the 8541/2 power meter in the CW mode.
c.Set the 8541/2 to display power in linear units (mW).
d.Set Averaging to 4.
e.Set the CW frequency to 50 MHz.
2.Start with no attenuation between the coupler and the Peak Power Sensor. Record results on
the first row of the linearity data recording sheet.
3.Turn the RF source off and zero the Peak Power Sensor by pressing [ZERO/CAL].
4.Zero the thermistor power meter.
5.Turn the RF source on.
±
6.Adjust the RF source until the thermistor power meter reads 10.0 mW
4-2Manual 21568, Rev. D, February 2001
0.25 mW.
7.Record the thermistor power meter reading, P1, and the 8541/2 reading, R1, on the data sheet.
8.Adjust the RF source until the thermistor power meter reads 1.0 mW
9.Record the power meter reading, P2, and the 8541/2 reading, R2, on the data sheet.
10. Calculate and record the reference power ratio P1/P2, and the DUT reading ratio, R1/R2.
11. Calculate and record the Linearity Error using the formula:
12. Add an additional -10 dB of attenuation between the coupler and the Peak Power Sensor and
repeat Steps 3 through 9, filling in the 10 dB through 40 dB (through 30 dB in Peak Mode)
attenuation rows of the data sheet. On these rows, add the current linearity error to the
accumulated linearity error in the row above. Verify that this accumulated error is less than the
specified values given on the data sheet.
4.3.2Peak Linearity Test
Calibration and Testing
±
0.025 mW.
Set the sensor to EXT, 1.7 V, 10 µs, 0 offset, and connect the TRIGGER IN (black lead) to the pulse
generator. Set the pulse generator to 1 kHz, and repeat all of the steps in the CW Linearity Test for this
Peak Linearity verification test. Place the 8540 power meter in the EXT Trigger Mode instead of the
CW mode. Record the readings on the Peak Linearity Data recording sheet at the end of this chapter.
Manual 21568, Rev. D, February 20014-3
Series 8035XA Peak Power Sensors
4.4Trigger Modes Test
Connect the test setup as shown in Figure 4-2. Set the pulse generator for a 100 Hz pulse repetition
µ
frequency. Set the RF source to make a 2
(mW). Set the source to a frequency of 50 MHz with a power level near 0 dBm.
1.Initially set the delay of the pulse generator to 0
instead of the CW mode. Then select:
2.Set EXT Trigger. Set the top line of the display for A, and the bottom line for DLYA
(see Figure 2-5). Set the delay for 1
s wide pulse. Set the 8541/2 to display power in linear units
µ
s. Check that the Sample Delay width is at 1 µs ±25%.
µ
s. Set the Peak Power Sensor to the EXT mode
Figure 4-2: Detector Output and Trigger Level Setup
4-4Manual 21568, Rev. D, February 2001
4.5Detector Output Test
Leave the test setup as shown in Figure 4-2. Connect the 1 MΩ oscilloscope input to the Detector
Output. Verify that the pulse has an amplitude of approximately 200 mV peak to peak for a 0 dBm
signal.
4.6Trigger Level Test
1.Set the INTernal trigger delay to 10 µs and trigger level to 0 dBm. Set the input pulse amplitude to
10 dBm. Verify triggering by noting that the sample delay pulse is present.
2.Set the trigger level to -5 dBm. Set the input level to 0 dBm and verify trigger operation. Set the
trigger to -10 dBm and verify trigger operation. Set the input level to -20 dBm and verify triggering
does not occur.
3.Select Pulse Sensor EXT TRIG. Set the external trigger to 1.7 Vdc. Verify triggering with +5 V
TTL peak pulse input, and no trigger with the EXT TRIG IN.
4.7Delay Test
Calibration and Testing
The Upper and Lower Limits in Table 4-1 are the minimum tolerances to test Delay functionality.
1.Connect sensor to channel A of the 8541/2, allow to warm up for 24 hours, and then calibrate the
sensor.
2.Select
PRESET
3.Connect the sensor to a pulse generator with a 0 dBm, 50 MHz, 2
from the RECALL menu.
µ
s pulse.
4.Use an oscilloscope or a frequency/width counter and measure the pulse width of the SAMPLE
DELAY output at the settings listed in Table 4-1. The sample delay measurements in the chart are
referenced at 1.7 V:
This completes the Specification and Performance Verification Tests for the 8035XA Peak Power
Sensor. If the Sensor has performed as described in the preceding tests, it is functional and correctly
calibrated.
If the sensor fails to meet the criteria defined in these tests, refer to the Maintenance and
Troubleshooting chapters of this manual, or contact your local Giga-tronics Sales Representative for
assistance.
2.Accumulated error is the sum of the current 10 dB segment linearity error plus the previous accumulated error.
3.System linearity + power meter uncertainty + zero settability.
Manual 21568, Rev. D, February 20014-7
Series 8035XA Peak Power Sensors
4-8Manual 21568, Rev. D, February 2001
5.1Introduction
There is no regularly scheduled maintenance required for the Peak Power Sensors. Utilize the normal
operation calibration procedure in Chapter 2 to ensure that the sensor is operating within its specified
linearity.
It is recommended that the sensor rise-time, overshoot, and zero be calibrated at 6-month intervals as
follows:
5.1.1Rise-Time Adjustments
It is important that the rise time of the RF pulse be fast (about 10 ns), and without overshoot. Care is
necessary to get repeatable results.
Connect the test setup as shown in Figure 4-2 of the Performance Verification Test procedure. Set the
pulse generator for a 5 kHz pulse repetition frequency. Set the RF source to make a 2
the 8541/2 to display power in mW. Set the source to a fixed frequency at a power level near 10 dBm.
Set the RF frequency to 50 MHz.
5
Maintenance
µ
s wide pulse. Set
1.Set the delay of the pulse generator to 0 ns. Set the Peak Power Sensor to the delay triggered
2.The 8541/2 will read the settled power of the pulse, approximately 10 mW.
3.Press [REL].
4.Increase the delay of the pulse generator to 900 ns. Vary the delay until the maximum power is
found. Subtract 100% from this number to calculate the overshoot.
5.Increase the delay of the pulse generator until the reading drops to 90
6.Increase the delay of the pulse generator until the reading drops to 10
7.Subtract the time noted in Step 4 from the time noted in Step 5. The result is the 10% to 90%
power rise time.
8.C3, C59 and C63 are factory select components chosen for optimum rise-time, fall-time, and
overshoot. If it is necessary to change these parts, C59 and C63 should have the same value.
The detector out signal on the oscilloscope will indicate the direction of change in the rise
time and overshoot, but is not suitable for quantitative measurements. For best results, profile
the pulse by stepping the measurements using small (about 10 ns or less) delay increments.
s) [ENTER] (Set Delay Offset to 0.00) [ENTER]
±
1%. Note this time.
±
1%. Note this time.
Manual 21568, Rev. D, February 20015-1
Series 8035XA Peak Power Sensors
5.1.2Zero Adjustment
1.This test requires that no RF is present, and that the instrument is in the CW mode. Be sure that
the system is allowed to warm up at least 30 minutes. The measurement should be made quickly to
prevent cooling of the circuit. Refer to Figure 5-1.
2.Remove the cover of the sensor and connect a dc millivolt meter between TP11 (Common) and
TP12 (High) on the Analog Board.
3.Adjust R33 (OFFSET ADJ) for 0.00 Vdc
4.Replace the cover and calibrate the sensor.
±
100 µV.
Figure 5-1: Principal Test Component Locations
5-2Manual 21568, Rev. D, Janaury 2001
5.2Troubleshooting
Refer to the Analog and Digital PC Board schematics on pages 7-12 and 7-15, the block diagrams on
pages 3-1 and 3-4, and the timing diagrams on pages 3-3, 3-6, and 3-7 for assistance in performing the
following procedures.
Use a pulsed 1 GHz waveform of about 0 dBm for troubleshooting to trace the signal through the sensor.
The waveform should have a rep rate of about 1 kHz, pulse width about 100
-20 dBm, and delay = 0.
At times it may be required to carefully check voltages at IC pins. Since the PC boards are surface
mount, careless probing can: short two pins, break leads, damage boards and, in extreme cases, cause the
components to break away from the board taking pads and traces with them.
Static sensitive components. Use proper techniques including,
but not limited to, wrist straps, anti-static mats, tools, soldering
irons, desoldering tools, and proper non-static clothing.
The most common cause of failure is the application of too much power (more than +23 dBm) which
destroys the diode element. This will most likely manifest itself as a non-successful completion of the
sensor calibration routine. (see Chapter 2). Verifying that another sensor will calibrate successfully will
isolate the fault to the peak power sensor and not the instrument.
CAUTION
Maintenance
µ
s to start, INT trigger at
A1TP1 should measure about -0.2V, and A1TP2 should measure about +0.2V with a 0 dB CW input. If
either of these voltages are absent, the element is probably bad and should be replaced.
The following table lists problems that can occur with the sensor in the logical order that these
problems might become evident. Go to the first described symptom, and then follow the instructions
given in the section covering that symptom. Symptom descriptions assume that everything preceding
that symptom in the table is functioning properly.
Table 5-1: Sensor Malfunction Symptoms
SymptomSection
Sensor is not recognized as being present5.2.1
Will not calibrate / zero5.2.2
INTernal will not trigger or level error5.2.3
EXTernal will not trigger or level error5.2.4
Delay error5.2.5
In these procedures, the component prefix A1 designates parts located on the Analog PC Board. The
prefix A2 is for parts located on the Digital PC Board. Voltage levels at Monitor Out and at test points
are approximate. These values vary from sensor to sensor. To ensure that proper levels are present,
increase or decrease the measured input or trigger level. The measured point should change
correspondingly. Certain supplies (A1U3, 4, 5, 6, and A2U18 and A2 5 V line) are isolated by 10 ohm
resistors which decouple noise and can act as fuses. If one of these resistors (A1R108, 109, 110, 111, or
112, or A2R42 or A2R45) is open, replace the corresponding tantalum capacitor (A1C51, 52, 53, 54, or
A1C30 or A2C19).
Manual 21568, Rev. D, February 20015-3
Series 8035XA Peak Power Sensors
5.2.1Sensor Not Present
Note that this type of failure indication is usually caused by a bad cable or a faulty temperature sensing
thermistor (RT1).
With the sensor disconnected from the power meter, check the resistance from Digital board J1 pin 4 to
Ω
ground. Is it about 10 k
?
No
Yes
5.2.2Calibration
Calibration failures are generally caused by a damaged diode element. Ensure that the system is in the
CW mode. Steps 1 and 2 refer to the Analog board.
A1TP3, TP4, TP5, and TP6 should be checked for oscillation, especially if drifting occurs.
☛☛☛☛
NOTE:
1.Check for a signal present at MONITOR OUT or A1TP9. (Should be near 0
Yes
Yes
YesYes
Over-score indicates a logic-NOT condition.
signal input, and about +3 Vdc at +20 dBm.)
No
No
NoNo
A2RT1 bad.
(If A2RT1 must be replaced, be sure to install the new RT1 using heat sink
compound. RT1 should protrude 0.13" above the PC board.)
Cable bad.
µ
V with no
Check as appropriate, A1TP4, then A1TP5, or A1TP3, A1TP1, and A1TP2.
Replace as required (as isolated by test points and supply tests) A1U3, A1U4,
or A1U5.
Continue to Step 2.
2.(A1TP9 OK) Check for toggling signal at J2 pins 4 and 5 (SAMP and SAMP). Toggling?
No
No
NoNo
Yes
Yes
YesYes
Continue to Step 3.
Check A1TP7, A1TP10, and the DC OFFSET adjustment (A1R33).
A1TP10 should be 0 with no signal input, and about 0.6 with +20 dBm. See
Zero Adjustment in Section 5.1.2.
3.(SAMP not toggling) Refer to the Digital board. Check TRIG (A2TP14) Is it High?
No
No
NoNo
Yes
Yes
YesYes
A2U17, A2U8, A2CR4, or A2R35 bad
Continue to Step 4
4.(TRIG high) A2TP1 toggling? (10 MHz CTR-CLK)
No
No
NoNo
Yes
Yes
YesYes
5-4Manual 21568, Rev. D, Janaury 2001
A2U13 (A2TP12), A2U9, or A2U3 bad
Continue to Step 5
5.(A2TP1 OK) A2TP9 high?
Maintenance
No
No
NoNo
Yes
Yes
YesYes
6.(A2TP9 high) A2TP11 stuck high?
No
No
NoNo
Yes
Yes
YesYes
5.2.3INTernal
Internal problems are generally due to trigger problems. A1U9 has a programming peculiarity in that it
requires an 80 ns hold time. A2R12 and A2C25 satisfy that requirement. If the DAC appears not to
program, check A1CR1 before checking the DATA-4 timing or replacing the IC.
1.Set the trigger level to +20 dBm. Check the voltage at A1TP8. >4 Vdc.
No
Yes
A2U9, A2U10, or A2U12B bad
Continue to Step 6
A2U7 bad, or the coarse counter A2U1, U5, U6, or U16. Note that A2TP8
and TP10 check the ICs on the back of the board for RCOs (Ripple Carry
Outs). Note that the RCOs of the counters will glitch (Ignore pulses less than
50 ns. Adjusting the scope trigger level generally allows glitch rejection.) A
pulse of approximately one clock width is necessary for the next stage to
count.
A2U10, U12, U1, or U4 Check A2TP16, A2TP5, and A2TP7
A1CR1 A1U6, A1U8, A1R12, or A1C25 bad.
Continue to Step 2.
2.Set the trigger level to -30 dBm. Check the voltage at A1TP8. <+0.1 Vdc.
No
Yes
3.Check for pulses (about 4
No
No
NoNo
Yes
Yes
YesYes
A1U6, A1U8, A1R12, or A1C25 bad.
Continue to Step 3.
±
2 V peak) at A1TP6 with 0 dB, 1 kHz repetition rate.
Continue to Step 4.
Go to Step 5.
4.(A1TP6 bad) J2 pin 13 low?
No
No
NoNo
Yes
Yes
YesYes
A2U17 or A2R32 bad.
A1U10, A1U11, A1U6. Check for about 400 ±200 mV pulses at U6 pin 3. If
not present, A1U10 is bad. Otherwise, replace A1U11 or A1U6.
5.Check voltage at A1TP8. Should be about +40 mVdc, about +4 Vdc with trigger level at +20
dBm, and about 0 Vdc with trigger level at -30 dBm.
No
No
NoNo
Yes
Yes
YesYes
A1CR1, A1U9, A1U8.
Check A2TP17 (READY - should be high) and A2TP6. If A2TP6 does not
toggle, replace A2U18. Otherwise, replace A2U4, A2U12, or A2U8.
Manual 21568, Rev. D, February 20015-5
Series 8035XA Peak Power Sensors
5.2.4EXTernal
Check A1R127, A1R128, EXT (J2 pin 11 - A2U17 is bad if EXT is high). Otherwise, replace A1U10.
5.2.5Delay
Delay problems are caused by the coarse counter, the fine delay, or the serial data link. Problems can be
grouped by checking in order the delays shown in the table below.
This is a stuck or missing bit test. The next two digit number can be used, such as 26
3.3 ms for 3.27 ms. The accuracy, while typically within
ensure that there are no stuck bits.
Monitor the width of the SAMPLE DELAY output pulse. This signal is about 40 ns wider than the delay
setting. For the first line of the table below, verify that each step is about 25 ns wider than the previous
step.
All of the components listed in Table 5-2 are located on the Digital (A2) board.
Table 5-2: Digital Board Components and Signals
SignalComp SignalComp SignalCompSignalComp
0 nsU1325 nsU1350 nsU1375 nsU5
200 nsU5400 nsU5800 nsU51.6 nsU5
3.2 µsU66.4 µsU612.8 µsU625.6 µsU6
51.2 µsU1102.4 µsU1204.8 µsU1409.6 µsU1
819.2 µsU161.6384 msU163.2768 msU166.5536 msU16
13.1072 msU1526.2144 msU1552.4288 msU15100 ms ±
µ
s for 25.6 µs, or
±2% ±
5 ns, only needs to be verified to ±25% to
2%U15
Also check the programming ICs, especially the carry pins (pin 13) of A2U17, A2U2, and A2U14.
5.2.6Output Problems
Check A2U9 for SAMPLE DELAY, A1R28 for MONITOR OUT. Also check J1 wiring.
5-6Manual 21568, Rev. D, Janaury 2001
5.3Sensor Element Replacement
This section describes how to disassemble the 80350A Peak Power Sensors, how to replace sensor
elements, and then to reassemble the Sensors. Refer to the diagrams on pages 7-3 through 7-7, as
applicable, while performing the following steps.
CAUTION
The 80350A Sensor contains Static sensitive components. Use
proper techniques including wrist straps, anti-static mats, tools,
soldering irons, desoldering tools, and proper non-static clothing.
5.3.1Disassembly of the Sensor
1.Remove screws (1) and (2). Take off the sleeve holder plate and slide the sleeve off of the cap
assembly.
2.Position the sensor so that the Analog PC Board (Assembly #21350) is visible, and locate the
sensor element leads. They are located on the end of the PC board nearest to the sensor
housing assembly. Remove the solder from the leads of the sensor element, and remove the
leads from the holes in the PC board. Straighten the leads.
Maintenance
3.Remove the two PC boards.
4.Unscrew the sensor housing assembly from the cap assembly. Use the wrench flats on the
Housing Assembly which are located closest to the cap assembly to remove the Housing
Assembly. The sensor element will stay attached to the Housing Assembly.
If the Spring Washers fall out when the sensor housing assembly is removed, they should be
replaced as shown in the diagram on page 7-5.
5.3.2Replacing the Sensor Element
CAUTION
Removal of the sensor element invalidates EEPROM calibration
factors.
(Cal Factors can be verified with a Vector Network Analyzer using procedures similar to standard power
meter sensors.)
1.Remove the old sensor element from the Sensor housing assembly by pulling the element
straight out from the assembly. Ensure that the center pin was removed with the element. If
not, carefully remove it with a pair of tweezers.
CAUTION
Do not twist the sensor element as it is being removed. Doing so
may damage the center conductor of the sensor housing assembly.
Manual 21568, Rev. D, February 20015-7
Series 8035XA Peak Power Sensors
2.Take the new sensor element out of its protective packaging, and carefully straighten the leads.
Do not pull sharply on the leads or they may come off.
3.Carefully insert the new sensor element into the sensor housing assembly. Gently push on the
sensor element to press the sensor element pin into the center conductor contact of the sensor
housing assembly. Once the element has been inserted, gently try to pull it back out of the
housing assembly. If there is resistance, the element is inserted correctly. If the element comes
out easily, then it has not been correctly inserted into the center conductor. Remove the sensor
element, make sure that the center conductor is centered in the housing, and then reinsert the
element.
5.3.3Reassembly of the Sensor
CAUTION
The 80350A Sensor contains static sensitive components. Use
proper techniques including wrist straps, anti-static mats, tools,
soldering irons, desoldering tools, and proper non-static clothing.
(Refer to the diagram on page 7-3)
1.Make sure that the sensor element leads are straight. Screw the sensor housing assembly into
the cap assembly. Be very careful not to damage the leads of the Element.
2.Place the element leads onto the proper pads on the Analog PC board (see page 7-3). The lead
from the Center pin goes to Pad 1, and the other lead goes to Pad 2. Solder the leads in place.
3.Replace the PC boards. Take care not to damage the sensor element wires.
4.After the element has been installed, it may be necessary to readjust the pulse response of the
amplifier due to a possible difference in the video resistance of the new element’s diodes in
relationship to the old element’s diodes. See Section 2.2 for checking and adjustment
information.
5.Slide the sleeve onto the cap assembly. Replace the sleeve holder plate. Insert and tighten
screws (1) and (2), and return the sensor to service.
5-8Manual 21568, Rev. D, Janaury 2001
6
6
66
6.1Introduction
This chapter contains the parts lists for major and minor assemblies in the Series 8035XA Peak Power
Sensors. A list of component manufacturers is Section 6.2.
80350APEAK POWER SENSOR, TYPE N, Rev. F
ItemPart NumberQtyCageMfr’s Part Number Description
ItemPart Number QtyCageMfr’s Part NumberDescription
R18RK45-11000165940M CR10EZFHFX10011.00K OHM 1% FILM SMT
R19RK45-41000159124RN73K2A1004F1M OHM 1% FILM SMT
R21RK45-11000165940M CR10EZFHFX10011.00K OHM 1% FILM SMT
R27RK45-11000165940M CR10EZFHFX10011.00K OHM 1% FILM SMT
R28RK45-004991——-RK73H2AT49R9F49.9 OHM 1% FILM SMT
R32RK45-000001——-RM73Z2AT0 OHM JUMPER SMT
R33RASD-3100015Y49184PR100K100K OHM POT 15T SURF MT
R37RK45-11000165940M CR10EZFHFX10011.00K OHM 1% FILM SMT
R38RK45-010001——-RK73H2AT1000F100 OHM 1% FILM SMT
R39RK45-010001——-RK73H2AT1000F100 OHM 1% FILM SMT
R40RK45-11000165940M CR10EZFHFX10011.00K OHM 1% FILM SMT
R42RK45-11000165940M CR10EZFHFX10011.00K OHM 1% FILM SMT
R46RK45-049901——-RK73H2AT4990F499 OHM 1% FILM SMT
R47RK45-049901——-RK73H2AT4990F499 OHM 1% FILM SMT
R53RK45-000001——-RM73Z2AT0 OHM JUMPER SMT
R54RK45-11000165940M CR10EZFHFX10011.00K OHM 1% FILM SMT
R55RK45-045301——-RK73H2AT4530F453 OHM 1% FILM SMT
R56RK45-045301——-RK73H2AT4530F453 OHM 1% FILM SMT
R59RK45-010001——-RK73H2AT1000F100 OHM 1% FILM SMT
R64RK45-010001——-RK73H2AT1000F100 OHM 1% FILM SMT
R77RK45-310001——-RK73H2AT1003F100K OHM 1% FILM SMT
R78RK45-310001——-RK73H2AT1003F100K OHM 1% FILM SMT
R79RK45-310001——-RK73H2AT1003F100K OHM 1% FILM SMT
R80RK45-310001——-RK73H2AT1003F100K OHM 1% FILM SMT
R81RK45-210001——-RK73H2AT1002F10.0K OHM 1% FILM SMT
R100RK45-120001——-RK73H2AT2001F2.00K OHM 1% FILM SMT
R101RK45-310001——-RK73H2AT1003F100K OHM 1% FILM SMT
R103RK45-210001——-RK73H2AT1002F10.0K OHM 1% FILM SMT
R104RK45-11000165940MCR10EZFHFX10011.00K OHM 1% FILM SMT
R105RK45-024301——-RK73H2AT2430F243 OHM 1% FILM SMT
R106RK45-11000165940MCR10EZFHFX10011.00K OHM 1% FILM SMT
R107RK45-010001——-RK73H2AT1000F100 OHM 1% FILM SMT
R108RK45-004991——-RK73H2AT49R9F49.9 OHM 1% FILM SMT
R109RK45-004991——-RK73H2AT49R9F49.9 OHM 1% FILM SMT
R110RK45-004991——-RK73H2AT49R9F49.9 OHM 1% FILM SMT
R111RK45-004991——-RK73H2AT49R9F49.9 OHM 1% FILM SMT
R118RK45-049901——-RK73H2AT4990F499 OHM 1% FILM SMT
R119RK45-120001——-RK73H2AT2001F2.00K OHM 1% FILM SMT
R120RK45-220001——-RK73H2AT2002F20.0K OHM 1% FILM SMT
R121RK45-310001——-RK73H2AT1003F100K OHM 1% FILM SMT
R125RK45-11000165940MCR10EZFHFX10011.00K OHM 1% FILM SMT
R126RK45-210001——-RK73H2AT1002F10.0K OHM 1% FILM SMT
R127RK45-310001——-RK73H2AT1003F100K OHM 1% FILM SMT
R128RK45-210001——-RK73H2AT1002F10.0K OHM 1% FILM SMT
R134RK45-149901——-RK73H2AT4991F4.99K OHM 1% FILM SMT
TP3ETI0-10018158900ETI0-10018BLACK TEST POINT
TP11ETI0-10018158900ETI0-10018BLACK TEST POINT
TP12ETI0-10018158900ETI0-10018BLACK TEST POINT
U1LD0S-00500158900LD0S-0050 050 NS FIXED DELAY LINE
U2LD0S-00500158900LD0S-0050 050 NS FIXED DELAY LINE
U3UFD0-00829124355AD829JRAD829JR VIDEO OP AMP
U4UFD0-00829124355AD829JRAD829JR VIDEO OP AMP
U5UFD0-00829124355AD829JRAD829JR VIDEO OP AMP
U6UFD0-00829124355AD829JRAD829JR VIDEO OP AMP
U7UFD0-00648124355AD648JRAD648JR BIFET OP AMP
U8UFD0-00648124355AD648JRAD648JR BIFET OP AMP
U9UID0-08043158900UID0-08043DAC8043FS 12 BIT D/A
U10ULD0-00611117856DG611DYDG611DY QUAD SPST SWITCH
U11ULD0-00611117856DG611DYDG611DY QUAD SPST SWITCH
Manual 21568, Rev. D, February 20016-9
Series 8035XA Peak Power Sensors
21353DIGITAL PCB ASSY (A2), Rev. W
ItemPart NumberQtyCageMfr’s Part Number Description
The names and addresses of manufacturers cited in the preceding parts lists are shown in Table 6-1.
Each manufacturer is listed under its CAGE number (COMMERCIAL AND GOVERNMENT
ENTITY), as noted in the parts lists. In a few cases, no CAGE number has been assigned.
Table 6-1: List of Manufacturers
CageSupplier NameAddressCityState
53387 3M3M Electronics Products Division6801 River Pl. Blvd.AustinTX
53387ITWPAN3M Electronics Products Division309 E. Crossroads Prkwy.BolingbrookIL
-----A&JA&J Manufacturing Co. Inc.11121 Hindry Ave.L os AngelesCA
This chapter contains assembly drawings and circuit schematics for the Series 8035XA Peak Power
Sensors.
Parts Lists for all assemblies are contained in Chapter 6.
7
Diagrams
Manual 21568, Rev. D, February 20017-1
Series 8035XA Peak Power Sensors
Special 11" x 17" landscape diagrams/schematics follow this page continuing
Chapter 7 of the Series 8035XA Peak Power Sensors Operation & Maintenance manual.
7-2Manual 21568, Rev. D, Janaury 2001
Series 8035XA Peak Power Sensors Index
Index
Numerics
5, 25 and 50 Watt Peak Power Sensors 2-2
A
About This Manual vii
Accessories 1-1
Analog Assembly Description 3-2
Analog Timing Diagram 3-3
C
Calibration and Testing 4-1
Calibration Problems 5-4
Circuit Description
Analog Assembly Descriptions 3-2
Analog Timing Diagram 3-3
Digital Assembly Description 3-4
Digital Serial Dat a Cycle Timing Di agram 3-7
Digital Timing Diagram, CW Mode 3-7
Digital Timing Diagram, INT/EXT Trig Mode 3-6
Commands for the 58542 2-18
Compatible Power Meters 1-4
Conventions Used in This Manual ix
CW Linearity Test 4-2
D
Delay 5-6
Delay Test 4-5
Descripti on 1-1
Detector Output Test 4-5
Diagrams 7-1
Digital Assembly Description 3-4
Descripti on 3-5
Digital Serial Dat a Cycle Timing Di agram 3-7
Digital Timing Diagram, CW Mode 3-7
Digital Timing Diagram, INGT/EXT Trig Mode 3-6
Overview 3-4
Disassembly of the Sensor 5-7
E
Equipment Required 4-1
EXTernal 5-6
G
GPIB Commands 2-15
Commands for the 58542 2-18
Reading Values 2-17
Setting Delays 2-16
Setting Trigger Modes 2-15
I
INTernal 5-5
L
List of Manufacturers 6-12
M
Maintenance
Diagrams 7-1
Dissembly of the Sensor 5-7
Reassembly of the Sensor 5-8
Replacing the Sensor Element 5-7
Rise-Time Adjustments 5-1
Sensor Element Replacement 5-7
Troubleshooting 5-3
Zero Adjustment 5-2
Measuring 3 dB Pulse Width 2-13
Measuring Pulse Droop 2-12
Measuring Rise-Time 2-14
O
Operation
GPIB Commands 2-15
Power Sweep Calibration 2-1
Sample Delay 2-5
Output Problems 5-6
Overview 3-4
P
Parts Lists 6-1
Peak Linearity Test 4-3
Performance Specifications 1-2
Performance Verification Tests 4-1
CW Linearity Test 4-2
Delay Test 4-5
Detector Output Test 4-5
Equipment Required 4-1
Peak Linearity Test 4-3
Trigger Level Test 4-5
Trigger Modes Test 4-4
Power Linearity Test 4-2
CW Linearity Test 4-2
Peak Linearity Test 4-3
Power Sweep Calibration 2-1
5,25, and 50 Watt Peak Power Sensors 2-2
Sensor Triggering 2-4
Trigger 2-3
Zeroing 2-3
Product Returns 1-1
Manual 21568, Rev. D, February 2001Index-1
Series 8035XA Peak Power Meters
R
Reading Values 2-17
Real Time Pulse Profile and Sample Position Display 2-10
Reassembly of the Sensor 5-8
Record of Manual Changes xi
Replacing the Sensor Element 5-7
Rise-Time AdjustmentsMaintenance
Rise-Time Adjustments 5-1
S
Sample Delay 2-5
3 dB Pulse Width 2-13
Measuring 3 dB Pulse Width 2-13
Measuring Pulse Droop 2-12
Measuring Rise-Time 2-14
Offset 2-11
Pulse Droop 2-12
Real Time Pulse Profile and Sample Position Display 210
Rise-Time 2-14
Sample delay operation 2-7
Sample Position 2-10
Setting Delay from Peak Setup Menu 2-8
Setting Sample Delay 2-7
Setting Sample Delay Off set 2-9