Agilent 8510C Introduction to New Features

Download

Introduction to New Features

of the

851OC

(Revisions

Revision

6.XX

6.30 and Greater)

HEWLETT

@ii

HP Part No. 08510-90276

Printed in USA August 1992

PACKARD

Edition 3

@Copyright Hewlett-Packard Co., 1400 Fountaingrove Pkwy., Santa Rosa, CA U.S.A.

95403-1799

Introduction to this Document Turn Power On Initial Setup Select Channel Display Modes

Four Parameter Displays Dual Channel Display Coupled and Uncoupled Channels

Alternate Sweep Measurement Markers Ramp and Step Sweep Modes

Channel/Domain/Parameter/Format/Response Memory Parameter-Dependent Trace Memory Parameter-Dependent Trace Math Date/Time Display Hardcopy Measurement Results Using an Internal or External Disc Define Non-Standard Display Colors Test Port Power Flatness Frequency List

Change Cal Type

Cal Kit Definitions

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1 2 4 5 5 6 6 7 8

10 14 16 17 18 19

20 21 22 24 24 25

Introduction to this Document

This is a quick introduction to new features of the revision 6.30 or greater firmware, first appearing in the HP 8510C. The presentation consists of keystroke sequences to execute the feature with explanation of the result and its impact on the measurement process. A working knowledge of the HP 8510 and basic familiarity with front panel operation is assumed, so only new features are explained. Demonstration sequences assume that you are using an HP (color display) executing firmware revision

C.06.30

or higher.

851OC

Turn Power On

There are now two line power switches. First turn on all other system instruments, then switch the LINE rocker switch on the bottom box to ON, then press the latching pushbutton LINE switch on the top box to ON. The self-test sequence will execute, the HP 8510 issues a device preset to instruments on the HP 8510 System Bus, then HP 8510 internal user-defined

Instrument State 8 is recalled. Since the previous user may have stored a personal favorite instrument state in register 8, the

network analyzer may “wake up” making any possible measurement. In order to start this demonstration at a known state, let’s first do an initial set up.

Initial Setup

These steps simply set the HP 8510 to a known state in preparation for the following demonstrations. Because the previous user may have changed the predefined color assignments, press:

This sets the color assigned to each (DISPLAY) element to the factory-defined value.

Connect

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Now we are certain about the contents of Instrument State 8.

(USER

PRESET)

Green key on bottom box.

The function of this key changes in the 6.0 firmware. Pressing this key recalls instrument State 8 but does not initialize system bus instruments. This sets the HP 8510 to a known state without disturbing devices connected to the system bus. Since instrument state 8 is defined by the user, it provides a convenient means to return the system to a state that you prefer.

Functions the same as

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and probably accompli&es

(green key). This simple recall is faster than

the same purpose. You can save any Instrument

State at any time in any of the 8 Instrument State memories. All eight instrument states are preserved in non-volatile memory,

The following steps guide a simple set of Response calibrations used later to show operating

features of the

HP 8510. As an alternative, perform a Pull 2-Port or TRL 2-Port calibration.

--,

Connect Short at Port 1

Connect Thru

(SZl]

fLOG MAGI

Start $1 calibration.

(or any appropriate cal kit)

Correction Turns On, C appears.

Start $1 calibration.

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s22

(or any appropriate

Correction

Start $2

Turn43

Cal.

cal

kit)

On, C appears.

(or any appropriate cal kit).

Correction Turns On, C appears.

Start $2

Cal.

[CAL]

(or any appropriate cal kit).

Correction Turns On, C appears.

Switch parameters Now we have:

cal set 1,

cal set 2,

cal set 3, and

cal set 4.

CORRECTION ON label shows Cal Set.

Select Channel

The HP 8510 uses two identical, independent data acquisition and processing channels.

~CHANNEL i 1

Switch Switch Parameter

Channel

Each channel can acquire, process, and display data for either one parameter, or four parameters. Any parameter can be measured on either channel. If the channels are Coupled, then the data processing and display program can share data between the channels; if the channels are Uncoupled, then each channel acquires and processes data separately.

Display Modes

The HP

Overlay. menu structure differs from the HP 8510B because the HP 8510B cannot produce the Four

Parameter display.

on the

851OC

provides two new DISPLAY modes, Four Parameter Split and Four Parameter

Each

Channel can now measure and display either one or four parameters. The

Switch Channel

Switch

Parameter

selects Single Parameter, in which the display shows the current parameter

selectedchannel.

Four Parameter Displays

The Four Parameter Overlay and Split Displays show all four basic parameters of the selected channel.

(DISQLAY)

This selects the four parameter display on the current channel. In this split display, the parameters are plotted in the same relative position as the PARAMETER keys.

Select Each Parameter

Note the Selected Parameter indicator which is an arrow-type annotation near the parameter label. Press a Parameter key, then select and change its Format and Response settings.

(CAL) Select Each Parameter

All four basic parameters are plotted in an overlay format. Press a Parameter key, then select and change its Format

Response settings.

CORRECTION ON label shows Cal Set.

Dual Channel Display

The Dual Channel Overlay and Split displays are unchanged except for the menu labels.

The Dual Channel Split and Dual Channel Overlay display modes show the selected measurement of a single parameter on both channels. To change the display of a channel, first select

that channel. When Coupled Channels is selected, the Stimulus characteristics (Sweep Mode, Source Power, Number of Points, etc.) are always the same for both channels, but almost all other functions (Parameter/Format/Response and Display and Domain) can be set

independently for each channel.

(-1)

(CHANNEL)

(-2)

then use the controls to set up the measurement for

(CAL)

Switch Channels Switch Parameters

(CHANNEL 1 I

(s21)

(-2)

CORRECTION ON label shows Cal Set. Notice Test Set forward/reverse indicators.

Channel 1 displays the Frequency Domain response; Channel 2 displays the Time Low Pass Domain response. Either channel can independently display either the Frequency or the Time Domain.

Coupled and Uncoupled Channels

When Coupled Channels is selected, turning on a parameter on both channels. By selecting Uncoupled Channels you can, for instance, apply a different mode. This

2-Port cal set to each channel. Uncoupled Channels can be used in any display

allows

many of the Stimulus functions, including frequency range and cal set assignments, to be set independently for each channel. Only certain of the Stimulus functions are always coupled (Sweep Mode and Number of Points).

cal

set applies the correction to that

(CAL)

CORRECTION ON label shows the Cal

Set.

Switch Channel Switch Parameter

Correction is now On for Channel 1, $1 and Off for Channel 2,

$1.

Alternate Sweep

The HP 8510 can alternately measure and display two different frequency ranges by selecting Uncoupled Channels with a Dual Channel display.

Shows Alternate Sweep

Select Single Parameter for Calibration

Connect Thru

(CAL)

Connect Port

1 to Port 2.

(or any appropriate cal kit).

Correction Turns On, C appears.

CORRECTION ON label shows Cal Set. Switch Channel Switch Parameter

Because Uncoupled Channels allows different stimulus settings for each channel, the cal set assignments are also uncoupled.

Measurement Markers

A list of one to five measurement markers can now be displayed in the menu area. The

(-MENU)

is displayed, pressing

blanking the menu area.

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f~R10f3

key is used to control display of this Marker Value List. When a top level menu

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move Knob

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(-MENU)

fjif(jR@

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(7GiGXX)

now causes display of the Marker Value List instead of

Select display of Marker Value List.

Last Marker On, Value in Channel

Marker Value List displayed in menu area.

Marker menu displayed.

Markers 1, 2, 3 displayed.

area.

Move Knob

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Back to Marker menu.

Five Marker List displayed.

(PRIOR

MENU]

Marker Value List Not displayed.

Select display of Marker Value List.

(jj’,

Select Marker, move Knob

(m‘,

Change Parameter

(-I)

move Knob

move knob

Selected Marker moves. Selected Marker moves. Markers for Current Parameter displayed. Marker Value List displayed.

For all Single Parameter and Dual Channel displays, the Marker Value List shows the value of all On markers. In the Four Parameter displays, the Marker Value List can either be a list of

all On markers or a list showing the value of the active marker on all four parameters.

Channel 1, Four Parameter; Channel 2, Single Parameter.

(PRIOR

wuu

Now the Marker Value List shows the value of the single active marker for each parameter.

Select

a different active marker.

Single Parameter Marker Value List. Shows one Active marker for each parameter.

Marker Value List shows all On markers.

Select another Marker.

Marker remains Active.

Select Four Parameter,

(PRIOR MENU)

Use Knob to move Marker

Marker/Parameter.

The one marker per parameter Marker Value List can only be selected for the four parameter displays.

Ramp and Step Sweep Modes

Operation of the HP 8510C when using the HP

changed. Using the HP

8360.series

sources offers a very significant upgrade to the network

8350.series

and HP 834x-series sources is not

analyzer system due to the improved data acquisition capability. In addition to improved frequency accuracy in the normal Ramp sweep mode and slightly improved speed in the

Normal Step sweep mode, design synergism between the new dedicated HP and the HP steps show advantages of each of these sweep types with the HP

851OC

provides a much faster fully-synthesized Quick Step sweep. The following

8360.series

The Ramp mode remains the fastest data acquisition mode. Using the HP

8360.series

sources.

8360.series

source

source, the first sweep learns the source/receiver Ramp tuning data. The second and following sweeps then have better frequency this effect. This is why the

accuracy than the first sweep. Change the Start frequency to see data may change slightly from the first sweep to the second and

subsequent sweeps.

Change

Sweep Time

Use the step keys and numeric entry to change the sweep time and use (MEASUREMENT RESTART)

to restart the sweep. (Rule for setting for Sweep Time:

Start fastest then slow until device response no longer changes with slower sweep time.) The HP 8510 automatically selects the minimum recommended sweep time, unless increased by the user. In general, depending upon

the frequency span, best ramp mode frequency accuracy and repeatability is achieved with sweep times from

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Note minimum Sweep Time selection. Increase Number of Points to see minimum sweep time

for each number of points. The minimum sweep time value for a certain number of points

depends on the system configuration.

With an HP

8360.series

source, the first sweep is relatively slow because the source and

receiver are learning the source step tuning data. The second sweep is faster. Press:

Dwell time sets the interval between phase-lock at the measurement frequency and the actual measurement. Use the Step keys and numeric entry to see the effect of changing Dwell Time. (The rule for setting Dwell Time is the same as for Sweep Time: Start at 0 seconds, then

increase dwell time until the device response no longer changes due to longer dwell time.) For

most applications set the dwell time to 0 seconds

Notice

dedicated cannot execute Quick Step. The following steps show differences between Normal and Quick.

the new keys, labeled

8360-series

sources

message will be displayed if your source

Press:

Sll

(CHANNEL

s22

In Quick Step, measurements for the forward and the reverse parameters are taken on

separate sweeps (1 Group=2 Sweeps).

In Normal Step, measurements for the forward and the reverse parameters are taken on the same sweep (1 Group=1 Sweep) 1

un ess

Note:

synthesized sweepers.

Uncoupled Channels is selected.

should always be selected with HP 834x-series or HP 836x-series

Now use the Four Parameter display to further visualize the data acquisition process.

Ramp mode sweep times slower than 500 ms cause display of a moving sweep indicator at the bottom of the lower graticules.

The data acquisition cycle is the same for this Four Parameter display and when 2-Port correction is turned On.

One parameter per sweep is measured, then the traces are updated on the last sweep

(1 Group = 4 Sweeps).

(STIMULUS MENU)

The first sweep measures the forward parameters, then the second sweep measures the reverse parameters. The traces are updated on the second sweep (1 Group = 2 Sweeps).

All four parameters are measured and updated in a single sweep (1 Group = 1 Sweep). In Ramp sweep, at the beginning of the sweep the source tunes to the lowest frequency, the

receiver phaselocks, then the source is swept continuously from the lowest frequency to the highest frequency. When the source needs to switch bands, or the receiver needs to retune its local oscillator, the sweep is stopped, phaselock is reestablished, then the sweep is resumed. HP

83600series

sources provide much-improved frequency accuracy in Ramp sweep because the source controls the measurement by issuing a measurement trigger when the source is at the appropriate frequency. For HP the

0-1OV

sweep ramp output by the source to determine the appropriate measurement

8350.series

and HP 834x-series sources, the receiver monitors

frequency.

Operation in Normal Step is unchanged. The source tunes to the new measurement frequency, the receiver achieves phase-lock, then all necessary measurements are made. Notice that in Normal Step, if four parameters are measured, the receiver is locked to the forward reference signal, the forward parameters are measured, then the receiver locks to the reverse reference,

for measurement of the reverse parameters. This means that at each point, the receiver must

synthesized sweepers. In Quick Step, the source is tuned from one measurement frequency to the next in

small

steps

allowing the receiver to track the source without breaking phaselock. This eliminates the need to break phaselock, then re-lock at every measurement frequency. Since the time required for the receiver to achieve phaselock is a major portion of the measurement cycle time for each point, this reduces the step sweep time considerably. Notice that the forward and reverse parameters are always measured on separate sweeps to avoid the loss of receiver phaselock when switching between forward and reverse reference signals. The result is that Quick Step sweeps are much faster than Normal Step sweeps with no penalty in the frequency accuracy and repeatability specifications.

Channel/Domain/Parameter/Format/Response Memory

Operation of the HP 8510 is simplified by this limited instrument state memory. This

structure defines a hierarchal memory that lets you set the network analyzer up for your

measurement, then return to the settings easily. In operation, when you select a Channel,

the last Domain, Parameter, Format, and Response settings are automatically recalled. This extends downward so that when you select a Parameter, the last Format and Response settings for that parameter on that channel, in that domain, are automatically recalled. In revision 06.00 firmware, this memory hierarchy is extended so that the

Trace

Memory functions can now be set and saved independently for each parameter on

each channel.

(CHANNEL)

C@i]

(SMITH CHART)

(yE)

(gi) (DELAY) CAUTO) (SiF) (Fimq pm)

(55)

(SMITH CHART) (AUTO)

Select each parameter

See that selecting the parameter recalls the last Format and Response settings for that parameter. Also notice the test set switching between the forward parameters, and the reverse parameters,

Sf2

and

S22*

all

Response functions and

S11

and

$1,

Select each parameter

This shows how the format and response settings can be defined independently for each parameter on each channel, then are recalled by selecting the channel- and parameter. Now the appropriate Response functions are individually coupled to the Parameter instead of the Channel.

[CHANNEL (RESPONSE

MENU\

Switch parameters to see effect.

Applies to all parameters on this channel. Same Applies only to selected parameter. Same Same

Same Same Apply to both Channels. Separate for each Channel

When you save an instrument state, all current settings, including the complete C/D/P/F/R

limited instrument state, are saved.

Parameter-Dependent Trace Memory

Revision 6.0 and greater couples the display memory to the Parameter instead of to the

Channel. Now, each memory display or trace math operation can be independent for each parameter.

(CHANNEL) (DISPLAY)

Select Each Parameter

Observe the

trace memory. The Factory Preset condition is that Channel 1 parameters

are assigned non-volatile memories 1-4, respectively.

annotation. Now each basic parameter is assigned a separate

$1, $1, S12,

(CHANNEL 2)

Select Each Parameter

I..“..“..” .“. “...- . .

. . .

. . . . . . . . .

Observe

~.~~.~.~~.~.~~~~~~~::~ ~~~~~~~~~~~~~~~~

:. .

. . . . . . . . . . . . ..

. . . . . . . . . . . . . .. . .

~~~~~~~~~~~~~,..~..~., *.... . . . . .pI...&.&.;

parameters Srr,

. . . . . . .

.:.cx:s. . ..z-%v.:.. . .

.,............ n.

. . . .

” . “..“...”

$1, S12,

“..“..

..”

5-8, respectively. .

Switch channel Switch parameter

““...”

.!p%ytm.%

...”

. . . .

Observe

.“.....,.................”

the ~~~~~~~~~~~~~~~~~~~~

gg&.&.:*..L.

. . .

““... ..” .,........”

.“.“........“..-......““.““.““.“””.””....”..”.

notice that any trace memory can be assigned to any basic parameter on either channel.

.Ys::.zz%m” . . . . . .

-““““.““-~~~~~~~.~.~.~~~.~~~~:~~~:”~:

. . . . . . . . . I.

.. .. . .. . ..

. . . . . . . . ...” . . . . . . ... . . . . . . . . a . . . . ““.” . .. .

~~~~~~~~~~~~~~~

::...~r...j.~. .d ....;~.~......~..~...' ...~.. '..L..~~

~:~.~:~*~*rr.r~~~~.~r~::~~:.~:~~:

. . . . . "."X...".""--~"

""'~*:~...::::::~:::.~~:.~.~:::"~.~

A% . . .. . . . . . . ..I . . . . . . . . . . . r:

;... ..,.' ..*...,. . . . . . . . . . . . Ia *...: . . . . ..*. g.&..q*

~~,~.~~~~~~~~~~.~.~~~~~~~~~~~~~

'~::::~::::..::::~.::::::~.::~:~~::::~..~.~:~:::::::~.~~:~::; Y.Y:::.

Change port connection

..,C.".

." .."...................... "." . . . . . . .. . . . . .

I.“..“.....

..‘.,.......,..”

. . . . . . .

“..I...”

..A...

. . . . . . . . . . . . . . ...” . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . .

. . . . .

;.. ;*..#&!*y&.&.&.;.y

annotation.

;~.:I:;.““~~~.~~~:.~..~.~.‘~~~~..

and $2 are assigned volatile (contents lost with power Off) memories

.,....

. . . . . . . . . . . . . . . . . . . . . . . ...” . . . . . . . . . . . .

. . . . . . . . . .

...” .“...” .

. . . . . . . . . .

..“.I”.........

. .

..‘................”

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

::..:j~~~~;:~:;:;;.:~~:~~~~~~~::.

. . . . . . . . . . . . . .

..I....... .

..I......

. . “.’

..""..".." . . . . . . ...* . ..- . . . . . . . . . . . . . . ...'~~"~.*7~y&-.~~ .,.....

.+"...... . . . . . ..""...........................

.".." . . . . . . . . . "..."".I . . . . . . . . .

. . . . . I"."" . . . . "I" .. . .

~.~*~jy".-.T.t- ""'

"........" . . . . . . "..._..."".".." . . . . . I

. .. . . . . . . . . . . . . .

. . . . . . . . . . . .. . .. . ... . . .. . .. . . .. .. . . . .

$. . . . . . . . . . . . . . . . . . . . . . . . .

. . . .

..a..................-

..:.:;::.::~~~.~~~~~~~~.

&.*C>...

..." . . . . . . .. . . . .

annotation.

“.

The Factory

Preset

condition

. . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . .

._.......

the ~~.~~

. . . . . . . . . . . . . . . . . . . . . . . . . . .

. ... .

. . . . . . .

..-... a

.“”

. . . . . . ..

-...

Using

that Channel

key and the (MENU)

and

key,

For the standard memory and color assignments, the trace memory is displayed using a different color than the measurement trace. Notice the annotation following the parameter

label. The parameter label shows the trace color and the following label shows the trace

memory color.

(PI~RAMETER MENU)

Select User Parameter

Notice that the user parameters share memory assignments with the basic parameters: with al; $1 with b2;

Slz

with a2, and $2 with bl.

Parameter-Dependent Trace Math

Revision

6.0 couples the trace math to the parameter instead of to the Channel. Now, each

parameter can display independent trace math operation.

Change Channel

Change Parameter

key and the

assigned to any basic parameter on either channel. Note that the

~:::~:.~~::“~~~~:z~=;~.~~~~~.~~~-~~..~~~~

---“**-.-*“-

~~~...~~,~..~.:.~.:~~.~.

. . . . .

.’

..*+&;~~

:’

. . . .

,“‘. .*..

~~~~~~~~~~~~~~NN~~~~

~~~~~~~~~~~..~~..~.....

. . . .

TA%.?.-.,

**-*-*

(m)

selection applies only in either of the Dud Channel &splay modes.

key, notice that any math operation can be

Date/Time Display

The HP displayed. Press or

85lOC

now shows the current date and time. It is displayed whenever a menu is not

(PRIOR]

until the menu area is blank or replaced by the marker value

list, then the date/time display will appear. Set the time and date as follows.

Date/Time displayed when menus Off. Date/Time never displayed.

Shows date/time.

“...” . . . . ..-.“.“..-.............---...“”

(set date and

time)

““.“..... . . ...“. “.--.““..‘-’

>7.-..v.- . . . . . . . . . . . “” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

:~~~~~~~~~~E~~, jxll sets seconds to zero.

“““.&.*.a.&z

*.... ~.~.~.~~.~~~...~..~.~.~.~.~...~~.”.

&b”..““.... . . . . . . . . . “.““.........I............_

.”

. . . . . . . - . . . .

. .. .

. . . .. .. . . . . . .

. . .

...” . . . . . . . . .. .

. . . . . . .

-’

Hardcopy Measurement Results

The HP 8510C adds two fully buffered RS-232 ports to allow connection of hardcopy devices, and the revision 6.30 or greater firmware can support either a line printer, graphics plotter, or

graphics printer.

Output to Graphics Printer Output to Digital Plotter Output to Line Printer or Graphics Printer

These three choices select the output device. Plot to Printer selects output of the current

CRT display to the graphics printer. Plot to Plotter selects output of the current CRT to a

digital plotter. List Trace Values selects output of a formatted list of values to a line printer. The measurement process halts until output to the buffer (RS-232 port) or device (HP-IB) is

complete. A message such as PLOT COMPLETE is displayed, then the HP 8510 resumes the measurement process.

The hardcopy devices can be connected to the HP 8510 system bus. Connect the hardcopy device, then use the Local menu to identify the location of the device.

Each

Its-232

connected

the HP 8510

address. The Copy

COPY

port is output-only and

to RS-232

.menu

port

then press

System

Bus, press

also lets you define certain details about the printing and plotting output.

8510

System Bus (not buffered) Larger memory buffer (400 kBytes) Smaller memory buffer (100

“-..“-.*~.~~..~=.~.~

“-~~~“-“““=~~.~~~~~~~.

.....

““.”...-.

........I...............

H *:

....f.........................

........................

..........................................

“..“” z..

~“-~“~~~~~~~.“-~~~~~-”

..-...

........

.y.~..~~~...~~~

..‘l’......

......

..........

..“. ...

-.-

........

...........

....

..s; &.

.y.

ii.%.-.

.......

...........................

” ..--

..” -.-... -.

I..

...............

......

.%-.

...

......................

..... .

,““..”

......

I.....“.....“.

..”

...

.”.........

......

........

... ...

Output to Graphics Printer. Graphics Printer or Digital Plotter. Line Printer or Graphics Printer.

...

.. .-.

......

“I.-..““-..“...“.-..~.“”

.........~

AZ..

........

-.%z.::

.............

..“.

....-

..........................

..............

-............-.

.....

..,.....-.

....

...

.......”...

I..“....‘..“...-... .-.

kBytes)

and enter

the

printer

Use these menu structures to define the printing, plotting and list options.

Use the knob to move the small up-arrow to the desired character, then press

When the name is complete, press

name for the last file to be stored is displayed, allowing you to use the

to change the file name rather than entering the entire file name. To

-~~~~~~I__=~~~

Tz....-.“-a..”

._...”

. . . . . . .

..m. ““.”

. . . . . . . .

Notice that the file

’ @$@@&~A~~~

. ...;

*.e.‘.5*.

zzs

. . . . .

ZC-%S.Cm--d

To load a disc file:

. .

.--y&G.

“.&.&.

.&.=.

key and

. ..-’

(Select file type to load)

A directory listing all files of thist

to the desired file name then press ~~~~~~~~~~~.

Define Non-Standard Display Colors

The HP The appearance of each element of the display is defined as a specific combination of three attributes: Tint, the actual hue; Color, the percentage of tint; and Brightness, the relative intensity of the color.

851OC

uses 16 predefined display colors out of the 4096 possible colors available.

Select display element Define color

You may select one of the 16 predefined colors for the current display element, or define a different color using the COLOR, TINT, and BRIGHTNESS functions.

Save user-defined colors

Recall factory predefined colors Recall user-defined colors

There are two sets of color memories, the User Colors memory and the Default Colors memory. Both color memories are part of the hardware state. When you select the

current color assignmen

Stan&d colors by pressing

pressing ~~“~.~~~~~~~~~~~.

...

..-~:*.~~~~~~.---..~~.~~~.~::::~~**~

“.

................... .....

......... f...‘.........*.....

...

.....................

.............

y .?.

..I.

.....

..-.yy>+.*~..*~

.......

>.,

.....................

....

..................

..q...::Yts: .‘. t.v&.....*

..........................

”..

..............................

........

ZZS..&Z.%W.%M.~.d.“.A..

Colors are not changed

element are saved. You can switch back to the

Switch back to the factory predefined colors by

(USER PRESET)

Test Port Power Flatness

This new feature is only available with HP

8360.series

sources. Within the leveled power limits of the source, it allows the user to select a value for constant power output versus frequency at the point at which the device under test will be connected. It is important to

recognize that variations in loss versus frequency in the signal path between the source output and the test port are removed, but the power level will vary according to the impedance of the

device under test because the source is leveled at its output, not the test port. The flatness calibration process consists of connecting a power meter to the point at which flat power is desired, then measuring the difference between the source leveled output power and the power meter reading. This difference is stored as an offset. When flatness is turned on, the source adds this offset to its set power level, thus achieving constant power level versus frequency at the test port (assuming constant device-under-test input impedance).

Detailed information on this feature is contained in HP Product Note 851046. The following is a general sequence for using the feature,

Set desired frequency range

In general, perform the procedure using the widest frequency range you will use in following tests. After the flatness calibration is performed, you can select any subset of this frequency range. Although the signal path loss is measured only at the specific points included in this calibration step, the system interpolates the loss at frequencies between the measured points.

=*.;

....

-:a .

....

“.y....

.............................

./*a

.....

........

......

.....z.

....

.....

.. .

.......

.+....+..>:<.::i~ x

......

............

....

...

......e....

Because the signal path loss is interpolated

.....

“..?.........

q$y.~~*gq$., ~.~~~.~~..;.~..~

..........

~UMBER~~~~,~~~~~,~~N~~

~ &.L 2......

*&.&.,

&+.&$#&” “~~.&.~.&.‘&.~&.~......

.............

...........

......................

.....

.....................

.. . ...............&.- .”...A.“....

.........

.............

......

..“.....

........

~,,~.~~.-.-.~Y

.*.-i

. .

”...

.......

“...“““........“.

“..““.

.-A,.xk:h.:ii...:...;:.

......

.......

...

;A..+..“‘7~::

...........................

““.

...................................

......................................

*;.:.>:

...

“....

..............

. .

..............

*:::***:::

More points require more time for the calibration. between measured points, you may also perform the calibration using a frequency list with

fewer points.

Do not exceed the maximum leveled power rating of the source during the calibration step. If the source power is set so that it becomes unleveled at any frequency, the offset value measured for that frequency will not be correct.

(Turn Flatness Off before starting.)

(Wait to complete)

Observe the power meter reading as each point is measured. The Message area of the

shows the percentage complete. Pressing any key will abort the calibration process.

Turn

Flatness On.

CRT

With Flatness On, the

active function applies to the power at the test port,

not the power at the source output. Now the maximum flat power available at the test port

will depend upon the source maximum leveled power capabilities and the loss in the signal

path. For example, if the source maximum leveled power over the current frequency range is

+I()

dBm

and the loss in the signal path between the source output and the test port is 15

dB, then the maximum flat power available at the test port will be -5

dBm.

Allows time for power meter.

Observe Power meter readings, should be Source 1 Power Value. The following steps provide a means to verify that the power is flat at the test port.

.~~~.“~..-“.“.~.~~“-..”

.......

..............

&.+&.y...~

szllr

.t..

.................

...‘.““.

.~~~~~~~~.~..~~~.~~.~.~~~~~~.~ ~

....”.

............

.“.. .a

...............

.“..:.-.:..............:.~~~.~. .):.’ ..I.

.........

.-..:4....&.I.-. z.vT.7..

”

(RESPONSE

..~~.~:.~?~~.‘.....~~

.......

......

......“........................

......

....

I..

.....

. ..7*~ .;

....

...

..”

.....

........x

...

........&..&....‘......

....................

............

&.$*.*y

... ..%%

MmJu)

g&y..

......

.”

.........

............

.............

. .

........

..........I........”

...

.........................

.~.~~.~~..~~~~~~~~.~~~~

...........

............................................

~~~~,~~

.........&. ....

..“.

..........

“.“l~..~~..;.

.......

:.~:

.....

(Set to same as Source

Power)

Compare Power

fgfg+.“.q~g7~~

‘....+z .

..*..

7..

.%z.~.~+

pfgJJ!Jxm

5J$4%g$~*~~~~~Lz~~

. . . . . .. . . . . . . . . . . . . . . . . .

&J... . . . .

. .

;~~EE&.@IM&

. . . . . . . . . . . . .

&&&.&&.z.“&.&.&-.~*~j~~

..-.... ...3

..F=

(0.5) (xl)

Change Source Power

The trace should change dB/dB if flatness is maintained.

Change Number of Points

Change

For frequencies

F’requency

outside

Range

the calibrated

Source interpolates between points.

range,

power at the source output, not at the test port.

Meter, Marker, Test Port Power.

active function

applies

Frequency List

The

Frequency

List capability has not changed from revision 06.0, in that the frequency list

can consist of up to 792 points. Note that frequency list always uses Normal Step.

Change Cal Type

There are applications in which it is not possible to use a

2-port

calibration for measurement because automatic switching of the test set cannot be tolerated when the device is connected. For these applications, it is typical to perform a l-port calibration for the reflection parameters and response or response and isolation calibrations for the transmission parameters. There is a subset of these applications where the automatic switching can be tolerated during calibration, but not during the measurement. For these applications, the HP 85lOC includes the new Change Cal Type feature.

To use this feature, first perform a FULL

2-PORT

or TRL

2-PORT

calibration procedure,

then proceed as follows.

Turn

2-Port

Correction On

Select new cal set

Select a different cal set to hold the new l-Port calibration; the new l-Port cal set will be

stored and turned

lbrn

Original

Select new

cal

2-Port

set

Correction On

Select a different cal set to hold the new l-Port calibration; the new l-Port cal set will be stored and turned on.

Cal Kit Definitions

All calibration algorithms are unchanged except that the TRL 2-Port procedure can now use either a LINE or a MATCH standard. A match standard is a Load or Arbitrary Impedance type standard whose impedance becomes the system reference

load type calibration standards for high frequency measurements in media other than coaxial

or waveguide.

20.

This allows use of fixed

In coaxial TRL

lowband

the TRL 2-Port calibration. To do this, modify the load to the Line class for use over the frequency range specified for the part of the calibration. During the calibration, measure the load instead of performing the

Lowband Reflection procedure.

fixed load) at low frequencies instead of performing the

cal

kits it also allows redefinition of the

cal

kit to use a Match standard (the

Lowband

cal

kit definition to add the

Lowband

Reflection part of

lowband fixed

Reflection

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LOCATIONS

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Customer Order Number

08510-90276

Printed in USA July 1991 Edition 2

PACKARD

Agilent 8510C Introduction to New Features

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Turn Power On

Initial Setup

Select Channel

Display Modes

Four Parameter Displays

Dual Channel Display

Alternate Sweep

Measurement Markers

Ramp and Step Sweep Modes

Channel/Domain/Parameter/Format/Response Memory

Parameter-Dependent Trace Memory

Parameter-Dependent Trace Math

Date/Time Display

Hardcopy Measurement Results

Define Non-Standard Display Colors

Test Port Power Flatness

Frequency List

Change Cal Type

Cal Kit Definitions