Download Variable Persistence / Storage

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Variable Persistence / Storage
Models 1741A, 1744A
.
.
200 cm I JJ.Svariable persistence
& stored writing speed
Minimum blind time, auto-intensity
.
.
Dual channel, 5 mV I div to 100 MHz
3rd channel trigger view and selectable input impedance
1741A Opt 034
1741A, 1744A Variable Perslstence/Storage
Hewlett-Packard Variable PersistencejStorage Oscilloscopesprovide a Moneoscilloscope"solution 10the wide variety of measurements
encountereddaily. The versatility results from the multitude of operating modes available; starting with minimum persistence.which approximates conventional operation. through continuous persistente
settings. alt the way to automatic storage. The adjustable persistente
control provides the ability to match signal and persistente characteristics resulting in excellent display characteristics over a wide range
of conditions.
speedsare achieved without reduced scansor excessiveblind times.
Operating in the variable persistencemode. high speedsignals can be
scanned witholit transfer or erase time (typically 1 second) necessary
in other storage techniques. The probability of displaying a random
event is increasedby decrcasing the blind time by a factor of 1000 or
more in most situations.
Appllcatlon8
These oscilloscopesprovide a clear display of virtually any signal;
however. they are especially useful in certain applications. Low repetition rate signals at fast sweepspeedsproduce very low light output
on conventional CRTs and normally require the useof a viewing hood
to obtain a viewable display. The variable persistente mode solvesthis
problem by integrating several sweeps to amplify the light output.
thereby producing bright, clear traces. This ~Iight-integrating" capability is also useful in eliminating flickering displays, which are thc
result of low repetition rates and slow sweepspeedsignals. These signals are annoying to view and even more difficult to measure;however, the display is improved by matching signal and persistente
characteristics.
Single-shot events are also captured easily by using the auto-store
mode, which, once set, will wait and capture a sweep after the first
trigger event. During operation of the oscilloscope,any display on the
CRT can be savedat the touch of a button, no matter what mode the
instrument is in.
Wrttlng Speed and Blind Time
In all Hewlett-Packard storage oscilloscopes,the advancedtechnology usedallows signals to be captured at the maximum writing speed
in both variable persistence and single-shot modes (1741A-200
1.
cm/ ilS: I 744A-1800
cm/ IlS: 1727 A-2000 cm/ ilS). These fast writing
-
A Comparison Fast Wrlting Modes
HP's Variable Persistence Mode
2. Transfer Techniques Not Used in HP
Variable Perslstence/Storage ascHloscopes
blind time ImlrnmumI
-':~~~/"""~--7"-{
resel
1 SecOl1OI
I
Y
erase transter noldoll wall für Irlgger
~w,
.
.
1800 cm I JlS variable persistence
& stored writing speed
Minimumblind time. auto-intensitycircuit
.
.
.
Dual channel5 mV Idiv to 100 MHz
3rd channel trigger view and selectable input impedance
17«A
1741A, 1744A 1727AOperation
An auto-intenlity circuit in all of thesevariablc
ablepenisteftcc!storale
~i1I~pes
simplifies operation. Tbis circuitit pennits
pc
sharp,ffickerfree, non-bloominl traces to be obtained in the
tbc variablepenistencc
mode undcr almost 111operatinl conditionl.
~--Thcre il a varicty of scttinp availablc in tbc
variable persistencc modc; howcvcr. there is
In casily set rcfcrcncc position that will providc a vicwablc tracc: Intcnlity-max.
Pcrsistcnco-min. Brilhtncss-min.
From this
position. Intcnsity can be dccrcasedand Persistencc can be incrcased u neccssary.
In addition to tbc variable persistcncc
mode. storage LEDs providc positive idcntification of storalc operating modes. Thc
auto-crasc mode periodically takes individual Mana..hou" of In input silnal. In this
mode. Persistcncc il intcmllly ICt to maximum and tbc pcrsistcncc control rcgulatcs
how frequcntly a ncw Msnapshot"il captured
and displayed whcn two or more channcll Ire
displayed. Tbc requircd number of swce..
are capturcd before I ncw cyclc is initializcd.
This mode offcrs "hands-off"' operation for
probing circuiu and I convenient method of
quickly lettinl thc focu and intcnsity for
single-shot cvenu.
The auto-storc mode makel single-shot
II
J
evenU euy to capture and rcduces the possibility o( rccordinl tbe
wronl cvent by automatically switchinl to the cIOnnaI triuer m<Xie.
Tbe ~1I~pc
automatically switches from :I .write. mode to a
Mstore" mode after the sweepof the single-shot event for maximum
trace retention time. A "store" LED indicates that the event js cape
tured and one press of the Store/Display button displays the stored
tracc.
Exceptlonally fine trace in the verieble persietance mode permits high resolution timing mee.urements e. shown wlth this
dual trace, alternate .weep di.play at s sweep speed of
5 n./div.
OSCILLOSCOPES
Models 1740A, 1741A, 1742A, 1743A I 1744A (cont.)
DI11e'8nU.1Time M...u,ement AccU'KY
(Usingoneintensificdmarkerand helidialcontra!)
Vertical Dt.play Mode.
div. 1744A) input step.
Deflection F8ctor
Range.: 5 mV /div to 20 V /div (12 calibrated positions) in 1.2.5
scquencc.;lttcnuator accuracy :t 3%.
Vernier: extends dencction ractor to ~50 V /div.
Polarity: channel B may be invened.
Input coupllng: selcctable AC or DC. SOO(dc). or JTOUnd.
Input RC l.elect8ble): AC or DC, 1 Mn :t 2% shunted by - 2OpF;
50!},501) :t 3%, SWR ~ 1.4 at 100 MHz.
Maximum Input: AC or DC. 250 V (dc + peak ac) or 500 V pop at
.s 1 kHz; 500, 5 V rms.
A + B Operation
Ampllfler: bundwidth and denection factors are unchanled: channel B may be inverted for A.B operation.
Dlnerentla' IA-B) common mode: CMR is at least 20 dB from dc
to 20 MHz Common mode signal amplitude equivalenl to 8 div (6
div. 1744AI with one vcrnier adjusted for optimum rejection.
Ve,tical Magniflcation
(X5)
Bandwidth: 3 dB down from 8 div (6 div, 1744A) referenc:esilnal.
DC-coupled: dc 10 ~40 MHz; dc to ~30 MHz rar 1741A. 1744A.
AC-coupled: ~ 10 Hz to 40 MHz: ~IO Hz to 30 MHz for 1741A.
174~1\.
RI.etime: .s9ns. .s12nsror 174IA.1744Almeasuredrrom I~to
90~ points or 8 div. 5 div 1744A. input step).
De'lectlon 'Ktor: incrcasessensitivity or 5 and 10 mV settinp by a
ractor or 5 wilh max sensitivity or 1 mV on channcls A und B.
Trigger Sourc8
Sclcctable rrom channel A, channel B. composite. or line rrequency.
Trigger Vlew
Di!Öplaysinternal or extcrnul trigger signal. In Alternate or Chop
mode,channcl A, channel B, and the tri gIer silnals are displayed. In
channel A or B mode, trigger view overrides lhat channel. Internal
trigger signal amplitude approximutcs vertiQI signal amplitude. Ext
trigger signul dencction ractor is 100 mV /div or 1 V fdiv in EXT +
10. Triggering point is approx center scrcen. With identiQlly timed
!iignals to a vertical input and the EXT tri gier input. trigger signal
delay is ~3.5 n!Ö.
Horizontal Display Modes
Main. ~timc with channcl A or B ~tart (1742A, 1743A). main intensiricd. mixed (except 1743A). delaycd. mal X 10. and A vs. B.
Main and Delayed Time Ba...
Ranges
Maln: 50 n!i/div to 2 ~/div 124 ranges) in I. 2. 5 sajuence.
Delayed; 50 n!i/div to 20 ms/div (18 ranges) in 1.2. 5 ~uencc.
Accuracy
--
'.,..,118
...~
11
SOnsto20ms
=3~.
:2".
:3"'"
,4'4
:3\
:4\
0'C1o+!S'C
+IS'Cto+3S'C
+3S'Cto+SS"C
'Add1~1or50_1o2.~
M.in
sweep .ernier: extendsslowcstswcepto at lcast, s/div,
Magnifl., (X10): c~tcnd!i fastC!itswcep to S n!i/div.
Calibrated
Sweep Delay (.xc.pt
Oelay time ,.nge:
~~lmindl:l;lyI50ns).
1743A)
0.5 tu 10 X Main Timc/Div
~ttinl5
of 100 ns to
!(O.5\_,...
!(I\ 01r.-.
tOl\- 11)
+0.1\ 0111)
Differential Time Measurement Accuracy (1742A)
(Uaing ~time dual inlensirted markers)
.. s.IIC
~T-.
.,...
--.,-(+IS.C.+Boq
~ftlO
2s/cIv
.t(1\0Ire-.
+O.1\oIkI
:(1\01""
+01\0111\
!(1\0Irta-.
+0.1\01151
t(O.5\
~(O.5\~,
+0.1\0111)
01""
+005\0111)
:(0.5\
~
+0.05%0111)
~
01,...
E8M--
2Orns/*'
M'.
AC-coupled: ~ 10 Hz to 100MHz.
Bandwidth limit: limits upper bandwidth to -20 MHz.
RI.e time: .s3.5 ns mcasured from I~ to ~
points of a 6 div (5
'-wr-(+IS.C.+.oq
lOO"./cIwto ~.../cIw
SOrns/Öfto2,/cIw
.Add"Ior"".".-'O"c
10+'S.C..+..C. +8I"c.
Det.y jltter: <O.OO2'*'
(I pan in SO000) of maxdelayin cachItep
from +15.C to +35.C; <0.005%(I pan in 20000) from O.C to
+15.C and +35.C to +50.(.
100
Channei A: channel B; A and B displayed alternatelyon successive
sweeps(ALT); A and B displayed by switchinl between channels at
,.250 kHz ralc with blankinl durinl switchinl (CHOP); A plus B
(Algcbraic addition); and triller view.
Ve,tlcal ampHfle,s (2) Bandwidth and Rise Time at all denection
factors from O°C to +55"C.
Bandwldth: 3 d B down from 8 div refcrence silnal: 3 dB down from 6
div rcfcrcnce signal for 1741A. 1744A.
DC-coupled: dc to 100 MHz in both 500 and I Mn input modes.
..n...s.IIC
to
1740A, 1741A, 1742A, 1743A, 1744A
Specifications
'Add " tor lomp_O'C
10+IS'C 8IId +~'C 10 +.'C.
"On 100ftl/diY rM98. lpdic8lioIlpplM
1ft. fir8t CIIIoIMlIR IWMP.
. . . Add DYN ICconcy
Time Interval (.lTim8) 1742A
FuncUon: measurestime interval betwcen IWOevents on channei A
(A display); Iwo eventson channel 8 (8 display); or Iwo eventJstarting from an cvenl on cithcr channcl A or 8 and ending with an cvcnt
on cithcr channcl A or 8 (allcrnatc display).
Tim. interv81 output von.,.:
varies from so V 10 100 mV fun
scalc. Fun scaleoutput voltage can be dctermined by multiplying Ihe
number on Ihc Time/Div dial by 10 V (c.g. 0.05 s, 0.05 ms, or 0.05 pS
per div givcs 0.5 V OUIPUIfull-scalc).
Stability (O"C to +SS"C): shorl-lerm O.005'J,. Tcmpcralurc.
:t 0.03%/'C devialion from calibralion Icmperalurc range.
Crystal Referenced .lTlme (1743A)
D.laytlme '8nge: 0 to 10 X Main Timc/Div settingsof 100 nsto 2s.
Dlfferentl81 Ume m.asurement accurecy
Accuracy: :t 0.002% of rcading :t I count from + 15°C to + J5 'C;
:t 0.005% of reading :t I counl from O°C 10 + I S"C and +35'C 10
+SS"C.
Time RelOlutlon 01 :t 1 Count
s-.-.,.
0140.2-.0.5-
%1~
~I.ps
1,s,2-.510-.~
o.l...G.2..U..
~I'"
%10..
%1.'"
loa
la
I.
*CI
Readout: 5 digit LED plus e~ponent.
Crystal Aglng: O.1XX>5~
per year.
Delay litter: same as other 1740 seriesoscill~opes.
Triggering
Maln Sweep
Normal: sweepis triggered by internat or e~ternal signal.
Automatlc: ba!iClinedisplayed in absenceof input signul. Above
~40 Hz. Iriuering is same as normal.
Single: sweepoccUß once with same triuering as Normal. Reset
arms sweep and fights indicator. (174IA. I 744A) Single sweep is
also initiated with Erase. sweepis armed after the erase cycle.
Internal: dc to 25 MHz on sianals~O.3 div verticaldenettion.increasing 10 I div vertieal denettion at 100 MHz in all display modes
(required signal level is increasedby 2 when in Chop mOOeand by 5
when X5 vertieal magnifier is used).
!xternal: dc to 50 MHz on signals of SOmV popor more. increasing to 100m V popat 100M Hz (required signal level is increasedby
2 when in Chop mode).
Delayed Sweep (SWHp After Delay)
Auto: dclayed swcep starts at end of dclay period.
Trig: delayed sweeparmcd lInd triggerablc at elMl of delay periOO.
Internal: same as Main Sweep e~ccpt 1743A is dc to 25 MHz on
signals causing I divor more vcrtical dcncction. increasina to 2 div
of vertical dcnection at 100 MHl.
external: ~mc ilS Main swcepe~CCpt1743A is dc to 50 M Hz on
~ignal.5100 mV pop increasinl to 200 mV popat 100 MHz.
8
(hP]
OSCILLOSCOPES
8
(",]
Externallnput RC: ~ 1 MO shunted by -20 pF; max external input,
250 V (dc + peak ac) or 500 V pop at :S 1kHz.
Level and .Iope: internal, at any point on positive or negative slope
of displayed waveform; external, continuously variable from + 1 V to
-1 Von either slope of trigger signal, + 10 V to -10 V in + 10.
Coup"ng: AC, DC, LF REJ, or HF REJ.
Trigger holdoH (mein .weep): increasessweepholdoff, a11ranges.
Calibrated MIxed TIme Base (except 1743A)
Dual time base in which the main time basedrives the first portion
of sweepand the delayed time basecompletesthe sweepat the faster
delayed sweep.Also operatesin single sweepmode.Accuracy, add 2%
to main time base accuracy.
A va B Operation (deleted wlth Opt 101)
Bandwldth: channel A (Y-axis), same as channel A; channel B (Xaxis), dc to 5 MHz.
Oeflectlon factor: 5 mV jdiv to 20 V jdiv (12 cal positions) in 1,2,5
sequence;phase differente between channels, <3°, dc to 100 kHz
(75 kHz, 1743A).
Cathode-ray Tube and Controla (1740A, 1742A, 1743A)
Type: 12.7cm (5 in.) rectangularCRT, postaccelerator,-15 kV
acceleratingpotential,aluminizedP31phosphor.
Gratlcule: 8 x 10div (I diva 1 cm) internatnon-parallaxgraticule,
0.2 subdivisionmarkingson major horizontaland vertical axesand
markingsfor transitiontime measurements.
Internatnoodgungraticule illumination.
Beam finder: returnstraceto CRT screen.
Z-axl. Input (Inten.lty modulation): +4 V, ~50 ns wide pulse
blankstraceof any intensity,usableto :S10MHz for normalintensity. Input R, 1 kO :t 10%.Max input :t20 V (dc + peakac).
Rear panel control.: astigmatismandtracealign.
Cathode-ray Tube and Controla (1741A)
Type: 12.7cm (5 in.) rectangularCRT, postaccelerator,-7.5 kV
acceleratingpotential,aluminizedP31phosphor.
Gratlcule: 8 x 10div (I div . 0.85cm) internal,non-parallaxgraticule,0.2 subdivisionmarkingson majorhorizontalandvertical axes,
with markingsfor transitiontime measurements.
Graticuleillumination is achievedwith Persistentecontrolsetto min.
Beem finder: returnstraceto CRT screen.
Z-axl. Input (Inten.lty modulation): sameas 1740A.
Operating mode.: write, store,display,auto-store,auto-erase,and
conventional(rear panelcontrol).
Per.l.tence: variable,-100 msto 1 min; conventional,-40 "s.
Wrltlng .peed, varleble per.l.tence and .torage: ~200 cmj"s
(235divj"s) overcenter7 x 9 div (with viewinghood).
Storage time: displaymode,at least 10 s at 22°C; store mode.at
least30 s at 22°C.
Brlghtne..: -I 70 cdj mt (50 n) increasingto - 340cdj mt (100 n)
dependingon brightnesscontrolsetting.
Era.e time: -300 ms.
Rear panel control.: astigmatism,tracealign, conventionalpushbutton,andview time.
Cathode-ray Tube end Controls (1744A)
Type: 12.7cm (S in.) rectansularCRT, postaccelerator,~IO kV
acceleratingpotential,aluminizedP31phosphor.
Gratlcule: 8 x 10div (I div
=0.72 cm) internal graticule, 0.2 subdivi-
sionmarkingson major horizontaland verticalaxes,with markings
for transitiontime measurements.
Graticuleilluminationis achieved
with Persistence
controlset to min.
Beam finder, Z-axl. Input (Intenalty modulation): See1740A.
Operating mode.: write, store,display,auto-store,and auto-erase.
Wrltlng .peed, variable per.l.tence and .torage: ~ 1800cmj"s
(2500divjlts) overcenter6 x 8 div (with viewinghood).
Storage time: storemode,at least30s;viewmode,at leastlOs; wait
time, at least60 s, al 22°C.
Per.l.tence: variable(100ms min).
Er... tim.: ~300 ms.
R..r panel control.: astigmatismand tracealign.
General
R.ar Pan.1 outputs: main and delayedgates,0.8 V to ~+2.5 V
capableof supplying-5 mA.
Amplitude Calbrator (O"Cto +18ec)
0uiP8I
lV"iIIo~l.
O.IV"iIIO~
... ..
toll
.0.1
,s
Ft..-r:
-L4~
Power: 100, 120,220,240 V ac :t 10%;48 to 440 Hz; 100 VA max.
Welght: (1740,1742) net, 13 kg (28.6Ib); shipping 15.7 kg (34.6Ib).
(1741,1743,1744) net 13.8 kg (30.5Ib); shipping 17.7 kg (39Ib).
Operating environment: tempcrature O.C to +55.C; humidity to
95% relative humidity at +40.C; altitude, to 4600 m( 15 000 ft); vibration, vibratcd in thrcc planes for 15 min. cach with 0.254 mm
(0.010 in.) excunion, 10 to 55 Hz.
51%.:(1740A) 197 H x 335 W x 597 mm 0(7.8" x 13.2" x 23.5") with
handle, 492 mm 0(19.4") witbout; (1741A) 616 mm 0 (24.3") with
handle, 552 mm 0(21.7") without; (1742A) 570 mm 0(22.4") with
handle, 502 mm 0(19.8") without; (1743A) 613 mm 0(24.1") with
handle, 549 mm 0(21.6") without; (1744A) 635 mm 0(25") with
handle; 511 mm 0 (20.1") without.
Acc...orl..
furnl.h8d: one blue light filter HP P/N 01740-02701,
one front panel cover, one 2.3 m (7.5 ft) power cord, one vinyl acces.
sory storale pouch, one Operators Guide and one Service Manual,
two Model l004IA 10:1 divider probes -2 m (6.6 ft) lang. The
1741A and 1744A also include one Model 10173A RFI filter and
contrast screen,and one Model 10140A viewing hood.
Option. end Acce..orle.
001: fixed power cord (V.S. only).
002 (1741A): Triggered A vs B Mode; phase shirt
:S2°, dc to 5 MHz; interna I triggering on channel B.
003: Auto Camera (174IA)
005 (1740A or 1741A): TV sync
034 (.xc.pt 1743A, 1744A): built-in OMM (60 Hz)
035 (.xc.pt 1743A, 1744A): built-in OMM (50 Hz)
091: two 3 m(9.8 ft) l0042A 10:1 probes in lieu of
l004IA probes
096: two 1.8 m(6 ft) 100060 10:1 probes in lieu of
l004IA probes.
101 (.xc.pt 1744A): state display (deletes A vs B
mode) single switch interface for use with 1607A Logic
State Analyzer.
112: includes I I 12A Inverter Power Supply. a portable
power source for 1700 series ~cilloscopes.
910: extra set of product manuals.
Multlm.t.r
klt: HP P/N 01742.69501 (1742A),
01741.69502 (1741A), or 01740-69503 (1740A)
adaptsstandard oscilloscopeto an Option 034/035 with
built-in LEO readout. Kit includes a multimeter, top
oscilloscopecover, vinyl storage pouch, and mounting
hardware.
Opt 101 FI.ld In.tl Klt~ t'.nnv~r.ootA
"4.n ._.:.. ---"
~.v ,'-.v.~II~U5CII.
loscopcs(exccpt 1744A)to Opt 101.Order HP P/N
01740-69501ror 1740A, 1742A, 1743A; order HP
P/N 01741.69501
ror 1741A.
Logic State Analysis
tor Option 101
Equlpment
Required
1607A: 16-Bit Logic State Analyzer including three
data probesandoneclock probe.
Four lO121A: 20 cm (8') cables. Three for X, Y, and Z
and one for pattern trigger connections.
Adapter pllte and Itrlp: (HP P/N 5061-1213)for
mountingthe oscilloscope
on top of the 1607A.
Orderlng Information
1740A 100 MHz Oscilloscope
1741A 100 MHz Storage Oscilloscope
1742A 100 MHz ~Time Oscilloscope
1743A 100 MHz ~Time Oscilloscope
1744A 100 MHz Storale Oscilloscope