Optoelectronics M1 Owner's Manual page 4

CONTROLS
PWR ON/OFF Thisslide switch turns on
power
to the Model
Ml
HandiCounter". The MocIcl Ml can operateeither froman internalNiCad
battery
pack, or from the model A~
walladapter/charger.
When operating from the
A(W adapter/chargcr, the battery pack
will be automaticallycharged when the
power
switch is in either the ONor OFFposition.Tuming on the
power
to the
Mode l Ml initiatesa 1.05C' C 011d testof all LCDsegments.
AMP 1 M OHM/SO OHM Thisswitchselects either the 1 MegOhm high imped-
anceamplifiers,or the.50Ohmamplifiersand prescalers. Whenthis switchis in the
50OHM
position.
the two RANGE switcheslabeled200MHzand 8lJMHz/3GHz
become active. and the INPlIT AlB and FUNCTION push buttonsare disabled.
When the switch is in the I MOHMposition , the INPUT
AlB
and FUNCTION'
push buttonsare enabled.and the RANGE switchesare disabled.
RANGE200 MHz Whm the.50
Ohm amplifiers are
seected, the RANGE
switch
is ective.
When in the nlMHz position. frequencies beween lOMHzand
250MHz can be counted. This
is the
direct rount
(not
prescaed) 50Ohm range.
RANGE2.4GHz When the RANCE200MHzswitchis in
the
24GHz
position,a divide by 64
prescaler
Idivides
the
input frequencyby a factorof 64
prior tocounting)extendsthe rangeof the counter to
over 2.4GHz. The counting
time and resolutionis adjustedas shown in the specifications.
ARM/ S TORE When
eithcr
theCAP1UREor RECALL mode is
selected,this push button is active .
GATE
The
GAIE
push
button selectseitherthe
gate
timeor
the numberof averages.dependingon the functioncurrentlyselected ,
The GAIE
push button
is
disabled whenthe RECALL mode
is seected ,
DIGITALAUTO CAI'fURE'"
Filter Mode Turnon the ALTER switchto reducerandomcounting,
noise, and falsesignals.A
unique
digitalfilteringalgorithmpermits
only
meaning-
fu]
measurements
to
be displayed.Thismakesusing the MOOel Ml mucheasier
and makes
frequency findingmuch more
powerful,
becausedistant or short
duration frequenciescan be pickedout of the backgroun d clutter. In the FILTER
mode,the GATELEDblinks each timea measurementpassesthe filter.To make
the filtereven more effective at eliminatingfalsecounting,a higher level of filtering
can be selectedat
power
up by holdingdown the GAIE
push
button until the
depteytestappears In this mode,the digital filter algorithm
IS
more
selective.
L
;: wrnng
the Model Ml
00
without holdmgdown the GAIE push button selects the
normal filter algonthm
•
Capture Mode
When
the RLTERswitch and CAPTURE switchare
both turned on. the ModelMl is in
the
powerfulDIGITAL AlITOCAJTIURE
mode.
In
this mode, the ARM/STOREpush button switch is
active .
Whenthe
ARM/STOREpush button is depressed.the next measurement
to
pass the filter
will be displayedand stored in menory. While armed, the FREQUENCY annuncia-
tor flashes.Whena measurement passesthe filter,the FREQUENCY annunciato r
stops flashing,and the
GATE LED
blinks once. Eachtime the
ARM/STORE
push
button is depressed, the nextmeasurement
to
pass the filter
is
displayedand stored
in
memory .
Threeinternal
memory
registers(Register
X.
RegisterA, and Register
B)
allow the
most
recent three measurementswhich
pass
the filter to be
remem-
bered and recalled .
Rtall Mode RECALL mode is selected by turning off the RLTER
s",,-itch and leavingthe CAPlURE switch
00 .
In this mode,
the
frequencies
stored
in
the three
memory registers
can be displayed.
Whenneitherthe A nor B display
annunciator is on. Register
X
is beingdisplayed. Depressingthe ARM /STORE
push button displays RegisterA. Depressingthe ARM/STORE push buttona
secondtime displaysRegister B. Depressing the ARM/STORE push button a third
time displays Register
X
again,and so on. Register
X
containsthe most: recent
measurement;RegisterA contains the secondmost recent measurement;and
RegisterBcontains the third most recentmeasuremen
t. No measurementscan be
made when the RECA LLmode is active.
BACKUGHTINSTRUCTIONS
Ibclclight ON
Youmust hold the ARM /STOREbuttonas youtum powe-on
the Model Ml. Thismustbe done each time the ModelMl is turned off
or loses
power.
""'kUgh! OFF The backlight
is
turned off by turning off
the
po_
of the Model
Ml
ABO
AutonulticBacklight OFF
The Model Ml featuresan Automatic Backlight OF F featurethat allowsfor extended
battery life while the Backlight is on. Thisfeature willtum offthe backligh t ten (10)
secon ds after the lastfunctionchange has been made. Thebacklightwillonlycome
on with a functionchange.
Standard Mode Filterand D pture featurt.art turned off.
The ModelMl featuresan Automatic Backlight OFF
featurethat allows for extended
battery life whiletbe Backlight is on Thisfeature will tum off the backlightten (l0)
SBDndS
after the
last function change
has
been made. The backlight will only
rome
on with a function change.