B&K Precision 1803D User Manual [en, es]

MANUAL

200 MHz FREQUENCY

Model 1803D

MANUAL DE INSTRUCCIONES

Modelo 1803D

COUNTER

200 MHz CONTADOR DE

FRECUENCIA

TEST INSTRUMENT SAFETY

WARNING

Normal use of test equipment exposes you to a certain amount of danger from electrical shock because testing must sometimes be
performed where exposed high voltage is present. An electrical shock causing 10 milliamps of current to pass through the heart will stop
most human heartbeats. Voltage as low as 35 volts dc or ac rms should be considered dangerous and hazardous since it can produce a
lethal current under certain conditions. Higher voltages are even more dangerous. Your normal work habits should include all accepted

practices to prevent contact with exposed high voltage, and to steer current away from your heart in case of accidental contact with a high
voltage. Observe the following safety precautions:

1. There is little danger of electrical shock from the dc output of this power supply because it can source 60 Vdc. There are several
other possible test conditions using this power supply that can create a high voltage shock hazard:

a. If the equipment under test is the “hot chassis” type, a serious shock hazard exists unless the equipment is unplugged (just turning

off the equipment does not remove the hazard), or an isolation transformer is used.

b. If the equipment under test is “powered up” (and that equipment uses high voltage in any of its circuits), the power supply outputs

may be floated to the potential at the point of connection. Remember that high voltage may appear at unexpected points in
defective equipment. Do not float the power supply output to more than 100 volts peak with respect to chassis or earth ground.

c. If the equipment under test is “off” (and that equipment uses high voltage in any of its circuits under normal operation), discharge

high-voltage capacitors before making connections or tests. Some circuits retain high voltage long after the equipment is turned
off.

2. Use only a polarized 3-wire ac outlet. This assures that the power supply chassis, case, and ground terminal are connected to a good
earth ground and reduces danger from electrical shock.

3. Don’t expose high voltage needlessly. Remove housings and covers only when necessary. Turn off equipment while making test
connections in high-voltage circuits. Discharge high-voltage capacitors after removing power.

(continued on inside back cover)

TABLE OF CONTENTS

page

TEST INSTRUMENT SAFETY ----------inside front cover

SPECIFICATIONS ..............................................................4

CONTROLS AND INDICATORS -------------------------- 6

OPERATING INSTRUCTIONS .......................................8

page

INSTRUMENT REPAIR SERVICE.........................10

LIMITED ONE-YEAR WARRANTY...................... 11

SPANISH MANUAL ............................................. 16

SPECIFICATIONS

MODES/FEATURES

Gate Times 1.0 sec and 0.1 sec gates.
Displayz 7 digits

FREQUENCY CHARACTERISTICS

Range: HF 10Hz to 25MHz

VHF 10MHz TO 200MHz

Accuracy:

1.0 Sec Gate ± Time base accuracy, ± 1
count

0.1 Sec Gate ± Time base accuracy, ± 2
counts

Resolution:

1.0 Sec Gate 1Hz

0.1 Sec Gate 10Hz

INPUT CHARACTERISTICS

IMPEDANCE HF 1MΩ

VHF 50Ω

Connector BNC
Coupling D6
Sinewave Sensitivity 50mVrms, 10Hz to

200MHz

Maximum Input 3V

TIME BASE CHARACTERISTICS

Type Crystal Oscillator
Frequency 5.24288MHz
Stability ±10ppm
Temperature Stability <0.001%(10ppm),0-

500 C

Maximum Aging Rate ±l0ppm/year

4

SPECIFICATIONS

DISPLAY CHARACTERISTICS

Display: ............................. 0.43"LEDs

Overflow Indicator: ............ OVERflow indicator (top left corner of display) lights when count exceeds 199.9999 counts.

Display Update Time:......... . 1.0 Sec Gate: 2.0 seconds. 0.1 Sec Gate: 0.2 seconds

GENE RAL

Power:

AC Adaptor ------------------------------7-10V with 500mA

Temperature Range & Humidity:

Operation ------------------------------ -. 0 to +50'C , 85%R.H.
Storage --------------------------------- -- -15'C to + 70

Dimensions (HxWxD) ------------------ -- 2.1" X 9.06" X 6.18"(54 X 230 X 157mm)
Weight ------------------------------------- -- 0.8Kgs (1.761 (lbs)

Accessories Supplied -------------------- -- Instruction Manual BNC to Clip cable

NOTE: Specifications and information are subject to change without notice. Please visit www.bkprecision.com for the most current product
information.

’C, <

-75%R.H.

5

CONTROLS & INDICATORS

1. Input Jack. Input jack for 10Hz to 200MHz frequency measurements.

2. Display. Seven digit display used for all frequency readings.

3. OVERfIow Indicator. Lights whenever range of display is exceeded (199.99999MHz). Most significant digit is not displayed.

4. Frequency Function Switch.: Selects VHF and HF frequency range at input jack.

5. Gate Time Switch.: Selects gate time 0.1 second and 1.0 second.

6. POWER Switch: Turns power ON and OFF.

CONTROLSAND INDICATORS

OPERATING INSTRUCTIONS

WARNING

Some operating conditions may pose an electrical shock
hazard. Know and observe the precautions described in the

"Test Instrument Safety” section.

2. Connect the AC Adapter to an ac outlet and plug into the
rear panel jack of the frequency counter.

3. Set the POWER/GATE TIME switch to 0.IS or 1.0 S.

a. Use 0.1S for faster measurement of high frequency

signals. The update time of the display is every 0.2
second. Resolution is 10Hz.

b. Use I.OS for measurement of low frequencies or

where highest resolution is needed. The update
time of the display is every 2 seconds. Resolution
is 1Hz.

4. Apply the 10Hz to 200MHz signals to be measured to
the input jack.

CAUTION

To prevent damage to the unit, do not apply input voltage higher that the
limits listed in the "Specifications” section. Connect the instrument ground
lead only to zero volt points in the circuit under test. Attempting to "float” the

unit may result in a shock hazard, since the instrument ground is exposed at
the front panel BNC connector.

If measuring ac line frequency, observe the precautions listed in the "Line
Voltage Measurement" paragraph.

1. .Frequency is given by the front panel display. The decimal point is
automatically positioned.

a. With a 1.0S gate time, readings below 1MHz are given in decimal

MHz, above MHz, they are in whole megahertz. For example,
12KHz is displayed as.012000, and 12MHz is 12.000000.

b. With a 0.1S gate time, all readings are displayed in MHz, and with

one less digit resolution. For example, 12KHz is displayed as

0.01200, and 12MHzis 12.000000.

5. Measurement interval, or "gate time", is 1.0 second or 0. I second. This is
combined with an additional interval of equal time for internal latching
and resetting, for a total of 2 seconds between display updated when 1.0S

gate time is selected or 0.2 seconds when 0.1S gate time is selected.

6. The OVER flow indicator lights whenever the range of the display
(199.9999MHz) is exceeded.

8