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參數(shù)資料
| 型號： | PFM1300 |
| 英文描述： | FREQUENZMESSER PFM1300 HANDBETRIEB |
| 中文描述： | FREQUENZMESSER PFM1300 HANDBETRIEB |
| 文件頁數(shù)： | 1/1頁 |
| 文件大小： | 72K |
| 代理商： | PFM1300 |
THURLBY THANDAR INSTRUMENTS
PFM1300
1.3GHz hand-held frequency counter
A hand-held counter with bench top performance
The PFM1300 is a highly compact battery powered frequency counter
which offers the convenience of a hand-held multimeter.
Surprisingly, however, its performance exceeds that of many bench top
counters of much higher cost.
A large and clear display
Despite its compact dimensions, the PFM1300 incorporates an 8 digit liq-
uid crystal display of the size you'd expect to find on a bench top instru-
ment.
A full range of annunciators provide indication of measurement function,
measurement time, overflow, trigger activity, low battery, and the mea-
surement units.
Operation is simplicity itself with all functions and ranges being selected
using just five large buttons.
Wide frequency range and high sensitivity
The PFM1300 can measure frequencies in the range 5Hz to 1300MHz.
Unlike many counters, the sensitivity is high across the whole frequency
range with no dead spots.
Alowpassfiltercanbeselectedtoreducehighfrequencysignalnoiseand
ensure stable readings at lower frequencies.
Low power consumption and push-to-measure
Despite its wide frequency range the PFM1300 has a remarkably low
powerconsumptionenablingittooperateformanyhoursfromaPP3size
battery.
A push-to-measure capability gives a virtually instantaneous reading fol-
lowed by an automatic power down after 15 seconds.
Thisprovidesgreatlyextendedbatterylifewherecontinuousmonitoringof
the signal is not required.
Alternatively it can be operated from AC line via a DC adaptor.
Reciprocal counting for improved resolution
The PFM1300 uses a reciprocal frequency counting technique which in-
volvesmultipleperiodmeasurementsfollowedbycomputationoftherecipro-
cal.
The system yields at least 7 digits of resolution per second of measure-
menttimeandcanmeasurelowfrequenciestoaresolutionof0.0001mHz.
Frequency and period measurement
The PFM1300 can display signals in terms of period as an alternative to
frequency up to 25MHz.
Hold function
AHoldbuttonallowsreadingstobefrozenonthedisplayformeasuringnon
continuous signals or recording results later.
Note:
This is a faxable data sheet, a colour brochure is also available.
MEASUREMENT FUNCTIONS
Frequency (Range A)
Frequency Range:
Resolution:
Accuracy:
Frequency (Range B)
Frequency Range:
Resolution:
Accuracy:
Period
Frequency Range:
Resolution:
Accuracy:
Note:
The resolution depends upon the measurement time and the input fre-
quency. At least 7 digits are displayed per second of measurement time.
Measurement time is selectable to be 0.1, 1, or 10 seconds.
OPERATING FUNCTIONS
Press to measure
With the power switch off, pressing any of the function select keys will power
the instrument up in the corresponding function. The instrument will automati-
cally switch off 15 seconds after the key is released.
Hold
Pressing the Hold key will stop further measurements being made and the
current measured value will remain in the display, with the Hold indicator on,
until the Hold key is pressed again.
INPUT SPECIFICATIONS
Input A
Input Impedance:
1M
//25pF
Frequency Range:
5Hz to 25MHz
Sensitivity:
Sinewave 15mVrms 10Hz-20MHz
Input B
Input Impedance:
50
nominal
Frequency Range:
20MHz - 1.3GHz
Sensitivity:
10mVrms 20MHz - 700MHz, 50mVrms to 1.3GHz
Signal activity indicator
When an adequate input signal is present the Trig indicator will show, indicat-
ing that a measurement is possible.
Noise filter
For Input A, a low pass filter with a cut-off frequency of 50kHz is user
selectable to ensure stable readings at low frequencies.
DISPLAY
8 digits (11.5mm high) and 11 annunciators
TIMEBASE
Initial Error:
±
2ppm (10MHz crystal)
Temperature
Coefficient:
±
10ppm for -20
Ageing Rate:
<
±
5ppm/year
POWER REQUIREMENTS
Battery Type:
9V PP3 alkaline
Battery Life:
Typically 12 hours continuous or 3000 press-to
-measure operations. Low battery indicator
PHYSICAL & ENVIRONMENTAL
Safety:
Designed and manufactured to IEC1010-1
Operating Range:
+5
Storage Range:
-20
Size:
81x178x30mm (W x L x D)
Weight:
190g excluding battery
5Hz to 25MHz
10-7Hz to 10Hz (see Note)
±
(1 digit + timebase error)
20MHz to 1.3GHz
1Hz to 1kHz (see Note)
±
(1 digit + timebase error)
5Hz to 25MHz
10-7ns to 1us (see Note)
±
(1 digit + timebase error)
Typically <
±
0.3ppm/
o
C for 18oC to 28oC and
o
C to 70
o
C
o
C to +40
o
C to +60
o
C, 20% to 80% RH
o
C
Thurlby Thandar Instruments Ltd. operates a policy of continuous development
and reserves the right to alter specifications without prior notice.
Designed and built in the EEC by:
Thurlby Thandar Instruments Ltd
.
Glebe Road, Huntingdon. Cambs. PE18 7DX England
Tel: +44 (0)1480 412451
Fax: +44 (0)1480 450409
e-mail: sales@ttinst.co.uk Web: http://www.ttinst.co.uk
PFM1300
T
THURLBY THANDAR INSTRUMENTS
i
T
G
5Hz to 1300MHz frequency range
G
Very high sensitivity at all frequencies
G
Frequency and period measurement, 0.0001mHz resolution
G
Reciprocal counting technique gives superior accuracy
G
Push-to-measure function with auto power-down
G
Large 8 digit display with full range of annunciators
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