FREQUENCY COUNTER
USER MANUAL
2
2. TECHNICAL SPECIFICATIONS
CHANNEL A
Range
Coupling AC DC
FREQ A 30Hz to 120MHZ 0.01Hz to 120MHz
PRID A 8ns to 30ms 8ns to 100s
Sensitivity
(rms)
50mVrms Max. to 10kHz.
25mVrms Max. to 80MHz.
35mVrms Max. to 120MHz.
(If frequency
＜
10MHz, sensitivity figures are for 4
stable digits of reading.)
Coupling
AC or DC switchable.
Filter
Low pass, switchable in or out on channel A.
3dB point of nominally 100kHz.
Impedance
1M
Ω
nominal shunted by less than 40pF.
Attenuator
×1 or ×20 nominal.
Trigger Level
Variable b2.5V DC and –2.5V DC.
Damage Level
AC & DC ×1
DC to 2.4kHz 250V(DC+AC rms)
2.4kHz to 100kHz 600kV rms Hz FREQ
＞
100kHz 6V rms
AC & DC × 20
DC to 20kHz 500V(DC+AC peak)
20kHz to 100kHz 10MV rms Hz FREQ.
＞
100kHz 100V rms
CHANNEL B
Range
50MHz to 1.3GHz (GFC-8131H)
50MHz to 2.7GHz (GFC-8270H)
Sensitivity
GFC-8131H GFC-8270H
25mVrms Max. to 80MHz 25mVrms Max. to 80MHz
15mVrms Max. to 700MHz 15mVrms Max. to 1GHz
25mVrms Max. to 1GHz 25mVrms Max. to 2GHz
40mVrms Max. to 1.3GHz 50mVrms Max. to 2.7GHz
FREQUENCY COUNTER
USER MANUAL
3
Coupling
AC
Impedance
50
Ω
Max. Input Level
3Vrms sine wave
General
Resolution
Gate time displays at least 7 digits for 1s, 6 digits for
100ms, 5 digits for 10ms respectively.
The maximum resolution for frequency measurement is
100nHz for 1Hz, and 0.1Hz for 100MHz input
respectively, and for period measurement is 10nS for
1Hz, 0.1fs (f=10
-15
) for 100MHz input respectively.
Time Base
Frequency------------10MHz
Aging Rate-----------1ppm per month
Temperature----------5ppm, 23
℃
±
5
℃
Line Voltage---------
±
0.005ppm for
±
10% variation
Accuracy
±
Resolution
±
Time base error.
Gate Time
Continuously vary from 10ms to 10s or 1 period of the
input depending on whichever is greater.
Display
8 digits and overflow indicators
Operation
Temperature
0
℃
~40
℃
Operation
Humidity
10~80% RH
Power
Requirement
100/120/220/230
±
10%, 50/60Hz selectable internally.
Max. consumption power is 15VA.
Dimension
Approx. 230(W) × 95(H) × 280(D) m/m.
Weight
Approx. 2.0 kgs.
Accessories
Instruction manual……………× 1
Power cord……………………× 1
Test lead GTL-101 …………..× 1
GTL-110 …………..× 1
