User Manual

The instrument is a multi-function and equal
accuracy counter.
Features
Eight digits, bright seven-segment LED
display, four function performance, low power
dissipation circuit design, small size, light weight,
high stability crystal oscillators ensure accuracy of
measurement and full input signals conditioning.
Four functions
Frequency, period, totaling and self-checking.
All functions are accomplished by a monolithic
large-scale micro-processor. The input signals can
be conditioned by attenuation. The position of
switches, indicators, wiring terminals and all
specifications are provided in this booklet. Before
operate this unit, please refer to this instruction
manual thoroughly for better use.
1. Methods of Measurement
Frequency Measurement
CHANNEL 1
Range: 10Hz ~10MHz direct counter
10MHz ~100MHz scale by proportion
Resolution: direct counter: 10Hz, 100Hz
scale by proportion: 10Hz, 100Hz, 1000Hz
Sampling time: 0.01s, 0.1s, 1s
Accuracy: Timebase error Trigger error
Measured frequency LED
LED ＝100ns/ Sampling time Measured
frequency (or Measured period)
CHANNEL 2
Measurement range
F1000C Model:
100MHz ~1000MHz scale by proportion
F2700C Model:
100MHz ~2700MHz scale by proportion
Resolution
Scale by proportion: 100Hz、1KHz、10KHz
Sampling time: 0.01s, 0.1s, 1s
Accuracy: Timebase error Trigger error
Measured frequency LED
■
●
●
●
● ± ±
× ±
×
● ：
● ：
± ±
× ±
Period Measurement
Input: Channel 1 Range: 10Hz ~10MHz
Resolution: 10 S, 10 S, 10 S
Accuracy: ±Timebase error±Trigger error
×Measured frequency±LED
Totaling Measurement
Input: Channel 1 Range: 10Hz ~10MHz
Resolution: 1 count pulse
Self-Checking
Display: 8 bits LED, 0-9 repeatedly display
Input Characteristic
CHANNEL 1
Input Sensibility:
10MHz range: 10Hz ~8MHz 70mVrms
8MHz ~10MHz 30mVrms
100MHz range: 10MHz ~80MHz 30mVrms
80MHz ~100MHz 30mVrms
Attenuation: ×1, 1/20
Filtering: Lowpass, 100KHz，-3dB
Impedance: approx. 1MΩ (less than 35pF)
Maximum Safety Voltage: 250V (DC+ACrms)
(set ATT on 1/20)
CHANNEL 2
Input Sensibility:
F1000C: 30mVrms
F2700C: 100MHz ~2400MHz 30mVrms
2400MHz ~2700MHz 75mVrms
Impedance: approx. 50Ω
Maximum Safety Voltage: 3V
Timebase
Timebase Frequency: 13MHz
Short-term Stability: ±3×10 /S
Long-term Stability: ±2×10 /month
Temperature Coefficient: ±1×10 , 0℃ ~ 40℃
Line Voltage: every ±10％ vary based on every
±1×10 vary of timebase frequency
4. General Conditions
Display: 8 digits, 0.39 inch red bright LED
display with decimal point, sampling, overflow,
KHz, MHz, s indication.
Power Requirement: AC 240±10% 50Hz
Starting Time: 20 minutes when temperature
■
■
■
2.
●
●
●
●
●
●
●
●
3.
●
●
●
●
●
●
μ
●
●
-7 -8 -9
-7
-5
-9
-5
below 25
Temperature: Operating: -5 ~ +50
Storage and Transportation: - 40 ~ +60
Humidity: Operating: 10 ~ 90%RH
Storage: 5 ~ 95%RH
℃
● ℃ ℃
℃ ℃
●
Power Requirement:
AC 240±10%, 50Hz Single-phase, Maximum
Power Consumption is 10W.
It required to be pre-heated 20 minutes in
advance before operation so as to ensure
frequency stability of the crystal oscillator.
2 Features of Front Panel:
1. Before Operation
●
●
.
1) POWER Press down to switch on,
F1000C displays "1000-L" in two seconds
F2700C displays "2000-L" in two seconds
2) HOLD Press down to pause measuring and
holding the current data.
3) REST Press down to immediately reset the
counter and start a new period of measurement.
4) GATE TIME Select different resolutions
and counting periods when measuring frequency
and period.
5) CHECK Check the unit status, as well as 8
bits display 0-9 repeatedly and simultaneously when
press it.
6) 1.TOT Total measurement.(Channel 1 available)
7) 1.PERI Period measurement.(Channel 1 available)
8) CH1 10MHz 10Hz ~10MHz range
selectable. (Channel 1 input)
9) CH1 100MHz 10MHz ~100MHz range
selectable. (Channel 1 input)
10) CH2 F1000C 1GHz: 100 MHz ~1GHz
range selectable. (Channel 2 input)
F2700C 2.7GHz: 100 MHz ~2.7GHz range
selectable. (Channel 2 input)
11) 1.ATT Switch of input signal attenuator.
Input sensibility is attenuated by 20 times when
press down. (only Channel 1)
12) LPF Low Pass Filter, AC100KHz, -3dB.
13) CHANNEL1 Input of Channel 1. Press
"1.ATT" to lower the input signal when the input
signal exceed 300mV, can improve accuracy of
measured value.
14) CHANNEL2 Input of Channel 2
15) s unit of period.
16) Mhz unit of frequency.
17) KHz unit of frequency.
18) Display
19) GT Sampling status, indicator lights means
sampling.
20) OF Overflow, indicator lights means exceed
8 digits.
Note: All the function keys are released:
F1000C displays "1000-L",
F2700C displays "2700-L"
μ
INTRODUCTION
SPECIFICATIONS
OPERATION