PM6669 High precision frequency meter-[Quotation-data]--Shanghai Huabang Industrial Business-www.91way.com

Product name：

PM6669 High precision frequency meter

specification：

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Category：

instrumentation and meters -- frequency meter

Price：

factory price

Brand：

Shanghai

Place of Origin：

China

Available Quantity：

batch

delivery cycle：

Spot goods (or inquire by telephone)

Shanghai Beiyuan Industry and Trade Co.,Ltd
+86-21-66770508
+86-139101609058

91way@163.com
13901609058(Wechat)

PM6669 High precision frequency meterDetailed product description：

Detailed information on PM6669 high-precision frequency meter:

A frequency counter that completely breaks down the barrier of cost-effectiveness
PM 6669 is a very economical and easy-to-use frequency counter that fully meets your demanding requirements for high-precision measurement, reliability, and durability.
The multifunctional PM 6669 provides frequency, cycle, summation count, ratio, pulse width, and frequency offset measurement functions.
The optional components for enhancing functionality include a 1.3 GHz input, battery pack, high stability MTCXO time base oscillator, and IEEE-488 bus interface.

measurement function

Measurement Mode

Frequency A, Frequency B, Period A, RPM A, Totalize A. Frequency A/Ao, Frequency A-Ao, Pulse Width A

Frequency A or B (optional)

Range:	Frequency A: 0.1 Hz... 160 MHz
	Frequency B: 70 MHz... 1.3 GHz (Option PM 9608B)
pattern	Countdown frequency calculation
Displayed LSD:	2.5 x 10-7 x frequency/measurement time

Frequency A/Ao

Measure frequency A. The measured frequency is divided by a constant Ao before display. The resolution of the displayed ratio is determined by the measurement of frequency A. When powered on, Ao is set to 1 (default value).

Frequency A-Ao

Measure frequency A. Subtract the value of constant Ao from the measured frequency before displaying. The resolution of the displayed differential is determined by the measurement of frequency A. When powered on, Ao is set to 0 (default value).

RPM A

	Measure frequency A. Multiply the measured frequency by 60 and display the result as revolutions per second (RPM) on the screen.
Range:	6 RPM...720 x 106 RPM

Cycle A

Range:	8 ns...2 x 108s
pattern	Single cycle measurement (SINGLE) or cycle average measurement (measurement time of 0.2, 1, or 10 seconds).
Displayed LSD:	Single cycle measurement:
	(Time<100s): 100ns
	(Time>100s): 5 x cycles/109s
	Cycle average measurement: 2.5 x 10-7 x cycles/measurement time

Accumulate A

	The calculation of the event is controlled by the START/STOP button. Accumulate the number of consecutive start stop cycles. The RESET button will turn off the gate signal and reset the frequency counter to zero.
Range:	0... 1 x 1015 ， There are units indicating k or M (thousands or trillions). If it exceeds the range, the result will be discarded.
Frequency range:	Sine wave: 10 Hz... 16 MHz
	Pulse wave: 0 Hz... 16 MHz
	Pulse resolution: 80 ns
Displayed LSD:	1 count (count<109)
	5 x Count/109 (Count ³ 109)

Width A

	Measure the forward pulse width. The measurement time option is invalid (usually SINGLE measurement).
Range:	100 ns...2 x 108s
Displayed LSD:	(Time<100s): 100ns
	(Time ³ 100s): 5 x width/109s
	(Only when the duty cycle of the signal is 0.5, a trigger may occur at 50% of the amplitude)

definition

Displayed LSD

LSD =

The value of the least significant bit displayed. All calculated LSD (see measurement function section) should be rounded to the nearest decimal (e.g. 0.3 Hz rounded to 0.1 Hz, 5 Hz rounded to 10 Hz) and should not exceed 9 words.

resolution

Resolution=	The minimum increment between two measurement results on the display screen, with an error of one word.
Frequency A, B, period:	The resolution can be 1 LSD unit or 2 LSD units. If:
	If the LSD x measurement time/frequency or period is less than 10-7, the resolution is 2 LSD units (with a 30% probability)
	Otherwise, the resolution is 1 LSD unit (with a 70% probability).
Single cycle A and width A:	The resolution is equal to 1 LSD unit.

Inaccuracy

Inaccuracy,	That is to say, the relative error depends on the following factors:
	± Resolution/frequency, period or width
	± Relative triggering error
	± relative time base error

Relative triggering error

Frequency A, Period A:

± Noise Voltage A (Vpp)/Signal Slope A (V/s) x Measurement Time

Relative time base error

Deviation of ± 10 MHz/10 MHz

PM6669 high-precision frequency meter input technical specifications

Enter A

Frequency range:	10 Hz... 160 MHz (120 MHz value is 160 MHz, within a certain temperature range; Typical value is+23 º C ± 5 º C)
Sensitivity:	Sine wave:
	10 mVrms, 10 Hz to 120 MHz
	30 mV rms typical value, 120 to 160 MHz at room temperature
	Pulse: 30 mV rms, 0.1 Hz... 120 MHz
Coupling:	Communication coupling
Impedance:	1 MΩ // 30 pF
Attenuation:	Continuously adjustable within two ranges between x1 and x400
wave filter:	A switchable 50 kHz low-pass noise filter with a suppression of 20 dB at 200 kHz.
Maximum voltage:	350V (DC+AC peak) between 0 and 440 Hz, drops to 11 Vrms at 1 MHz.

trigger

Trigger level:	3 different trigger levels, adjustable duty cycle, and automatic:
	Symmetric input signal can be selected with a duty cycle of 0.25... 0.75 for the input signal.
	Positive pulse, used for input signals with a duty cycle<0.25
	Negative pulse, used for input signals with duty cycle>0.75
Automatic trigger level:	The frequency counter will undergo testing and automatically select the optimal trigger level setting. The automatic mode requires repetitive signals with a repetition rate>100 Hz. In TOTALIZE-A measurement mode, the automatic function is not available.
Trigger slope (triggered only through GPIB):	Positive or negative

RF input 1.3 GHz (option PM 9608B)

PM 6666	Enter C
PM 6669	Enter B
Frequency range:	70 MHz to 1.3 GHz
Coupling:	Communication coupling
Working input voltage range:	10 mV rms to 12 V rms, 70 MHz to 900 MHz
	15 mV rms to 12 V rms, 900 MHz to 1.1 GHz
	40 mV rms to 12 V rms, 1.1 to 1.3 GHz
Amplitude modulation tolerance	98%, the minimum signal must exceed the required minimum operating input voltage
Impedance:	50 Ω nominal value, VSWR < 2:1
Maximum voltage that will not cause damage:	12 V rms, Provide overload protection through PIN diode

External reference input D

	When an appropriate external reference signal is connected, the input is automatically monitored. The display screen will show that an external reference signal has been used.
Input frequency:	10 MHz ± 0.1 MHz
Coupling:	Communication coupling
Sensitivity:	500 mV rms
Input impedance:	Approximately 300 Ω at 10 MHz
Maximum input voltage:	15 V rms

PM6669 High precision frequency meter（schematic diagram）