Pro Audio Signal Distortion Device Test Equipment Analyzer Tester Meter TDM-1911

Description

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Pro Audio Signal Distortion Device Test Equipment Analyzer Tester Meter TDM-1911
Description:
TMD-1911 series automatic distortion tester to measure 400Hz or 1000Hz signal is small to 0.01% of distortion, while 20Hz AC signal relative to the level of 100KHz was measured as a measure of distortion, can be performed, such as radios, modulation check tape recorders and other audio products, the level of distortion and simultaneously two meter display, the distortion measure fundamental frequency suppression circuit having a wide range of the filter, measurements.
Feature:
1. Level and distortion together display with two ports accurately.
2. Lightweight, easy operation.
3. With wide range filter, can test accurately even impurities in signal.
Specification:
Model Name: TDM-1911 Distortion Meter
Voltage: 220V/110V±10%  50/60Hz
Distortion measurement:
1. The input level: 10 m V to 100 VRMS
2. The measurement frequency :400 Hz and 1 KHZ frequency of two points
3. The measuring range :0.1 to 30% of six kinds of full scale
4. The harmonic accuracy :+ / - 0.5 dB (f0 2 to 10 kz)
5. The residual distortion : greater than or equal to 70 db (distortion than less than or equal to 10 db, input level greater than or equal to 30 mv)
6. The fundamental frequency suppression is greater than or equal to 60 db (f0 + / - 5%)
7. Full scale accuracy :+ / - 3% (20 db)
8. Automatic frequency selection :can measure the rotation frequency of the nominal distortion degree of plus or minus 5%
Level measurement:
1. The measuring range: 100 mv, a total of seven to 100 v range
2. The frequency response (1 KHZ)
+ / - 0.5 dB or less (from 20 hz to 50 KHZ)
1 mm or less db (from 20 hz to 100 KHZ)
3.Accuracy: + / - 3% or less full scale (1 KHZ)
4. Input impedance: 100 k Ω
5. The AC output voltage: about 1 VRMS (the level range)
6. Enter 100 largest VRMS (DC + AC)
7. The power supply requirements: 110 v / 220 v, 50/60 hz, 12 va
8. The contour size: 283 (L) * 155 (H) * 264 (D) mm3
9. Weight: about 5 kg
10. Attachment
User manual *1
0.2 A tube*2
The power line*1
BNC cable * 1
The matters needing attention before use：
1. The maximum allowable at the input AC input voltage of 200 v.Beyond this range attenuation board may be damaged.
2. The use of
TDM - 191 distortion meter in 5-350 - c temperature range, avoid using instruments in this temperature range.
3. Before use distortion meter for measuring, please make sure that the distortion meter pointer is set on the dial "0".If the pointer is not zero, but by adjusting the knob of the front panel
Summary：
TDM - 1911 can be used to measure the distortion degree of audio products and the level parameters.Measured 400 hz & 1 KHZ frequency of two point signal distortion degree of 0.1% to 30% six kinds of full scale.Through three light input level under calibration Settings can know distortion measurement working condition.
With a wide range of filter can be measured, including shake sway and flutter signal distortion measurement.Can automatically distinguish between 400 hz and 1 KHZ frequency point and two, respectively, with green and yellow light instructions, said red indicator measuring the frequency of the signal does not fall within the scope of measurement.
In the distortion degree of the input signal level measurement, the distortion measurement can eliminate the need to adjust the level meter deviation.
When measuring the simply select correct range on the front panel, and then press the button, automatically measuring instrument.
Panel display:
Level meter: in "Volt" and "dBm" shows that the reading of the input signal level
2. Filter: yellow indicator according to input signal frequency is 400 hz, green light input signal frequency of 1 KHZ, said red lights input signal frequency measurement range
3. The distortion degree of tables: in "%" and "dB" display input signal distortion degree of the readings
4. Level: set the knob before measuring adjustment knob to zero level pointer
5. Distortion setting knob: before measuring distortion degree adjustment knob that pointer to zero
6. Level range knob: through correctly in the seven key choice range of level measurement range
7. Input terminals: measuring signal input terminal
8. Distortion range knob: through six key choice range of distortion degree of the correct measuring range
9. The power switch
The fuse holder: insert the appropriate insurance tube to avoid choosing a wrong input voltage burning equipment
11. Ac socket
12. The range of terminal: monitor output terminal.When the input frequency is 400 hz or 1 KHZ, basic frequency are filtered out, the frequency of the signal in other to enter the terminal.Output level affect the level meter (1) of the readings.When the distortion degree level meter with tables are full scale, can produce the output level of about 1 VRMS.Distortion degree if the table is full scale range and level meter is lower than the full scale range, output level is less than 1 v.
13. The voltage selector: mainly supply operation to choose the appropriate input voltage.
Distortion measurement:
1, ensure that the input signal level in the range of the instrument allowed range
Two or three filter light distortion measurement condition.Yellow lights said measuring frequency is 400 hz, green lights said measuring the frequency of 1 KHZ, red lights the measured signal frequency unpredictable.
3, this instrument is automatic measurement only input frequency is 400 hz distortion degree of plus or minus 5% or 1 KHZ plus or minus 5%.If the input signal is not accurate 400 hz or 1 KHZ, for example in 400 hz or 1 KHZ range of plus or minus 5%, its fundamental frequency rejection ratio will be between 0.05% and 0.03% (66 db and 70 db) can be observed through the figure 3 base frequency suppression ratio curve.So the frequency of the input signal is the closer it gets to the fixed frequency filter, get the more accurate readings.
4, this automatic distortion meter don't need to do any choice can be automatically measured 400 hz or distortion degree of 1 KHZ.
5, and start measuring
(before the measurement, please make sure that the pointer to the header (1) and (3) to zero, or set up (4) and (5) adjust pointer to zero) will instrument electricity, to ensure that the voltage selector in the right gear (110 v or 220 v, press the power switch pet-name ruby, "No Go" aligned with the said instrument is available.
Press the 6 key as input signals to choose the appropriate range.30% at the end press keys, through all landowners to distortion meter input signal.
If the input signal is 400 hz, the yellow indicator, if the input signal is 1 KHZ, the green light is lit.
Red indicator according to the input signal is too high or too low, range outside the scope of the level meter.Outside the outer filter or frequency.As shown in figure 5 level Pointers, to measure the distortion degree.
When the yellow or green light, measurement results through the header (3) can be read.Of course, choosing the appropriate range measurement can get more accurate results.
Fifth, level measurement:
1. Choose an appropriate input level range
2. Input signal at 7, if the input signal frequency range within 10 hz - 100 KHZ, header (1) to measure the level of value is displayed "VOLTS or dB"
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