录音机电磁特性测试仪(FERROGRAPH RECORDER TEST SET) RTS2

厂家: 英国 NORTH EAST AUDIO LTD
尺寸: 44×25×15 cm
重量: 5.9Kg

主要用于录音机及近似设备的测试。它提供了测试标准性能的手段。测试范围:频响、失真、偏移、灵敏度、信噪比、抖晃、增益。

VARIABLE FREQUENCY TEST SIGNAL GENERATOR

Frequency range:15Hz to 150KHz in four ranges

Frequency response

Flat within±0.2dB over the range 15Hz to 150KHz

Distortion

less than 0.025% at 1KHz

less than 0.08% over the range 100Hz to 20KHz

Maximum output level

3V(approx.)into open circuit

not less than +8dBm into 600ohm load

output attenuator

coarse:six steps of 10dB

fine:continuous over range of 15dB approx.

external:fixed 40dB

output impedance

independent of frequency

dependent on setting of output attenuator coarse control:always less than 450 ohms.From eternal 40dB attenuator 47 ohms.

FIXED FREQUENCY TEST SIGNAL GENERATOR(FOR DRIFT AND WOW & FLUTTER MEASUREMENTS)

Frequency

3.15KHz(RTS2A models,3KHz)

Output level

350mv approx.

Output impedance:220 ohms approx.

MILLIVOLTMETER

Frequency response

flat within ±0.2dB over range 10Hz to 150KHz

Accuracy

Within±2% f.s.d. over range 30Hz to 20KHz

Sensitivity

1mv to 100v f.s.d. in 11 steps of 10dB

input impedance

2Megohms(approx.)

Note:No D.C.path between the input leads

indication

average reading meter scaled in r.m.s values for sinusoidal signals

with the addition of a RTS Auxiliary unit up to +20dB into 600 ohm load

WOW AND FLUTTER METER

Type of measurement

meter measures peak wow and flutter weighted to D.I.N 45507

input signal required

3.15KHz(RTS2A models 3KHz)at level not less than 75mv

normally this is supplied by the fixed frequency test signal generator of the test set itself

if the test signal is from another source,e.g.a pre-recorded test disc or tape,then the frequency fo the test signal should be within ±5% fo the nominal value

sensitivity

three ranges for wow and flutter measurements:0.1%,0.3% and 1% f.s.d.

one range,direct reading for drift measurements:±2% f.s.d.

input impedance

50000 ohms,approx.

frequency response for wow and flutter measurements

maximum at 4.0Hz:6dB points at 0.8Hz and 20Hz

Alternative output

The signal measured by the meter also appears on a BNC socker on the front panel and can be fed to  an external oscilloscope,wave analyser,filters,etc.

The output levle is 3V(approx.)for meter f.s.d. from a source impedance fo 15000ohms

DISTORTION METER

Type of measurement

rejuction of fundamental by a tuned filter

input signal required

frequency within the range 400 to 1100Hz(approx.)Signal normally supplied by the variable frequency test signal generator

The level of the signal from the equipment under test should be 100mV or more.Smaller inputs may be used but with an increased minimum distortion reading

second harmonic rejuction:less than 0.25dB

minimum reading (from a distortionless source)

less than 0.05%

bandwidth fo harmonic distortion measurment:15Hz to 20KHz

There is an optional L.F. cut(turnover 400Hz)for the rejection of hum and other L.F.noise components.

input impedance:100000 ohms approx.

Alternative output

The signal measured by the meter also appears on a BNC socker on the front panel and can be fed to an external oscilloscope,wave analyser,filters,etc.

The output level is 1V(approx.)for meter f.s.d. from a source impedance of approximately 500ohms


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