廠家: 英國(guó) NORTH EAST AUDIO LTD
尺寸: 44×25×15 cm
重量: 5.9Kg
主要用于錄音機(jī)及近似設(shè)備的測(cè)試。它提供了測(cè)試標(biāo)準(zhǔn)性能的手段。測(cè)試范圍：頻響、失真、偏移、靈敏度、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
