Operating instructions

OPERATING MANUAL 2945A
46882-311D 1-9
Audio Frequency Meter
Frequency Range 20 Hz to 20 kHz
Resolution 0.1 Hz, less than 10 kHz
1 Hz, at 10 kHz and above
Indication 5 digits
Accuracy As frequency standard ± 1 digit ± resolution
Sensitivity 50 mV
Audio SINAD Meter
Frequency 1 kHz
Range 0 to 18 dB and 0 to 50 dB
Resolution 0.1 dB
Indication 3 digits and barcharts
Accuracy ± 1 dB
Sensitivity 50 mV (100 mV for 40 dB SINAD). Reading suppressed if audio
voltage is less than 5 mV
Audio Distortion Meter
Frequency 1 kHz
Range 0 to 10 %, 0 to 30 % and 0 to 100 %
Resolution 0.1 % distortion
Indication 3 digits and barcharts
Accuracy ± 5 % of reading ± 0.5 % distortion
Sensitivity 50 mV (100 mV for 1 % distortion). Reading suppressed if audio
voltage is less than 5 mV
Audio S/N Meter
Range 0 to 30 dB and 0 to 100 dB
Resolution 0.1 dB
Indication 3 digits and barchart
Accuracy ± 1 dB
Sensitivity 50 mV (100 mV for 40 dB S/N). Reading suppressed if audio
voltage is less than 5 mV
Audio Oscilloscope
Operating Modes Single or repetitive sweep
Frequency Range DC to 50 kHz, 3 Hz to 50 kHz AC coupled
Voltage Range 10 mV to 20 V per division in a 1,2,5 sequence
Voltage Accuracy ±5 % of full scale
FM Ranges ±75, 30, 15, 6, 3 and 1.5 kHz deviation full scale, ±10 % accuracy
AM Ranges 20, 10 and 5 % per division, ±10 % accuracy
Timebase 50 µs/div to 5 s/div in a 1,2,5 sequence
Graticule 10 Horizontal by 6 Vertical divisions
Special features Built in antialiasing circuitry
Audio Barcharts
Barchart Displays AF Voltage, SINAD, Distortion, S/N
Vertical Resolution 2 % of full scale
Ranging Autoranging, range hold or manual selection 1, 2, 5, sequence
with hysteresis