Revox C115 User Manual

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4.4 Measurement of various ratings
4.4.1 Distortion with tape
The distortion of cassette recorders is measured
with a K3-filter (bandpass for 3rd harmonic). The AF gen-
erator frequency must be selected in accordance with the
existing filter (e.g. 333 Hz for a filter frequency of 1000
Hz). The measurement relates to maximum output level.
- Connect the AF generator to the AUDIO IN socket.
- Set the frequency.
- Connect the distortion meter to AUDIO OUT.
- Insert a new tape. Start the cassette deck in record
mode and measure the distortion. The maximum val-
ues can be found in the technical data (-> 5).
4.4.2 Signal-to-noise ratio with tape
- The signal to noise ratios (linear and weighted) relate
to 3% distortion.
- The measured values are specified in the.technical
data (-> 5).
4.4.3 Erase depth
For measuring the erase depth, a signal is recorded and
erased. The residual signal on the tape is measured se-
lectively (narrow-band).
- Preselect an AF generator frequency of 1 kHz
- Connect a selective voltmeter (with 1 kHz bandpass)
to OUTPUT.
- Record the signal with a level of 250 nWb/m
- Switch the generator off.
- Rewind the tape and start again in record mode.
- Measured value: better than -65 dB for type Il.
4.4.4 Crosstalk |
- Measuring signal: 1 kHz /0 dB.
- The measured value on the channel without signal
should be better than -40 dB.
C115 E 21
4.4.5 Wow and flutter
- The wow-and-flutter values given in the specifications
have been measured with a wow-and-flutter meter ac-
cording to JIS in Playback mode.

Revox C115 Specifications

General

Brand	Revox
Model	C115
Category	Tape Deck
Language	English