Audio Alignments; Peak Meter; Frequency Response With - Revox C115 Operating And Service Instructions

E 18 C11 REVOXx®
4.3 Audio alignments
All adjustment controls for this work are located on the
audio board.
4.3.1 Peak meter
sockets L, R.
- Set the OUTPUT LEVEL switch to the 0 dBu position.
- Press the REC key to switch to SOURCE (Rec/
4 Pause).
- From the generator feed a 1 kHz sine-wave signal so
that a level of 775mV appears on the output.
- With the trimmer RX 01 (left) and RX 02 (right) adjust
1 ~ toOdB.
4 - Lower the input level by 35 dB and adjust the trimmer
RX 31 in such a way that only the first segment lights
up on the peak meter.
4.3.2 Frequency response with tape, MPX filter
- Frequency response check (level 0 dB display, freq.
30 Hz - 18 KHz +/-1 dB)
- Feed 19 kHz 0 level 0 dB display to the INPUT
sockets.
- Switch the recorder to REC/Pause by pressing the
REC key.
- Switch on the MPX filter.
- Adjust the coils L 651 and L 652 to minimum level.
The level should be attenuated by at least 30 dB.