I've adjusted the playback electronics on my MX5050 so that when
playing back a 1k tone off the test tape, I get 1.228 v at the output
and show 0 on the VU meter. When I got to adjusting the record level,
the Otari manual had the following to say:


3-6-(4) RECORD LEVEL ADJUSTMENT

This adjustment should be made at 15 ips for high speed models and 7
1/2 ips for low speed models.

12. Set audio oscillator freqeuncy to 1kHz and output level -15dBm.
13. Set INPUT LINE control to full clockwise position. Set SRL switch
to SRL. Set MONITOR switch to TAPE.
14. Start record mode. Adjust REC LEVEL potentiometer for 0 VU on VU
meter.

3-6-(5) RECORD LEVEL CALIBRATION

This calibration should be made after the record level adjustment
continuously.

15. Set MONITOR switch to SOURCE position.
16. Calibrate Rec. CAL. potentiometer so that VU meter inicates 0 VU.



What's confusing me (aside from the "adjustment continuosly") is the
instruction to set the oscillator level for -15dBm. Given the rest of
the instruction, shouldn't it be set to 1.228 v (+4dBu?) so that 1.228
v in gives you 1.228 v out off the play head? Isn't that 19dB below
what I'd want to use? What am I missing?