Fostex X-24 service manual Mixer Section, Recorder Section

Models: X-24

1 26
Download 26 pages 15.45 Kb
Page 5
Image 5

X-24

MIXER SECTION (continued)

Distortion

 

(With 400 Hz HPF & 30 kHz LPF)

0.05 % or less (Input: 1 kHz / 0 dBV signal, MIC GAIN: LINE, LINE

 

OUT: 0 dBV.)

 

0.2 % or less (Input: 1 kHz / 0 dBV signal, MIC GAIN: LINE,

 

PHONES: 3 mW / 16Ω.)

Fader Attenuation

70 dB or more at 1 kHz (from standard fader position)

Crosstalk

60 dB or more at 1 kHz (Input: MIC IN, MIC GAIN: LINE, OUT: SEND

 

OUT. Measure level at non-input channel.)

PAN Crosstalk

42 dB or more at 1 kHz (Input: MIC IN, MIC GAIN: LINE, OUT: LINE

 

OUT. Measure level at non-input channel.)

Click Noise

 

Power on / off

-20 dBVp-por less

Other switching

-30 dBVp-por less

Shock Noise

-30 dBVp-por less (Measure noise level when one side of appliance is

 

dropped 3 times from 5 cm height.)

RECORDER SECTION

Tape Speed

9.5 cm/s ± 1.5 % (3000 Hz ± 45 Hz when reproducing TCW-211 test

 

tape.)

 

 

Wow & Flutter

 

 

 

PLAY

0.25 % or less (TCW-211 test tape, ANSI WTD.)

 

REC & PLAY

0.30 % or less (AC-514 test tape, ANSI WTD.)

 

Pitch Control

 

 

 

MIN (PITCH VR: Fully CCW)

-45 % or less (TCW-211 test tape)

 

MAX (PITCH VR: Fully CW)

+12 % or more (TCW-211 test tape)

 

Fast Winding Time (FF / RWD)

150 ± 20 sec. (TAPE: C-60)

 

 

Tape Counter Deviation

0 ± 7 (FF from BOT to EOT and then RWD to BOT again.)

Standard Level

 

 

 

PLAY

-10 ± 1 dB (TCW-231 test tape)

 

 

REC & PLAY

-10 ± 1 dBV (AC-514 test tape, 1 dB or less of level difference between

 

channels is also required.)

 

 

Frequency response

 

 

 

PLAY

Test tape: SCW-977 / TCW-284F (NR: OUT)

 

 

+3 dB

 

 

 

-3 dB

 

 

 

40 Hz

400 Hz

12.5 kHz

REC & PLAY

Test tape: AC-514 (NR: OUT, recording level: 0 dB)

 

 

+3 dB

 

 

 

-3 dB

 

 

 

40 Hz

400 Hz

12.5 kHz

Test tape: AC-514 (NR: IN, recording level: -25dB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

dB

 

 

 

 

 

 

6 dB

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

250 Hz

10 kHz

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12.5 kHz

5

Page 5
Image 5
Fostex X-24 service manual Mixer Section, Recorder Section