Rane RC 24T Handleiding
Rane
Mengpaneel
RC 24T
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OPERATING / SERVICE MANUAL RC 24T
PAQRAT RECORDING CONVERTER
SETUP & OPERATION
1. Connect the supplied TDIF Cable between the DB-25 TDIF-1 connector on your DA-88 and RC-24T.
2. Connect the supplied BNC Cable between the RC-24T WORD SYNC OUT connector and the WORD SYNC IN connector
on the DA-88.
3. Connect a stereo digital audio source signal (up to 24-bit) to the AES/EBU (or SPDIF) INPUT on the rear of the RC-24T.
Set the AES/EBU or SPDIF SELECT SWITCH to the appropriate position to select the proper input.
4. Connect the AES/EBU OUTPUT on the rear of the RC-24T to whatever is receiving the 24-bit digital audio signal during
playback (and monitoring).
5. Connect the supplied Rane RS-1 remote power supply to the red POWER jack on the rear of RC-24T.
6. Make sure the DA-88 is plugged in and turned on.
7. Press the DIGITAL IN button on the DA-88 to select the TDIF-1 interface as the audio signal source.
8. Press the CLOCK button on the DA-88 to select “WORD” sync.
9. Press the RECORD TRACK ASSIGN and PLAYBACK TRACK ASSSIGN buttons on the RC-24T to select tracks 1-4, 5-8,
or 1-8 (record only). Arm the corresponding tracks on the DA-88 for recording.
10. Record and play back tracks on the DA-88 as normal, using the AES/EBU (and SPDIF) input and output on the RC-24T as
the source and destination for the 24-bit digital audio signal.
DESCRIPTION
The RC 24T (or “PAQRAT”) allows you to record and play back stereo digital audio signals with up to 24 bits of resolution
using your Tascam DA-88 modular digital multitrack.
The RC 24T accomplishes this task by converting the AES/EBU (or SPDIF) stereo 24-bit digital audio source signal to four
16-bit channels compatible with Tascam’s proprietary “TDIF-1” DA-88 interface. The RC 24T simultaneously writes these
signals onto the DA-88 and reads them back off again. Controls on the front panel allow you to assign these four channels to
tracks 1-4, 5-8, or 1-8 (two identical groups of four tracks) on the DA-88. The odd tracks carry the upper 16 bits of the original
digital audio signal, and the even tracks carry the lower eight bits plus a -20dB reference tone.
Note: Although it is nearly impossible to achieve better than 20-bit performance from today’s A/D converters, we refer to
the high resolution inputs and outputs to/from the PAQRAT as 24-bit anyway, just to simplify things. You can interface any
AES/EBU or SPDIF signal to the input and output of the PAQRAT from 1 to 24 bits.
FRONT PANEL DESCRIPTION
1. POWER LED. When dim, this LED indicates that you forgot to plug in the RC-24T.
2. SYNC LED. Indicates that a suitable AES/EBU (or SPDIF) sync source is plugged in. If this LED is not lit, the RC-24T is
not receiving signal from a source. Check the INPUT SELECT switch to make sure the proper input is selected. The RC-
24T generates WORD SYNC from the AES/EBU INPUT and feeds it to the DA-88. It is necessary for the ADC (or other
44.1kHz or 48kHz sync source with AES/EBU or SPDIF output) to feed the RC-24T AES/EBU or SPDIF Input at all times
(whether you’re recording or playing). It is highly recommended that the same sync source be used while recording or
playing back.
3. TRANSPORT PRESENT LED . When lit, this LED indicates that a DA-88 is connected to the RC-24T via the TDIF-1
connector.
4. RECORD TRACK ASSIGN BUTTON . This push button switch lets you select which four tracks of the DA-88 are
recorded with the stereo 24-bit digital audio source signal. An LED indicates whether you are recording onto tracks 1-4 or
5-8.
5. RECORD TRACK ASSIGN “BOTH” BUTTON . This push button selects all 8 tracks for recording, no matter what the
state of the RECORD TRACK ASSIGN BUTTON (previous section) is. Tracks 1-4 are identical to tracks 5-8. Use this
option when you are archiving a stereo master, and wish to create a redundant copy on the same tape.
6. PLAYBACK TRACK ASSIGN BUTTON . This push button switch lets you select which four tracks of the DA-88 are
converted back to 24-bit AES/EBU, and transmitted out the AES/EBU OUTPUT. An LED indicates whether you are
playing tracks 1-4 or 5-8.
7. SAMPLE RATE LEDS . These LEDs indicate the sample rate of the AES/EBU or SPDIF source (sync) Input (44.1kHz or
48kHz).
8. SOURCE WORD LENGTH LEDS . These LEDs indicate the word length (in bits) of the AES/EBU or SPDIF Input.
9. 16-BIT DITHERED OUTPUT ENGAGE SWITCH. This switch engages 16-bit dithering and truncation on the AES/
EBU OUTPUT. Dither should be engaged when the AES/EBU OUTPUT is feeding a device that truncates the signal to 16
bits (e.g. DAT recorder, digital signal processors, and so on). The dithering used by the RC-24T follows the Triangular
Probably Density Function described by Stanley Lipshitz and John Vanderkooy in their paper: “Resolution below the least
significant bit...”.
REAR PANEL DESCRIPTION
1. AES/EBU OUTPUT. The AES/EBU OUTPUT transmits digital audio conforming to the AES/EBU standard. Digital audio
exiting this Output is identical to the original digital audio fed to the AES/EBU (or SPDIF) INPUT and recorded onto the
DA-88. This Output is typically connected to a D/A converter, hard disk recorder or a CD mastering system. The AES/EBU
OUTPUT follows international conventions, with pin 2 hot, pin 3 negative, and pin 1 tied to chassis ground.
2. AES/EBU INPUT. The AES/EBU Input receives digital audio following the AES/EBU standard. This Input follows
international conventions, with pin 2 hot, pin 3 negative, and pin 1 tied to chassis ground. This input is typically connected
to the digital audio source, such as an A/D converter or the output of a digital mixer.
3. SPDIF INPUT. The SPDIF Input is just like the AES/EBU INPUT, except data received here is formatted with the con-
sumer “Sony Philips Digital Interface Format”.
4. INPUT SELECT SWITCH. This switch allows you to select the desired input (SPDIF or AES/EBU). Another way of
putting it is: you must select the proper input (the one you plugged a cable into). Note: The RC 24T generates the DA-88
WORD SYNC from the AES/EBU (or SPDIF) input. Therefore, it is necessary for the A/D converter (or whatever your
AES/EBU source is) to feed the PAQRAT AES/EBU (or SPDIF) INPUT at all times (whether you’re recording or playing
back).
5. TDIF-1. This connector interfaces the RC-24T to the DA-88 modular digital multitrack. A TDIF cable must be used! DO
NOT USE A STANDARD COMPUTER CABLE WITH THIS INTERFACE! The connectors are not wired the same! Use only
a Rane part #280-100 or Tascam part #PW-88D.
6. WORD SYNC OUT. This Output sends a digital audio synchronization signal to the DA-88. It must be connected to the
DA-88’s WORD SYNC IN connector with a typical BNC cable (terminated with male BNC plugs on each end). Failure to
connect this cable will prevent the RC-24T from synchronizing with the DA-88.
7. POWER INPUT. Plug the external power supply into this connector. Caution: Never connect anything except the Rane
RS 1 AC power supply (enclosed with the unit) to the thing that looks like a red telephone jack on the rear of the RC-24T.
This is a low-voltage AC power input, and connecting it to telephones, computer keyboards, or other devices will result in
unpredictable, and potentially catastrophic, results. If you want to destroy your RC-24T, we suggest wiring it to the output
of a power amplifier, or dropping it out of an airplane.
FCC & VDE NOTICE
This equipment has been tested and found to comply
with the limits for a Class A digital device, pursuant to Part
15 of the FCC Rules, and similar requirements found in
European specifications VDE 0871/0875. These limits are
designed to provide reasonable protection against harmful
interference when the equipment is operated in a commer-
cial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used
in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation
of this equipment in residential area is likely to cause
harmful interference in which case the user will be
required to correct the interference at their own expense.
USE OF SHIELDED DIGITAL CABLES IS REQUIRED
FOR FCC COMPLIANCE.
IMPORTANT NOTE
Product specificaties
| Merk: | Rane |
| Categorie: | Mengpaneel |
| Model: | RC 24T |
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