Rane FDA 18 Handleiding
Rane
Mengpaneel
FDA 18
Bekijk gratis de handleiding van Rane FDA 18 (4 pagina’s), behorend tot de categorie Mengpaneel. Deze gids werd als nuttig beoordeeld door 5 mensen en kreeg gemiddeld 3.8 sterren uit 3 reviews. Heb je een vraag over Rane FDA 18 of wil je andere gebruikers van dit product iets vragen? Stel een vraag
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OPERATING / SERVICE MANUAL
FDA 18
QUICK START
You’re in a hurry, so you better read this quick, so you can get started right away.
The input may be mic or line level. Choose by pressing the pushbutton located near the
MASTER control. A balanced input uses “+” as hot, “–” as return and GND as shield ground. An
unbalanced input should connect to “+” and GND. Leave “–” unconnected.
The outputs are “+” and “–”. Normally GND is not used on the sending end. Ground the
shield only at the receiving end.
Signal for the outputs is sourced either before or after the MASTER level control. The switches
which determine this are located within the confines of the unit’s covers. All FDA 18s are
shipped from the factory with the switches in the POST position.
Once the input and outputs are satisfactorily connected, set the input gain as high as possible
without causing the overload (OL) indicator to illuminate steadily with very high input levels.
NEVER CONNECT ANYTHING EXCEPT AN APPROVED RANE POWER SUPPLY TO
THE RED THING THAT LOOKS LIKE A TELEPHONE JACK ON THE REAR OF THE FDA
18. This is an AC input and requires special attention if you do not have a power supply EX-
ACTLY like the one that was originally packed with your unit. See the full explanation of the
power supply requirements elsewhere in this manual.
SYSTEM CONNECTION
When connecting the FDA 18 to other components in your system for the first time, LEAVE
THE POWER SUPPLY FOR LAST. This gives you a chance to make mistakes and correct them
without damage to your fragile speakers, ears and nerves.
INPUTS. The input on the FDA 18 is fully differentially balanced, i.e., it is a true instrumenta-
tion amplifier. It may also be used in an unbalanced configuration. Use only shielded cable for
your input. This wire should always be two-conductor plus shield, even for unbalanced operation.
Balanced inputs should be connected to the “+” pin and “–” pin for signal hot and return. The
shield should be tied to GND. A neutral “pin 1” ground is not necessary (except when using phan-
tom power). For unbalanced use, connect the hot side of the input cable to “+” and the signal re-
turn to GND. It is never necessary on any Rane Flex module to ground the pin 3 input in the
unbalanced mode; however, it won’t hurt anything either. If the input is coming from another
piece of equipment (as opposed to a mic), connect the shield only at the receiving end to help pre-
vent ground induced hum. If a microphone is the source, connect the shield to the case of the mic
as well as pin 1, and to the ground terminal on the unit. This is mandatory when using phantom
power.
OUTPUTS. The FDA 18’s outputs are fully balanced using a cross-coupled type of output line
driver stage. Use two conductor shielded cable for interconnecting to the next piece of equip-
ment. Normally, grounding the shield only at the receiving unit gives the best shielding, and the
most hum-free performance.
The cross-coupled output stage is capable of driving lines as long as 1000 without problems.
Longer lines (in excess of a mile) can be driven by directly paralleling two outputs.
FRONT PANEL DESCRIPTION
7. POWER INDICATOR. When this little yellow LED illuminates, the foregoing informa-
tion applies. If darkness persists at this location — ignore the above. Pity.
6. OUTPUT LEVEL CONTROLS. These concentric controls set each individual output
level. The inner knobs are for odd numbered channels, and the outer knobs are for even
numbered channels.
5. MIC/LINE SWITCH. In the out position, the input is scaled for microphone input lev-
els. In the depressed position, the input stage is set for line-level input.
4. MASTER LEVEL CONTROL. This control sets the signal level appearing on the inter-
nal distribution bus. Output levels may be selected via the four pairs of concentric controls
connected to the output sections. This is true, however, only if the internal PRE/POST
switches are in the POST position (as shipped).
In the PRE position, the MASTER level control is bypassed for that respective output
and only the input GAIN control and the individual OUTPUT level control has any affect.
3. PHANTOM POWER SWITCH AND INDICATOR. In the ON position (LED on),
15 VDC phantom power appears on each input terminal on the rear of the module.
2. OVERLOAD INDICATOR. This red LED illuminates whenever the combination of
input level and input gain adjustment causes the input amplifier to reach or exceed a level
equal to 4 dB below clipping.
1. INPUT GAIN CONTROL. This control sets the gain of the input. The adjustment
MIN to MAX range is from 26 dB to 70 dB when MIC is selected, and from -7 dB to 37 dB
for LINE sources. Set the highest level that does not cause the OL indicator to come on
continuously.
REAR PANEL DESCRIPTION
1. INPUT TERMINALS. Use these for either a microphone or a line level input to be dis-
tributed by the FDA 18. Connect a balanced source to the respective “+”, “–” and GND
pins (pins 2, 3 and 1 respectively). An unbalanced input should connect to “+” and GND
only. When using an unbalanced input, you may leave “–” open, or short it to GND, doesn’t
matter.
2. OUTPUT
TERMINALS. Balanced output for each channel. Connect two-conductor
shielded cable to “+” and “–”.
Normally the shield is tied only at the next unit’s input.
For unbalanced use, you must ground the “–”
output, Failure to do so results in im-
proper operation.
3. GROUND LIFT SWITCH. This switch (mounted on the side) provides the ability to sepa-
rate chassis ground and signal ground. Normally, this switch should be in the LIFT position
(pull toward the rear). In some circumstances it may be necessary to move it to the opposite
position to eliminate stubborn hum and buzz problems.
We realize a scientific explanation of this switch would be helpful, unfortunately science
doesn’t seem to have much to do with it. See the CHASSIS GROUNDING note on the last
page for details.
If you are tempted to try moving this switch with your power amplifiers turned on or turned
up, DON’T BE. ALWAYS TURN YOUR AMPLIFIER LEVELS DOWN BEFORE
CHANGING YOUR GROUNDS AROUND and then bring them up slowly.
4. POWER INPUT CONNECTOR. USE ONLY A MODEL RS 1, FRS 8, RAP 10, OR
OTHER REMOTE AC POWER SUPPLY APPROVED BY RANE. The FDA 18 is supplied
with a remote power supply suitable for connection to this input jack. Consult the factory for
replacement or substitution.
5. CHASSIS GROUND POINT. A 6-32 threaded hole used for chassis grounding purposes.
See the CHASSIS GROUNDING note on the last page for details.
NOTE: ASSIGN SWITCHES SHIPPED IN “POST” POSITIONS
Product specificaties
| Merk: | Rane |
| Categorie: | Mengpaneel |
| Model: | FDA 18 |
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