Line Outputs; Phones - RME Audio Hammerfall HDSP 9632 User Manual

24.2 Line Outputs

The short circuit protected, low impedance line outputs (channels 11/12) are available as un-
balanced outputs via phono breakout cable. The optional analog XLR breakout cable provides
XLR connectors and fully balanced operation.
The electronic output stage does not operate servo balanced! When connecting unbal-
anced equipment, make sure pin 3 of the XLR output is not connected. A conection to
ground will cause a decreased THD (higher distortion)!
To maintain an optimum level for devices connected to the analog outputs, the HDSP 9632
internally uses hi-quality electronic switches, which allow for a perfect adaptation of all outputs
to the three most often used studio levels.
As with the analog inputs, the analog output levels are defined to maintain a problem-free op-
eration with most other devices. The headroom of the HDSP 9632 lies between 9 and 15 dB,
according to the chosen reference level:
Reference
Hi Gain
+4 dBu
-10 dBV
With +4 dBu selected, the according headroom meets the latest EBU recommendations for
Broadcast usage. At -10 dBV a headroom of 12 dB is common practice, each mixing desk op-
erating at -10 dBV is able to send and receive much higher levels. Hi Gain is best suited for
professional users who prefer to work balanced and at highest levels. Hi Gain provides 15 dB
headroom at +4 dBu nominal level.
When using the analog XLR breakout cable, make sure 'Breakout Cable / XLR' is selected
in the Settings dialog. Else the analog output level will be 6 dB too high!
Note that not checking XLR with balanced cables will cause an output level of +25 dBu @ 0
dBFS. Reducing the output level by 1 dB within TotalMix then makes the HDSP 9632's analog
outputs compatible to SMPTE (+24 dBu, 15dB headroom).
24.3 Headphones
Channels 11/12 of the HDSP 9632 are also available via an 1/4" TRS jack (stereo output). This
output is optimized for headphone operation. A speaker protection circuit prevents noise on
power up and power down of the computer. The output delivers the same signal as the Line
outputs, and its volume is adjusted in the same way via TotalMix. Additionally, the Settings dia-
log provides level adjustment 0 dB, -6 dB, -12 dB and Mute, independent of the Line output.
Thus the level balance between headphones and monitors is easily optimized. When used as
high-quality but unbalanced Line output, these options realize a level adjustment similar to the
+4/-10 choices of the Line I/Os.
In case the headphone output should oper-
ate as Line output, an adapter TRS plug to
RCA phono plugs, or TRS plug to TS plugs
is required.
The pin assignment follows international
standards. The left channel is connected to
the tip, the right channel to the ring of the
TRS jack/plug.
0 dBFS @
+19 dBu
+13 dBu
+2 dBV
User's Guide HDSP System HDSP 9632 © RME
Headroom
15 dB
9 dB
12 dB
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