Cambridge Audio AZUR 650R - Manual (Page 16)

16
The 650R allows level calibration to match the acoustic level between
different types/sizes or even manufacturers of speaker that may be being
used for each channel. This is achieved by adjusting the relative level of each
speaker. This can be done manually through the ‘Level Calibration’ menu in
the OSD or automatically, see the following Auto setup section of this manual.
The basic process for manual adjustment is to listen to or measure with an
SPL meter (more accurate and recommended but not essential) the level of
sound produced by each speaker and set relative levels for each speaker so
that they all sound the same loudness at the normal listening position. The
650R incorporates a Test Signal Generator (broad-band white noise) to
facilitate this.
Set the unit to a normal listening level or half maximum volume
approximately. Press the OSD button on the remote control then select the
‘Level Calibration’ menu. Now turn on the test signal by highlighting this item
and pressing the Left or Right arrows:
A “rushing” or “hissy” sound should be heard, initially through the Front Left
Speaker.
You can now move up and down the channels using Volume Up/Down on the
remote. Each time a new channel is selected the test signal will be heard to
move to that channel. Compare the loudness of all channels as heard at the
listening position.
Now adjust the channels so they all sound the same (in terms of loudness
only, channels of different frequency responses can sound different in terms
of the “tone” of the sound i.e. more or less hissy).
Pick the channel that sounds most different and select it to listen to the test
signal. Now adjust the relative level in dB (using Arrow left/right on the
remote) and continue comparing it to other channels until it is of equal
loudness. The level can be adjusted up to + or - 10dB in 1dB steps. Repeat
the process with the next loudest channel etc. Once all channels sound the
same in terms of loudness, press the OSD button again to save the settings
and exit the menu.
Auto speaker setup for Distance/Level
The 650R includes our simple automatic speaker setup system called
'CAMCAS' (Cambridge Audio Mic Controlled Auto Setup). The system performs
two sets of tests firstly checking which speakers are connected and whether
they are wired correctly and in phase then automatically measuring and
adjusting the speaker delay timings (i.e. distance setting ) and levels.
Before activating this feature the 'Decode Mode' (i.e. type of speaker
package e.g. 5.1, 6.1, 7.1) of the 650R and Large/Small/None status of each
speaker must be set correctly as per section 1. This is important as the unit
will only look for and check the speakers you have told it you have.
To perform Auto Distance/Level setup first connect the supplied microphone
to the front Left front panel audio input on the front panel and place it at your
normal listening position in the room.
Level calibration
Level Calibration
Test Signal : Off
Front L : 0dB
Front R : 0dB
Surround L : 0dB
Surround R : 0dB
Centre : 0dB
Subwoofer : 0dB
Surr. Back L : 0dB
Surr. Back R : 0dB
Return : [OSD]
Press the OSD button on the remote control to access the OSD and then
select the Speaker Setup Menu. Now select the option 'Auto Setup'. This will
access the 'Auto Setup Menu' as below.
Follow the on-screen instructions and press 'Enter' on the remote control
when ready to start the Auto Setup function.
Once activated the OSD will display the message below and the word
'AUTOSETUP' will also be displayed on the front panel of the 650R to confirm.
A series of test signals will now be output from all of the connected speaker
terminals of the 650R (including the Subwoofer output).
Once finished the unit will display a screen similar to the one below reporting
which speakers were found and any that appear out of phase.
If any speakers appear unconnected or out of phase carefully check the
connections on the speaker and the back of the unit. Also check any bi-wiring
links that might be present on the speaker. For any out of phase speakers
check that the relevant + terminal of the 650R goes to the + terminal of that
speaker and similarly the – terminal of the 650R goes to the – terminal of
the speaker for that channel.
If necessary press the OSD button to perform a retest or press Enter to start
the second part of the autosetup procedure as below.
Again a series of test signals will now be output from all of the connected
speaker terminals and Subwoofer. The 650R uses these to measure the
levels and distances (and hence introduce the correct delays) appropriate to
your speakers and room characteristics.
Auto Setup Menu
Plug the microphone
into the left channel
of Video3 on the front
panel and place the
microphone at normal
listening position and
height
Continue : [ENTER]
Cancel/Return : [OSD]
Audio Video S-Video
Direct
Analog
Stereo Direct
Optical Video 3 L
Auto Setup
R
Mute / Display
L
Auto Setup
Auto Setup Menu
The unit is now
checking which speakers
are connected and their
phase
Please wait........
Auto Setup Menu
The speakers that have
been found are:
L C R LS RS LB RB SW
All speakers are in
phase
Continue : [ENTER]
Retest/Return : [OSD]