Sony MB-806A Service Manual page 10

Channel Setting
Here is explained channel setting for the CE62
model as an example.
Take the following precautions to prevent interference
and noise.
• If there is a TV broadcasting station nearby, to avoid
possible interference from its broadcasting, do not
use that station's channel.
• When simultaneously using two or more tuners,
always set the tuners to different channels within the
same group (other than group 00).
1 2 2,3,4
1
+
GP
AF BATT
ON
RF
–
CH
GP CH
OFF
POWER
3,4
1
Turn the POWER switch on.
The message "CE62" appears on the display, and
then the current tuner status is displayed.
Note
Turn the POWER switch on after reducing the
volume of equipment connected to the TUNER
OUTPUT connector. Otherwise, noise will be
heard when the power is turned on.
2
Press and hold down the GP button, and press the
+ or – button to select a group.
Each time you press the + or – button, the GP
indication changes as shown in the following
figure. To change the indication continuously,
press and hold down the + or – button.
– +
GP CH GP CH
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The CH indication shows the lowest frequency
channel of the selected group. For group 00,
however, the channel selected last is displayed.
Releasing the buttons automatically cancels the
group and channel selection mode, and the
currently displayed group is selected.
For the CE69 model, the indication will cycle
from group 00 through H. For the AU66 model,
the indication will cycle from group 00 through
H2.
Refer to "Overview of Channel Plan" in the "Wireless
Channel Lists".
3
Press and hold down the CH button, and press the
+ or – button in 3 seconds to select a channel.
Similar to step 2, each time you press the + or –
button, the CH indication changes in the order
shown in the group and reception channel list.
(See "Wireless Channel Lists".)
If you press the + button when the last channel of
the selected group is displayed, the first channel
of the group will be displayed.
– +
GP CH GP CH
Selecting the reception channel by frequency
Press the + button.
This changes the GP/CH indication to a frequency
indication.
To change a frequency, press the + or – button
while keeping the CH button pressed. (A higher or
lower frequency will be displayed.)
Press the + button again to change the frequency
indication to a GP/CH indication.
– +
GP CH GP CH
4
If the desired channel or frequency is displayed,
release the CH button and + or – button.
The selected channel is set.
To store the selected group and channel
Leave the indication unchanged for 1 second.
The group and channel set in the procedure explained
above are stored in memory.
Automatic Search and Setting of
Available Channels
When you use the MB-806A Base Unit in a multi-
channel operation system, you can assign available
channels to all tuner units by operating the first tuner
unit only.
Note
Auto channel assignment function is available only
when the tuner base unit holds the tuner units in the
same TV channels.
1
Power off all wireless microphones and
transmitters.
2
On the first tuner unit, select the group to be used.
3
Press the CH button on the first tuner unit and hold
it down for 3 seconds.
The first tuner unit searches for available channels
in the selected group, and available channels in the
group are so assigned to all tuner units
automatically that two or more tuner units may not
use the same channel.
After automatic setting, you can adjust the groups
and channels of individual tuner units.
Notes
• Do not use group 00.
• If no channels are available, "NO CH" is displayed
and channel setting is aborted.
When using two MB-806A Base Units
When you use two base units, proceed as follows to
ensure that the two tuner units do not use the same
channel settings.
1
Follow the procedure explained above to set the
group and channel of the first base unit.
2
Power on the wireless microphones or transmitters
after adjusting them to the channels of each tuner
unit.
Note
If the microphones or transmitters are not powered
on, the two tuner units may use the same channel
twice.
3
On the first tuner unit of the second base unit, set
the same group as selected on the first base unit.
4
Press the CH button of the first tuner unit on the
second base unit and hold it down for 3 seconds.
Available channels in the same group (channels
not used by the first base unit) are automatically
set on the first tuner unit and the other tuner units
on the second base unit.
Note
If automatic channel setting dose not function well for
the second base unit (due to poor reception), set
channels manually for the second base unit.
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