Using Diversity Modes - Lectrosonics DCR822 Instruction Manual

DCR822
NOTE: If the frequency is blinking, it means that
the currently tuned frequency is not in the selected
group. If it is steady, it means that the currently
tuned frequency is in the selected group. Choose
No Group to exit the group tuning mode and thus
have access to any frequencies within the tuning
range of the receiver..
• Four tuning groups are available, U, V, W, X, with
each containing up to 32 frequencies.
• Each group has the option to add or delete a fre-
quency from the list on the right. Use the UP and
DOWN arrows to change frequencies, MENU/SEL
to move through the options, and the UP arrow to
select ADD or DELETE. Push the PWR/BACK but-
ton to return to the Frequency Screen.
• Each group can store up to 32 frequencies to the
microSD card.
• The user can also send or get all frequency groups
(through the IR & Sync screen).
To add or remove frequencies from a tuning group, see
Group Edit below.
Scan:
Scans for an open frequency and shows a graphic
representation of RF energy in the area, by frequency.
Press MENU/SEL to begin the scan. You can pause the
scan by pressing MENU/SEL a second time. Pressing
MENU/SEL again changes receiver channels.
Scan Zoom:
To zoom the screen, first pause the screen. Press
the UP+DOWN buttons to see another scan. Press-
ing MENU/SEL clears changes. To exit the zoomed
view, press UP+DOWN again to return to the previous
screen.
S c a n Z o o m e d
5 2 5 . 1 0 0
Clear Scan:
Clears scan results. Highlight CLEAR SCAN in the
menu, then press MENU/SEL. The screen will quickly
show Scan Data Cleared.
Group Edit:
Allows the user to add, and delete frequencies within
the available tuning groups. Use the MENU/SEL button
to move the cursor between the group selector and the
list of frequencies within that group (if any). With the
cursor on the Group selector, use the UP or DOWN ar-
row buttons to select from the four available groups: u,
v, w and x. Once the desired group has been selected,
Press the MENU/SEL button together with the UP but-
14
ton to add a new frequency to the group. The cursor will
highlight MHz. Use the UP or DOWN buttons to change
the value. Press the MENU/SEL button to move the
cursor to the kHz value. Use the UP or DOWN arrows to
change the value. When finished, press the MENU/SEL
button again, and "Go" will appear at the bottom right.
Press the DOWN button to complete the operation.
To add additional frequencies to the group, follow the
same steps above again. To delete frequencies from the
group, press MENU/SEL to move the cursor to the first
frequency in the list. Then, use the UP or DOWN but-
tons to select the frequency you wish to remove. Press
the MENU/SEL and DOWN buttons together to delete
that frequency from the list.
To load or save groups to the microSD card, see the
section on SD Card Settings. To share groups via IR
sync, see the section on IR & Keys.
When adding frequencies that may exist in more than
one block (470/19, 23 or 24 and block 606), a prompt
will appea for the applicable block, which then becomes
selectable. The purpose of this is to ensure that the cor-
rect pilot tone is used, when in a Digital Hybrid compat-
ibility mode (NA Hyb, EU Hyb, NU Hyb, JA Hyb). The
exact ranges of the overlapping regions are:
· 606.000 to 613.375 MHz: block 23 and block 606
· 614.400 to 631.575 MHz: block 24 and block 606
· 486.400 to 495.675 MHz: block 470 and block 19
Diversity:
Choose between: Vector or Frequency. Diversity
modes safeguard against loss of audio signal caused
by Multipath. If you choose Frequency, the system will
ask you to calibrate. The calibration step is necessary
for matching audio levels between channels for proper
orientation.

Using Diversity Modes

Two diversity reception modes are available:
• Vector Diversity uses one receiver module per
audio channel.
• Frequency Diversity uses two receiver channels
and two transmitters per audio channel. The sec-
ond receiver will automatically be set to the same
Compat Mode as CH1 when this diversity mode is
selected.
Vector Diversity
Vector Diversity works by expressing the signal from
each antenna in angle and magnitude (vector). This
makes it possible to continuously rotate one of the
vectors mathematically so the angles match and the
signals can be combined constructively. In this way, all
the energy that is available at both antennas is always
fully contributing to the receiver's performance.
Frequency Diversity
Frequency Diversity differs from vector diversity in that it
uses both receiver channels and two transmitters oper-
ating on different frequencies. The purpose of this mode
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