Lectrosonics Venue Series (Wideband) User Manual download pdf (Page 14)

Venue Wideband Receiver

LECTROSONICS, INC.

When any Compat Mode other than Dig. Hybrid is se-

lected, FIXED will automatically be selected.

In this example, receiver modules 4, 5 and 6 are set to

the FIXED mode with no adjustment available.

Selecting Diversity Modes

Navigate to the DivMode setup screen.

Two diversity reception modes are available:

• Switched Diversity uses one receiver module per

audio channel.

• Ratio Diversity (OptiBlend

) uses two receiver

modules per audio channel.

Press the Receiver Select Buttons to enter the setup

screens for the receiver modules.

Switched Diversity

In this mode the signals from both antennas are com-

bined into a single receiver module, with the phase of

one of them inverted back and forth so that they always

add to one another. The process reduces dropouts and

provides a stronger signal than a single antenna.

Ratio Diversity (OptiBlend

)

Ratio diversity uses two adjacent receiver modules to

pick up a single transmitter. The audio outputs of the

modules are blended (mixed) together, using more or

less audio from each module based upon which module

has the stronger RF signal.

Ratio diversity anticipates dropouts before they occur,

rather than waiting until the RF signal level is very weak

and on the verge of noise or dropout. The comparison

of the RF signal levels in the modules begins when the

RF level is still high, so the circuit can blend in more

audio from the module with the stronger signal before

the signal decays enough to cause noise.

The blending action is smooth and seamless to avoid

any audible artifacts that can occur with abrupt switch-

ing. Most of the time both receiver modules have good

signals, so the audio is blended equally, which improves

the signal to noise ratio by 3 dB.

The blended audio appears at the rear panel XLR out-

puts of both modules.

Selecting the Tuning Mode

Pre-coordinated tuning groups are stored in memory to

simplify frequency coordination. The groups are labeled

GROUP a, b, c and d on the LCD, with eight frequen-

cies stored in each one. Refer to the section near the

back of this manual entitled Pre-coordinated Frequen-

cies for details on compatibility and using these groups.

Select a

through d

Three additional modes are also available to enable

compatibility with non-standard transmitters and storing

custom frequency sets. Navigate to the Tuning menu

andpresstheMENU/SELECTcontrol.

NORMAL MODE is the standard Lectrosonics mode

with 256 frequencies in 100 kHz steps. A unique pilot

tone is present for each frequency.

FINE MODE allows tuning to 1024 frequencies in

25 kHz steps for compatibility with older and non-

Lectrosonics transmitters. Pilot tone frequency is set to

the next lower even 100kHz frequency. For example,

650.000, 650.025, 650.050 and 650.075 all use the

same pilot tone frequency.

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Lectrosonics Venue Series (Wideband) User Manual Page 14

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