Installation ~ LCD Programming

appropriate menu. Then press Enter. To descend a menu level (go deeper into the tree), press Enter. To ascend a menu level (go back toward the top of the tree), press ESC.

The Meter button will also access the Meter tree directly. The menu trees are structured in levels, such that the first level (top of the tree) branches into multiple subcategories (see Figure 2.7). These branches typically end when an adjustable parameter or viewable value is reached.

9

+12

+8

+4

Enter

Esc

0

Meter

-4

-10 -30

Figure 2.5. Front Panel Buttons

Adjusting a value

To adjust a parameter, first verify that it is flashing. If the parameter is not flashing, it cannot be adjusted until you press Enter. If the parameter is flashing, adjust the value with the Up and Down buttons. As the value is adjusted, the parameter is updated immediately. For example, if you adjust input gain, you should be able to hear the difference as it changes. To store the new value, press Enter. To discard the change and revert back to the old value, press ESC. In general, while adjusting parameters, numerical values do not wrap around when the end is reached. However, parameters that toggle between two values (or are a list of values) will wrap around. When adjusting a parameter, press and hold the Up or Down button for more than two seconds to scroll through the values at a faster rate.

Pressing ESC at the top of the tree has no effect.

GT1524 Parameters Worksheet

System-Wide Parameters

Program Parameter

Selection Range

 

 

 

 

 

Lock Panel

On, Off

 

 

 

 

 

Set Passcode

Any 5 Front Panel Keys (Enter)

 

 

 

 

 

RS232 Baud Rate

9.6, 19.2, 38.4 kbps

 

 

 

 

 

RS232 Flow Control

On, Off

 

 

 

 

 

Telco Auto Answer

On, Off

 

 

 

 

 

Telco Auto Disconnect

Off, Loop Drop, Call Prog, LD + CP

 

 

 

 

 

Telco Ring Indication

Off, 1, 2, 3, 4

 

 

 

 

 

Unit ID No.

Factory Programmed

 

 

 

 

 

*Timeout

0 - 15 (10)

 

 

 

 

 

*Telco Adapt Mode

Auto, Burst

 

 

 

 

 

*Hook Duration

50 ms, 500 ms

 

 

 

 

 

*Receive Reduction

On, Off

 

 

 

 

 

Meter

 

 

 

 

 

 

Program Parameter

Selection Range

 

 

 

 

 

Default Meter

Any Input/Output (Spkr/Line Out)

 

 

 

 

 

Input Channel

 

Mic/Line In

Aux In

4 Wire In

From Telco

 

Program Parameter

Selection Range

 

 

 

 

 

Gain Adjust

-20dB to 20dB (0)

 

 

 

 

 

Mic/Line Input

Mic 55dB, Mic 25 dB, Line

 

 

 

 

 

Mute

On, Off

 

 

 

 

 

Phantom Power

On, Off

 

 

 

 

 

AGC

On, Off

 

 

 

 

 

High-Pass Filter

On, Off

 

 

 

 

 

Echo Cancellation

On, Off

 

 

 

 

 

NLP Adjust

Off, Soft, Medium, Aggressive

 

 

 

 

 

Output Channel

 

Spkr/Line Out

Aux Out

4 Wire Out

To Telco

 

Program Parameter

Selection Range

 

 

 

 

 

Gain Adjust

-20dB to 20dB (0)

 

 

 

 

 

Mute

On, Off

 

 

 

 

 

Aux Out Mix (Mic/Line In)

On, Off

 

 

 

 

 

Aux Out Mix (Aux In)

On, Off

 

 

 

 

 

* Set up only by serial port

Figure 2.6. Parameters Worksheet

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ClearOne comm GT1524 operation manual Installation ~ LCD Programming, Adjusting a value