Ericsson EDACS LBI-39077 - Manual (Page 58)

LBI-39077 BALANCE AND LEVEL
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To adjust the Hardware Gain, choose the 'E&M4W to Ph.' menu item and the GTI Configurator will instruct the GTI unit to
call the number and return current settings.
A bar graph will appear with the current gain setting in the GTI unit.
In order to properly perform this adjustment, the GTI unit must generate a tone into the phone line. Press the 'TAB' key to
turn on the adjustment tone. Confirm that the tone is heard at the receiving end of the call. Pressing the 'TAB' key again will
toggle off the tone.
To adjust the gain, use the arrow keys to move the settings bar graph up and down. For finer adjustments, press the 'CTRL'
key along with the arrow keys to adjust in single increments.
Once the desired gain has been set, wait one second for the new level to be registered by the GTI Configurator. The GTI
Configurator will send the new setting to the GTI unit and receive a confirmation that the gain was set. In the intervening time
the bar graph will dim until it receives the confirmation.
Press the Enter key to finish the adjustment procedure and return to the menu. If the tone was left on, it will be turned off. If
you press the Enter key before the one second delay time, any new setting will not be sent.
Adjusting E&M 4-Wire Hardware Gain from Phone
This adjustment sets the from-phone hardware gain for E&M 4-wire lines.
Move the highlighted cursor to a 'FREE' E&M 4-wire line and press 'ENTER' to see available selections on the pop-up
window. To adjust the gain, you must first enter the milliwatt number under 'MW Setup' or in the database.
To adjust the Hardware Gain, choose the 'E&M4W from Ph.' menu item and the GTI Configurator will instruct the GTI unit
to call the number and return current settings.
Two bar graphs will appear: The upper graph shows the instantaneous level coming from the milliwatt number and should
represent the current milliwatt level. The lower graph will show the current gain setting in the GTI unit. If the level graph is
fluctuating significantly, you may have dialed the wrong number.
To adjust the gain, use the arrow keys to move the settings bar graph up and down. For finer adjustments, press the Ctrl key
along with the arrow keys to adjust in single increments.
Once the desired gain has been set, wait one second for the new gain to be registered by the GTI Configurator. The GTI
Configurator will send the new setting to the GTI unit and receive a confirmation that the gain was set. In the intervening time
the bar graph will dim until it receives the confirmation.
You should notice that the level changes in response each new setting. Adjust the levels to those given in the Installation
Manual.
Press the Enter key to finish the adjustment procedure and return to the menu. If you press the Enter key before the one
second delay time, any new setting will not be sent.
TERMINATION INTO 2-WIRE CIRCUITS
Adjusting E&M 4-Wire Microwave Balance
Although we refer to this as a 'Microwave' circuit, the method of transmission is not important to this adjustment. What is
important is that transmission is 4-wire and the line is terminated into a 2-wire circuit.
This operation allows an external hybrid terminated into a 2-wire circuit to be adjusted with a tone generated by the GTI into
the line and adjusting the hybrid's R/C values (Figure 1). A tone can be put into the hybrid and the received level view on the
GTI Configurator's bar graph (Figure 2).
Move the highlighted cursor to a 'FREE' E&M 4-wire line with a microwave connection and press 'ENTER' to see available
selections on the pop-up window. To observe the levels, you must first enter a silence number under 'Silence Setup' or in the
database.
To start the E&M 4-wire Microwave level viewing, choose the 'E&M4W Microwv' menu item and the GTI Configurator will
instruct the GTI unit to call the number.