ZETRON 280, Руководство по эксплуатации продукта

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37
Level Setting of System Components
all the other remotes. Doing the test this way may require the installer to enlist the aid of
another person and set up temporary communications between the remote sites, depending
on the layout of the system and the distance between remotes. The remotes should be
connected to a base station or equivalent 600

termination during this test.
The last deskset in the system (the one set to 600

to terminate the line) will be used as
the level meter while setting the Tx level in the other remotes. Enter into the Setup mode
by pressing both function keys #1 and #8, as shown in
Figure 7 . When the setup screen is
displayed, press function key #3 to enter the RX dBm Meter function. The display will
show a digital readout on the top line that should look like
Figure 11 .
Figure 11: Rx dBm Meter Screen
On another deskset in the system, enter the Setup mode using the #1 and #8 function keys,
then press function key #4 to enter the Transmit Level Set function. Cycle the same key
again until the display on that deskset indicates that the test tone going out is at 1000 Hz.
Locate the potentiometer on the bottom of the deskset labeled “TX LVL 1”(R3) and adjust
it until the level read on the terminating remote’s display is +0.0 dBm for a 2-wire
installation, or +3.0 dBm for a 4-wire installation. Once this is done, press the CLEAR key
or function key #9 to stop the transmit tone. Then press the key again to exit the Setup
mode.
Repeat steps 2 and 3 for all of the other remotes in the system except the one being used as
a dBm meter.
Once you have finished with all of the other remotes in the system, return to the
terminating remote and press function key #3 again to take it out of the Rx dBm Meter
mode. Press function key #4 to place this remote in the Transmit Level Set mode. Cycle
the same key to select the 1000 Hz test tone.
Go to one of the other remotes and enter the Setup mode. Then press function key #3 to
start the Rx dBm Meter function. Adjust the “TX LVL 1”(R3) potentiometer on the
terminating remote until the Rx dBm meter reads +3.0 dBm (
NOT +0.0 dBm like the
other remotes).
Once you are finished, press the CLEAR key or function key #9 twice to cancel the test
mode and exit the Setup mode on the terminating remote. Then press function key #3 on
the remote acting as a meter, and finally press CLEAR or function key #9 to exit the Setup
mode on that remote as well.
-30 dBm