Installation
36
Press function key #4 to start the “Transmit Level Set” test. Cycle the same key until the
1000 Hz test tone is selected. The display should look like
be keyed and a 1000 Hz tone will be going out.
Figure 9: Transmit Level Set Screen
On the bottom of the remote, locate the potentiometer labeled “TX LVL 1” (R3) and adjust
it until meter across the transmit line reads 0 dBm, or 775 millivolts RMS (or 2.19 volts
peak-to-peak on an oscilloscope).
When finished, press the “CLEAR” key or function key #9 to terminate the test. Press the
same key again to exit the Setup mode.
Single Remote
No External Test Equipment
The method that follows is an alternate method, to be used only in the event that you need
to install a single remote without any test equipment available. It is only an approximation,
but it should be good enough to get you by in most systems until you can check the level
with a meter. JP1 (and JP2, JP7, and JP10 for Model 284) must be in position B
(unterminated) for this to work correctly.
Enter into the front panel Setup mode by pressing the function keys #1 and #8, as shown in
.
Enter into the Set Line Level test by pressing function key #7 on the remote. The display
will show the name of the test mode momentarily, and then switch to a screen that looks
something like
.
Figure 10: Line Level Set
Locate the potentiometer labeled “TX LVL 1” (R3) on the bottom of the unit and adjust it
until the digital dBm readout on the top line of the display reads +3.5 dBm.
Press the #7 function key again to exit the Line Level test, and then press the CLEAR key
or the #9 function key to exit the Setup mode.
Multiple Remotes
No External Test Equipment
The following steps can be followed in systems that have multiple remotes. It allows the
installer to use one of the remotes in the system as the test meter while setting the levels on
TX Test Tones
1000.0 Hz
-2.3 Tx dBm