Installation
38
Setting the Transmit Deviation
Once the transmit audio level out of the remote desksets have been set, you can use any
remote in the system as a source of test tone for setting the base station transmitter
deviation.
Set up your service monitor to measure the deviation on one of the system’s channels.
Select a deskset and use it to select the same channel on the base station that you set the
service monitor for. Then enter the Setup mode by pressing function keys #1 and #8. Start
the Transmit Level Set test by pressing function key #4, and then press it again to select
the 1000 Hz test tone.
Now that you have a 1000 Hz tone at 0 dBm on the line, follow the procedure for your
base station or termination panel to set the final transmitter deviation to the proper level.
Remember that the remote will exit Setup mode automatically after two minutes of no
front panel key-press activity, so be ready to measure and adjust when you start this, or
you may have to put the remote back into the Setup mode when you are only half through.
When you are finished you can exit the test and the Setup mode by pressing either the
CLEAR key or function key #9 twice.
Adjusting the Equalization Curves
When pages are made, it is highly desirable that the paging tones all cause an equal
amount of deviation at the transmitter, regardless of their frequency. The transmission path
between the remotes and the transmitter can attenuate the paging tones selectively and
thus interfere with this happening. The remotes have two separate equalization curves
available that can be both set up and assigned to the various paging formats independently.
These equalization curves are only applied to the transmission of paging tones. They are
not used during the transmission of control tones or voice.
The equalization curves can be looked at, altered, or even set to one of four preset
equalization curves by using the off-line programming software (ZIPR) that is used to set
up the rest of the deskset’s features. The equalization curves shown on the PC cover the
audio spectrum from 300 to 3000 Hz (inclusive) in 28 steps of 100 Hz each. The relative
output level at each frequency can be adjusted over a range from -10 to +10 dB, in 1 dB
increments. While this feature of the ZIPR software is convenient, it does not allow you to
test the results of your adjustments in real time. To do that you need to set up your service
monitor and use one of the desksets in the Setup mode.
Set up your service monitor to measure deviation on one of the base station’s channels.
Select the same channel on one of the remotes and then place the remote in the Setup
mode by pressing function keys #1 and #8 together. Choose the equalization curve you
want to work on and press the appropriate key on the deskset’s DTMF keypad (see
). For this example press the digit “1” for equalization curve #1.