GAI-Tronics L3149B C200 Advanced Deskset - Manual (Page 43)

L3149B (C200) Advanced Tone Remote Desk Set Installation
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Using a Communications Service Analyzer, or other RF generator, inject a fully-quieted (e.g.1000 micro-
volt) signal into the antenna port of the base station. Enable the RF generator’s 1 kHz tone, modulated at
rated system deviation. Note the level of the 1 kHz tone imposed on the line at the remote line terminals.
Program the desk set’s line level to the setting that approximates the audio level previously measured.
Refer to the following table for these settings:
Setting Line Level (600 Ohm)
03 −10 dBm
07 −5 dBm
0C 0 dBm
18 +5 dBm
2D +10 dBm
If an RF service monitor is not available, use a portable or mobile radio. Transmit to the station and
measure the nominal voice audio on the desk set telephone line. Set the desk set receive level to the
nearest level that was measured according to the table above.
PROG 2/6 - Line In Sensitivity
After entering the main programming selection mode, press the
PROG 2/6
button to allow adjustment of
the line-in sensitivity. This adjustment allows the desk set to compensate for a range of 0 to 15 dB of
line loss in 3-dB increments. The compensation is considered a pre-gain to the line-in circuitry of the
desk set.
For example, if the RX audio output of the radio tone panel or TNA200 is 0 dBm and the telephone
system has 10 dB of line loss, the desk set line input sensitivity should be set to level 4 (−9 dBm) to
accommodate the 10 dB of incurred line loss. After pressing the
PROG 2/6
, the display indicates the
current line-in setting. The buttons function as follows:
Button Line-in Sensitivity Mode Function:
VOLUME
Up Decreases the line-in sensitivity or reduces the pre-gain for the line input.
VOLUME
Down Increases the line-in sensitivity or increases the pre-gain for the line input line.
TRANSMIT Saves the current setting and exits back to the main selection mode.
MONITOR Restores the previously programmed setting.
IC Exits the line-in sensitivity mode without saving the selection, but maintains the
current setting until the power to the unit is cycled. This is useful for experimenting
with different settings.
PROG 3/7 - Internal Diagnostics
There are four internal diagnostic modes available; dc module, relay module, RS-232, and keyboard.
After the internal diagnostic mode has been entered, they are accessed using the programming buttons as
follows: