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TRML R
C
EMOTE
ONTROL
While applying an RF signal modulated with 1000Hz tone at 60% system deviation to the base station receiver,
adjust the termination panel line output for 0dBm to the phone line. Adjust all remotes and each line used as
follows:
Note:
Adjustments and measurements are located and taken on the middle board.
Line 1:
a. Apply RF signal as described above.
b. Connect a scope or analog AC volt meter to ground and U10 pin 1.
c. With R154 fully counter-clockwise, adjust in a clockwise direction until the AC voltage level on scope
(approx. 1Vpp) or meter (approx. 370mVrms) just stops increasing. This point is the threshold of
compression for Line 1.
d. Remove the RF signal from the base station and proceed to the next line input adjustment.
Line 2:
a. Apply RF signal as described above.
b. Connect a scope or analog AC volt meter to ground and U10 pin 8.
c. With R159 fully counter-clockwise, adjust in a clockwise direction until the AC voltage level on scope
(approx. 1Vpp) or meter (approx. 370mVrms) just stops increasing. This point is the threshold of
compression for Line 2.
d. Remove the RF signal from the base station and proceed to the next line input adjustment.
Line 3:
a. Apply RF signal as described above.
b. Connect a scope or analog AC volt meter to ground and U19 pin 1.
c. With R174 fully counter-clockwise, adjust in a clockwise direction until the AC voltage level on scope
(approx. 1Vpp) or meter (approx. 370mVrms) just stops increasing. This point is the threshold of
compression for Line 3.
d. Remove the RF signal from the base station and proceed to the next line input adjustment.
Line 4:
a. Apply RF signal as described above.
b. Connect a scope or analog AC volt meter to ground and U19 pin 8.
c. With R155 fully counter-clockwise, adjust in a clockwise direction until the AC voltage level on scope
(approx. 1Vpp) or meter (approx. 370mVrms) just stops increasing. This point is the threshold of
compression for Line 4.
d. Remove the RF signal from the base station.
Tx Line Output
This level is preset at the factory for 0dBm out to the phone line and may not require readjustment at installation. If
needed, the procedure for each line used is as follows:
Note:
Adjustments are located on the middle board and baseboard of the TRML and measurements are taken at
the termination panel which may require two people to perform the procedure.
Line 1:
a. With the handset off-hook, if applicable, press the intercom button (the handset PTT can be used but
audio may be passed over the air) and adjust the Line 1 Tx audio pot (R125) while saying and holding
the word "Five" into the handset until 0dBm is measured across the phone line at the termination panel.
b. Turn "on" dip switch 7 (located on bottom of unit) and key the remote to lock up the 1950Hz function
tone. Adjust R80 tone level (located on baseboard, underneath middle board) until the 1950Hz
function tone measures 0dBm across the phone line at the termination panel.
c. Return dip switch 7 to the "off" position and proceed to the next line output adjustment.
Line 2:
a. With the handset off-hook, if applicable, press the intercom button (the handset PTT can be used but
audio may be passed over the air) and adjust the Line 2 Tx audio pot (R142) while saying and holding
the word "Five" into the handset until 0dBm is measured across the phone line at the termination panel.
b. Turn "on" dip switch 7 (located on bottom of unit) and key the remote to lock up the 1950Hz function
tone. Adjust R80 tone level (located on baseboard, underneath middle board) until the 1950Hz
function tone measures 0dBm across the phone line at the termination panel.
c. Return dip switch 7 to the "off" position and proceed to the next line output adjustment.
11
C
ONSOLE
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