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MDS 05-2818A01, Rev. C
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Transmit Audio Level, R9
While monitoring the transmitted signal on a communications ser vice monitor,
adjust the Transmit Audio Level control (TX AUDIO), R9, to achieve the
desired deviation level—2.5 kHz for 12.5 kHz channel operation, and 3.0 kHz
for 25 kHz channel operation. The
face/Utility Board, can be used to manually key the transmitter during this
adjustment. The audio present on Pins 1 and 2 of TB1 is used to modulate the
transmitter. The level must be within the range of –20 dBm to +10 dBm.
Receive Audio Level, R10
The Receive Audio Level control (RX AUDIO), R10, is used to set the out-
going signal level to Pins 4 and 5 of J1. With an actual or simulated signal
being received by the transceiver, adjust R10 to achieve the desired line level
signal to the associated remote equipment. The maximum output level is + 6
dBm at 600. Consult the RTU manual for specific recommendations.
Order Wire Levels (Analog Interface/Utility Board, P/N
03-2110A01)
The MDS P-60 Analog Interface/Utility Board has an Order Wire Level con-
trol, R28, used to set the transmit modulation level (deviation) of the audio
from the local Order Wire handset's microphone. The Order Wire handset is
plugged into J1 on the Interface/Utility Board.
While monitoring the transmitted signal on a communications ser vice monitor,
adjust the Order Wire Level control, R28, to achieve the desired deviation
level—2.5 kHz for 12.5 kHz channel operation, and 3.0 kHz for 25 kHz
channel operation. The radio is keyed automatically by speaking into the Order
Wire handset.
Order Wire Levels (Digital Interface/Utility Board, P/N
03-2472A01)
The MDS P-60 Digital Interface/Utility Board has an Order Wire Level con-
trol, R13, used to set the transmit modulation level (deviation) of the audio
from the local Order Wire handset's microphone. The Order Wire handset is
plugged into J1 on the Interface/Utility Board.
While monitoring the transmitted signal on a communications ser vice monitor,
adjust the Order Wire Level control, R13, to achieve the desired deviation
level—2.5 kHz for 12.5 kHz channel operation, and 3.0 kHz for 25 kHz
channel operation. The radio is keyed automatically by speaking into the Order
Wire handset (VOX).
Unintentional sound picked up by the Order Wire handset may key
NOTE:
the transmitter and interrupt the normal data flow through the trans-
ceiver. To prevent erratic operation of the system, remove the Order
Wire handset from the packaged syst e ms when the Order Wire is not
in use.
MDS P-60/P-60 HL Reference Manual
switch, SW1, on the Inter-
TX TEST
53
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