User's Manual

Canam Technology, Inc. (CTI)
MARK-IV CHANNELIZED (Class A Narrowband) SIGNAL BOOSTER WITH AUTOMATIC
OUTPUT LEVEL CONTROL M4-ChOLC
User’s Operations and Maintenance Manual (O&M)
After this adjustment, the M4-ChOLC will provide the same Power Output regardless of the
input signal power (the input power should not be higher than -10 dBm, otherwise the M4-
ChOLC may damage).
Figure 11: Output Power Adjustment Setup
F.3 M4-ChOLC RX Threshold Level
The Rx Threshold Level is used to set up the Input Power Level required for a signal to be
retransmitted by the device. Input signals below this threshold are not amplified.
In order to adjust this level, use the circuit shown in
Figure 12. Set the RF Generator
frequency to the same M4-ChOLC frequency and its output level to the desired threshold.
Turn the M4-ChOLC Rx Threshold Level potentiometer all the way clockwise. The RX OK Led
should be off. There should be no signal present at the output of the M4-ChOLC.
Turn the Rx Threshold Level Adjustment counter-clockwise until the RF OK Indicator turns on
and the module delivers the signal out.
Figure 12: Rx Threshold Level Setup
F.4 M4-ChOLC Status and Alarms
The M4-ChOLC provides TTL Compatible output signals that can be used by a SCADA system
to monitor the status of the M4-ChOLC unit.
The signals can be accessed through an 8-pin mini-DIN connector located on the M4-
ChOLC Front Panel (Refer to
Figure 7). The connector’s pin out is shown in Figure 13.
MARK-IV CHANNELIZED Signal Booster module (M4-ChOLC) O&M Manual Page 16 of 20