Instruction manual

Connect Systems Inc. -Model TP-154 Page 5
ADJUSTMENTS
P1 PREAMP: The PREAMP control is used to match the audio
level from your receiver to the TP-154. To adjust,
a signal containing 100 HZ CTCSS with about 600 HZ
deviation must be applied to the receiver. Adjust
the PREAMP control until a level of 3V P-P is
observed at TP-1 using an oscilloscope. If an
oscilloscope is not available TP-1 should read 1V
RMS using a VOM.
This completes the adjustment of the PREAMP
control. Future adjustment should only be required
if the TP-154 is connected to a different
receiver.
P2 ID LEVEL: Courtesy beeps & CW ID level: Adjust for desired
modulation level of the courtesy beep and CW ID.
P3 RPT AUDIO: The REPEAT AUDIO control sets the level of the
voice audio. Set so that 3 khz. input deviation
causes 3 khz. output deviation. This will cause a
linear input/output relationship.
NOTE: The RPT AUDIO control should only be
adjusted after the PREAMP control has been
properly adjusted.
P4 COS: The COS control sets the COS input threshold
level. Measure the voltage at TP-2 with no signal.
Then measure the voltage again with a signal
applied. Adjust the COS control until the voltage
reading at TP-3 is approximately midway between
the two readings previously obtained at TP-2.
For example: If TP-2 read 2 volts with no signal,
and 4 volts with a signal applied to the receiver,
TP-3 would be set to read 3 volts.
IMPORTANT: If the COS polarity select strap JP-10
is set correct and the COS control is properly
adjusted the RECEIVE LED will illuminate when
there's a signal, and will go out when the signal
is removed.
P5 DCS: The DCS control sets the modulation level of
digital DCS.
P6 CTCSS: The CTCSS control sets the modulation level of
analog CTCSS.
P7 DTMF: The DTMF control adjusts the deviation of
theoutgoing DTMF transpond and regenerated
DTMF.Set for about 2.5 KHz. deviation.