Programming The Ctcss/Dcs Codes; Monitoring Function - Midland Alan HP450 2A Rugged Manual De Instrucciones

call. To communicate in confidential mode, enable the scrambler
O 6.5.
2 If you need to use the HP450 2A radio next to electric equipment
that generates impulses that frequently enable the squelch of
the radio (that is the radio cannot be permanently silenced when
there are signals and noise can be occasionally perceived), it is
generally preferable to use the restricted traffic mode.

5.9 Programming the CTCSS/dCS codes

It is possible to change the CTCSS tones or DCS codes on all the
channels. You can set different codes in TX and RX.
5.9.a Selecting the CTCSS tones
1) Select the operating channel.
2) Press MENU twice. CTC displays on the left along with the
flashing value that has been set on the right: oF (disabled) or a
number ranging from 1 to 38 (CTCSS tone), depending on the
channel in use.
3) Press p or q to select the CTCSS tone in RX.
4) Press PTT to store the tone (or wait five seconds).
5) Press MENU three times. The led blinks red.
6) Press p or q to select the desired CTCSS tone in TX. Push PTT
to store the tone (or wait 5 seconds)
5.9.b Selecting the DCS codes
1) Select the operating channel.
2) Press MENU three times. dCS displays on the left along with the
flashing value that has been set on the right: oF (disabled) or a
12
number ranging from 1 to 83, depending on the DCS code used.
3) Press p or q to select the DCS setting in RX.
4) Press PTT or wait five seconds to store the DCS code.
5) Push MENU three times. The led blinks red.
6) Push p/qto select the DCS code in TX.Push PTT to store the
DCS code in TX.
5.9.c LED operation with CTCSS/DCS
When you use the restricted traffic mode, the status LED provides
slightly different indications as compared to those of the open traffic
mode:
• Off: indicates that no signal is being received (as in the open
traffic mode)
• Green: indicates that a signal with a correct CTCSS/DCS tone is
being received (it is enabled together with the radio volume)
• Orange: indicates the receipt of a signal without a CTCSS/DCS
tone or with a different CTCSS/DCS tone (the volume will not be
enabled)
• Red: indicates that the transmission is in progress (as in the open
traffic mode)
5.10 Monitoring function - Monitor/squelch
This feature can be used to monitor the selected channel before
transmitting and receiving low intensity signals. Press MON to
disable the mode (CTCSS).
To disable the squelch (noise reduction), hold MON down for
approximately 3 seconds. In this mode, you can hear all the noise
present in the environment.
2 The disabling of the squelch increases the consumption of the
battery power.