HTX-404 440 MHz UHF FM Transceiver
(190-1140) Advanced Operation Faxback Doc. # 46640
This section describes some of your HTX-404's more advanced features.
Configuration Menu
Your HTX-404 has a configuration menu that lets you modify operation
settings. Each of the following sections explains how and when to use each
configuration setting. Follow these steps to turn on the configuration
menu and select options.
1. Press VF.
2. Press F + M-SET. The first menu item appears.
3. Press /\SC or \/SC to step down or up through the menu items. Rotate
TUNE to change the setting for any menu item.
4. Press PTT to exit the configuration menu and save all settings.
The configuration menu appears in the following order:
Code Factory Default Explanation
oS 5.000 Duplex separation (offset)
tc oFF Transmit sub-audible tone
rc oFF Receive sub-audible tone
Sr 20 Frequency step
Sc ti Scan resume
Sd 2.0 Scan delay time
S1 440.000 Lower scan range limit
S2 450.000 Upper scan range limit
ud dn Vacant channel scan direction
PS 1-16 Power save duty cycle
tE oFF Transmit inhibit
to oFF Transmit time-out
Lb 4 Priority-frequency channel lookback time
Ar oFF Touch-tone auto-reply
See the following sections for complete information regarding these
functions.
Duplex Separation Default
The duplex separation default (offset) controls the offset between the
transmit frequency and the receive frequency when you use the HTX-404 in
duplex mode, as with a repeater. Typically, on the 440 MHz band, repeaters
receive at a frequency 5 MHz lower or higher than they retransmit (repeat)
on. For example, if a repeater's input frequency is 444.340 MHz, its
output frequency is 449.340 MHz. The following is a list of the most
commonly used repeater pairs.
Output Input Output Input Output Input Output Input
442.000 447.000 442.600 447.600 443.200 448.200 443.800 448.800
442.025 447.025 442.625 447.625 443.225 448.225 443.825 448.825
442.050 447.050 442.650 447.650 443.250 448.250 443.850 448.850
442.075 447.075 442.675 447.675 443.275 448.275 443.875 448.875
442.100 447.100 442.700 447.700 443.300 448.300 443.900 448.900
442.125 447.125 442.725 447.725 443.325 448.325 443.925 448.925
442.150 447.150 442.750 447.750 443.350 448.350 443.950 448.950
442.175 447.175 442.775 447.775 443.375 448.375 443.975 448.975
442.200 447.200 442.800 447.800 443.400 448.400 444.000 449.000
442.225 447.225 442.825 447.825 443.425 448.425 444.025 449.025
442.250 447.250 442.850 447.850 443.450 448.450 444.050 449.050
442.275 447.250 442.875 447.875 443.475 448.475 444.075 449.075
442.300 447.300 442.900 447.900 443.500 448.500 444.100 449.100
442.325 447.325 442.925 447.925 443.525 448.525 444.125 449.125
442.350 447.350 442.950 447.950 443.550 448.550 444.150 449.150
442.375 447.375 442.975 447.975 443.575 448.575 444.175 449.175
442.400 447.400 443.000 448.000 443.600 448.600 444.200 449.200
442.425 447.425 443.025 448.025 443.625 448.625 444.225 449.225
442.450 447.450 443.050 448.050 443.650 448.650 444.250 449.250
442.475 447.475 443.075 448.075 443.675 448.675 444.275 449.275
442.500 447.500 443.100 448.100 443.700 448.700 444.300 449.300
442.525 447.525 443.125 448.125 443.725 448.725 444.325 449.325
442.550 447.550 443.150 448.150 443.750 448.750 444.350 449.350
442.575 447.575 443.175 448.175 443.775 448.775 444.375 449.375
Output Input
444.400 449.400
444.425 449.425
444.450 449.450
444.475 449.475
444.500 449.500
444.525 449.525
444.550 449.550
444.575 449.575
444.600 449.600
444.625 449.625
444.650 449.650
444.675 449.675
444.700 449.700
444.725 449.725
444.750 449.750
444.775 449.775
444.800 449.800
444.825 449.825
444.850 449.850
444.875 449.875
444.900 449.900
444.925 449.925
444.950 449.950
444.975 449.975
To operate with a repeater, you must transmit on the repeater's input
frequency and receive on the repeater's output frequency. If you
frequently use a repeater that does not have a 5 MHz offset, we recommend
you program the repeater frequency into one of the HTX-404's memories. You
can override the default offset for each memory.
To change the default offset, follow the steps in "Configuration Menu" to
display the oS menu item, and rotate TUNE to change the offset. The
HTX-404 lets you set the offset to be in the range from 0 MHz to 10 MHz in
steps as set by the frequency step option.
Tone-Coded Squelch (CTCSS)
Some repeaters require that you transmit a sub-audible tone to key-up the
repeater. You can set your HTX-404 to transmit any of the 38 standard
sub-audible tones. You can also limit incoming calls by setting your
HTX-404 to open the squelch only when someone transmits a sub-audible tone
you set.
To set a sub-audible transmit tone, follow the steps in "Configuration
Menu" to display tc. Then rotate TUNE to select the sub-audible tone. If
you do not want to transmit a sub-audible tone, rotate TUNE to select OFF.
To set a sub-audible receiver tone, follow the steps in "Configuration
Menu" to display rc. Then rotate TUNE to select the sub-audible tone. If
you do not want to use the receiver sub-audible tone to activate a
repeater, rotate TUNE to select OFF. Otherwise you only hear transmissions
that have the correct sub-audible tone when you activate tone squelch.
To turn on the sub-audible tone feature, press F + T-SQL. When you
transmit, the HTX-404 includes the sub-audible tone in the signal. To
receive, the incoming signal must have the correct sub-audible tone. You
can override the default sub-audible tones for any memory.
Freq. Freq. Freq. Freq. Freq.
Code (Hz) Code (Hz) Code (Hz) Code (Hz) Code (Hz)
XZ 67.0 ZZ 91.5 2b 118.8 5A 156.7 M2 210.7
XA 71.9 ZA 94.8 3Z 123.0 5B 162.2 M3 218.1
WA 74.4 ZB 97.4 3A 127.3 6Z 167.9 M4 225.7
XB 77.0 1Z 100.0 3B 131.8 6A 173.8 M5 233.6
WB 79.7 1A 103.5 4Z 136.5 6B 179.9 M6 241.8
YZ 82.5 1B 107.2 4A 141.3 7Z 186.2 M7 250.3
YA 85.4 2E 110.9 4B 146.2 7A 192.8
YB 88.5 2A 114.8 5Z 151.4 M1 203.5
Scan Options
Several menu items control how your HTX-404 operates when you scan. The
following sections describe how to set the frequency step rate, the scan
resume condition, the scan delay duration and the scan limits.
Frequency Step Rate
The frequency step rate affects the scanning mode, the tune control, and
/\SC or \/SC tuning. The factory default for the frequency step is 20 kHz.
When scanning, the HTX-404 scans up or down 20 kHz per step. To change the
frequency step rate, follow the steps in "Configuration Menu" to display
the Sr menu item, and rotate TUNE to change the frequency step rate. You
can set the step rate to 5, 10, 15, 20, 25, 50 or 100 kHz.
Scan Resume Condition
When you set the HTX-404 to scan either standard memories or the VFO mode,
the HTX-404 stops when it encounters a signal strong enough to break
squelch. At the factory setting, the HTX-404 resumes scanning in 10
seconds, even if the signal is still present. You can set scan resume to
one of the following.
ti Resumes scanning in 10 seconds.
cr Resumes scanning after the carrier drops and the scan delay expires.
(See "Setting the Scan Delay").
SE Does not resume scanning.
To change the scan resume condition, follow the steps in "Configuration
Menu" to display Sc. Then rotate TUNE to select the scan resume condition.
Note: The scan resume option does not affect priority scan. Priority scan
always resumes scanning after the carrier drops.
Scan Delay Duration
When you set the scan resume condition to cr (carrier), the HTX-404
resumes scanning after the carrier drops. The scan delay option lets you
set the HTX-404 to pause before resuming, so you can hear any reply. The
factory default for this option is 2 seconds.
To change the scan delay duration, follow the steps in "Configuration
Menu" to display Sd. Then rotate TUNE to select the scan delay duration.
You can set the delay to 0.5, 1, 2 or 4 seconds.
Note: The scan delay option also affects priority scan.
Scan Limits
When you press F + \/SC or F + /\SC, the HTX-404 scans only those
frequencies within a range you set with the scan limit options. To set the
scan limits, follow the steps in "Configuration Menu" to display S1. Use
either TUNE or the key pad to enter one of the frequency limits. Then
press \/SC to display S2 and enter the other frequency limit. You can
enter the higher frequency as either limit.
Vacant Scan Direction
The HTX-404's factory default for vacant scan is to scan down until it
finds an unused frequency. To change the vacant scan direction, follow the
steps in "Configuration Menu" to display ud. Then rotate TUNE to select
either UP or DN.
Power-Saving Feature
In the power-save mode, when the HTX-404 is not scanning, it turns on the
receiver for 1/20-second to check for any activity, and then turns off the
receiver for the time you set with the power-save configuration setting.
The factory default for this setting is to power down for 1/16 second.
To set the HTX-404 to save power, press F + SAVE until SAVE appears on the
display. To change the power save setting, follow the steps in
"Configuration Menu" to display PS. Then rotate TUNE to select the power
save setting. You can set the power-save setting to 1-2, 1-4, 1-8 or 1-16
(1/2, 1/4, 1/8 or 1/16 second).
Press F + SAVE again to turn off power save.
Preventing Transmissions
To prevent any transmissions using the HTX-404, turn on the transmit
inhibit function.
To turn on this function, follow the steps in "Configuration Menu" to
display tE. Then rotate TUNE to select oN. To enable transmissions, set
this option to OFF.
Limiting Transmissions Duration
When you communicate on the 70-CM band, you should keep your transmissions
as brief as possible. Most repeaters have built-in timers that limit
single transmissions to 3 minutes or less. You can set the HTX-404 to stop
transmitting and sound a beep if you exceed a set time limit with a single
transmission.
To set a transmit limit, follow the steps in "Configuration Menu" to
display to. Then rotate TUNE to select OFF, 30, 60 or 120 seconds.
Setting the Priority Scan Time
When you turn on priority scan, the HTX-404 checks the programmed
priority-frequency memories periodically to see if there is any activity.
As factory set, the HTX-404 checks the priority-frequency memories every 4
seconds.
To change the priority scan time, follow the steps in "Configuration Menu"
to display Lb. Then rotate TUNE to select 4, 8, 12 or 16 seconds.
Using Touch-Tone Features
Your HTX-404 has a built-in 16-key touch-tone encoder. You can manually
send touch tones, or send the tones from one of five DTMF memories. You
can also set your HTX-404 so it is silent until it receives a specific
sequence of touch tones.
Manually Sending Touch Tones
Some repeaters require you to enter a touch-tone code to key-up the
repeater. Also, some repeaters have autopatch devices that let you make
telephone calls through the repeater. To manually send the required tones,
press and hold down PTT. Then enter the touch-tone digits.
Notes: You must press D twice to send the D touch tone.
If the HTX-404's auto-reply feature is turned off, you can release
PTT after you enter the first digit. The HTX-404 continues to
accept and transmit the touch-tone signals until you pause at least
1 second.
Storing a DTMF Memory Sequence
You can store frequently-used touch-tone sequences in the HTX-404's nine
DTMF memories. Each memory can hold up to 15 digits. Follow these steps to
store touch-tone sequences.
1. Press and hold down F + DTMF for at least 1 second. The display
changes to show the first DTMF memory.
2. Press a digit from 1-9 to select one of the DTMF memories.
3. Enter the touch-tone sequence (up to 15 digits).
4. Press PTT to store the sequence and exit the DTMF memory store mode.
To store additional sequences, repeat the above steps.
Note: You must program DTMF memory 1 to use the auto-reply feature.
(See "Automatically Sending a DTMF Replay.")
Transmitting A DTMF memory Sequence
To send a DTMF memory sequence, press and hold down PTT. Then press D
followed by the DTMF memory number you want to transmit (1-9). The HTX-404
transmits the tones.
The HTX-404 has two DTMF memory sequence transmit speeds. To switch
between fast and slow, press and hold down PTT. Press D. Then press 0.
Note: If the auto-reply feature is turned off, you can release PTT after
you press D. Enter the DTMF memory number within 1.5 seconds.
Using DTMF Squelch for Paging
The DTMF squelch feature lets you set your HTX-404 to release the squelch
only if it receives a specific touch-tone sequence. Follow these steps to
set that touch-tone sequence.
1. Press F + D-SQL for at least 1 second.
2. Enter the sequence (up to seven digits).
3. Press PTT to save the sequence.
To turn on the DTMF squelch, press F + D-SQL for less than 1 second. DTMF
appears on the display.
Your HTX-404 remains silent until it receives the correct touch-tone
sequence. Then it beeps and returns to normal operation. To cancel DTMF
squelch, press F + D-SQL for less than 1 second so DTMF disappears from
the display.
Automatically Sending a DTMF Reply
You can set your HTX-404 to automatically transmit the touch-tone digits
stored in DTMF Memory 1 when you enable DTMF squelch and the HTX-404
receives the correct touch-tone sequence. To turn on DTMF auto-reply,
follow the steps in "Configuration Menu" to display Ar. Then rotate TUNE
select on.
You should also set this option to on if you expect an auto reply from an
auto patch, another HTX-404, or other transceiver that has this feature.
Note: You must program a DTMF sequence in DTMF Memory 1 for the auto-reply
feature to operate.
(EB 3/3/98)