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preset number. The ship maritime preset number is changed by touching the desired number(s) on the
keypad options (numbers 1 thru 28 or 60 thru 88), verifying the new number in the scratchpad, and
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touching ENT. If an invalid number is entered, ERROR is displayed in the scratchpad. CPHR
(cipher), SQCH (squelch), GRCV (guard receive), and ADF (automatic direction finder) are enabled or
disabled by touching the respective touch options/displays. An enabled option has a highlighted
border. CPHR or ADF operation is available for only one radio at a time. Enabling CPHR or ADF on
COMM 1 automatically disables CPHR or ADF on COMM 2 if previously enabled.
Enabling ADF automatically disables SQCH. SQCH may be enabled after selecting ADF by
touching the SQCH option; however, if SQCH was not enabled after selecting ADF it is automatically
enabled when ADF is disabled.
The modulation type (AM or FM), AJ, or AJ MENU options are not available on this sublevel.
23.2.2.4 COMM Sublevel - Guard and Cue Presets. The Guard or Cue Preset COMM Sublevel is
selected by touching the COMM 1 touch option/display with CH G or CH C previously selected (see
figure 23-3). This sublevel is used to change the G (guard) or C (cue) frequency, to enable or disable
squelch, cipher mode, guard receive, ADF operation, or to select modulation type (AM or FM).
Selecting this sublevel displays a 1: (selected radio) followed by a G or C and the current fixed
frequency. The fixed frequency is changed by touching the desired numbers on the keypad options,
verifying the new number in the scratchpad, and touching ENT.
Valid frequencies are:
1. 30 thru 87.995 MHz (FM) - at increments of .005, .025 MHz for C
2. 108 thru 135.995 MHz (AM) - at increments of .005, .025 MHz for C
3. 136 thru 155.995 MHz (AM/FM) - at increments of .005, .025 MHz for C
4. 156 thru 173.995 MHz (FM) - at increments of .005, .025 MHz for C
5. 225 thru 399.975 MHz (AM/FM) - at increments of .025 MHz.
If an invalid number is entered, ERROR is displayed in the scratchpad.
Figure 23-2. COMM Sublevel - Ship Maritime Preset
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SQCH (squelch), GRCV (guard receive), AM/FM, and ADF (automatic direction finder) are enabled
or disabled by touching the respective touch options/displays. An enabled option has a highlighted
border. The AM/FM option is always border highlighted and toggles between AM and FM. If the
current frequency is available only in AM or FM, the AM/FM option is not displayed. While in the
UHF AM mode, the cipher option cycles as follows: CPHR (no highlighted border-cipher disabled),
CPHR (border highlighted-cipher baseband enabled), CPDP (border highlighted-cipher diphase
enabled). The CPHR and CPDP options are mutually exclusive. Continued selection of this option
repeats the above cycle. CPHR (both diphase and baseband) or ADF operation is available for only one
radio at a time. Enabling CPHR or ADF on COMM 1 automatically disables CPHR or ADF on COMM
2 if previously enabled.
Enabling ADF automatically disables SQCH. SQCH may be enabled after selecting ADF by
touching the SQCH option; however, if SQCH was not enabled after selecting ADF it is automatically
enabled when ADF is disabled.
The AJ and AJ MENU options are not available on this sublevel.
23.2.2.5 COMM Sublevel - Manual Preset. The Manual Preset COMM Sublevel is selected by
touching the COMM 1 touch option/display with CH M previously selected (see figure 23-4). This
sublevel is used to change the M (manual) frequency, to enable or disable squelch, cipher mode, guard
receive, ADF operation, select modulation type (AM or FM) or to access Have Quick, Have Quick time,
SINCGARS coldstart, Have Quick manual data fill, and SINCGARS zeroize. Selecting this sublevel
displays a 1: (selected radio) followed by an M and the current fixed frequency. The fixed frequency
is changed by touching the desired numbers on the keypad options, verifying the new number in the
scratchpad, and touching ENT.
Valid frequencies are:
1. 30 thru 87.995 MHz (FM) - at increments of .005 MHz,
2. 108 thru 135.995 MHz (AM) - at increments of .005 MHz,
Figure 23-3. COMM Sublevel - Guard and Cue Presets
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3. 136 thru 155.995 MHz (AM/FM) - at increments of .005 MHz,
4. 156 thru 173.995 MHz (FM) - at increments of .005 MHz,
5. 225 thru 399.975 MHz (AM/FM) - at increments of .025 MHz.
If an invalid number is entered, ERROR is displayed in the scratchpad.
SQCH (squelch), GRCV (guard receive), and ADF (automatic direction finder) are enabled or
disabled by touching the respective touch options/displays. An enabled option has a highlighted
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本文链接地址：
NATOPS Flight Manual 飞行手册 2(76)
