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5.6. IF BANDWIDTH SELECTION
The appropriate IF bandwidth may to be set manually for each analog demodulation mode.
However for digital modes, the IF bandwidth is automatically selected and cannot be changed.
After the desired analog mode has been set, access the IF
bandwidth menu as follows:
1. Long press [MODE] and use [] to select [IFBW], followed
by [ENT].
2. Use the arrows [] or [] to select the desired bandwidth
and then press [ENT] to validate the setting.
(Greyed out values cannot be selected.)
User selectable bandwidths for each of the analog modes:
FM 6, 15, 30, 100 kHz
AM 3.8, 5.5, 8, 15 kHz
USB 1.8, 2.6 kHz
LSB 1.8, 2.6 kHz
CW 200, 500 Hz
5.7. SQUELCH
The squelch function quiets the background “white” radio noise, when no signal is present. It
operates in analog modes (FM, AM, USB, LSB, CW) and the digital auto-mode (AUT1). It
has no effect for the individual digital modes (DSTR, YAES, DMR, D-CR(NXDN), dPMR, ALIN,
P-25, T-DM) as the receiver only lets audio pass through when a digital signal is detected.
The squelch can be manually “opened” and allow signals to be heard, or “closed” to mute the
audio of the signal.
When the squelch is “open”, the indicator (for busy) appears on the left side of the LCD.
When doing a memory SCAN or SEARCH, the squelch setting is very important as it serves
as a receiver signal threshold to determine whether or not a signal is present, and when to
resume scanning.
Squelch type and threshold value example
Above example shows
selectable bandwidths
for AM mode.
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