Uniden UBC780XLT manual Receiving Trunked Systems, Trunked Search

Setting the Squelch

For trunked reception, a good setting for the SQUELCH control is in the centre of the range with the red marker pointing up. See the illustration.

If set too high (CCW) in some cases it could prevent your scanner from locking to the control channel reliably. If set too low (CW) it will slightly delay finding the control channel. The best setting is the same as for conventional reception, and is not critical.

Receiving Trunked Systems

When you have properly programmed all the frequencies for a trunked system, you can receive the system several different ways. You will find that Search, Hold, Lockout, Scan and Manual are all similar to conventional scanning.

❖TRUNKED SEARCH lets you hear all system talkgroup activity (unit-to-unit I-Calls may be received as well). This is the best way to get started.

❖ID HOLD works with Search mode to let you quickly freeze reception on an interesting transmission. Or you can manually specify a talkgroup with DIRECT ENTRY ID HOLD.

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ID LOCKOUT works with Search to exclude talkgroups that you don't want to hear.

ID SCAN lets you receive only those talkgroups that you store in Scan Lists.

MANUAL lets to selectively listen to a talkgroup in your Scan Lists

When receiving EDACS systems, remember that Uniden's AFS talkgroups give you powerful flexibility. In a few keystrokes, you can specify a single talkgroup, a fleet, or an entire agency in all the above modes. Read the section "EDACS Reception" to understand how this works.

Trunked Search

Once you have programmed all the frequencies for a trunked system, SEARCH will let you immediately start hearing transmissions. It is suggested you try SEARCH mode first.

1.Press SCAN, and select the bank(s) you wish to receive, just as you select banks in conventional scanning.

2.Press TRUNK to enable trunked reception. The radio will seek and acquire the trunked system control channel. The scanner will now be in MONITOR mode. You will hear the control channel and see active talkgroups on the screen. You will not hear the voice transmissions in MONITOR mode.

☞Hint: MONITOR mode is an excellent way to observe system activity and determine which talkgroups are most active. Locked-out IDs display during MONITOR mode.

3.Press SRCH to begin searching and receiving. You will hear talkgroups and see them on the screen.

Talkgroups display differently in Motorola, EDACS and LTR systems. You should read the appropriate parts of this guide to understand the formats.

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