SNV-12 Operations Manual
5-10
RX-Only Site: Each SVM may be configured as an RX-only site; if so, the SVM‟s
TX outputs and front panel TX LED are disabled.
RX Groups: A number of SVMs may be tied together as an RX Group for transmit-
steering purposes.
Primary Site: if a primary site is designated for an
RX Group
, the Primary Site
handles all transmissions for that group.
Duplex/Simplex Modes: Most voting systems should be set for Duplex Mode
operation. If system receivers and transmitters share the same frequency, Simplex
Mode is selected, and special provisions are added: Voting is delayed following
console transmissions to prevent voting of console TX squelch tails, and, when the
unit is in the Repeat Mode, voted audio is not retransmitted to the voted site.
5.14
Receive Only Sites
Each SVM that uses Hardwired COR or Pilot Tone COR (see Section 5.10) can be configured
as an RX-Only Site. If so configured, the SVM is not eligible for transmit by any means. The
front panel TX LED will not be lit and the SVM‟s TX outputs will not be enabled. This feature
is not available for Audio Level COR sites. The RX-Only Site feature is enabled by a
dipswitch on each SVM.
5.15
Repeat Mode
When in Repeat Mode, the voter will re-transmit voted audio via one or more SVMs.
Whenever any site is voted, the Default TX Site‟s transmit audio outputs will be enabled and
contain the receive audio from the currently voted module. There are two basic options
available for the Default TX Sites: Home Site or Multicast (see Section 5.16).
Other SNV-12 configuration options affect the SVMs that will retransmit voted audio:
Duplex Mode/Simplex Mode: When the system is set to Simplex Mode, voted audio will not be
retransmitted to the voted site. This exclusion can be overridden on a site-by-site basis by a
dipswitch (SW3-6) on each SVM module.
RX Group Selection: If the voted SVM is part of an RX Group, its audio will be retransmitted
only within its group.
Repeat Mode operation is also referred to as “Voted Site Talkthrough”.
5.15.1
Repeat Mode Transmit Hangtime
Hangtime may be used to extend the duration of the voted audio retransmission PTT
output beyond the duration of the positive COR indication input. Hangtime durations of
0 seconds, 0.5 seconds, 1 second, and 2 seconds are available. This Hangtime prevents
repeaters from unkeying during short pauses in transmissions from remote mobile and
portable radios. This is especially helpful when a lot of time is required for a
transmitter to key (for example, when the EIA keying tone sequence is used). This
Hangtime applies only to the retransmission of voted audio and does not extend console
transmissions.
Содержание SNV-12
Страница 12: ...SNV 12 Operations Manual 12 This page intentionally left blank ...
Страница 22: ......
Страница 32: ...SNV 12 Operations Manual 3 4 SNV 12 Figure 3 1 Outline Dimensions ...
Страница 75: ...SNV 12 Operations Manual 3 47 ...
Страница 113: ...SNV 12 Operations Manual 3 85 Figure 3 12 SVM 1 Remote Receiver Audio Input ...
Страница 120: ...SNV 12 Operations Manual 3 92 Figure 3 19 SVM 2 for Type I Signaling ...
Страница 121: ...SNV 12 Operations Manual 3 93 Figure 3 20 SVM 2 for Type II Signaling ...
Страница 122: ...SNV 12 Operations Manual 3 94 Figure 3 21 SVM 2 for Type III Signaling ...
Страница 123: ...SNV 12 Operations Manual 3 95 Figure 3 22 SVM 2 for Type V Signaling ...
Страница 125: ...SNV 12 Operations Manual 3 97 Figure 3 24 CIM 2 for Type II Signaling ...
Страница 126: ...SNV 12 Operations Manual 3 98 Figure 3 25 CIM 2 for Type III Signaling ...
Страница 127: ...SNV 12 Operations Manual 3 99 Figure 3 26 CIM 2 for Type V Signaling ...
Страница 130: ......
Страница 142: ...SNV 12 Operations Manual 4 12 End of Section 4 ...
Страница 145: ...SNV 12 Operations Manual 5 3 Figure 5 1 RX Audio Delay ...
Страница 172: ...SNV 12 Operations Manual 5 30 This page intentionally left blank ...
Страница 196: ...SNV 12 Operations Manual 6 24 This page intentionally left blank ...
Страница 202: ......