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Installation
TB9400/TN9275 Installation and Operation
© Tait International Limited May 2023
Non simulcast sites can use an external timing reference (as per simulcast
operation) or exchange timing signals between transceivers (internal
timing)
Channel Group
Multicast
Channel group non-simulcast operation requires the following
synchronization inputs:
Channel Group
Simulcast
Simulcast operation requires frequency reference input, 1PPS and NTP
derived from GNSS.
4.5.3
Equipment Required
It is beyond the scope of this manual to list everything required. However,
the following tools and equipment are specifically required for installing
the base station:
Timing Type
Frequency
Reference Input
1PPS
NTP
External
Required
Required
Required
a
a. External timing requirements for Phase 2 non-simulcast operation are
equivalent to simulcast.
Internal - control
channel
Not required
Output from control
channel
Not required
b
b. Even though NTP is not required for transmission synchronization, it is
recommended for aligning log timestamps.
Internal - traffic
channel
Not required
Input from control
channel
Not required
c
c. All transceivers at the site must use the same timing source; either an ex-
ternal timing unit or one that is internally derived between channels at the
site.
Channel Type
Frequency
Reference Input
1PPS
NTP
DMR conventional
voted
Not required
Required
Required
a
a. 1PPS and NTP must be GNSS sourced (coherent).
Simulcast Channel Type
Frequency
Reference Input
1PPS
NTP
AS-IP analog
a
a. Applies to TB7300 / TB9400 / TN9275 gateway.
Required
Required
Required
P25 Ph1 / Ph2 / conventional /
trunked
1
Required
Required
Required
DMR conventional / trunked
Required
Required
Required
