Mae'r cynnwys hwn ar gael yn Saesneg yn unig.

OB Talkback

06 Chwefror 2015

Outside broadcast frequencies are intended for short term use at any location.

The frequencies available for PMSE use are listed here. Any multi-channel equipment should preferably contain channels from all 3 bands.

If you intend to use several channels at a location please select from the intermodulation free groups when applying.

Standard powers are 5W ERP for base and 1W ERP for portable.

457 / 467 MHz

Base Transmit Portable Transmit Intermod Group
457.25625 467.30625 C
457.26875 467.31875 A
457.28125 467.29375 B
457.29375 467.40625 D
457.30625 467.36875 A
457.31875 467.48125 E
457.33125 467.44375 A
457.34375 467.38125 D
457.35625 467.33125 B
457.36875 467.35625 E
457.38125 467.45625 B
457.39375 467.39375 C
457.40625 467.34375 E
457.41875 467.49375 D
457.43125 467.46875 C
457.44375 467.53125 A
457.45625 467.51875 C
457.46875 467.50625 B

Each of the Groups A, B and C contain 4 pairs which are intermodulation free.

Group A Group B
Base Transmit Portable Transmit Base Transmit Portable Transmit
457.26875 467.31875 457.28125 467.29375
457.30625 467.36875 457.35625 467.33125
457.33125 467.44375 457.38125 467.45625
457.44375 467.53125 457.46875 467.50625

 

Group C
Base Transmit Portable Transmit
457.25625 467.30625
457.39375 467.39375
457.43125 467.46875
457.45625 467.51875

Groups D and E contain 3 pairs which are intermodulation free:

Group D Group E
Base Transmit Portable Transmit Base Transmit Portable Transmit
457.29375 467.40625 457.31875 467.48125
457.34375 467.38125 457.36875 467.35625
457.41875 467.49375 457.40625 467.34375

 

455 / 468 MHz

Base Transmit Portable Transmit Notes
454.99375 468.36875 AOR London Only
455.00625 468.38125 AOR
455.01875 468.04375 AOR London Only
455.03125 468.05625 AOR
455.09375 468.39375 AOR
455.10625 468.40625 News
455.11875 468.41875 News
455.13125 468.43125 AOR
455.19375 468.01875 AOR
455.20625 468.03125 AOR London Only
455.21875 468.49375 AOR
455.23125 468.50625 AOR
455.24375 468.16875 News
455.25625 468.19375 AOR
455.26875 468.18125 News
455.28125 468.29375 AOR
455.39375 468.33125 AOR
455.40625 468.20625 News
455.41875 468.30625 AOR
455.43125 468.31875 News
455.44375 News
455.45625 468.55625 News
461.23750 468.52500 AOR
461.25000 468.53750 AOR

AOR = Assign on request
News = Not available

Each of the Groups contains pairs which are intermodulation free.

Group A Group B
Base Transmit Portable Transmit Base Transmit Portable Transmit
455.00625 468.38125 455.21875 468.49375
455.03125 468.05625 455.28125 468.29375
455.19375 468.01875 455.39375 468.33125
455.23125 468.50625

 

Group C Group D (London Only)
Base Transmit Portable Transmit Base Transmit Portable Transmit
455.25625 468.19375 454.99375 468.36875
455.28125 468.29375 455.01875 468.04375
455.39375 468.33125 455.20625 468.03125

 

Group E Group F
Base Transmit Portable Transmit Base Transmit Portable Transmit
455.00625 468.38125 455.09375 468.39375
455.13125 468.43125 455.19375 468.01875
455.39375 468.33125 455.23125 468.50625
455.41875 468.30625

 

Group G Group T
Base Transmit Portable Transmit Base Transmit Portable Transmit
455.03125 468.05625 455.00625 468.38125
455.21875 468.49375 455.03125 468.05625
455.25625 468.19375 455.21875 468.49375
455.28125 468.29375 455.25625 468.19375

 

446 / 467 MHz

The frequencies in the table are not paired. See below for intermod free pairs.

Base Transmit Portable Transmit
446.43125 467.75625
446.44375 467.76875
446.45625 467.78125
446.46875 467.79375
446.48125 467.80625
446.49375 467.81875
446.50625 467.83125
446.51875 467.84375
446.53125 467.85625
446.54375 467.86875
446.55625 467.88125
446.56875 467.89375
446.58125 467.90625
446.59375 467.91875
446.60625 467.93125
446.61875 467.94375
446.63125 467.95625
446.64375 467.96875
446.65625 467.98125
446.68125 467.99375

 

Each of the Groups contains pairs which are intermodulation free.

Group A Group B
Base Transmit Portable Transmit Base Transmit Portable Transmit
446.45625 467.78125 446.43125 467.75625
446.50625 467.83125 446.45625 467.78125
446.58125 467.90625 446.49375 467.81875
446.60625 467.93125 446.56875 467.89375
446.78125 467.86875 446.78125 467.86875
446.89375 467.95625 446.88125 467.98125

 

447 MHz Simplex

The 447 MHz channels can be used for simplex base transmit.

Base Transmit
447.01875 447.41875
447.03125 447.43125
447.04375 447.44375
447.05625 447.45625
447.36875 447.46875
447.38125 447.48125
447.39375 447.49375
447.40625 447.50625