Uniden Band Plan Entry

Custom Band Plans for VHF and UHF analog or mixed mode trunk systems require that you enter both a lower and an upper base frequency value (P25 systems do not require a bandplan, as that information is carried on the control channel). Here's how to determine these values.

For sites with a single band plan:

Lower Base Frequency: Base Frequency as provided in the RRDB Upper Base Frequency: Lower Freq + (759-Offset) *step

For sites with multiple band plans, you need to calculate the upper base frequency for each entry.

Upper Base_n = Base_n + (Offset_n+1 - 1 - Offset_n)*Step_n Where:

• Base_n is the lower base frequency for this entry.
• Offset_n+1 is the Offset for the next band plan (for the last table, use 760)
• Offset_n is the offset for this band plan
• Step_n is the step for this band.

For example: Custom Frequency Table

Base	Spacing	Offset
155.4150	15.0	380
157.2000	12.5	436
157.4700	15.0	454

Lower Base 1 = 155.415 MHz

Upper Base 1 = 155.415 MHz + (436 - 1 - 380) * 15kHz

Upper Base 1 = 155.415 MHz + 55 * 15kHz

Upper Base 1 = 155.415 MHz + 0.825 MHz = 156.240 MHz

Lower Base 2 = 157.200 MHz

Upper Base 2 = 157.200 MHz + (454 - 1 - 436) * 12.5 kHz

Upper Base 2 = 157.200 MHz + 17 * 12.5 kHz = 157.4125 MHz

Lower Base 3 = 157.470 MHz

Upper Base 3 = 157.470 MHz + (759 - 454) * 15 kHz

Upper Base 3 = 157.470 MHz + 305 * 15 kHz = 162.045 MHz