# Uniden Band Plan Entry

Custom Band Plans (800 Custom, VHF, UHF) require that you enter both a lower and an upper base frequency value. 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 the 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