Calculating Upper Base Frequencies; Custom Frequency Table - Uniden UBCD396XT Owner's Manual

41. Calculating upper base frequencies

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.
The Lower Base Frequency (or Base ) is always the base frequency as provided in
the RRDB. The Upper Base Frequency is calculated from the following formulas:
For sites with a single band plan:
Base + ( (759 – Offset ) × Step )
Where:
 Base = the lower base frequency listed in RRDB.
 Offset = the offset for this entry.
 Step = the step for this entry.
For sites with multiple band plans:
= Base
Upper Base
n
Where:
 Base
is the lower base frequency for the entry.
n
 Offset
is the Offset for the next band plan (for the last table, use 760)
n+1
 Offset
is the offset for this band plan
n
 Step
is the step for this band.
n
For example:

Custom Frequency Table

Entry
A
B
C
+ ( Offset
n n+1
Base
155.4150
157.2000
157.4700
UBCD396XT
– 1 – Offset ) × Step
n
Spacing Offset
15.0
12.5
15.0
142
n
380
436
454