Modes

Satellite Modes

Historically OSCAR uplink (transmit to) and downlink (receive from) frequencies were designated using single letter codes.

  • Mode A: 2 m uplink / 10 m downlink
  • Mode B: 70 cm uplink / 2 m downlink
  • Mode J: 2 m uplink / 70 cm downlink

New uplink and downlink designations use sets of paired letters following the structure X/Y where X is the uplink band and Y is the downlink band.

Designator
H
A
V
U
L
S
S2
C
X
K
R
Band 15 m 10 m 2 m 70 cm 23 cm 13 cm 9 cm 5 cm 3 cm 1.2 cm 6 mm
Frequency
(General)
21 MHz 29 MHz 145 MHz 435 MHz 1.2 GHz 2.4 GHz 3.4 GHz 5 GHz 10 GHz 24 GHz 47 GHz

Here is a table with old and new mode summary

Mode (old) Mode (new) Uplink Downlink
K 21 MHz 29 MHz
T 21 MHz 145 MHz
A 145 MHz 29 MHz
J VU 145 MHz 435 MHz
B UV 435 MHz 145 MHz
S US 435 MHz 2400 MHz
L LU 1268 MHz 435 MHz
LS 1268 MHz 2400 MHz
LX 1268 MHZ 10450 MHz
VS 145 MHz 2400 MHz