|
MODE. |
UPLINK. |
DOWNLINK. |
|
A |
2m |
10m |
|
B |
70cm |
2M |
|
J |
2M |
70cm |
|
K |
15M |
10M |
|
L |
24cm |
70cm |
|
S |
70cm |
13cm |
|
T |
15m |
2M |
|
JA(analogue) |
2m |
70cm |
|
JD(digital) |
2m |
70cm |
|
KT |
15m |
2m & 10m |
|
KA |
15m & 2m |
10m |
|
JL |
2m & 24cm |
70cm |
|
D |
Transponder off |
Battery charging. |
The new P3D satellite will use different designations for the ‘modes’ based on traditional RADAR (Ranging And Direction Acquisition via Radio) band designations. (See the following table).
|
V |
100-300MHz |
|
U |
300-1000MHz |
|
L |
1-2 GHz |
|
S |
2-4 GHz |
|
C |
4-8GHz |
|
X |
8-12GHz |
|
Ku |
12-18GHz |
|
K |
18-26GHz |
|
Ka |
26-40GHz |
|
mm |
40-100GHz |
With the launch of the Phase3-D satellite (AKA AMSAT Oscar 40) what used to be named mode-B with the Uplink in the UHF band and the Downlink in the VHF band has now been re- named ‘mode UV’... and the old mode-J with the Uplink in the VHF band and the Downlink in the UHF band has been altered to be called moode VU...likewise, mode S will become US (UHF/SHF).
This was to distinguish the different modes from each other because P3D was equipped with a special ‘matrix’ allowing different transponders to be connected allowing several ‘modes’ to operate at the same time. Unfortunately Phase3-D failed in orbit and is now unusable due to a failure in the main battery string.
Some of the satellites use analogue only modes, some digital and some use a combination of modes including imagery, digitalkers and bulletin board systems.