From listmaint@AMSAT.Org Sun Jan  8 09:59 PST 1995
To: ans@amsat.org

SB SAT @ AMSAT   $ANS-008.01
FINAL FREQUENCIES SELECTED FOR PHASE 3-D

HR AMSAT NEWS SERVICE BULLETIN 008.01 FROM AMSAT HQ
SILVER SPRING, MD JANUARY 8, 1995
TO ALL RADIO AMATEURS BT
BID: $ANS-008.01

Following a series of discussions, a number of iterations and intensive
study, the builders of the Phase 3-D communications equipment have made
their final selections of the frequencies to be employed on the satellite
scheduled to be launched in April 1996.  These selections have since been
approved by the P3D Project Leader Dr. Karl Meinzer (DJ4ZC).

These frequencies were carefully selected to minimize mutual interference
with other amateur satellites and have been coordinated with IARU bandplans
by the P3D Frequency Coordinator, Freddy de Guchteneire (ON6UG) with
assistance from Peter Guelzow (DB2OS) and Werner Haas (DJ5KQ).

Crystals have been ordered for all receivers and transmitters to implement
these frequencies.  In accordance with the Phase 3D design concept, all
receivers and transmitters are connected to the IF matrix which allows
interconnection of the various receivers and transmitters to create what
have been known as transponders on former amateur satellites.

The selected Phase 3D frequencies are as follows:

UPLINKS

  BAND        DIGITAL (MHZ)              ANALOG (MHZ)          CENTER (MHz)
 ------       -------------              ------------          ------------
 15M              N/A                  21.210 -   21.250           21.230
 2M        145.800 -  145.840         145.840 -  145.990          145.915
 70CM      435.300 -  435.550         435.550 -  435.800          435.675
 23CM(1)  1269.000 - 1269.250        1269.250 - 1269.500         1269.375
 23CM(2)  1268.075 - 1268.325        1268.325 - 1268.575         1268.450
 13CM(1)  2400.100 - 2400.350        2400.350 - 2400.600         2400.475
 13CM(2)  2446.200 - 2446.450        2446.450 - 2446.700         2446.575
  6CM     5668.350 - 5668.550        5668.550 - 5668.800         5668.675


DOWNLINKS

 BAND         DIGITAL (MHz)            ANALOG (MHz)            CENTER (MHz)
 ----         ------------             ------------            ------------
 10M        29.330 MHz +/-5 KHz  (To be used for digitized voice bulletins)
  2M        145.955 -  145.990       145.805 -  145.955          145.880
 70CM       435.900 -  436.200       435.475 -  435.725          435.600
 13CM      2400.650 - 2400.950      2400.225 - 2400.475         2400.350
  3CM     10451.450 -10451.750     10451.025 -10451.275        10451.150
 1.5CM    24048.450 -24048.750     24048.025 -24048.275        24048.150

All downlink passbands are inverted from the uplink passbands.

BEACONS:

  BAND       Beacon-1       Beacon-2
  -----      --------       --------
  2M           N/A             N/A
 70CM        435.450        435.850
 13CM       2400.200       2400.600
  3CM      10451.000      10451.400
 1.5CM     24048.000      24048.400

Note: The absence of a 2M beacon is due to strictly to characteristics of
the IF matrix and the limited bandwidth available on that band.  Studies
are underway with the intent of providing a 2M beacon but it is not clear,
at this time, that this effort will be successful.  The beacons on the other
bands are for various purposes including providing spacecraft engineering
data to the command stations.  All beacons can be modulated with 400 bits
per second BPSK and possibly other formats.

[The AMSAT News Service wishes to thank Phase 3-D International Satellite
 Team members Freddy de Guchteneire (ON6UG), Peter Guelzow (DB2OS), Werner
 Haas (DJ5KQ) and Karl Meinzer (DJ4ZC) for the information that went into this
 bulletin.]