FOR IMMEDIATE RELEASE                                       Number 95-01
                                                            January 8, 1995
 
                FINAL FREQUENCIES SELECTED FOR PHASE 3-D
 
 
    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 by the
 satellite, scheduled to be launched in April, 1996.  These selections have
 since been approved by the P3-D 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 P3-D 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 3-D 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 3-D 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     5668.300 - 5668.550        5668.550 - 5668.800       5668.675
 
 
 
DOWNLINKS:
 
 BAND        DIGITAL (MHz)             ANALOG (MHz)         CENTER (MHz)
  10m      29.330 (+/- 5 KHz)     (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(MHz)     Beacon-2 (MHz)
 
 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 2 meter beacon is due strictly to characteristics
 of the IF Matrix and the limited bandwidth available on that band.  Studies
 are underway with the intent of providing a 2 meter beacon, but it is not
 clear at this time whether 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 news release.
 
 
For More Information Contact:
 
Keith Baker, KB1SF
 "KB1SF@AMSAT.ORG"