(8) Radio Link Carri.r System between Receiver Station and Facilities Control, This system used AN/TRC-24 radio equipment, range at about 350 megacycles. operattig in the high end of the llC1t Carrier equipment was AN/TCC-7, with AN/FCC-3 superimposed for teletype channels. No difficulty was experienced in securing satisfactory operation; however, is it believed that a fixed-plant type microwave installation would have been preferable. Three features of the AN/FRC-23 Microwave Equipment would lmve been valuable in this application, as follows: ~ Twenty-four channel capacity. At the peak of this operation more than twelve channels were required, necessitating the use of two AN/TRC-24 and AN/TCC-7.systems. ~ Automatic transfer to spare equipment in the event of failure. iklthoughfew failures were experienced with the AN/!rRc-24equipment, the failures which did occur resulted in outages while spare equipment was put in service, often at extremely inconvenient tines. Q Broadtmd channel capability. Because the chan~ nels of the AN/TCC-7 will not pass the 6QO0 cycle band of the single sideband channel group, channel restoring equipment (CF-1 carrier terminals) was required at the receiver site. This complicated the system line-up procedure. If 6000 cycle channels had been available, the CF-1 at the Facilities Control terminal could have performed both the shifting and restoring functions, thus saving equipment and eliminating a potential source of trouble, 80 r