TB 11-6625 -3263-25
Upper frequency limit of the AN/UPM-84A is 63 GHz. Upper frequency
limit of the AN/USM -489 is 40 GHz with mixers supplied (to 220 GHz
with additional Tektronix mixers). If a unit is authorized an AN/UPM -84A
and does not require a frequency range above 40 GHz then the
AN/USM-489 can replace the AN/UPM -84A.
Subject item is a plug in unit used with Tektronix 7000 series
mainframes. If the 7000 series mainframe is used only with the PL-
1392/U, then the mainframe shall be removed from the field with the PL-
1392/U. If the mainframe is used with other plug -ins, then the unit shall
retain the mainframe but still remove the PL-1392/U from the field.
The AN/USM-489(V)1 can replace the IP -1216(P)/GR when used with
the plug -in configurations listed below and when the SG -1125/U is not
required to be used in conjunction with the PL-1406/U. Configurations
replaceable by AN/USM -489(V)1:
Plug-in IF section removed from the field only when unit does not have
the PL-1387/U or the PL-1399/U.
Item is a plug -in module that is functional only when used with a