Hi,
The P7380 Series are compatible with the TDS7000B Series. Not all functions are supported. For this you must have a TDS6000(B/C) Instrument.
Source: Tektronix Product Catalog 2005 (the last big one?) page 130. I don't know if the P7380 Series are compatible with the TDS7000 Non-B Series. In addition, maybe you must install Tek Connect Adjust Software V1.1 (2002). This supports P7260 Probes.
Greetings and succes,
Calibrationfixture