Looking for a Service Monitor.
Brand is not important but functions are.
AM/FM RF generator 500KHz to 1Ghz
Spectrum Analyzer with Tracking generator
Signaling encoder/decoder (CTCSS & DCS)
Frequency Error Meter
Full Duplex operation
Graphic export or Software controllable (not a real big deal but would be nice)
I have a IFR Aeroflex 1500 now so something close but newer.