... They normally have 1 hz resolution. hp1: this is the LO for the rf to if1 mixing (1st lo) . hp2: this is used to generate the 2130 Mhz signal for the sband. 250 Mhz from downstairs gets added to this to generate 2380 Mhz which then drives the sband exciter. We own 3 of the hp32712 synths . ... To check our setup, we generated a birdie at 8446.231359 Mhz (with the hp83712 synth downstairs). ... hp83712 hp2 as sband synth . ... hp83712: downstairs, agc works, but only has KHz resolution . ...