HP8590 series reference in/out

[Miti]

I have a question about the reference in/out of the HP8590 series spectrum analysers. Can I split the 10MHz using a simple T adapter? I want to use it for an external tracking generator. By my measurements, the input is not 50 Ohm anyway and the frequency is low enough. What do you think?

[ps]

In the counterlock assemby (A25) the reference signal is AC coupled (47 nF) and clamped to 0.6 V before driving the OSCIN input of a MC145146 PLL. Reference Output is driven by a NE5212 RF OpAmp, also AC coupled (10 nF). So I assume there will be enough power available to drive a second input, and there is definitely no 50 Ohm matching present.

[Miti]

In the counterlock assemby (A25) the reference signal is AC coupled (47 nF) and clamped to 0.6 V before driving the OSCIN input of a MC145146 PLL. Reference Output is driven by a NE5212 RF OpAmp, also AC coupled (10 nF). So I assume there will be enough power available to drive a second input, and there is definitely no 50 Ohm matching present.

Good info, thanks ps! I will use it as reference to an AD4350.