Connecting 6700 to oscilloscope

For experimentation, one can simply make an inductive coupling loop by wrapping a half-dozen turns of an alligator test lead around a coaxial transmission line.  A BNC-to-banana adapter works well for this application.  Within limits, the level can be adjusted into the scope or spectrum analyzer (S/A) by adding or subtracting turns.  I normally use commercial Bird and Narda couplers, but in a pinch, I'll just do the above.

I wouldn't dismiss the value of a scope when it comes to making RF measurements.  There are some neat things you can do in the time domain that can't be done in the frequency domain.  A scope is also essential when trying to ensure proper system timing.  For example, I often use a 4-channel scope to monitor the CW key line, RF output after the rig, RF output after the amp, and receive audio coupled to the last channel.  That kind of testing can't be done with a S/A.

There are some exceptionally good values on used test equipment.  With some due diligence, one can find Tektronix and HP gear that won't break the bank. 

Anyone interested in a new digital storage oscilloscope (DSO) should carefully evaluate competing models.  I strongly recommend that any new DSO have variable intensity gradient shading.  This is a trick that some DSO manufacturers use to mimic the effect of a phosphor display.  The Rigol Z series are such DSOs.  If you're making complex measurements (e.g., an AM waveform), you'll want to see variable brightness along the trace.  Common DSOs use one intensity.  My first DSO experience was kinda' disappointing - until I purchased a variable gradient model.  As accurate and maintenance-free as the high end DSOs are, none of them look as good as an analog phosphor display.  That will probably get better over time.

Paul, W9AC