I do have a working scope sitting on my bench.
![](https://obrazki.elektroda.pl/9498350500_1511225516.jpg)
Only the multimeter is not working correctly.
They are fully independent from each other. Cannot be used at the same time.
5MHz,single channel,XY mode,external trigger.
There's a few months warranty available(depends on seller) for most of these used scopes.
Managed to find more information on SCHLUMBERGER 5228.
I found a blog of some RF guy who was able to go above 500MHz on it.
5 V/div - 10 mV/div - 250 MHz - 1,4 ns
5 mV/div - 200 MHz - 1,75 ns
2 mV/div - 100 MHz - 3,5 ns
10mV will be fine for the bandwidth.
I have looked into the schematic.
All parts are TTL/CMOS parts(Worst is 82S129,TTL PROM) or analogs(worst beeing high frequency opamps).
No "special" parts.
Even PCB layouts are given.
For now I'm just planning FM band operation as I need to adjust few vintage superheterodyne radio receivers.
One was originally running on OIRT band and there are some problems in lower CCIR band.
The new scope will also help with the repair of my current scope multimeter.
Will be used as backup tool.
I guess I will go for this one.
I was somewhat leaning for DSO but then I saw the bugs which happen on low-end DSO.
Mostly waveforms "locking up" on some models.
There are bugs which happened on DSO's 10 years ago and somehow got copied to new models which are selling today.