16-09-2020, 09:02 AM
Hi.
If you modulate 405 onto a UHF modulator and depress the buttons on the 9 90 the resultant 405 line picture is good.
The 9-90 on VHF has poor LF response but is still capable of around 2.7mhz bandwidth. The issue on VHF can be put right as its down to mostly electrolytic caps but the job is very fiddly.
On UHF they will resolve 5mhz. So when hit with 405 on UHF and you just switch the time base resolution is very good indeed.
If you modulate 405 onto a UHF modulator and depress the buttons on the 9 90 the resultant 405 line picture is good.
The 9-90 on VHF has poor LF response but is still capable of around 2.7mhz bandwidth. The issue on VHF can be put right as its down to mostly electrolytic caps but the job is very fiddly.
On UHF they will resolve 5mhz. So when hit with 405 on UHF and you just switch the time base resolution is very good indeed.
