The Tektronix 7A24 is a 400 MHz dual-channel vertical plug-in for 7000-series scopes with (fused) 50 Ω BNC inputs. It is the fastest multi-channel plug-in available for the 7000 series. Unlike most other plug-ins, it does not offer AC input coupling.
A single-channel version was planned as the 7A25 but did not make it into production.
|Bandwidth||400 MHz (71xx) / 350 MHz (79xx) / 300 MHz (78xx)|
|Deflection||5 mV/Div to 1 V/Div (1–2–5), variable ×2.5 (up to 2.5 V/Div)|
|Input impedance||50 Ω|
|Maximum input||5 V (0.5 W) − no damage below 10 V (2 W)|
|Timing||Delay difference between channels < 200 ps|
The 7A24's input attenuators are similar to that in the 7A19, using replaceable ceramic attenuator modules held to the switching PCB using steel springs.
The amplifier is built using the Tek-made differential amplifier 155-0078-xx (four units per channel in early, five in late versions; various grades). In the 5 mV/Div range only, the amplifier gain is doubled electronically. The signal trace layout on the PCB is designed to provide T-coil peaking.
The 7A24 does not use the ±50 V supplies provided by the mainframe.
Cartoon in schematic: Signal Out