X-Stream Operator’s Manual 
WM-OM-E Rev I  83 
AP-1M Hi-Z Adapter 
 
The AP-1M adapter provides a means to connect a high-impedance input to your instrument. In 
order to achieve high bandwidth with excellent signal integrity, these instruments have a +/-4 V 
dynamic range and 50  termination to ground. However, for applications that combine one or more 
high-speed signals with slower, higher-voltage signals, the AP-1M provides a 1 M input impedance 
path and a full-scale range of +/-8 V. It is also suitable as an interface for current probes that require 
a 1 M input path.  
In addition to acting as a  ProLink-to-ProBus adapter, the AP-1M also enables a much larger offset 
voltage range (up to +/-50 V). 
The AP-1M is supplied with a PP005A passive probe. 
Auxiliary Output Signals 
In addition to a calibration signal, the following signals can be output through the AUX OUTPUT 
connector: 
 
Square Wave 
 
Trigger Out -- can be used to trigger another scope 
 
DC level -- a reference level