50 Keysight M8000 Series of BER Test Solutions Installation Guide
2 Installing Modules
 
To Connect the M8057A/B Remote Head
The M8057A/B remote head is connected to each channel of M8045A 
module. Connect the M8057A/B to the M8045A remote head controls  
(P and N) as shown in the Figure 35 on page -50.
Figure 35 Installing M8045A, M8046A modules and M8057A/B remote head
Ensure that the chassis is NOT powered up or connected to a power 
source while making connections to M8057A/B. 
Also, make sure NOT to remove the M8057A/B connections when it is 
powered on. However, if you wish to remove the M8057A/B connections, 
ensure that the instrument is powered off.