Megger Power Diagnostix ICMflex User Manual page 77

Partial discharge and loss factor measurement system
The gating signal transmitter GST1 is depicted in Figure 101. It offers a logarithmic amplification and can be
set to three different frequency ranges (40–800 kHz, 2–20 MHz, or 200–600 MHz), which can be selected
with a push button. The active bandwidth mode is marked by a lit green LED. The gate level can be adjusted
with the rotary switch of the GST1 and is indicated by the orange LED. The level of the analogue signal incom-
ing via 'GATE IN' is indicated by the green LED bar. If it exceeds the selected gate level, the bar changes to
red. The gate level should be set to the maximum when using a TTL gating signal as signal source, only.
Output for gating signal to ICMflex
(FO TTL GATE OUT)
Input for analogue gating signal
Input for TTL gating signal
Output for TTL gating signal
(e.g., to ICMsystem or ICMcompact)
9 V power supply
Figure 102: Disjunction of gating signals when simultaneously using analogue and TTL gating
pdix.com
Figure 101: Gating signal transmitter (GST1)
LED scale indicating the level of the
incoming analogue gating signal
and the selected gate level
Button for bandwidth selection and
for switching on/off
Rotary switch for gate level adjustment
ICMflex
User guide for ICMflex
77