Textron Greenlee Communications DataScout 10G User Manual page 71

decrease in amplitude. Phase hits (Figure 5-3) are sudden signal phase changes (out
& back) lasting longer than 4ms.
To start a Dropout, Gain & Phase test:
1. Check for valid Receive (RX) holding tone frequency and Level
2. Adjust the Gain Hits threshold using the pull down menu located by Hits count
2, 3, 4(default), 6, 8, or 10. This threshold is only used for Gain hits not Drop-
outs. Adjust the Phase hits threshold (use pull down menu) from 5-45 degrees
in 5 degree steps.
3. Tap on the Dropouts, Gain & Phase hits button located under the 4-wire button,
the green indicator tells the user that the Dropout & Hits reference amplitude
has been taken and the D&G counters have been cleared along with Elapsed
Time.
If the amplitude decreases by 12dB (greater than 4ms) from the reference level a
Dropout will be counted (maximum of 1 per second). If an increase or decrease in lev-
el exceeds the Gain hits threshold pull down (4dB default) then a Gain hit will be
counted (max 8 per second). If a phase hits exceeds the threshold then the phase
counter will increment.
Figure 5-1
Figure 5-2
Figure 5-3
Users Manual
DataScout 10G & 10Gx
69