EPSILON CLOCK MODEL EC20S Spectracom
69 User’s Manual
70. ALARM PHASE THRESHOLD
Threshold for the Phase Accuracy, used during a holdover period, to determine whether the
1PPS signals are still valid (the estimated phase accuracy is below the threshold) or not (the
estimated phase accuracy is above the threshold). See 13.3.2.2. Unity: nanosecond.
Range=[0, 100000]. Default is 10.
Specific value: If the field is zeroed: No alarm is generated – The Threshold
function is disabled and the OID ec20S-STA-PHASE-ERROR (MIB
VARIABLE) remains set to 1.
71. ALARM FREQUENCY THRESHOLD
Threshold for the Frequency Accuracy, used during a holdover period, to determine
whether the 10MHz signals are still valid (the estimated frequency accuracy is below the
threshold) or not (the estimated frequency accuracy is above the threshold). See 13.3.2.2.
Unity: None (∆f/f * 10
-9
). Range=[0, 1000] * 10
-9
. Default is 1000 * 10
-9
.
Specific value: If the field is zeroed: Frequency alarm is immediately generated
(meaning that synchronization is lost). The OID ec20S-STA-
FREQ-ERROR (MIB VARIABLE) remains set to 0.
13.7.4 DISTRIBUTION SETUP
72. MUTE MODE FOR 1PPS
The mute mode for the output 1PPS signals:
- Disabled Output 1PPS signals are always distributed whatever their
quality is.
- Automatic Output 1PPS signals are muted upon SFN conditions when SFN
Status is ‘Off’ (see 10.2).
- On Time Output 1PPS signals are muted upon time conditions (see
13.7.5).
- Until Stable Output 1PPS signals are muted until they are stable (i.e. after
their frequency have been adjusted a first time).
- Until 1
st
Sync Output 1PPS signals are muted until the EC20S meets the SFN
conditions. Once the EC20S have met the SFN conditions for the
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