Applications For 34 Mbit/S Signals; Monitoring 34 Mb/S, Full Check (Approx. 25 Min - Wavetek ANT-20 Operating Manual

ANT-20SE
4

Applications for 34 Mbit/s signals

Most of the applications described in the following sections are also available as "quick check"
versions.
4.1

Monitoring 34 Mb/s, full check (approx. 25 min)

Monitoring an unknown 34 Mbit/s signal
Fig. SA-3
Connecting the item under test
The coaxial socket of the item under test is connected to input [12] of the receiver for the
"Monitoring 34 Mb/s, full check (approx. 25 min)" application.
Measurement
The application automatically detects the correct impedance and receive level (ITU-T or PMP)
and starts the line type test. This determines the type of signal present at the receiver input:
• Framed
• Unframed
• AIS_34M
• Unknown (if none of the above signal types could be clearly determined, e.g. because a
different bit rate was present)
The clock frequency deviation of the incoming signal is measured. The measured value will be
displayed if it is more than ±2 ppm.
If widely differing values are measured during three consecutive measurements, the diagnosis
"Clock variable" is given. A diagnosis of "Clock variable" is an indication of synchronization
problems. It may also indicate that a signal with a different bit rate or with a line code that does
not correspond to HDB3 is present.
Standard Applications
Monitoring an unknown 34 Mbit/s signal
ANT-20 NEXT
SA-13