Clock Source:
Internal, External, Rx, or Offset.
Internal clock:
The clock for the transmitter is derived from the internal clock. The internal clock has an accuracy of
+/- 3.5ppm conforming to G.812 recommendations.
External clock:
The clock for the transmitter is derived from
2Mbps (or 1.5Mbps) signal
2MHz (or 1.5MHz) BITS clock
64Kbps (co-directional) present on the SMA connector
2Mbps signal present on the RX2 balanced or RX2 BNC unbalanced
These options can be selected from them
Clock Src
box.
Rx:
The clock for the transmitter is derived from the received signal and the jitter of the incoming signal is
suppressed.
Offset:
The clock for the transmitter is derived from the internal clock generator. It can change the offset while
measurements are running. Use the numeric key to increase and decrease the frequency shift, up to 0.01ppm.
Frequency offset: ± 50ppm with 1, 0.1, 0.01ppm resolution.
Termination
(2 Mbps only):
Terminated:
The received signal is terminated with a 75 ohm or 100 ohm (120 ohm in E1) impedance enabling the
unit to decode the signal over a wide range of cable losses.
Monitor:
To be used when the measurement is made at a Protected Monitoring Point (PMP) of network equipment.
The PMP level can range between -20 and -26dB.
Bridge:
Available on in DS1 or E1 mode. Select this mode for a high impedance monitor test or when the receiver
is connected directly in parallel to a DS1 or E1 line carrying live traffic. The isolation circuit of the unit protects the
DS1 or E1 signal from any possible disruption.
Line Code
(1.5 Mbps, 2 Mbps only): HDB3, B8ZS, AMI.
12.5.4 Pattern
Tapping the Pattern box opens the Pattern Setup screen. The pattern setup will show when OTN Mapping is set to Test Pattern.
Pattern Setup
RXT-3900 e-Manual D07-00-111P Rev A00
Содержание RXT3900
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