VeEX VePAL TX300M, Руководство пользователя

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Test Port:
In PDH mode, only the electrical interface selection is possible.
Line Code:
In DS1 mode, the line code options default to B8ZS or AMI
In DS3 mode, the line code is B3ZS or AMI
In E1 mode, the line code options default to HDB3 or AMI. Normal E1 systems use HDB3 line coding while AMI is
reserved for special applications
In E3 mode, the line code is HDB3 or AMI
Clock Source:
Can be configured as follows:
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:
1.5MHz, 2MHz, 1.5Mbps, 2Mbps, and 64kbps signals are present on the SMA connector. Only 2Mbps
signals are available on the RX2 balanced and RX2 BNC unbalanced ports.
From 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 internal clock generator. It can change the offset while measurements
are running. Use numeric key to increase and decrease the frequency shift, up to 0.01ppm. Frequency offset: ±50ppm with
1, 0.1, 0.01ppm resolution.
Balanced:
Check when using the RJ-45 connectors. The transmitter output impedance will be set to 120 ohms. The Primary test
port is "1" on top panel. If unchecked, the unit will assume that testing is taking place on the 75 ohms unbalanced BNC
connector for E1 mode.
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Payload
Tapping the Payload box opens the Tx Payload Setup screen.
Tx Payload Setup
TX300S_e-manual_D07-00-064P_RevA00