Technical data

302 Chapter 11
E1 Analyzer
Making E1 Measurements
E1 Analyzer
received at the Primary Rx jack on the test set.
— Secondary Rx - The transmit clock frequency is derived from the signal
received at the Secondary Rx jack on the test set.
• Timeslot: Applicable only in the Channel BERT mode. Sets the active channel
to be tested for BERT.
• Fill Data: When performing Channel BERT testing this configures the source of
data transmitted in the unused slots. For drop-and-insert testing this field is
typically set to Secondary Rx.
— All 1's - Set this mode to maintain a sufficient 1's density on the unused
channels during testing. All 1's are typically transmitted on unused channels
in live E1 circuits.
— Idle - Set this mode to accommodate specific troubleshooting such as to
exercise a circuit designed for HDB3.
— Primary Rx - Fills the unused slots with Primary Rx data.
— Secondary Rx - Fills the unused slots with Secondary Rx data.
• Slip Reference: Selects the reference for the frame slip measurement.
— None - This selection disables the frame slip measurement.
— Internal - In this mode the test set compares the framing of the incoming
signal with the test set's internal clock. Three conditions are necessary when
using this mode:
1. The far end must be receiving a signal from this test set.
2. The transmit clock on the far end must be configured to synchronize on
the incoming signal.
3. The Tx Clock on this test set must be set to internal.
— Second Rx - In this mode the test set compares the frame clock timing of the
received signal on the Primary Rx jack with the frame clock timing of the
received signal on the Secondary Rx jack.