Tektronix BERTScope BSA125C, Быстрый старт Руководство пользователя

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Operation
The following fi gure and table describe the rear panel BNC connectors. Pattern Generator connectors are on a blue
background; Error Detector connectors are on a green background.
Figure 5: Rear panel BNC connectors
Table 9: Rear panel BNC connectors
Connector Description
1 PAT START Pattern Start input. Use this input connector to simultaneously synchronize the patterns of
multiple data streams from multiple instruments.
2 PAGE SEL Page Select. If a User Pattern fi le with two pages is loaded into the Generator, this signal
selects which page is being transmitted, based on the TTL level of the input signal. A logic 0
(low) selects Page A; a logic 1 (high) selects Page B.
3 DET START Detector Start Input. Use this input to synchronize the Error Detector with external
equipment. (LVTTL logic level, >1 k
Ω into 0 V)
4
SI OUT Sine Interference Out. Use this connector to output a voltage waveform when the Sine
Interference mode is set to External. The voltage range is from 0 mv to 3.0 V. For example,
use this signal with external equipment to apply sinusoidal interference to an optical signal.
5 REF- OUT Reference Output (–). Use this connector with the (+) connector to provide a differential
reference frequency for other instruments (typically 100 MHz). For single-ended
applications, use the (+) connector.
6 LF SIN-OUT Low-Frequency Sine Jitter Out. Use this connector to track the internal sine jitter modulation
frequency. It can be used to ensure that two BERTScope analyzers are both in-phase or
out-of-phase.
7 REF+ OUT Reference Output (+). Use this connector with the (–) connector to provide a differential
reference frequency for other instruments (typically 100 MHz).
8 REF IN Reference Input. Use this connector to provide an input reference signal (amplitude:
–6 dBm to +6 dBm; frequencies: 10, 100, 106.25, 133.33, 165.25, 166.67, and 200 MHz).
9 LF JIT-IN Low Frequency Jitter In. Use this connector to add external low frequency jitter (DC
to 80 MHz) to the instrument. The maximum signal level for this connector for normal
operation is +10 dBm (2 V
p-p
).
10 HF JIT-IN BSA286CL only. High-frequency jitter insertion input connector. Use this connector to add
external high-frequency jitter (DC to 1 GHz) to the instrument with up to 0.5% UI. Apply
signals up to 16 dBm (4 V
p-p
) if needed.
Tektronix BERTScope Bit Error Rate Analyzers Quick Start User Manual 9