Front and Rear Panel ESG Family Signal Generators
Rear Panel Overview
3-18
User’s Guide
20. Q OUT Connector
The Q OUT connector outputs the analog, quadrature-phase component of I/Q modulation
from the internal baseband generator. The nominal output impedance of this connector is
50
Ω
, DC-coupled. The damage levels are > +2 V and <
−
2 V. The DC origin offset is
typically < 10 mV. The output signal levels into a 50
Ω
load are as follows:
• 0.5 V
pk
, typical, corresponds to one unit length of the I/Q vector.
• 0.69 V
pk
(2.84 dB), typical, maximum crest factor for peaks for
π
/4 DQPSK with
alpha = 0.5.
• 0.71 V
pk
(3.08 dB), typical, maximum crest factor for peaks for
π
/4 DQPSK with
alpha = 0.35.
• Typically 1 V
p-p
maximum (Option UND only).
This female BNC connector is provided only on instruments with Option UND or UN8. If
you configure your instrument with Option 1EM, this output is relocated from a BNC to an
SMB connector.
21. BER MEAS END Connector
The BER MEAS END connector outputs a signal that indicates the status of the
bit-error-rate (BER) measurements. BER measurements are being executed when the
signal is high. The damage levels are > +8 and <
−
4 V. This female SMB connector is
provided only on instruments with Option UN7.
22. BER TEST OUT Connector
The BER TEST OUT connector outputs a signal that indicates the test result of the
pass/fail judgement of the bit-error-rate measurements. The result is guaranteed at the
falling edge of the signal of the MEAS END connector. The result is pass when the signal is
low; the result is fail when the signal is high. The signal is also high when the pass/fail
judgement is set to off. The damage levels are > +8 and <
−
4 V. This female SMB connector
is provided only on instruments with Option UN7.
23. BER ERR OUT Connector
The output of the BER ERR OUT connector is normally low. When the maximum data rate
mode is set to 2 Mbps, the BER ERR OUT connector outputs pulse signals that indicate
errors. One pulse with a width of about 80 ns indicates one error bit. Pulses indicating
errors are asynchronous to the BER CLK IN and are only valid during BER measurements
(when BER MEAS END is high). The damage levels are > +8 and < −4 V. This female SMB
connector is provided only on instruments with Option UN7.
24. BER NO DATA Connector
The BER NO DATA connector outputs a signal that indicates the no data status. The no
data status is reported when there has been no clock input for more than 3 seconds or
there has been no data change for more than 200 bits. This signal is valid only when the
signal of the BER MEAS END connector is high. No data status is detected when the
signal is low. The damage levels are > +8 and < −4 V. This female SMB connector is
provided only on instruments with Option UN7.
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