Atec Tektronix-ST2400A User Manual

Page 4

page 4

ST2400A
Transmitter
Specifications

• Through Mode with Over-

head Editing, Error, and
Alarm Injection

• Direct user download of

software updates

• CCITT/ITU G.708, G.709

and GR-253-CORE framing

• Complete Remote Control

– RS-232 and GPIB ports,

and standard printer
interfaces

– LabView, LabWindows

CVI, and HP Vee

• Standard tributary

interfaces
– STM-1e 155 electrical/

STS-3 155 electrical

– STM-1 155 optical/

OC-3 155 optical

– STM-4 622 optical/

OC-12 622 optical

• Interface to Regenerator

Section Terminating Ele-
ment and Multiplexer Sec-
tion Terminating Element
and other test equipment

With firmware version 5.0
(Opt. 42), the following new
features are added to capabil-
ities of the ST2400A:
• Payload bit error injec-

tion/B3 Injection on the TX
side (TSE)

• B3, Path-REI, Payload bit

error count measurement
on the RX side (TSE ES,
SES (SDH only))

• Alarm signal status (RX)

– Path RDI, Loss of Pointer,
Path AIS, Path REI

• Path Overhead Monitor

(RX) – Displays value of
bytes: J1, B3, C2, G1, F2,
H4, Z3/F3, Z4, N1

• For the path overhead, C2

byte added at TX (Path Sig-
nal Label C2) – Identifies
High Order Path Label
Unequipped and High
Order Path Label Mis-
match. C2 byte can be set to
any value from 0x00 to
0xFF.

• B3 Path Analysis/J1 Path

Trace (displayed as ASCII
text).

• TX Patterns. PRBS 2

-1

and 2

-1 Inverted; Fixed

(00 to FF)

• Pointers. Pointer Value dis-

played (0 to 782). Pointer
Measurement Counts for
Positive Pointer Justifica-
tions, Negative Pointer Jus-
tifications, New Data Flag
(NDF)

• Extended capability of

View History button

• APS Switch Time measure-

ment (LOF, LOS durations).
APS testing can be per-
formed by causing protec-
tion switch via control of
K1/K2 bytes and then
displaying time to restore
frame synchronization.
Highly-accurate LOF timer
enables this test to be
performed with <1 ms
resolution.

• RX mapping (PRBS 2

-1

and 2

-1 Inverted; PRBS

-1 per ITU-T O.151 and

-1 Inverted per ITU-T

O.181, User-defined byte
0x00 to 0xFF)

Applications

The ST2400A meets the
needs of development, manu-
facturing, and service engi-
neers by providing the capa-
bilities for:
• System interrogation and

conformance testing

• Manufacturing Production

Testing

• Network Integrity testing
• Network Performance

monitoring

• Network Troubleshooting

2.488 GBIT/S LONG REACH LASER OPTIONS
1310/1550 WAVELENGTH

1310 nm ± 6 nm/1550 nm ± 6 nm
Power – 0 dBm (typical).
Spectral Width – 1 nm modulated mode
(maximum), 0.3 nm (typical).
Wavelength Stability – < ± 0.1 nm
(minimum).
Wavelength Adjustment Range – > ± 1 nm
(uncalibrated).
Side Mode Suppression Ratio – 30 dB.
Output Power Variation, CW Mode –
± 0.1 dB (typical).
Output Power Variation, Between Modu-
lated Mode and Unmodulated Mode –
± 0.5 dB (typical).
Extinction Ratio, Modulated Mode –
> 10 dB.
Optical Waveform – per ITU-T G.691/G.957
and Bellcore GR-253-CORE/GR-2918-CORE.
Safety Classification – Class IIIB per 21
CFR 1040.10; Class IIIA per IEC 825-1.
Category – SDH L-16.1/SONET LR-1.
1550 Dispersion Budget – 1800 ps/nm;
2 dB power penalty.
Category – SDH L-16.2/SONET LR-2.

2.488 GBIT/S ELECTRICAL OUTPUTS

Single-ended clock and data interfaces;
unterminated ECL; requires connection to
an AC-coupled 50

Ω

termination through a

bias-tee network supplying current for the
ECL outputs; falling edge of output clock
coincides with data edge crossing ±100 ps;
SMA connectors. ECL specifications: At
high output voltage, 25°C, –0.98 V (min). At
low output voltage, 25°C, –1.95 V (min)
and –1.63 V (max).

TRIBUTARY ADD INTERFACE

Inputs monitored for LOS and LOF, status
displayed on front-panel LEDs.
155 Mbit/s Electrical:

Ω

BNC CMI per ITU-T G.703 and

Bellcore GR-253-CORE.

155/622 Mbit/s Optical:

Wideband input: 1250 nm to 1600 nm.
Minimum sensitivity: –28 dBm at
10

–10

BER.

Overload limit: –8 dBm at 10

–10

BER per

ITU-T G.957 and Bellcore GR-253-CORE.