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8 Mb/s measurements
(Option 002)
Adds framed and unframed
pattern generation and
measurements at 8 Mb/s. All
specifications same as 2 Mb/s
except:
Clock: 8.448 Mb/s (internal),
500 kHz to 9 MHz (external).
Line code: HDB3.
Ternary data input: 8.448 Mb/s
± 100 ppm.
704 kb/s measurements
(Option 003)
Adds framed/unframed pattern
generation and measurements at
704 kb/s. All specifications same
as 2 Mb/s except:
Clock: 704 kb/s.
Frame error simulation: No
CRC4 mode.
Timeslot selection: For n up to
10.
Timeslot monitor: No CRC4;
MFAS replaced by timeslot 0
frames 1, 13, 15.
Overhead bits setting: Si,
unassigned frame, spare service,
spare MFAS bits.
Sub-64 kb/s testing
(Option 005)
Testing of sub-64 kb/s data signals
to ITU-T X.50 and X.58.
Structured bearer signal: Either
64 kb/s codirectional signal or one
timeslot within a 2.048 Mb/s signal
(without CAS multiframe).
Test patterns
PRBS: 2
9
− 1, 2
11
− 1 (ITU-T O.151).
Word: Fully programmable user
word (octet aligned); 14 bits for
X.50; 16 bits for X.58.
External pattern: Via X.21-
leased port.
Deselected sub-rate channel
contents
X.50: F0000000; F1111111;
F1111110; F0000001.
X.58: 11111111; 01010101.
Error add
Bit: Single; variable rate 10
−n
where n = 2 to 6.
Frame: 1 to 32 consecutive frame
bits (burst).
Frame error add ratio: 10
−n
where
n = 2 to 6.
Measurements
Errors: Bit, frame.
Alarms: Frame loss; pattern loss;
remote alarm.
User channel interface:
Conforms to ITU-T X.50 divisions
2 and 3, X.50 bis, and X.58 as
appropriate for 0.6, 1.2, 2.4, 4.8,
9.6, 14.4, 19.2, 48 kb/s. Circuit
numbering to ITU-T X.53.
Octet monitor
Displays contents of any selected
8-bit envelope. Monitors
information bits and network bits.
Generate and measure: X.50
and X.58, AIS (all ones).
Timeslot access
(Options 005 and 006)
Adds external X.21 data access
and 600 ohm audio access, and
internal talk/listen to a (64 kb/s)
timeslot of the primary data
stream.
X.21 data access
External drop/insert.
Rate: Unstructured n × 64 kb/s,
n = 1 to 6.
Rate: Structured sub-64 kb/s
(option 005 only).
Single X.50, X.58 circuit mux/
demux to 2 Mb/s, mux to 64 kb/s
via X.21 interfaces.
Mode: DCE.
Connector: 15-pin D-type.
Audio access
External drop/insert.
600 ohm (0 dB TLP nominal).
A-law codec. Single timeslot.
Connectors: 3-pin Siemens.
Input and output level: +3 dBm
to –50 dBm (nominal).
Internal talk/listen
Tone generation
and measurement
(Options 005 and 006)
2.048 Mb/s only
Generation
Into n × 64 kb/s timeslots
(n = 1 to 31).
Level: 0 to −55 dBm0, 5 dB steps.
Fixed frequencies: 404, 1008,
2100, 2804 Hz, ± 1 Hz.
Variable frequency: 100 Hz to
3.9 kHz, ± 15 Hz.
Measurement
In selected 64 kb/s timeslot.
Code word: Measurements with
offsets.
Signal level: −80 to +3 dBm0.
Channel frequency: 40 Hz to
3.99 kHz.
Specifications of options available
for both analyzers