6
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
