704 kb/s measurements, Tone generation and measurement

Specifications of options available for both analyzers

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.

Test patterns

PRBS: 29 − 1, 211 − 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.

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.

Sub-64 kb/s testing

(Option 005)	Generate and measure: X.50
	and X.58, AIS (all ones).
Testing of sub-64 kb/s data signals
to ITU-T X.50 and X.58.

Measurement

In selected 64 kb/s timeslot. Code word: Measurements with offsets.

Structured bearer signal: Either 64 kb/s codirectional signal or one timeslot within a 2.048 Mb/s signal (without CAS multiframe).

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.

Signal level: − 80 to + 3 dBm0.

Channel frequency: 40 Hz to

3.99 kHz.