HP 37724A / Transmit menü

A HP37724A TRANSMIT menu

MAIN SETTINGS - Main settings of transmitter interface
SETTINGS CONTROL - Connection of transmitter and receiver
TEST FUNCTION
- T2 ERRORS & ALARMS - insertion of errors
- T3 FRAME MOVE
- T4 ADJUST POINTER
- T5 SEQUENCES - insertion of test sequences
- T6 STRESS TEST - test of the clock signal recognition from the optical signal
- T7 MSP (MULTIPLEXER SECTION PROTECTION) MESSAGES
- T8 DCC INSERT
- T9 OVERHEAD BER - Measure of the BER of the overhead
SECTION OVERHEAD - Header of the transmitted frame in the case of TRANSMIT_SIGNAL STM-1
PATH OVERHEAD - Header in the case of TRANSMIT_SIGNAL STM-1

MAIN SETTINGS

TRANSMIT SIGNAL - Transmitted frame
CLOCK SYNC - source of the clock signal
EXT. JITTER CLK
FREQUENCY_OFFSET
- PAYLOAD-Source of payload in the case of TRANSMIT_SIGNAL STM-1

TRANSMIT SIGNAL - Transmitted frame
We can set here, which interface should generate a framed measuring signal:
- STM-4 OPTISCH - the instrument generates an STM-4 framed digital signal with 622 Mbit/s of speed at the optical interface.
- STM-1 OPTISCH - the instrument generates an STM-1 framed digital signal with 622 Mbit/s of speed at the optical interface.
- STM-1 ELEK - the instrument generates an STM-1 framed digital signal with 155 Mbit/s of speed at the coaxial interface (on the front of the instrument).
- 140 MBIT/S - the instrument generates a framed or unframed signal with 140 Mbit/s of speed at the coaxial interface (on the rear of the instrument). Only the payload generator operates this time. li>34 MBIT/S - the instrument generates a framed or unframed signal with 34 Mbit/s of speed at the coaxial interface (on the rear of the instrument). Only the payload generator operates this time.
- 2 MBIT/S - the instrument generates a framed or unframed signal with 2 Mbit/s of speed at the coaxial interface (on the rear of the instrument). Only the payload generator operates this time.
CLOCK SYNC - Timing signal resource
- INTERN - timing signal of the measuring gadget derives from the internal timing signal generator of the instrument.
- 2M REF IN - timing signal of the measuring instrument derives from the 2Mbit/s signal connected to the 2M REF IN connector at the face. (MTS - master timing source)
- STM-1 OPT RX - timing signal of the measuring instrument derives from the signal connected to the STM-1 input.
- EXTERNAL - timing signal of the measuring instrument derives from an external 2Mbit/s or 34 Mbit/s or 140 Mbit/s signal ? connected to the backboard.
EXT. JITTER CLK-Transmitter signal jitter
If it is switched on, then the given STM-1 signal is jittered. The modulating signal is the 140 Mbit/s signal given to the 140M Jitter Clock input on the backboard.
FREQUENCY_OFFSET
If it is switched on, then the frequency of the transmitting signal can differ from the nominal value with max. +/-100 ppms.
PAYLOAD-The source of the signal to be forwarded (VC-4 payload) in the case of TRANSMIT_SIGNAL STM-1
INTERNAL - internal 140 Mbit/s payload generator, framed or unframed :
- 140MB/S UNFRAMED - 140 MB/S - The payload is a 140 Mbit/s unframed signal
- 140MB/S FRAMED - 140 MB/S - The payload is a 140 Mbit/s framed signal
- 140MB/S STRUCTURED - 140 MB/S - The payload is a 140 Mbit/s framed signal
EXTERNAL - signal of an external signal source
- 140MB/S INSERT- The payload is the signal led to the connector of 140 Mbit/s IN (backboard)
- STM-1 INSERT - The payload is the signal led to the connector of STM-1 IN (front face)
- TU12 - The payload is a TU12 content (see the multiplexing plan)
- TU2 - The payload is a TU2 content
- TU3 - The payload is a TU3 content
TU TRANSMIT
TU MODE - How to insert the PDH signal flow to be forwarded to the SDH system?
- ASYNC - asynchronous mapping. The beginning of the payload (PCM) frame and the beginning of the container frame (VC-12) are not in a bound connection with each other.
- Synchronous mapping modes:
  - FLOATING BYTE (NO TS0, TS0) no unframed
  - LOCKED BYTE (NO TS0, TS0) no signal label, no unframed
  - LOCKED BIT no signal label
  - FLOATING BIT
TU concatenated
In the case of TU2 payload
- OFF
- TU2-2C
- TU2-3C
- TU2-4C
- TU2-5C
- TU2-6C
SELECTED TU - the selected TU (see multiplexing plan)
- TUG3 [3] 1,2,3
- TUG2 [1] 1,2,3,4,5,6,7
- TU [1] 1,2,3
TU PAYLOAD - In the case of TU12 content
What will we forward in a TU-12 frame?
INTERNAL - the signal of the internal 2 Mbit/s (PCM) payload generator, which can be framed or unframed.
- INTERNAL UNFRAMED
- INTERNAL CAS - PCM30
- INTERNAL NO MFM - PCM31
- INTERNAL CRC4 - PCM 31CRC
- INTERNAL CAS,CRC4 - PCM 30CRC
EXTERNAL - the PCM signal, led to the rear panel connector
- INSERT 2 MB/s - in the case of asynchronous mapping (the PCM frame type is unimportant)
- INSERT CAS - PCM30 - in the case of synchronous mapping
- INSERT NO MFM - PCM31 - in the case of synchronous mapping
- INSERT CRC4 - PCM 31CRC - in the case of synchronous mapping
- INSERT CAS,CRC4 - PCM 30CRC - in the case of synchronous mapping
TIMESLOT - to what time slot of TU PAYLOAD will be inserted the PATTERN sequence generated by the payload generator?
(Only in the case of framed payload)
- ALL T/S - to every time slot
- SELECT TIMESLOT 1..30(31) - to a selected time slot
PATTERN
(it will be inserted to the selected time slots of the TU PAYLOAD)
- 2^15-1 - PRBS
- 2^20-1 - PRBS
- 2^23-1 - PRBS
- 2^11-1 - PRBS
- ALL ZEROS
- ALL ONES
- 1 IN 8
- USER WORD
2M OFFSET
0 .. +/100 ppm
V5)-VC-1/VC-2 PATH OVERHEAD(SIGNAL LABEL CODING)
- 000 - unequipped
- 001 - equipped, non specific payload
- 010 |
- 011 |
- 100 |
- 101 |
- 110 |
- 111 |- equipped unused
PATTERN IN OTHER TU-s
Patter sequences inserted to the TUs not used for measuring:
- Numbered
- 2^9-1
- 2^15-1
LINE CODE
In the case of INSERT:
- AMI
- HDB3

TRANSMITTER & RECEIVER - A connection between transmitter and receiver
Settings control submenu

COUPLED - setting of the transmitter and the receiver is coupled (the multiplexing plan is the same)
INDEPENDENT - setting of the transmitter and the receiver is independent

TRANSMIT TEST FUNCTION submenu

ERRORS & ALARMS - Inserting errors
Here we can set, what kind of errors we would insert into the transmitted signal.
- ERROR ADD LOCATION /TYP/RATE/:
  - OVERHEAD
    - A1A2 FRAME
    - RS B1 BIP (Regenerator Section B1 Bit Interleaved Parity)
      Rate: OFF, 1in4, 2in4, 3in4, 4in4
    - MS B2 BIP (Multiplexer Section B2 Bit Interleaved Parity)
    - PATH B3 BIP (Far End Block Error)
    - PATH FEBE
    - TU PATH BIP
    - TU PATH FEBE
  - PAYLOAD
    - 2M FRAME
    - 2M BIT
- ALARMS LOCATION
  - OVERHEAD
    - OFF
    - LOSS OF FRAME
    - MS AIS
    - MS FERF
    - LOSS OF POINTER
    - PATH AIS
    - PATH FERF - Far end receive failure
    - PATH UNEQPD
  - PAYLOAD
    - OFF
    - 2M AIS
    - 2M LOF
    - 2M RAI
FRAME MOVE
Only in the case of TRANSMIT SIGNAL STM-1!
ADJUST POINTER
POINTER TYPE
- AU POINTER
- TU POINTER
ADJUST POINTER - Type of adjusting pointer
- INCREMENT/DECREMENT
- NEW POINTER - [WITH/WITHOUT NDF]
- OFFSET - pointer setting, as a result of the bit rate difference between the transmission frame and the VC-4. Difference can be set in the range of [0.0 PPM ...+/-100 PPM]. Other issues can be set:
  - OUTPUT SIGNAL RATE:
    - CONSTANT
    - OFFSET
  - VC-4 RATE
    - CONSTANT
    - OFFSET
- G.783 - Adjusting pointer according to the Recommendation G.783 (in the case of TU pointer)
  - ADJUSTMENT TYPE
    - PERIODIC DOUBLE
    - PERIODIC SINGLE
  - INTERVAL (10MS - 10S)

SEQUENCES

Editing pattern sequence
SINGLE RUN/REPEAT RUN

OVERHEAD CHANNEL
         RSOH    3XA1,3XA2, C1 E1 F1 D1-D3
         MSOH    K1,K2  D4-D12
                 Z1 COLUMN 1  Z1 COLUMN 2   Z1 COLUMN 3
                 Z2 COLUMN 4  Z2 COLUMN 5   Z2 COLUMN 6
                 E2
         POH     J1 C2 G1 F2 Z3 Z4 Z5

        A [XXXXX]
        B [XXXXX]
        C [XXXXX]
        D [XXXXX]
        E [XXXXX]

SEQUENCE [   1] FRAMES OF [A] THEN
SEQUENCE [   0] FRAMES OF [B] THEN
SEQUENCE [   0] FRAMES OF [C] THEN
SEQUENCE [   0] FRAMES OF [D] THEN
SEQUENCE [   0] FRAMES OF [E] THEN

STRESS TEST

        STRESSING PATTERN
                ALL ZEROS
                ALL 1
                G.958
        BLOCKLENGTH X BYTES

MSP MESSAGES

Editing K1 K2 BYTE-s (on the way)

NEW TX
K1 BITS 1->4 0000: NO REQUEST
             0001: DO NOT REVERT
             0010: REVERSE REQUEST
             0011: NOT USED
             0100: EXCERCISE

        5->8 0000: NULL CHANNEL
K2 BITS 1->4 0000  BRIDGED CHANNEL NO
   BITS 5       0  1+1 ARCHITECTURE
   BITS 6->8  000: RESERVED

   CURRENT  TX   CURRENT RX   KIJELZES

K1  00000000     11111011
K2  00000000     10110101

DCC INSERT
OVERHEAD BER
- Insert PRBS into O/H byte
  - RSOH (C1, E1, F1, D1, D2, D3)
  - MSOH (K1, K2, D4...D12, Z1, Z2, E2
  - POH (J1, C2, G1, F2, H4, Z3, Z4, Z5)

TRANSMIT - SECTION OVERHEAD submenu

In the menu the SOH of the transmitted STM-1 frame can programmed.


    SETUP: STM-1 OPT
    STATIC VALUES                      COLUMNS [1,4&7]
    OTHER FUNCTIONS UNDER TEST FUNCTION
    H1/H2 DECIMAL POINTER VALUE: 117
              framing               framing
    A1  [1 1 1 1 0 1 1 0]   A2 [0 0 1 0 1 0 0 0]   C1 [0 0 0 0 0 0 0 1]
                                  orderwire             user channel
    B1   x x x x x x x x    E1 [0 0 0 0 0 0 0 0]   F1 [0 0 0 0 0 0 0 0]

    D1  [0 0 0 0 0 0 0 0]   D2 [0 0 0 0 0 0 0 0]   D3 [0 0 0 0 0 0 0 0]

    H1  [x x x x 1 0 x x]   H2  x x x x x x x x    H3  x x x x x x x x

    B2   x x x x x x x x    K1 [0 0 0 0 0 0 0 0]   K2 [0 0 0 0 0 0 0 0]

    D4  [0 0 0 0 0 0 0 0]   D5 [0 0 0 0 0 0 0 0]   D6 [0 0 0 0 0 0 0 0]

    D7  [0 0 0 0 0 0 0 0]   D8 [0 0 0 0 0 0 0 0]   D9 [0 0 0 0 0 0 0 0]

    D10 [0 0 0 0 0 0 0 0]  D11 [0 0 0 0 0 0 0 0]  D12 [0 0 0 0 0 0 0 0]
                                                          orderwire
    Z1  [0 0 0 0 0 0 0 0]   Z2 [0 0 0 0 0 0 0 0]   E2 [0 0 0 0 0 0 0 0]

TRANSMIT - PATH OVERHEAD submenu

    SETUP: STM-1 OPT
    STATIC VALUES
    OTHER FUNCTIONS UNDER TEST FUNCTION
    V1/V2 DECIMAL POINTER VALUE: 117


    J1 [DEFAULT]      -> "NU  ........ NU"
    B3  XXXXXXXX
    C2 [00000001]
    G1 [00000000]
    F2 [00000000]
    H4 [FULL SEQ]   (FULL, REDUCED, COC1 SEQUENCE)
    Z3 [00000000]
    Z4 [00000000]
    Z5 [00000000]