1-20
General Information
Specifications
User programmable
K1,K2 - Can only program 1 byte at a
time i.e. K1 or K2.
S1 - Bits 5 - 8 only.
VC-4 path overhead:
J1 - a unique ASCII message is
transmitted: “HP37717C
COMMUNICATIONS
PERFORMANCE ANALYZER,
GB00000000”. Terminated by CR,LF.
B3 is the BIP-8 parity (using even
parity) calculated over the previous
VC-4,before scrambling.
C2 is transmitted as Hexadecimal 12
(140 Mb/s Mapping) or 02 (2 Mb/s &
34 Mb/s Mapping),
G1 is transmitted as all zeros.
F2 is transmitted as all zeros.
H4 is transmitted as all zeros unless a
TU-12 payload is selected, in which
case the reduced H4 sequence defined
in ITU-T Rec. G.709 is transmitted.
Z3 - Z5 are transmitted as all zeros.
All other bytes are all zero’s.
VC-3 path overhead:
J1 - a unique ASCII message is
transmitted: “HP37717C
COMMUNICATIONS
PERFORMANCE ANALYZER,
GB00000000”. Terminated by CR,LF.
B3 is the BIP-8 parity (using even
parity) calculated over the previous
VC-3,before scrambling.
C2 is transmitted as Hexadecimal 04
(34 Mb/s mapping).
G1 is transmitted as all zeros.
F2 is transmitted as all zeros.
H4 is transmitted as all zeros.
Z3 - Z5 are transmitted as all zeros.
All other bytes are all zeros.
TU-12 overhead: V1,V2 - V2 and the
2 least significant bits of V1 are 0
indicating a pointer value of 0. The 4
most significant bits of V1 are 0110
indicating normal New Data Flag. The
SS bits are 10 indicating TU-12
payload. \
V5 - Bits 1 and 2 are the BIP-2 parity of
the previous VC-12 including V5 but
excluding V1 - V4. The VC-12 spans 4
frames.
Bits 5 - 7 are set to 010 indicating
Async mapping. All other bits are set to
0.
Pointer detection AU-4 pointer value,
TU-3 pointer value and TU-12 pointer
value.
Alarm generation
Loss of frame (LOF) STM-1 Only,
AU-4 Loss Of Pointer (AU-4 LOP),
Multiplexer Section (MS AIS),
Multiplexer Section FERF (MS FERF),
AU-4 Path AIS,
AU-4 Path FERF,
TU-3 Path AIS,
TU-3 Path FERF,
TU-3 LOP,
TU-12 Path AIS,
TU-12 Path FERF and
TU-12 LOP.
Equalization: Automatic for cable loss
up to 12 dB at half the bit rate.
Monitor point compensation: 20 dB
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