3-93
Performance Tests
STM-1 Receiver Monitor Input (Options A1T, [A1U], A3R [A3S], 120)
STM-1 Receiver Monitor Input (Options A1T, [A1U],
A3R [A3S], 120)
Specification
Description
An attenuator and special cable attenuator are inserted between the STM-1 OUT
port and the STM-1 IN port. The Receiver monitor mode is verified by attenuating
the signal by 20 and 26 dB and checking for error-free operation.
Equipment Required
Procedure
1. Recall the HP 37717C DEFAULT SETTINGS as shown on 3-2.
2. Select TRANSMITTER OUTPUT [SDH] and RECEIVER INPUT [SDH].
3. Connect up the equipment as shown in Figure 3-42.
Receiver Monitor Mode Selectable 20 dB and 26 dB of flat gain
12 dB equalization at 1/2 Bit Rate
3 dB Attenuator (N-type) : HP 8491A Option 003
6 dB Attenuator (N-type) (2 off) : HP 8491A Option 006
75/50Ω Matching Pad (N-type) : HP 11852B (Qty 2)
N-type (f) to BNC (f) Adaptor : HP 1250-1536 (Qty 2)
N-type (m) to N-type (f)Adaptor : HP 1250-1475
Cable Attenuator (70 m) : HP 8120-0049
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